scanningn.

/ˈskanɪŋ/

Etymology: < scan v. + -ing suffix¹.

The action of the verb.

a. Prosody. = scansion n. 2.

ΘΚΠ

society > leisure > the arts > literature > poetry > study of poetry > [noun] > prosody > metrics > scansion

scanningc1440

meting1644

scansion1671

c1440 Promptorium Parvulorum 442/2 Scannynge, of verse, scansio.

1586 W. Webbe Disc. Eng. Poetrie sig. G.iiii All quantities necessary to the skannning [sic] of any verse.

1676 A. Marvell Mr. Smirke sig. B2^v This Scanning was a liberal Art that we learn'd at Grammar-School.

1797 Monthly Mag. 3 258 It will be verse only to the scanning, and neither verse nor prose to the ear.

1886 J. B. Mayor Eng. Metre iv. 54 We come now to the lines which are said to be beyond the reach of analysis by feet. I give what I consider the true scanning of each.

b. Pathology. (Cf. scanning adj. 2.)

ΘΚΠ

the mind > language > speech > defective or inarticulate speech > [noun] > specific disorders or faults

tongue-tiedness1598

plateasm1656

tongue-tying1762

paraphonia1772

lullaby-speech1822

cleft palate1847

paralalia1848

logoneurosis1857

zetacism1860

alogia1864

lallation1864

lambdacism1864

semi-mute1864

heterophemy1875

agrammatism1877

bradyphrasia1877

heterophasia1877

logopathy1877

paragraphia1877

paralexia1877

paraphasia1877

paraphrasia1877

verbigeration1877

recurring utterance1878

word blindness1878

word deafness1878

scanning1887

sigmatism1888

idioglossia1891

staccato utterance1898

word salad1904

palilalia1908

paragrammatism1924

idiolalia1930

dysprosody1947

Broca's aphasia1959

1887 Brit. Med. Jrnl. 2 Apr. 732/2 A case of locomotor ataxy..with ‘scanning’ of speech.

a. Close investigation or consideration, critical examination or judgement; discussion, comment, perception, discernment. Cf. scan v. 2b. Phrases, †to have (a matter) in scanning, †to come, fall to scanning.

ΘΚΠ

the mind > attention and judgement > enquiry > investigation, inspection > close examination, scrutiny > [noun]

examininga1325

examinationa1450

examine1494

examen1502

scanning1560

scrutation1593

scrutiny1604

pervestigation1610

microscope1671

introspectiona1676

scan1706

bolting1771

conning1823

grubbing1831

vivisection1880

searchlight1891

the mind > attention and judgement > enquiry > investigation, inspection > close examination, scrutiny > examine closely [verb (intransitive)] > be scrutinized

to come, fall to scanning1560

1560 J. Daus tr. J. Sleidane Commentaries f. ccxxxviij Therfore muste prynces and noble men be at the skannyng therof.

1575 Record's Grounde of Artes (rev. ed.) Cc vj b If some cunning Lawyers had this matter in scanning, they would determine this Testament to be quite voide.

?1576 G. Gascoigne Spoyle of Antwerpe sig. C7 But I leaue the skanning of theyr deedes vnto God.

1602 R. Carew Surv. Cornwall i. f. 57 Another question falleth sometimes into scanning, namely [etc.].

1611 J. Speed Hist. Great Brit. vii. xliii. 374/1 It was therefore instantly desired, that the cause might once more come to scanning.

1679 T. Hobbes Behemoth (unauthorized ed.) 3 The private Interpretation of the Scripture exposed to every Mans scanning in his Mother Tongue.

1699 J. Pomfret Marriage Earl of A—— 76 Ev'ry teeming thought, Is to the scanning of her judgment brought.

1714 T. Hearne Ductor Historicus (ed. 3) I. iii. 413 They used a sweet fluent kind of Rhetorick..which..serv'd only to put a present good Face upon an Argument, but would not bear Scanning.

1841 T. Carlyle On Heroes iii. 165 The ‘Tree Igdrasil’ buds and withers by its own laws,—too deep for our scanning.

b. The action of systematically traversing with a beam or detector, as in Television. In Medicine, the process or action of making a scan of the body or part of it; cf. brain scanning n. at brain n. Compounds 2.

