isochromaticadj.n.

/ˌʌɪsəʊkrəʊˈmatɪk/

Etymology: < iso- comb. form + chromatic adj. and n.; in modern French isochromatique (Littré).

A. adj.

1. Optics. Of a single colour or tint: applied to a fringe in an interference pattern obtained with birefringent material, such as a biaxial crystal or material used in photoelastic experiments (when such a fringe corresponds to points where the difference between the principal stresses is the same). Also, representing or depicting such fringes.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > light > diffraction > [adjective] > connected with interference

isochromatic1829

interferential1880

photoelastic1911

speckle-interferometric1973

the world > matter > physics > mechanics > force > stress or force exerted and tending to deform > [adjective] > specific systems of stress analysis

photoelastic1911

isochromatic1931

1829 Nat. Philos. (Libr. Useful Knowl.) I. Polaris. Light vii. 24 A more accurate description of the form of these isochromatic curves, or lines of equal tint.

1837 W. Whewell Hist. Inductive Sci. II. 387 They give oval and knotted isochromatic lines.

1855 D. Brewster Mem. Life I. Newton (new ed.) I. vii. 174 Owing to the curvature of the surfaces..the forms of the isochromatic lines, or the lines of equal tint, are various and beautiful.

1931 E. G. Coker & L. N. G. Filon Treat. Photo-elasticity iii. 248 The integrated tint remains the same over the whole of this locus, and it is for this reason that such lines are called lines of equal tint or isochromatic lines.

1932 A. C. Hardy & F. H. Perrin Princ. Optics xxix. 617 Although the values of p and q themselves can be computed from the isoclinic and isochromatic patterns, the operations are extremely tedious.

1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) X. 150/1 Utilizing equations for the difference of the principal stresses from the isochromatic fringe orders, the stresses may be found by solving the two equations for the two principal stresses.

2. Photography. = orthochromatic adj.

ΘΚΠ

society > leisure > the arts > visual arts > photography > [adjective] > colour

heliochromic1855

photochromatic1856

isochromatic1884

photo-trichromatic1896

colour1898

Lippmann1902

panchromatic1903

Lumière1907

lenticular1936

1884 Philadelphia Photographer Oct. 315/1 (heading) Isochromatic gelatin plates.

1885 Jrnl. Franklin Inst. 119 368 It was..the only truly isochromatic process ever discovered. Dr. Vogel's new process was not only no better in any respect, but the plates were insensitive to scarlet and ruby-red.

1885 Jrnl. Franklin Inst. 119 371 Truly isochromatic photography.

1903 A. M. Clerke Probl. Astrophysics ii. iii. 191 D appeared conspicuously on Professor Campbell's isochromatic plates.

1904 Westm. Gaz. 19 Nov. 16/2 Not much has been heard of late about isochromatic plates, and it is to be feared that among amateurs their use is not on the increase. Generally speaking, the more recent advances in orthochromatic photography have been in the direction of increasing rather than lessening the difficulties.

1932 Discovery Sept. 292/1 The extension of the sensitivity of photographic emulsions..has given rise to three..types of colour sensitive material. The first type includes materials in which the sensitivity has been extended to cover the green; such materials are generally known as ‘orthochromatic’ or ‘isochromatic’.

1955 H. Gernsheim & A. Gernsheim Hist. Photogr. xxiii. 268 Vogel and others had transformed the hitherto colour-blind emulsion into one which was more accurately sensitive for most colours—i.e. the so-called iso- or orthochromatic plates.

B. n.

An isochromatic fringe or line.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > light > diffraction > [noun] > band, strip

fringe1718

schliere1867

isogyre1902

isochromatic1924

Brewster fringes1934

1924 Rep. Brit. Assoc. Advancem. Sci. 1923 354 The disc carried a network of reference lines and the appearances were projected on a screen, upon which the isoclinics and isochromatics were traced with a pencil.

1948 M. M. Frocht Photoelasticity II. iv. 139 The fringes or isochromatics..all pass through the points of application of the loads.

1958 E. U. Condon & H. Odishaw Handbk. Physics iii. vi. 86/2 With a white light source the stress patterns consists of colored bands, called isochromatics, which form in the order of yellow, red, and green followed by similar cycles.

This entry has not yet been fully updated (first published 1900; most recently modified version published online June 2018).

