field glassn.

Brit.

/ˈfiːld ɡlɑːs/,

/ˈfiːld ɡlas/, U.S.

/ˈfil(d) ˈɡlæs/

Origin: Formed within English, by compounding. Etymons: field n.¹, glass n.¹

Etymology: < field n.¹ + glass n.¹

1. Originally: a small telescope for use outdoors (cf. glass n.¹ 10b) (now historical). Later: (in plural and less commonly singular) a hand-held optical instrument for viewing distant objects outdoors and having a lens for each eye, so as to give a stereoscopic view; a pair of binoculars.Binocular opera glasses using mirrors (Galilean optics) were devised in the early 19th cent. The use of prisms was first proposed c1854 (cf. Porro prism n.) and they were developed commercially by the firm of Zeiss in the 1890s.

ΘΚΠ

the world > physical sensation > sight and vision > optical instruments > instrument for distant vision > [noun] > telescope

trunk1610

trunk-glass1613

trunk-spectacle1613

telescope1619

tube1651

field glass1782

look-see1925

the world > physical sensation > sight and vision > optical instruments > instrument for distant vision > [noun] > binoculars or field-glasses

prospective glass1616

spectacle telescope1728

field glass1782

race-glass1843

racing glass1854

bird glasses1900

prism binocular1901

prismatic binoculars1905

1782 W. Storer Syllabus 21 These effects mentioned by Mr. Walpole, were then seen through the field glass.

1829 Vandeleur xxii, in Tales Mil. Life II. 25 All the officers of Redmond's corps were now on the top of their hill, with their field-glasses, observing the attack.

1853 Blackwood's Edinb. Mag. Nov. 556/1 Colani answered not, but gazed hard through his field-glass.

1888 Cent. Mag. 36 211/1 A minute examination, with the field-glasses, of all the neighboring mountain.

1906 S. V. Henkels Unequaled Coll. Engraved Portraits of Washington 113 His Ex^cy George Washington Esq^r... Full length in uniform and cocked hat, a field-glass in the extended right hand... From ‘An Impartial History of the War in America’. Boston 1781–82.

1910 J. Frankau Let Roof fall In i. 13 The little group who had been watching the race through their field-glasses shut them up.

1942 C. Beaton Diary in Self Portrait with Friends (1979) xii. 99 During a patrol through all the hours of daylight, he must watch the enemy through field-glasses.

1998 Sci. Amer. Aug. 6/2 Three principal defects of the ordinary field glass are overcome by the use of two pairs of prisms.

2001 R. Nicoll White Male Heart (2002) 110 Hugh raised his field-glasses and saw an eagle hunched at the centre of the complaining crowd.

2. = field lens n. at field n.¹ Compounds 5. Contrasted with eyeglass n. 3a. Now rare.

ΘΚΠ

the world > physical sensation > sight and vision > optical instruments > lens > [noun] > eye-piece

eyeglass1665

ocular1702

eyepiece1729

Ramsden1787

field glass1797

negative eyepiece1831

positive eyepiece1842

Kellner1865

orthoscopic1868

eye-point1875

comparison eyepiece1940

1797 Encycl. Brit. XVIII. 364/1 It is evident at first sight that this telescope may be improved, by substituting for the eye-glass..the Huyghenian double eye-glass, or field-glass and eye-glass.

1807 T. Young Course Lect. Nat. Philos. I. xxxvi. 430 A field glass is, therefore, usually placed, both in telescopes, and in the common compound microscope, a little nearer to the object glass than the place of the first image.

1839 W. H. C. Bartlett Elem. Treat. Optics 155 This explains why, when single lenses only were used as field glasses, they were of such enormous focal length.

1918 A. C. Stokes Aquatic Microsc. (ed. 4) i. 18 The lens nearest the observer's eye, when the instrument is in use, is the ‘eye-glass’; the one at the opposite extremity is the ‘field-glass’.

This entry has been updated (OED Third Edition, June 2011; most recently modified version published online March 2022).

单词	field glass
释义	field glassn. Brit. /ˈfiːld ɡlɑːs/, /ˈfiːld ɡlas/, U.S. /ˈfil(d) ˈɡlæs/ Origin: Formed within English, by compounding. Etymons: field n.¹, glass n.¹ Etymology: < field n.¹ + glass n.¹ 1. Originally: a small telescope for use outdoors (cf. glass n.¹ 10b) (now historical). Later: (in plural and less commonly singular) a hand-held optical instrument for viewing distant objects outdoors and having a lens for each eye, so as to give a stereoscopic view; a pair of binoculars.Binocular opera glasses using mirrors (Galilean optics) were devised in the early 19th cent. The use of prisms was first proposed c1854 (cf. Porro prism n.) and they were developed commercially by the firm of Zeiss in the 1890s. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > instrument for distant vision > [noun] > telescope trunk1610 trunk-glass1613 trunk-spectacle1613 telescope1619 tube1651 field glass1782 look-see1925 the world > physical sensation > sight and vision > optical instruments > instrument for distant vision > [noun] > binoculars or field-glasses prospective glass1616 spectacle telescope1728 field glass1782 race-glass1843 racing glass1854 bird glasses1900 prism binocular1901 prismatic binoculars1905 1782 W. Storer Syllabus 21 These effects mentioned by Mr. Walpole, were then seen through the field glass. 1829 Vandeleur xxii, in Tales Mil. Life II. 25 All the officers of Redmond's corps were now on the top of their hill, with their field-glasses, observing the attack. 1853 Blackwood's Edinb. Mag. Nov. 556/1 Colani answered not, but gazed hard through his field-glass. 1888 Cent. Mag. 36 211/1 A minute examination, with the field-glasses, of all the neighboring mountain. 1906 S. V. Henkels Unequaled Coll. Engraved Portraits of Washington 113 His Ex^cy George Washington Esq^r... Full length in uniform and cocked hat, a field-glass in the extended right hand... From ‘An Impartial History of the War in America’. Boston 1781–82. 1910 J. Frankau Let Roof fall In i. 13 The little group who had been watching the race through their field-glasses shut them up. 1942 C. Beaton Diary in Self Portrait with Friends (1979) xii. 99 During a patrol through all the hours of daylight, he must watch the enemy through field-glasses. 1998 Sci. Amer. Aug. 6/2 Three principal defects of the ordinary field glass are overcome by the use of two pairs of prisms. 2001 R. Nicoll White Male Heart (2002) 110 Hugh raised his field-glasses and saw an eagle hunched at the centre of the complaining crowd. 2. = field lens n. at field n.¹ Compounds 5. Contrasted with eyeglass n. 3a. Now rare. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > lens > [noun] > eye-piece eyeglass1665 ocular1702 eyepiece1729 Ramsden1787 field glass1797 negative eyepiece1831 positive eyepiece1842 Kellner1865 orthoscopic1868 eye-point1875 comparison eyepiece1940 1797 Encycl. Brit. XVIII. 364/1 It is evident at first sight that this telescope may be improved, by substituting for the eye-glass..the Huyghenian double eye-glass, or field-glass and eye-glass. 1807 T. Young Course Lect. Nat. Philos. I. xxxvi. 430 A field glass is, therefore, usually placed, both in telescopes, and in the common compound microscope, a little nearer to the object glass than the place of the first image. 1839 W. H. C. Bartlett Elem. Treat. Optics 155 This explains why, when single lenses only were used as field glasses, they were of such enormous focal length. 1918 A. C. Stokes Aquatic Microsc. (ed. 4) i. 18 The lens nearest the observer's eye, when the instrument is in use, is the ‘eye-glass’; the one at the opposite extremity is the ‘field-glass’. This entry has been updated (OED Third Edition, June 2011; most recently modified version published online March 2022). < n.1782
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