ΘΚΠ

the world > physical sensation > sight and vision > optical skills and techniques > [noun] > optical scanning

scanning1927

scan1937

optical scanning1953

optical character recognition1958

OCR1966

society > communication > broadcasting > television > visual element > [noun] > scanning, etc.

scanning1927

scanning spot1929

flying spot1933

interlacing1935

line scanning1935

interlace1936

line scan1938

matrixing1951

line blanking1952

the world > health and disease > healing > diagnosis or prognosis > radiography or radiology > scanning > [noun]

scanning1951

scintiscanning1954

photoscanning1956

scintigraphy1957

scintillography1958

1927 Bell Syst. Techn. Jrnl. 6 552 We have thus available in television the same artifice..that is, of scanning, or running over the elements of the image in sequence.

1931 Daily Tel. 6 Jan. 11/7 A selective apparatus that dissects each picture into its component elements of light and shade, a process known as ‘scanning’.

1933 Discovery May 156/2 As much as 120-line scanning was used, thus permitting very fine detail indeed.

1936 Electr. Commun. XV. 187/1 The most recent demonstration of television in Italy was at Milan in April, 1936. The equipment employed electronic scanning for transmission.

1951 Nucleonics Aug. 46/2 The results indicated the desirability of an automatic scanning and recording device.

1956 Radiology 66 730/1 During the past four years.., external scintillation counter scanning has been used to provide information relative to the distribution of radioactive isotopes in patients.

1968 Sci. News 6 Apr. 333/1 In scanning, a radioactivity compound is administered to the patient, after which the compound's distribution is mapped out by a scintillation camera that detects gamma rays coming from the child.

1971 Amateur Photographer 13 Jan. 65/2 The system [for reading videotape] was later superseded by transfer scanning, using four magnetic heads on a 2 in diameter drum rotating at 14,400 rpm almost at right angles across 2 in tape, pulled past at 15 ips.

1975 D. G. Fink Electronics Engineers' Handbk. xx. 7 Interlaced scanning is achieved by making the horizontal (line-scanning) rate an odd multiple of one-half the vertical (field-scanning) rate.

1987 D. J. Weatherall et al. Oxf. Textbk. Med. (ed. 2) II. xviii. 138/1 If obstruction is detected pelvic scanning may reveal the cause and drainage can be effected..by..nephrostomies performed under ultrasound control.

c. The rapid or systematic searching of textual material for particular information or features.

ΘΚΠ

the mind > attention and judgement > discovery > research > [noun]

inquisitionc1384

inquiryc1440

searcha1500

quest1531

research1604

researching1611

digging1827

fact-finding1854

delving1888

scanning1937

oppo1990

society > communication > reading > [noun] > rapidly

scanning1937

speed-reading1965

the world > physical sensation > sight and vision > seeing or looking > [noun] > scanning of text

scanning1937

1937 Discovery Sept. 256/2 A random scanning of the list reveals many names familiar to the British Association.

1954 Amer. Documentation 5 18/2 Speeds of operation are such as to permit scanning and correlating of generic and specific aspects of indexes in a reasonable time.

1967 Eng. Stud. 48 60 (heading) An archive of older Scottish texts for scanning by computer.

1970 O. Dopping Computers & Data Processing xvii. 277 The misplaced record has only been moved one step, and if the computer were to continue the forward scanning, four scans would be needed.

1975 Lang. for Life (Dept. Educ. & Sci.) viii. 115 The intermediate skills, so essential in word attack in the early stages, are at work in skimming, scanning, and the extraction of meaning in the more complex reading tasks of the later stages.

3. auditory scanning: the emission of short pulses of sound and detection of echoes from nearby objects, thought to be used by dolphins for the location and ranging of submerged objects.

ΘΚΠ

the world > animals > mammals > order Cetacea (whales) > suborder Odontoceti > [noun] > family Delphinidae > delphinus delphis (dolphin) > auditory scanning

auditory scanning1960

1960 W. N. Kellogg in Psychol. Record X. 26 Since the noises which make up the echoes are emitted by the dolphin itself, the activity as a whole amounts to a kind of scanning by sound. We suggest the term auditory scanning, therefore, as a good name for both the acoustic and the general behavior comprising this elaborate pattern of activity.

1963 Language 39 464 The dolphin's auditory scanning is shown to consist of the emission of a continuous series of sound signals for echolocation plus binaural localization.

