Black VS White Drive

Plextor and Benq advices to get DVD recorders with black tray to minimise internal reflections of the laser…to minimize jitters and reduce C1 error rates. Is it true? Is this just marketing or has it a real life use?
Thanks.

It would be great if someone could make a comparison with different colour drives…black and white (or silver) drives.
Obviously the test has to be made with the same media and exactly same data burned.

Ive heard that the black tray myth is just that; a myth, and BS.

I’ve never heard about this .
Any way I like Black tray and faceplates drives

greg, good point. I think the same. :wink:

The Benq link.
http://www.benq-eu.com/news/index.cfm?year=2003&id=500

For the Plextor…(it’s a PDF of the PX-760A…read under “Silent Mode”)
http://www.plextor.com/english/products/pdfs/PX760A%20DS.pdf

the logic behind having a black tray makes sense to me. i can see how stray light might affect jitter.

Marketing BS .

In any case, the point is moot. Quote from ZDnet review:

“Although the black may well cut down internal reflections, we’re sceptical as to whether this will actually affect the quality of recordings to any great degree. Jitter only represents a problem when you’re relying on the drive to provide a real-time stream of data. The reality is that DVD movie player software reads the disc faster than real time and buffers a certain amount of data, which eliminates any problems jitter might cause.”

Thanks for the info chas0039. :slight_smile:

Depending on the composition, there may be other advantages to a black tray…

If the black is carbon-loaded and conductive, it could disperse static, while black also allows the use of additives which would discolour lighter coloured plastic.

The light reflection issue does seem to be pure BS, as ther cannot be much emission which would leave the laser, bounce to the point where it reflects or disperses from the tray, then manages to re-enter the optical path.

well then i suppose it must just be magic that the scan results are so close :wink:

Hm, everything could be possible.

I personally trust in facts. :wink:

:iagree:

May not be myth, the A-Open 52x32x52 cdrw drive I fitted while back in a customers PC was white but inside of tray was black, and I do remember reading about it years ago about it reflecting laser less than a white tray.

White tray??

Don’t they are mostly beige?
So a silver one would be bad then.

Black all the way :bigsmile:

Some manufacturers may come up with a “mirror” tray and say BS about perfect burns .

By white I meant pc normal colour, be it white or beige or buff, OK ?
Topic said white anyhow.

I found these documents that do not come from optical drive sources and support the dark tray and interior theory. I am not saying that its enough to make one drive more efficient than the other but I do say that the theory is not B.S.

Difuse reflection I note that the surface of the plastic material on the interior of my Nec tray is granular this will helps difuse light greatly in all directions :slight_smile: Read more on Difuse reflection below.

Diffuse reflection

When light strikes a rough or granular surface, it bounces off in all directions due to the microscopic irregularities of the interface. Thus, an image is not formed. This is called diffuse reflection. The exact form of the reflection depends on the structure of the surface. One common model for diffuse reflection is Lambertian reflectance, in which the light is reflected with equal luminance in all directions, as defined by Lambert’s cosine law.

Para-reflections lighter colours such as white reflect more light this is a common knowledge in the motor vehicle world, white cars will stay cooler in the summmer time more so than black cars the painted surface on a black car will heat very quickly. So consequintialy the black car is obsorbing more light and reflecting less.

Read more on Para-reflections below

If you do not have a pdf reader get

Foxit only 1.3MB
http://www.dartmouth.edu/~rasoren/papers/Para-reflections.pdf

More interesting light reading light docs :slight_smile:

http://www.reflectivelyyours.com/generic149.html

http://www.guam.net/planet/bubble.html

Thanks MOD.IT for the info and the links.
It’s really appreciated. Even if it could not have a real practical use, it’s interesting to know the theory behind this fact.