I would like to teach an elementary colorimetry class at our local photography club meeting. Toward this end I want to demonstrate the "flicker photometry" experiment using a pc/projector. The technique is one used to measure the eye's relative sensitivity to different colors, by alternating two different narrow spectrum colors projected into the same area at a frequency of approximately 17 hz. The colors will blend to create a third color, but if the perceived "brightness" of each color is different then a flicker will be apparent. One color is projected at a fixed intensity, and the observer varies the amplitude of the other color until no flicker appears. In theory one can "hop" across the visible spectrum and derive the human eye photopic luminosity function.
I'm not looking for anything accurate, just trying to get the concept across. Anybody have an idea how to alternate two layers in Photoshop using a script, or whatever, to demonstrate? I searched for an app, there are plenty with RGB sliders to synthesize different colors, but nothing I found could be adapted for "flickering".
Richard Southworth