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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
mapman's avatar
mapman
22,464 posts
 
Could be.  

I just took it though.   See ya.   Your remaining captive audience of 1 awaits.....
geoffkait's avatar
geoffkait
23,365 posts
 
Moops, better check the bottle. The expiration date must have expired.
celander's avatar
celander OP
1,503 posts
 
Thanks, mapman!  I am back!!
celander's avatar
celander OP
1,503 posts
 
04-04-2019 9:02pmGeoff wrote:

"When the laser beam is over a “land” the full reflected signal is registered by the photodetector for that short period of time."

Are you certain about that claim, professor? What if it is only 1/3 of the reflected signal? What happens to the remainder 2/3 of the reflected signal?
geoffkait's avatar
geoffkait
23,365 posts
 
There is a threshold for detection. Light signals less than 75% full reflected power will not be detected. This is very good news because it means we don’t have to completely eliminate the background scattered light, just reduce it sufficiently in intensity. Think if the inside of the transport compartment like a light bulb lit up by scattered light. You just want to turn the brightness down a bit.
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