fleschler, the NEW DARK MATTER comes in 10 very thin plastic squares approximately 3/4 inch per side plus double-sided tape for applying the squares to the circular area of the top surface of the tray. The idea is to cover most of the area the CD sits on when you place it on the tray. For some trays the squares can be trimmed to fit. If there is a smaller circular tray for Mini discs NDM can be applied to that area, too. It’s not necessary to completely cover the tray with NDM. 75% - 80% coverage is recommended. Even less will be very audible as I was informed by a customer yesterday. The reason I say NDM is a breakthrough product is it’s the first audio product to absorb ALL scattered laser light, the red portion 25% and the invisible portion 75%. It’s the invisible portion, by far the largest portion, that is the most difficult to eliminate since it’s not amenable to absorption by colors. My previous version of Dark Matter was a spray that absorbed infrared scattered light.
I estimate the effective bandwidth of the 780 nm CD laser to be approx. 650-900 nm. All of which can get into the photodetector. The nominal laser wavelength of 780 nm is in the invisible portion of the light spectrum.
The thin plastic squares are not adhesive themselves. Thus double-sided tape is necessary to attach them to the tray. The smooth UNSTICKY side of NDM is all that’s exposed. It’s not really rocket science. 🚀
The CD does not (rpt not) spin on the CD tray per se. The CD contacts the tray only initially when you place the CD on the tray. There must be a spindle, no?
I estimate the effective bandwidth of the 780 nm CD laser to be approx. 650-900 nm. All of which can get into the photodetector. The nominal laser wavelength of 780 nm is in the invisible portion of the light spectrum.
The thin plastic squares are not adhesive themselves. Thus double-sided tape is necessary to attach them to the tray. The smooth UNSTICKY side of NDM is all that’s exposed. It’s not really rocket science. 🚀
The CD does not (rpt not) spin on the CD tray per se. The CD contacts the tray only initially when you place the CD on the tray. There must be a spindle, no?