Color contrast sensitivity measuring device

Details Color contrast sensitivity measuring device Color contrast sensitivity measuring device

1980-01-07

1981-03-17

Corbin, John K.

Optics: image projectors

Plural projection paths with single light source

350159, 350407, 353 20, 353 84, 353121, 355 37, 355 71, 356403, 356420, G02B 2718, G02B 2728, G03B 2772, G03B 2100

Patent

active

042563682

ABSTRACT:
An apparatus for generating patterned images which are variable in color contrast and spatial frequency while retaining a substantially constant, uniform level of photometric luminance. Two broad spectrum beams of luminous energy are individually projected through two orthogonally oriented polarizers and interleaved upon being split. The intensity in one beam is homogeneous while the other contains a spatially periodic pattern. The two beams created by splitting and interleaving are selectively color filtered and combined after one is translated sufficiently to reverse its phase relative to the other. A rotating polarizer in the path of the output combined beam alters the pattern color composition between one extreme where the spatially reversing colors are defined by the color filters and the opposite extreme in which the pattern disappears into a uniform composition of the two colors.

REFERENCES:
patent: 2123743 (1938-07-01), Pratt
patent: 3498705 (1970-03-01), Dove et al.
Valberg, A., "A Visual Tristimulus Projection Colorimeter", Applied Optics, 1-1971, pp. 8-13. _

Affiliated with

Also associated with

Rating

Color contrast sensitivity measuring device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Color contrast sensitivity measuring device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color contrast sensitivity measuring device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1643055