Compounds

C1. General attributive.

scanning device n.

ΚΠ

1931 Daily Tel. 6 Jan. 11/7 Below this speed the pictures flicker, and the intermittences of the scanning device obstruct the view.

scanning frequency n.

ΚΠ

1930 B.B.C. Year-bk. 450/2 Scanning frequency, the rate at which the picture or object is scanned.

scanning movement n.

ΚΠ

1958 Observer 12 Oct. 15/4 Every few minutes, the radio telescope makes small scanning movements, up and down and from side to side. This helps to fix the direction of the radio signals from the rocket to within half a degree.

scanning speed n.

ΚΠ

1929 H. H. Sheldon & E. N. Grisewood Television xii. 126 The scanning speed may be greatly increased by use of a series of oppositely rotating lens~discs.

1934 Sun (Baltimore) 20 Aug. 2/3 A tiny metal mirror, mounted on a slender rod and vibrated at scanning speeds, was presented..as..the solution of one of television's major problems.

C2.

scanning coil n. any of four coils arranged in pairs around the neck of a cathode-ray tube, the magnetic field of which is varied so as to cause the electron beam to trace out a raster pattern on the screen of the tube.

ΘΚΠ

society > communication > broadcasting > television > transmitting or receiving apparatus > [noun] > scanning devices

mirror drum1927

scanning disc1927

scanner1929

Nipkow disc1934

line scan1938

scanning coil1938

1938 J. H. Reyner Testing Television Sets iv. 41 The function of the transformer is to step-down the voltage applied to the scanning coil which operates with a correspondingly larger current.

1978 Broadcast 27 Nov. 15/2 Camera heads are still stuck with bulky camera tubes, scanning coils, splitter blocks and such paraphernalia.

scanning disc n. a rotating disc having a spiral of holes near the edge, used in mechanical systems of television to provide a sequential scan of a scene by optical means for transmission and to permit reconstruction of the scene at the receiver.

ΘΚΠ

society > communication > broadcasting > television > transmitting or receiving apparatus > [noun] > scanning devices

mirror drum1927

scanning disc1927

scanner1929

Nipkow disc1934

line scan1938

scanning coil1938

1927 Wireless World 20 Apr. 685/1 This film was then repeated for an observer by means of a receiving equipment involving the use of a suitable neon tube and a scanning disc.

1928 Sci. & Invention (U.S.) Oct. 489/2 If..the scanning disc has 48 holes and spins at..600 revolutions per minute.

1930 B.B.C. Year-bk. 450/2 Scanning disc, in Television or Picture Transmission, a rotating opaque disc perforated with a series of holes in the form of a spiral. A ray of light passing through the holes is thus caused to move over (scan) a picture or an object placed behind the holes on the farther side from the source of light.

1975 D. G. Fink Electronics Engineers' Handbk. xx. 82 An exciter lamp illuminates the subject copy via a curved mirror, and an objective lens images the reflected light to an aperture plate in front of a scanning disk. The scanning disk is opaque except for a transparent spiral, which curves outward from the center of the disk.

scanning electron microscope n. a form of electron microscope in which an electron beam is scanned in a raster pattern across the specimen; an electrical signal is obtained by collecting and amplifying secondary electrons emitted by the specimen and is applied to a cathode-ray tube scanned in synchronism with the electron beam; hence scanning electron micrograph, scanning electron microscopy.

ΘΚΠ

the world > physical sensation > sight and vision > optical instruments > magnification or magnifying instruments > [noun] > microscope > electron microscopes

microscope1907

electron microscope1932

field emission microscope1941

field ion microscope1952

scanning electron microscope1953

SEM1968

stereoscan1968

transmission electron microscope1969

STM1982

1953 Proc. Inst. Electr. Engineers 100 ii. 246/2 The main advantage of the scanning electron microscope for transparent specimens is that the resolution is not affected by energy losses of the electrons in the specimen, which in the conventional electron microscope give rise to chromatic aberration.

1962 Nature 6 Oct. 82/1 Figs. 1 and 2 are scanning electron micrographs.

1966 D. G. Brandon Mod. Techniques Metallogr. 51 Image formation by..scanning electron microscopy.

1972 Sci. Amer. Jan. 55/2 The scanning electron microscope is capable of a range of magnifications that overlaps the range of the light microscope or hand magnifying glass at the low end and the range of the transmission electron microscope at the high end.

1975 J. I. Goldstein et al. in Goldstein & Yakowitz Practical Scanning Electron Microsc. i. 3 The purpose of this brief historical introduction is to point out the pioneers of scanning electron microscopy and in the process trace the evolution of the instrument.

1979 Sci. Amer. Sept. 30/3 Wonderful drawings..complemented by scanning electron micrographs.

scanning field n. = raster n.² 1.

ΘΚΠ

society > communication > broadcasting > television > visual element > [noun] > picture elements, lines, or rasters

picture element1925

line1929

scanning line1929

scanning field1935

scanning raster1935

field1938

line standard1959

pixel1965

1935 Television Today 1 247/1 Such a scanning field is known as a ‘raster’.

1975 D. G. Fink Electronics Engineers' Handbk. xx. 5 The lines of the second scanning field fall between the lines of the first field.

scanning line n. = line n.² 7i.

ΘΚΠ

society > communication > broadcasting > television > visual element > [noun] > picture elements, lines, or rasters

picture element1925

line1929

scanning line1929

scanning field1935

scanning raster1935

field1938

line standard1959

pixel1965

1929 Proc. IRE 17 1586 He first arrived at a correlation between the number of ‘halftone lines per inch’ and the corresponding television ‘scanning lines’.

1933 Discovery Oct. 318/1 The new German standard picture, consisting of 180 scanning lines, is officially considered sufficient for the opening of regular transmissions.

1960 in Rep. Comm. Broadcasting 334 in Parl. Papers 1961–2 (Cmnd. 1753) IX. 259 There was..a significant difference in the visibility of the scanning lines— the 625-line pictures being..noticeably better than the 405-line pictures.

scanning raster n. = raster n.² 1.

ΘΚΠ

society > communication > broadcasting > television > visual element > [noun] > picture elements, lines, or rasters

picture element1925

line1929

scanning line1929

scanning field1935

scanning raster1935

field1938

line standard1959

pixel1965

1935 Television Today 1 247/2 The production of a scanning raster on the cathode-ray tube of a television receiver by electrical means involves the application of two voltages of saw-tooth wave form to the two pairs of deflecting plates of a cathode-ray tube.

1975 D. G. Fink Electronics Engineers' Handbk. xx. 33 The starting point for generating color pictures is the optical and electronic superposition of the red-, green-, and blue~tube scanning rasters.

scanning spot n. the spot where an incident beam (usually of electrons or light) strikes the surface it is scanning.

ΘΚΠ

society > communication > broadcasting > television > visual element > [noun] > scanning, etc.

scanning1927

scanning spot1929

flying spot1933

interlacing1935

line scanning1935

interlace1936

line scan1938

matrixing1951

line blanking1952

1929 H. H. Sheldon & E. N. Grisewood Television xiii. 139 Since the scanning spot has finite dimensions, its response to an abrupt change in the surface being viewed will be less sharply defined than the original.

1975 D. G. Fink Electronics Engineers' Handbk. xx. 5 The electron beams that create the scanning spots are approximately circular, but their intensity is not uniform.

This entry has not yet been fully updated (first published 1910; most recently modified version published online June 2021).

