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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. 
celander
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
1,504 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
1,504 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.
geoffkait's avatar
geoffkait
23,365 posts
 
The violet / UV sensitive stuff is not phytochromes.

”Phytochromes are a class of photoreceptor in plants, bacteria and fungi use to detect light. They are sensitive to light in the red and far-red region of the visible spectrum and can be classed as either Type I, which are activated by far-red light, or Type II that are activated by red light.[2] 

Other plant photoreceptors include cryptochromes and phototropins, which respond to blueand ultraviolet-A light and UVR8, which is sensitive to ultraviolet-B light.“
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