Click here if you are having trouble logging into the forums
Privacy Policy |
Please read our Terms
of Service | Signup and
Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User
GlennLeDrew
professor emeritus
Reged: 06/18/08
Posts: 620
Loc: Ottawa, Ontario, Canada
|
Re: Mirror Source
06/21/08 09:31 PM
|
|
|
Paul,
All mirrors cause a wavefront error double that of its surface deformations. And yes, that applies to the single reflection, because the light is being "folded" back on itself.
Imagine a perfectly flat mirror with a bump 1 wavelength high. Light approaching the mirror will reach the top of the bump first and be reflected back while the adjacent light is still on its journey toward the rest of the mirror. By the time these adjacent light packets reach the surface, the light that struck the bump will already be 1 wavelength above the bump, or 2 wavelengths above the rest of the mirror, when the adjacent light is just beginning its reflection. So you can see how a mirror's surface deformations are doubled. A sketch will help to see this.
I'm not sure what you meant with your last question, but hopefully it's answered been here.
--------------------
Home-made 11X50 right angle bino, 8.1 deg. FOV
Modified 26X100 bino, 3.5 deg. FOV
Mediocre minds discuss people. Good minds discuss events. Great minds discuss ideas.
|
|
7 registered and 21 anonymous users are browsing this forum.
Moderator: EdZ
|
Forum Permissions
You cannot start new topics
You cannot reply to topics
HTML is disabled
UBBCode is enabled
|
Rating:
Thread views: 752
|
|
|
|
|
|
|
Previous
Index
Next
Flat
Edit
Reply
Quote