单词	scanning
释义	scanningn. /ˈskanɪŋ/ Etymology: < scan v. + -ing suffix¹. The action of the verb. 1. a. Prosody. = scansion n. 2. ΘΚΠ society > leisure > the arts > literature > poetry > study of poetry > [noun] > prosody > metrics > scansion scanningc1440 meting1644 scansion1671 c1440 Promptorium Parvulorum 442/2 Scannynge, of verse, scansio. 1586 W. Webbe Disc. Eng. Poetrie sig. G.iiii All quantities necessary to the skannning [sic] of any verse. 1676 A. Marvell Mr. Smirke sig. B2^v This Scanning was a liberal Art that we learn'd at Grammar-School. 1797 Monthly Mag. 3 258 It will be verse only to the scanning, and neither verse nor prose to the ear. 1886 J. B. Mayor Eng. Metre iv. 54 We come now to the lines which are said to be beyond the reach of analysis by feet. I give what I consider the true scanning of each. b. Pathology. (Cf. scanning adj. 2.) ΘΚΠ the mind > language > speech > defective or inarticulate speech > [noun] > specific disorders or faults tongue-tiedness1598 plateasm1656 tongue-tying1762 paraphonia1772 lullaby-speech1822 cleft palate1847 paralalia1848 logoneurosis1857 zetacism1860 alogia1864 lallation1864 lambdacism1864 semi-mute1864 heterophemy1875 agrammatism1877 bradyphrasia1877 heterophasia1877 logopathy1877 paragraphia1877 paralexia1877 paraphasia1877 paraphrasia1877 verbigeration1877 recurring utterance1878 word blindness1878 word deafness1878 scanning1887 sigmatism1888 idioglossia1891 staccato utterance1898 word salad1904 palilalia1908 paragrammatism1924 idiolalia1930 dysprosody1947 Broca's aphasia1959 1887 Brit. Med. Jrnl. 2 Apr. 732/2 A case of locomotor ataxy..with ‘scanning’ of speech. 2. a. Close investigation or consideration, critical examination or judgement; discussion, comment, perception, discernment. Cf. scan v. 2b. Phrases, †to have (a matter) in scanning, †to come, fall to scanning. ΘΚΠ the mind > attention and judgement > enquiry > investigation, inspection > close examination, scrutiny > [noun] examininga1325 examinationa1450 examine1494 examen1502 scanning1560 scrutation1593 scrutiny1604 pervestigation1610 microscope1671 introspectiona1676 scan1706 bolting1771 conning1823 grubbing1831 vivisection1880 searchlight1891 the mind > attention and judgement > enquiry > investigation, inspection > close examination, scrutiny > examine closely [verb (intransitive)] > be scrutinized to come, fall to scanning1560 1560 J. Daus tr. J. Sleidane Commentaries f. ccxxxviij Therfore muste prynces and noble men be at the skannyng therof. 1575 Record's Grounde of Artes (rev. ed.) Cc vj b If some cunning Lawyers had this matter in scanning, they would determine this Testament to be quite voide. ?1576 G. Gascoigne Spoyle of Antwerpe sig. C7 But I leaue the skanning of theyr deedes vnto God. 1602 R. Carew Surv. Cornwall i. f. 57 Another question falleth sometimes into scanning, namely [etc.]. 1611 J. Speed Hist. Great Brit. vii. xliii. 374/1 It was therefore instantly desired, that the cause might once more come to scanning. 1679 T. Hobbes Behemoth (unauthorized ed.) 3 The private Interpretation of the Scripture exposed to every Mans scanning in his Mother Tongue. 1699 J. Pomfret Marriage Earl of A—— 76 Ev'ry teeming thought, Is to the scanning of her judgment brought. 1714 T. Hearne Ductor Historicus (ed. 3) I. iii. 413 They used a sweet fluent kind of Rhetorick..which..serv'd only to put a present good Face upon an Argument, but would not bear Scanning. 1841 T. Carlyle On Heroes iii. 165 The ‘Tree Igdrasil’ buds and withers by its own laws,—too deep for our scanning. b. The action of systematically traversing with a beam or detector, as in Television. In Medicine, the process or action of making a scan of the body or part of it; cf. brain scanning n. at brain n. Compounds 2. ΘΚΠ the world > physical sensation > sight and vision > optical skills and techniques > [noun] > optical scanning scanning1927 scan1937 optical scanning1953 optical character recognition1958 OCR1966 society > communication > broadcasting > television > visual element > [noun] > scanning, etc. scanning1927 scanning spot1929 flying spot1933 interlacing1935 line scanning1935 interlace1936 line scan1938 matrixing1951 line blanking1952 the world > health and disease > healing > diagnosis or prognosis > radiography or radiology > scanning > [noun] scanning1951 scintiscanning1954 photoscanning1956 scintigraphy1957 scintillography1958 1927 Bell Syst. Techn. Jrnl. 6 552 We have thus available in television the same artifice..that is, of scanning, or running over the elements of the image in sequence. 