Please identify pictures

  • Thread starter SF
  • Start date
  • #1
SF

Main Question or Discussion Point

I was playing with a laser pointer and a concave mirror and I managed to get a 5mm beam to spread over a 30cm area.
http://img361.imageshack.us/img361/1884/mspaintfg0.png [Broken]
http://img228.imageshack.us/img228/1866/lpuc9.jpg [Broken]
http://img228.imageshack.us/img228/3581/lp0ii9.jpg [Broken]

The irregular pattern remained stationary even when I moved the beam, so I guess it's due to (a) irregularities in the mirror or (b) impurities in the laser's lens?
 
Last edited by a moderator:

Answers and Replies

  • #2
11
0
I expect you are talking about a speckle pattern... Look up laser speckle in Wikipedia...
 

Related Threads for: Please identify pictures

Replies
3
Views
588
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
12
Views
2K
  • Last Post
Replies
21
Views
3K
  • Last Post
Replies
10
Views
2K
  • Last Post
2
Replies
29
Views
2K
  • Last Post
Replies
6
Views
2K
  • Last Post
15
Replies
350
Views
21K
Top