Patent ID: 8797411
Filing Date: 2014-08-05
Classification: G01J,H04N

Abstract:
1. An apparatus for use in evaluating and adjusting the color and tonal reproduction of electronic imaging systems and comprising; an externally front illuminated precision reference test pattern panel, said pattern including grayscale, and black and white reference patches, and at least one mid-saturation color patch; a front light source in front of the test pattern panel, illuminating said test panel; an aperture located centrally in said test pattern panel for transmitting light from the rear to the front of said test pattern panel, a rear light source behind the test pattern panel for emitting colors of exceedingly high saturation close to or beyond that capable of being perceived by human vision, through said aperture in said test pattern panel, whereby said imaging system may receive, simultaneously, both the front illuminated image of said test pattern and light from said rear light source passing through said aperture; light absorbing panels between said rear light source and said aperture for absorbing light from said front light source, to help maintain maximum saturation in the high saturation colors by restricting said front light directed at the front-lit grayscale and color patches of the test pattern from reaching the highly saturated rear light source; a light diffuser and a space between said light absorbing panels and said diffuser; and, a black panel insertable into said space.