1931 Daily Tel. 6 Jan. 11/7 A selective apparatus that dissects each picture into its component elements of light and shade, a process known as ‘scanning’. 1933 Discovery May 156/2 As much as 120-line scanning was used, thus permitting very fine detail indeed. 1936 Electr. Commun. XV. 187/1 The most recent demonstration of television in Italy was at Milan in April, 1936. The equipment employed electronic scanning for transmission. 1951 Nucleonics Aug. 46/2 The results indicated the desirability of an automatic scanning and recording device. 1956 Radiology 66 730/1 During the past four years.., external scintillation counter scanning has been used to provide information relative to the distribution of radioactive isotopes in patients. 1968 Sci. News 6 Apr. 333/1 In scanning, a radioactivity compound is administered to the patient, after which the compound's distribution is mapped out by a scintillation camera that detects gamma rays coming from the child. 1971 Amateur Photographer 13 Jan. 65/2 The system [for reading videotape] was later superseded by transfer scanning, using four magnetic heads on a 2 in diameter drum rotating at 14,400 rpm almost at right angles across 2 in tape, pulled past at 15 ips. 1975 D. G. Fink Electronics Engineers' Handbk. xx. 7 Interlaced scanning is achieved by making the horizontal (line-scanning) rate an odd multiple of one-half the vertical (field-scanning) rate. 1987 D. J. Weatherall et al. Oxf. Textbk. Med. (ed. 2) II. xviii. 138/1 If obstruction is detected pelvic scanning may reveal the cause and drainage can be effected..by..nephrostomies performed under ultrasound control. c. The rapid or systematic searching of textual material for particular information or features. ΘΚΠ the mind > attention and judgement > discovery > research > [noun] inquisitionc1384 inquiryc1440 searcha1500 quest1531 research1604 researching1611 digging1827 fact-finding1854 delving1888 scanning1937 oppo1990 society > communication > reading > [noun] > rapidly scanning1937 speed-reading1965 the world > physical sensation > sight and vision > seeing or looking > [noun] > scanning of text scanning1937 1937 Discovery Sept. 256/2 A random scanning of the list reveals many names familiar to the British Association. 1954 Amer. Documentation 5 18/2 Speeds of operation are such as to permit scanning and correlating of generic and specific aspects of indexes in a reasonable time. 1967 Eng. Stud. 48 60 (heading) An archive of older Scottish texts for scanning by computer. 1970 O. Dopping Computers & Data Processing xvii. 277 The misplaced record has only been moved one step, and if the computer were to continue the forward scanning, four scans would be needed. 1975 Lang. for Life (Dept. Educ. & Sci.) viii. 115 The intermediate skills, so essential in word attack in the early stages, are at work in skimming, scanning, and the extraction of meaning in the more complex reading tasks of the later stages. 3. auditory scanning: the emission of short pulses of sound and detection of echoes from nearby objects, thought to be used by dolphins for the location and ranging of submerged objects. ΘΚΠ the world > animals > mammals > order Cetacea (whales) > suborder Odontoceti > [noun] > family Delphinidae > delphinus delphis (dolphin) > auditory scanning auditory scanning1960 1960 W. N. Kellogg in Psychol. Record X. 26 Since the noises which make up the echoes are emitted by the dolphin itself, the activity as a whole amounts to a kind of scanning by sound. We suggest the term auditory scanning, therefore, as a good name for both the acoustic and the general behavior comprising this elaborate pattern of activity. 1963 Language 39 464 The dolphin's auditory scanning is shown to consist of the emission of a continuous series of sound signals for echolocation plus binaural localization. Compounds C1. General attributive. scanning device n. ΚΠ 1931 Daily Tel. 6 Jan. 11/7 Below this speed the pictures flicker, and the intermittences of the scanning device obstruct the view. scanning frequency n. ΚΠ 1930 B.B.C. Year-bk. 450/2 Scanning frequency, the rate at which the picture or object is scanned. scanning movement n. ΚΠ 1958 Observer 12 Oct. 15/4 Every few minutes, the radio telescope makes small scanning movements, up and down and from side to side. This helps to fix the direction of the radio signals from the rocket to within half a degree. scanning speed n. ΚΠ 1929 H. H. Sheldon & E. N. Grisewood Television xii. 126 The scanning speed may be greatly increased by use of a series of oppositely rotating lens~discs. 