单词 | raster |
释义 | † rastern.1 Obsolete. Shaving. Only in raster cloth, raster house. ΘΚΠ the mind > attention and judgement > beautification > beautification of the person > beautification of the hair > barbers and hairdressers > [noun] barberc1330 cutterc1425 clipperc1440 raster cloth1440 poller1578 trimmer1583 dressera1596 shavester1620 razor-chirurgeon1624 suds-monger1638 tonsor1656 hair-man1689 head-dresser1697 friseur1750 hairdresser1771 scraper1791 depilator1836 coiffeur1847 Figaro1864 strap1864 tonsorialist1869 trichotomist1875 nai1883 hair-stylist1935 stylist1937 styler1960 crimper1966 Sweeney1966 scissorsmith2002 Promptorium Parvulorum (Harl. 221) 424 Rastyr [?a1475 Winch. Rasyr] howse, or schavyng howse, barbitondium. c1450 Alphabet of Tales (1904) I. 108 (MED) When þis barbur come to shafe þis gude man, as he was in wetyng of hym he lukid vpon þe raster clathe. ?c1475 Catholicon Anglicum (BL Add. 15562) f. 102 A Raster clothe, ralla. 1483 Catholicon Anglicum (BL Add. 89074) (1881) 300 A Raster [?c1475 BL Add. 15562 Raser] house, barbitondium. This entry has been updated (OED Third Edition, December 2008; most recently modified version published online June 2022). rastern.2 1. Chiefly Electronics. A usually rectangular pattern of parallel lines forming or corresponding to the display of a television screen, computer monitor, etc. Frequently attributive, esp. in raster pattern.A raster almost always corresponds to two orthogonal grids thus forming an image made up of a pattern of dots rather than lines. ΘΚΠ the world > space > relative position > state or position of being parallel > [noun] > pattern of raster1934 1934 L. H. Bedford & O. S. Puckle in Jrnl. Inst. Electr. Engineers 75 64 The path of the spot must, so to speak, be mapped out beforehand into a suitable line raster, which is of such a size and shape as to allow the real image of the spot to explore the whole of one picture. 1940 Jrnl. Royal Aeronaut. Soc. 44 103 It is claimed that the electron Raster microscope overcomes these difficulties. The principle of the microscope is as follows:—A thin electron beam is made to scan the object in a ‘Raster’ as in television. 1952 Electronic Engin. 24 166/1 If a raster composed of horizontal scanning lines is further divided into the appropriate number of vertical lines, each line will become broken up into dots. 1973 Sci. Amer. Oct. 73/1 The spectroheliograms were made by holding the diffraction grating at one angle, so that only a single wavelength fell on the photomultiplier. The solar image was then scanned in a raster pattern to build up a picture of the sun in that one wavelength. 1991 P. M. Mather Computer Applic. in Geogr. 216 Some computer systems use raster graphics which generally have a lower resolution than the more expensive vector graphics. 2006 Pittsburgh (Pa.) Post-Gaz. (Nexis) 11 Nov. a10 These projectors are a far cry from the ones we're used to seeing in conference rooms, which usually have a very visible ‘raster’, or grid pattern of pixels. 2. Film and Photography. A fine grid or screen of wires, slits, or lenticular elements, placed in front of the projection screen in some stereoscopic cinematography systems. Cf. raster screen n. at Compounds. Now rare. ΘΚΠ society > leisure > the arts > performance arts > cinematography > projection > [noun] > screen > grid for stereoscopic effects raster1952 raster screen1965 1952 E. F. Linssen Stereo-photogr. xxi. 292 (caption) Savoye's Cyclostereoscopic system... The cone allows the two beams to pass through many slits..with which it is provided, and these same slits (constituting a revolving grid or raster) also act as selectors for the spectators. 1952 E. F. Linssen Stereo-photogr. xxi. 291 In 1945 B. T. Ivanov wrote on ‘raster-stereoscopy in the cinema’. 1958 Newnes Compl. Amateur Photogr. 235 An alternative method of projection is the Cyclosterscopic system... This system consists of a metal cone of fine grids or rasters which revolves around the screen and is not noticeable in motion. Compounds raster scan n. chiefly Electronics a line by line scan of area by an electron beam or other scanning device to read or produce an image (on a television screen, computer monitor, etc.); an image generated by such a scan. ΚΠ 1950 Electronics 23 107 The h.v. time of rise for the sweep can be achieved by use of either (a) a modified raster scan employing hard valves, or (b) H-filled thyratrons. 