单词	isochromatic
释义	isochromaticadj.n. /ˌʌɪsəʊkrəʊˈmatɪk/ Etymology: < iso- comb. form + chromatic adj. and n.; in modern French isochromatique (Littré). A. adj. 1. Optics. Of a single colour or tint: applied to a fringe in an interference pattern obtained with birefringent material, such as a biaxial crystal or material used in photoelastic experiments (when such a fringe corresponds to points where the difference between the principal stresses is the same). Also, representing or depicting such fringes. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > diffraction > [adjective] > connected with interference isochromatic1829 interferential1880 photoelastic1911 speckle-interferometric1973 the world > matter > physics > mechanics > force > stress or force exerted and tending to deform > [adjective] > specific systems of stress analysis photoelastic1911 isochromatic1931 1829 Nat. Philos. (Libr. Useful Knowl.) I. Polaris. Light vii. 24 A more accurate description of the form of these isochromatic curves, or lines of equal tint. 1837 W. Whewell Hist. Inductive Sci. II. 387 They give oval and knotted isochromatic lines. 1855 D. Brewster Mem. Life I. Newton (new ed.) I. vii. 174 Owing to the curvature of the surfaces..the forms of the isochromatic lines, or the lines of equal tint, are various and beautiful. 1931 E. G. Coker & L. N. G. Filon Treat. Photo-elasticity iii. 248 The integrated tint remains the same over the whole of this locus, and it is for this reason that such lines are called lines of equal tint or isochromatic lines. 1932 A. C. Hardy & F. H. Perrin Princ. Optics xxix. 617 Although the values of p and q themselves can be computed from the isoclinic and isochromatic patterns, the operations are extremely tedious. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) X. 150/1 Utilizing equations for the difference of the principal stresses from the isochromatic fringe orders, the stresses may be found by solving the two equations for the two principal stresses. 2. Photography. = orthochromatic adj. ΘΚΠ society > leisure > the arts > visual arts > photography > [adjective] > colour heliochromic1855 photochromatic1856 isochromatic1884 photo-trichromatic1896 colour1898 Lippmann1902 panchromatic1903 Lumière1907 lenticular1936 1884 Philadelphia Photographer Oct. 315/1 (heading) Isochromatic gelatin plates. 1885 Jrnl. Franklin Inst. 119 368 It was..the only truly isochromatic process ever discovered. Dr. Vogel's new process was not only no better in any respect, but the plates were insensitive to scarlet and ruby-red. 1885 Jrnl. Franklin Inst. 119 371 Truly isochromatic photography. 1903 A. M. Clerke Probl. Astrophysics ii. iii. 191 D appeared conspicuously on Professor Campbell's isochromatic plates. 1904 Westm. Gaz. 19 Nov. 16/2 Not much has been heard of late about isochromatic plates, and it is to be feared that among amateurs their use is not on the increase. Generally speaking, the more recent advances in orthochromatic photography have been in the direction of increasing rather than lessening the difficulties. 1932 Discovery Sept. 292/1 The extension of the sensitivity of photographic emulsions..has given rise to three..types of colour sensitive material. The first type includes materials in which the sensitivity has been extended to cover the green; such materials are generally known as ‘orthochromatic’ or ‘isochromatic’. 1955 H. Gernsheim & A. Gernsheim Hist. Photogr. xxiii. 268 Vogel and others had transformed the hitherto colour-blind emulsion into one which was more accurately sensitive for most colours—i.e. the so-called iso- or orthochromatic plates. B. n. An isochromatic fringe or line. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > diffraction > [noun] > band, strip fringe1718 schliere1867 isogyre1902 isochromatic1924 Brewster fringes1934 1924 Rep. Brit. Assoc. Advancem. Sci. 1923 354 The disc carried a network of reference lines and the appearances were projected on a screen, upon which the isoclinics and isochromatics were traced with a pencil. 1948 M. M. Frocht Photoelasticity II. iv. 139 The fringes or isochromatics..all pass through the points of application of the loads. 1958 E. U. Condon & H. Odishaw Handbk. Physics iii. vi. 86/2 With a white light source the stress patterns consists of colored bands, called isochromatics, which form in the order of yellow, red, and green followed by similar cycles. This entry has not yet been fully updated (first published 1900; most recently modified version published online June 2018). < adj.n.1829
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