1934 Sun (Baltimore) 20 Aug. 2/3 A tiny metal mirror, mounted on a slender rod and vibrated at scanning speeds, was presented..as..the solution of one of television's major problems. C2. scanning coil n. any of four coils arranged in pairs around the neck of a cathode-ray tube, the magnetic field of which is varied so as to cause the electron beam to trace out a raster pattern on the screen of the tube. ΘΚΠ society > communication > broadcasting > television > transmitting or receiving apparatus > [noun] > scanning devices mirror drum1927 scanning disc1927 scanner1929 Nipkow disc1934 line scan1938 scanning coil1938 1938 J. H. Reyner Testing Television Sets iv. 41 The function of the transformer is to step-down the voltage applied to the scanning coil which operates with a correspondingly larger current. 1978 Broadcast 27 Nov. 15/2 Camera heads are still stuck with bulky camera tubes, scanning coils, splitter blocks and such paraphernalia. scanning disc n. a rotating disc having a spiral of holes near the edge, used in mechanical systems of television to provide a sequential scan of a scene by optical means for transmission and to permit reconstruction of the scene at the receiver. ΘΚΠ society > communication > broadcasting > television > transmitting or receiving apparatus > [noun] > scanning devices mirror drum1927 scanning disc1927 scanner1929 Nipkow disc1934 line scan1938 scanning coil1938 1927 Wireless World 20 Apr. 685/1 This film was then repeated for an observer by means of a receiving equipment involving the use of a suitable neon tube and a scanning disc. 1928 Sci. & Invention (U.S.) Oct. 489/2 If..the scanning disc has 48 holes and spins at..600 revolutions per minute. 1930 B.B.C. Year-bk. 450/2 Scanning disc, in Television or Picture Transmission, a rotating opaque disc perforated with a series of holes in the form of a spiral. A ray of light passing through the holes is thus caused to move over (scan) a picture or an object placed behind the holes on the farther side from the source of light. 1975 D. G. Fink Electronics Engineers' Handbk. xx. 82 An exciter lamp illuminates the subject copy via a curved mirror, and an objective lens images the reflected light to an aperture plate in front of a scanning disk. The scanning disk is opaque except for a transparent spiral, which curves outward from the center of the disk. scanning electron microscope n. a form of electron microscope in which an electron beam is scanned in a raster pattern across the specimen; an electrical signal is obtained by collecting and amplifying secondary electrons emitted by the specimen and is applied to a cathode-ray tube scanned in synchronism with the electron beam; hence scanning electron micrograph, scanning electron microscopy. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > magnification or magnifying instruments > [noun] > microscope > electron microscopes microscope1907 electron microscope1932 field emission microscope1941 field ion microscope1952 scanning electron microscope1953 SEM1968 stereoscan1968 transmission electron microscope1969 STM1982 1953 Proc. Inst. Electr. Engineers 100 ii. 246/2 The main advantage of the scanning electron microscope for transparent specimens is that the resolution is not affected by energy losses of the electrons in the specimen, which in the conventional electron microscope give rise to chromatic aberration. 1962 Nature 6 Oct. 82/1 Figs. 1 and 2 are scanning electron micrographs. 1966 D. G. Brandon Mod. Techniques Metallogr. 51 Image formation by..scanning electron microscopy. 1972 Sci. Amer. Jan. 55/2 The scanning electron microscope is capable of a range of magnifications that overlaps the range of the light microscope or hand magnifying glass at the low end and the range of the transmission electron microscope at the high end. 1975 J. I. Goldstein et al. in Goldstein & Yakowitz Practical Scanning Electron Microsc. i. 3 The purpose of this brief historical introduction is to point out the pioneers of scanning electron microscopy and in the process trace the evolution of the instrument. 1979 Sci. Amer. Sept. 30/3 Wonderful drawings..complemented by scanning electron micrographs. scanning field n. = raster n.² 1. ΘΚΠ society > communication > broadcasting > television > visual element > [noun] > picture elements, lines, or rasters picture element1925 line1929 scanning line1929 scanning field1935 scanning raster1935 field1938 line standard1959 pixel1965 1935 Television Today 1 247/1 Such a scanning field is known as a ‘raster’. 