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Machina Dynamica New Dark Matter CD and Blu Ray tray treatment?

This is a set of adhesive-backed thin plastic pieces that one attaches to one’s transport or player disc tray. The disk rests on them during non-spin mode, but presumably don’t touch the applied thin pieces during playback mode. The company says the new Dark Matter pieces reduces background scattered light from reaching the photodetector, thereby improving performance. 

Anyone tried this product? Please specify transport or player if you have and your impressions. 
128x128celander
celander's avatar
celander OP
1,503 posts
 
Since blu-ray players use 405 nm lasers, lemon yellow should take out the invisible and visible light in that range.
geoffkait's avatar
geoffkait
23,365 posts
 
Uh, oh, partial credit alert! 🚨

Yellow will only absorb violet light. Complementary colors only apply to visible colors. That’s kind of the whole problem. There are no complementary colors for invisible light.

See if you can guess what will absorb both the visible violet scattered light and the invisible scattered light in that general vicinity. 
celander's avatar
celander OP
1,503 posts
 
Well, some combination of yellow mixed with an organic compound that absorbs UV light bandwidths. There are plenty of organic dyes that absorb in that region (UV). I used to work with them in Advanced Photochemistry Research as an undergraduate.   
geoffkait's avatar
geoffkait
23,365 posts
 
Hint: the invisible light in the vicinity of 405 nm is ultraviolet. I.e., below 400 nm. A color is visible light by definition.

Answer - New Dark Matter! Horray! 🤗
celander's avatar
celander OP
1,503 posts
 
Phytochromes have nearly perfect absorption characteristics for absorbing both Violet/UV and Red/IR bandwidths. The lambda max is substantially greater in the Red/IR region than that in the Violet/UV region.
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