1973 Physics Bull. May 275/1 A flying spot performs a raster scan of the whole picture and with the help of a photodetector transforms the entire optical information—spots and all—into the memory of a large online computer. 2002 E. Falkner & D. Morgan Aerial Mapping (ed. 2) vii. 49 Pixels extracted from the raster scan of a photograph could be as small as..1/5000 in. raster scan v. chiefly Electronics transitive. = raster v. ΚΠ 1967 Appl. Physics Lett. 10 227 This was done by sampling the acoustic field with an ordinary microphone which was used to raster scan a plane. 1970 New Scientist 4 June (Suppl.) 7/2 The screen can be ‘raster-scanned’ as on a TV screen (i.e. the light is deflected across the screen in a series of lines gradually moving to the bottom). 2002 J. D. Gibson Communicat. Handbk. (ed. 2) 94-1 A facsimile image is formed when a document is raster scanned by a light sensitive electronic device. raster scanning n. chiefly Electronics the action or process of producing a raster scan; frequently attributive. ΚΠ 1951 Proc. IRE 39 1218 In the method investigated in greatest detail, the raster scanning lines are parallel to the phosphor strips. 1969 D. K. Barton & H. R. Ward Handbk. Radar Measurem. viii. 227 Raster-scanning pencil beams. These radars can be analyzed as search radars or sequential-processing trackers in both angular coordinates. 2001 L. Tetley & D. M. Calcutt Electronic Navigat. Syst. (ed. 3) vii. 238 The United Kingdom Hydrographic Office..started the raster scanning of its Admiralty charts in 1994. raster screen n. (a) Film and Photography = sense 2; (b) Electronics a screen (of a television, computer monitor, etc.) on which a raster image may be displayed. ΘΚΠ society > leisure > the arts > performance arts > cinematography > projection > [noun] > screen > grid for stereoscopic effects raster1952 raster screen1965 1965 Focal Encycl. Photogr. (rev. ed.) II. 1207/1 Raster screens consist of an arrangement of vertical wires interposed between the screen surface and the audience... There are also patented screens in which the projection surface is composed of vertical lenticular prisms, or of spherical lenticular elements graduated in size. 1982 Math. Mag. 55 50 A new algorithm for the hidden surface problem, based on the processing of the projected image on a raster screen. 1983 Computer Weekly 15 Sept. 23/2 Raster screen technology, using the cathode ray tube, has taken over from the direct view storage tube (DVST). 1999 B. Brewster tr. N. Burch Life to those Shadows 7 The ephemeral reappearences of red-and-green polarising spectacles, raster screens, etc. 2002 Electronic Engin. Times (Nexis) 19 Aug. 43 The computer visualization and simulation markets depend on some of the most efficient computer architectures to paint realistic images on raster screens. This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022). rasterv. Chiefly Electronics. transitive. To pass (an electron beam or other scanning device) over an area in a raster pattern. Also: to scan (an area) in this way. ΚΠ 1969 Icarus 11 59/2 By rastering the electron beam over a specimen surface and recording either the X-ray fluorescence or the optical fluorescence signal, an image can be constructed on a synchronized cathode ray tube. 1973 Thin Solid Films 19 46 It is necessary to make the sputtered crater large with respect to the detected area. This can be accomplished by rastering the primary beam. 1998 Rev. Sci. Instruments 69 3622/1 A single crystal silicon wafer was chosen to represent a semiconducting material. The surface was rastered with a diamond tip with a load of 0.8 μN. 2005 J. C. Ion Laser Processing of Engin. Materials xv. 384 The beam may be scanned or rastered over the material using computer controlled mirrors. This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022). < |
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