Tom Harvey wrote: If you look in a book on vision you can find spectral sensitivity curves that will show the cones being sensitive to red light at wavelengths where rod sensitivity has fallen to a very low value Brian Skiff added: Evident in these recent papers is ... that dark-adaptation takes quite awhile (one plot shows the two subjects still gaining considerably after 50 minutes in complete darkness), There is a chapter (ch 4) in MIL-HDBK-141 on vision. I extracted a couple of charts from it. One shows the spectral response of the rods and cones. The other shows the dark adaptation time. Links: Spectral response: http://www.azmackes.net/astronomy/vis_curves.gif Adaptation time: http://www/azmackes.net/astronomy/vis_time.gif MIL-HDBK-141: http://www/azmackes.net/astronomy/mil_hdbk_141 Enjoy! Joe -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.
