Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Chromaticity Sensibility to Wave-Length Difference as a Function of Purity

Not Accessible

Your library or personal account may give you access

Abstract

Using apparatus designed by Priest and Gibson, the writer has determined sensibility to wave-length difference for his right eye: (1) For stimuli of unit purity (spectral light) from 450 to 645 mμ. (2) For stimuli consisting of artificial noon sunlight plus homogeneous light of some selected wave-length, the wave-lengths being 455, 470, 481.5, 493, 530, 580, 635 mμ, and the purities ranging from unity to a few percent. (3) For stimuli consisting of homogeneous light of wave-length 455 plus some one of heterogeneous stimuli specified as follows: (a) equal energy, (b) color temperature 2570°K, (c) color temperature over 24,000°K. (4) For a stimulus consisting of homogeneous light of wave-length 530 mμ plus heterogeneous light of color temperature over 24,000°K. The results of (1) are concordant with previous determinations by others. The least perceptible difference (LPD) in wave-length for (2) shows, for wave-lengths 635, 580, 530 and 493 mμ at first a slow and then, near zero purity, a rapid increase as purity is decreased. For wave-length 455 mμ with decreasing purity, the LPD at first increases and then decreases to a pronounced minimum at about fifteen percent purity, increasing rapidly beyond this. Wave-lengths 470 and 481.5 mμ show a similar but less marked effect. The experiments noted under (3) and (4) were undertaken in order to study the effect of the spectral distribution of the heterogeneous stimulus in modifying the peculiar results just described for wave-lengths less than 482 mμ. It is shown that the form of the curve showing LPD as a function of purity depends upon the spectral distribution of the heterogeneous stimulus. Two hypotheses are proposed to account for the peculiar results for short wave-lengths.

© 1933 Optical Society of America

Full Article  |  PDF Article
More Like This
CHROMATICITY SENSIBILITY TO STIMULUS DIFFERENCES

DEANE B. JUDD
J. Opt. Soc. Am. 22(2) 72-72 (1932)

Sensibility to Color-Temperature Change as a Function of Temperature*

Deane B. Judd
J. Opt. Soc. Am. 23(1) 7-14 (1933)

The Minimum Perceptible Colorimetric Purity as a Function of Dominant Wave-Length*

Irwin G. Priest and F. G. Brickwedde
J. Opt. Soc. Am. 28(5) 133-139 (1938)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved