Re: Flat Black - where, what ??

On Wed, 25 Apr 2007 22:55:38 -0700 (PDT), brian@xxxxxxx (Brian Tung)
wrote:

I'm not Bill, but I'm guessing it's because glossy black reflects little
light (because it's black), and what it does reflect, goes in a very
particular direction, which most of the time is not toward the eyepiece.
Whereas with flat black, which reflects diffusely, light hitting any
place in the tube has some chance of making it into the eyepiece.

It is common to use mirrors as baffles or stray light management tools
in many optical systems, because they are much more efficient at
redirecting unwanted light than the best absorbers.

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com
.