1975 D. G. Fink Electronics Engineers' Handbk. xx. 5 The lines of the second scanning field fall between the lines of the first field. scanning line n. = line n.² 7i. ΘΚΠ society > communication > broadcasting > television > visual element > [noun] > picture elements, lines, or rasters picture element1925 line1929 scanning line1929 scanning field1935 scanning raster1935 field1938 line standard1959 pixel1965 1929 Proc. IRE 17 1586 He first arrived at a correlation between the number of ‘halftone lines per inch’ and the corresponding television ‘scanning lines’. 1933 Discovery Oct. 318/1 The new German standard picture, consisting of 180 scanning lines, is officially considered sufficient for the opening of regular transmissions. 1960 in Rep. Comm. Broadcasting 334 in Parl. Papers 1961–2 (Cmnd. 1753) IX. 259 There was..a significant difference in the visibility of the scanning lines— the 625-line pictures being..noticeably better than the 405-line pictures. scanning raster n. = raster n.² 1. ΘΚΠ society > communication > broadcasting > television > visual element > [noun] > picture elements, lines, or rasters picture element1925 line1929 scanning line1929 scanning field1935 scanning raster1935 field1938 line standard1959 pixel1965 1935 Television Today 1 247/2 The production of a scanning raster on the cathode-ray tube of a television receiver by electrical means involves the application of two voltages of saw-tooth wave form to the two pairs of deflecting plates of a cathode-ray tube. 1975 D. G. Fink Electronics Engineers' Handbk. xx. 33 The starting point for generating color pictures is the optical and electronic superposition of the red-, green-, and blue~tube scanning rasters. scanning spot n. the spot where an incident beam (usually of electrons or light) strikes the surface it is scanning. ΘΚΠ society > communication > broadcasting > television > visual element > [noun] > scanning, etc. scanning1927 scanning spot1929 flying spot1933 interlacing1935 line scanning1935 interlace1936 line scan1938 matrixing1951 line blanking1952 1929 H. H. Sheldon & E. N. Grisewood Television xiii. 139 Since the scanning spot has finite dimensions, its response to an abrupt change in the surface being viewed will be less sharply defined than the original. 1975 D. G. Fink Electronics Engineers' Handbk. xx. 5 The electron beams that create the scanning spots are approximately circular, but their intensity is not uniform. This entry has not yet been fully updated (first published 1910; most recently modified version published online June 2021). scanningadj. /ˈskanɪŋ/ Etymology: < scan v. + -ing suffix². 1. That scans or examines closely; critical, searching. ΘΚΠ the world > physical sensation > sight and vision > a look or glance > [adjective] > piercing poignant?a1439 sharp1535 narrow1587 searching1597 scanning1863 1863 ‘G. Eliot’ Romola I. iii. 53 When his eyes fell again they glanced round with a scanning coolness. 1881 E. F. Poynter Among the Hills I. 196 She hated to meet her neighbours and feel their scanning glances. 2. Pathology. Epithet applied to a measured manner of speaking or utterance, with more or less regular pauses, characteristic of certain nervous diseases. ΘΚΠ the mind > language > speech > defective or inarticulate speech > [adjective] > specific disorders tongue-tied1530 scanning1881 word-deaf1883 word-blind1888 paragraphic1899 paraphasic1899 adenoidal1908 telegraphic1916 adenoidy1926 paragrammatic1956 logorrhœic1960 paragrammatical1962 logorrhœtic1965 1881 A. Flint Treat. Princ. Med. (ed. 5) 740 The patient speaks in a slow, monotonous manner, with intervals between syllables, as in scanning. The peculiarity is known as the ‘scanning speech’. 1899 T. C. Allbutt et al. Syst. Med. VII. 58 A peculiar defect of speech described as a scanning utterance. 1899 T. C. Allbutt et al. Syst. Med. VII. 382. Derivatives ˈscanningly adv. ΘΚΠ the mind > attention and judgement > enquiry > investigation, inspection > close examination, scrutiny > [adverb] narrowlyeOE closely1509 searchingly1574 close1642 pressly1642 scrutinously1650 minutely1690 scrutinizingly1828 probingly1876 scanningly1876 vivisectionally1899 1876 ‘G. Eliot’ Daniel Deronda II. iv. xxxiv. 354 Jacob looked up into his face scanningly for a moment or two. 1884 E. Fawcett Rutherford ix. 96 He looked down for a moment scanningly at..his delicate filbert-shaped nails. This entry has not yet been fully updated (first published 1910; most recently modified version published online June 2018). < n.c1440adj.1863
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scanningn.

Compounds

scanningadj.

Derivatives