Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



Laser Pointer Store

Funny Incident / Bad laser diagnosis.

Geneticz

New member
Joined
Jan 23, 2009
Messages
122
Likes
0
Points
0
So, up to today, I have noticed absolutely no mode-hopping with my X-25. Then I pointed it through a window today and the reflected beam happened to flash a foot or two to the left of my head, giving me a clear view of the beam. ( I was wearing my goggles, chill)

I could not help but notice 2 separate beams! Heavens no! I moved the reflected beam to the wall behind me and turned around to see 2 separate dots! What could have possibly have caused this? I nearly contacted Nova after repeating the same thing happened except with fresh batts and a rest for the laser.

Then, I noticed that the glass was double glazed. Yep, it was just the second reflection bouncing back. As soon as I tried with a mirror, all was fine ::)

Had me pretty scared there! ;D
 

Benm

Well-known member
Joined
Aug 16, 2007
Messages
7,998
Likes
663
Points
113
Hehe... interesting that you never noticed that effect before, it is clearly visible usually.

Sometimes you can also see the reflections from the other end of the panes, which are much weaker, but can give you 4 spots for one beam going in.
 

Geneticz

New member
Joined
Jan 23, 2009
Messages
122
Likes
0
Points
0
Doesn't happen with mirrors... I guess I just never paid attention, normally shine with windows open to get strongest beam possible, and avoid dangerous reflections....I did notice the large number of dots on the pane previously, but had never made the connection between that and my lasers "mode-hopping"! :D
 

Switch

New member
Joined
Dec 9, 2007
Messages
3,327
Likes
4
Points
0
It happens with second surface mirrors too.You get the main reflection and two weaker ones, from the glass and from the shiny part reflecting off the glass and back into the shiny part.
 




Top