What's the deal with coloring CD's and/or tray mechanism

As I explained earlier - spilled light would appear as mostly red but it shows as white (no red at all), because all camera sensors can see infrared and filters are not able to filter it completely. If you cannot understand it I cannot help it. Also LED transmitters have narrow band, like this one: http://www.vishay.com/docs/81009/tsal6100.pdf

As you can see there is no light emitted below 840nm (Fig. 8) while visible light ends at 750nm. If you compare two cameras one with the film and another with digital sensor set to the same sensitivity you’ll find that infrared won’t be visible on the picture made with film camera but will show as white light on the one with digital sensor. It is not because of "spilled" light but because digital sensor is sensitive to infrared and film isn’t. I’m not sure if your understanding of this is as poor as one of the class D amps, but it is getting close. No sense to discuss it any further.

kijanki
"As I explained earlier - spilled light would appear as mostly red but it shows as white (no red at all), because all camera sensors can see infrared and filters are not able to filter it completely. If you cannot understand it I cannot help it. Also LED transmitters have narrow band, like this one: http://www.vishay.com/docs/81009/tsal6100.pdf

As you can see there is no light emitted below 840nm (Fig. 8) while visible light ends at 750nm. If you compare two cameras one with the film and another with digital sensor set to the same sensitivity you’ll find that infrared won’t be visible on the picture made with film camera but will show as white light on the one with digital sensor. It is not because of "spilled" light but because digital sensor is sensitive to infrared and film isn’t. I’m not sure if your understanding of this is as poor as one of the class D amps, but it is getting close. No sense to discuss it any further."

We are not on the same page. Not even close. I define infrared light as above 700 nm. Therefore if there is red in the CD laser light it MUST be because the 760 nm nominal wavelength is NOT monochromatic. It has SOME RED light in it. And that RED LIGHT has wavelenths BELOW 700 nm since that is where visible light ENDS. This conversation can serve no purpose anymore.

Exactly - don't waste your time - or money.

People who do not understand electronics or physics can be convinced to believe it works, just as snake oil was sold to people decades ago.

randy-11
Exactly - don’t waste your time - or money.

People who do not understand electronics or physics can be convinced to believe it works, just as snake oil was sold to people decades ago.

Hey, mods! Randy’s stalking me again. Deep six this Druid.

No matter what the wavelength of the laser used in cd players, wouldn’t any scattered light picked up by the photodiodes be miniscule compared to the direct reflection that the photodiodes read and wouldn’t any halfway well designed cd player be able to ignore the miniscule amounts of scattered light and only send on to the DAC 1s and 0s read from directly reflected light?