Understanding laser phenomenon

  • Thread starter Thread starter skeenan
  • Start date Start date
  • Tags Tags
    Laser Phenomenon
AI Thread Summary
The discussion focuses on understanding laser phenomena, particularly how a laser grid operates. A helpful video was shared, demonstrating the movement of light patterns in a laser grid. Participants express interest in recreating the experiment to compare results by having someone walk through the grid. The conversation highlights the importance of visual aids in grasping the concept of grid projections. Overall, the thread emphasizes the need for practical demonstrations to validate observations.
skeenan
Messages
2
Reaction score
0
For some reason, can't delete this thread... thank you, UltrafastPED, the below video was very helpful!
 
Last edited:
Science news on Phys.org
Watch this video on how a laser grid works:
 
Last edited by a moderator:
I will, thank you!

Yes, it does resemble what I'm seeing, as far as the movement of the light pattern. I am hoping to prove it out further, if we can set everything up again and "recreate" it by having someone walk through and compare any differences.

Thank you for pointing me to the video, I had been looking for one that showed what a person would look like moving through the grid.
 
Last edited:
Any grid projection would work ... a bright light in a box and a grid with holes!
 
Thread 'A quartet of epi-illumination methods'

Thread 'A quartet of epi-illumination methods'

Well, it took almost 20 years (!!!), but I finally obtained a set of epi-phase microscope objectives (Zeiss). The principles of epi-phase contrast is nearly identical to transillumination phase contrast, but the phase ring is a 1/8 wave retarder rather than a 1/4 wave retarder (because with epi-illumination, the light passes through the ring twice). This method was popular only for a very short period of time before epi-DIC (differential interference contrast) became widely available. So...
View full post »

Thread 'Effective absorption coefficient of gold nanoparticles'

I am currently undertaking a research internship where I am modelling the heating of silicon wafers with a 515 nm femtosecond laser. In order to increase the absorption of the laser into the oxide layer on top of the wafer it was suggested we use gold nanoparticles. I was tasked with modelling the optical properties of a 5nm gold nanoparticle, in particular the absorption cross section, using COMSOL Multiphysics. My model seems to be getting correct values for the absorption coefficient and...
View full post »

Similar threads

I Laser and nano-holes experiment
Replies
3
Views
2K
A Weird pattern for a laser beam spot
Replies
9
Views
3K
Red laser erases on glow in the dark surfaces?
Replies
14
Views
3K
A Relative efficiency of SHG vs SFG
Replies
6
Views
1K
Moon Experiment: Laser Beam & Telescope for New Moon Phase
Replies
17
Views
3K
Spectrum of laser light absorbed and re-emitted by a white object
Replies
7
Views
2K
A Stimulated emission/absorption - which equations act on external targets?
Replies
2
Views
2K
Does the ruby laser (the first invented laser) have nonlinear behavior?
Replies
5
Views
2K
Question on laser reflection (pic included)
Replies
6
Views
1K
I Need Help Identifying Old Optic Device
Replies
6
Views
2K

Hot Threads

Recent Insights

Back
Top