Affordable Red Laser Beam: Tips and Recommendations for Straight Light

  • Thread starter Thread starter MythioS
  • Start date Start date
  • Tags Tags
    Laser Lighting
Click For Summary

Discussion Overview

The discussion revolves around finding affordable options for a straight red laser beam, including inquiries about technology and visibility of the beam. Participants explore various types of laser pointers and alternative methods to achieve visible laser effects, with a focus on practical applications and recommendations.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant expresses curiosity about affordable options for a straight red laser beam, noting a preference for smaller laser generators.
  • Another participant recalls that red laser pointers were once common and suggests they should still be available and potentially cheaper.
  • A humorous remark is made about the cost of curved laser beams compared to straight ones.
  • Concerns are raised about the visibility of red laser beams, with one participant noting that red lasers typically only show a dot at the end rather than the beam itself.
  • A technical explanation is provided regarding the scattering of red light in air, indicating that a mist or fog is needed to make the beam visible, unlike green lasers which scatter more effectively.
  • One participant suggests exploring non-official laser alternatives that could produce a similar straight line effect.

Areas of Agreement / Disagreement

Participants have differing views on the availability and visibility of red laser beams, with some suggesting they should be easy to find while others highlight the limitations in seeing the beam itself without additional conditions.

Contextual Notes

There are unresolved assumptions regarding the technology behind laser pointers and the conditions necessary for visibility of laser beams, particularly in relation to environmental factors like air quality and scattering.

Who May Find This Useful

Individuals interested in laser technology, hobbyists looking for affordable laser options, and those working on projects requiring visible laser beams may find this discussion relevant.

MythioS
Messages
50
Reaction score
0
Hope this is an apropriate thread to be asking this.. but I am curious if anyone knows a cheap way to get a straight red laser beam?

I found this green laser pen on the net and it has a fluid light from source to point but they say the red ones simply don't have the technology or something...

the smaller the laser generator or what not the better, which is why i ended up searching the pen ones.

Thanks
 
Engineering news on Phys.org
Just a few years ago all laser pointers were red. I would be surprised if you can't get them anymore. If anything, they should be cheaper.

Njorl
 
straight red laser beam

Its a good thing your looking for a straight red laser beam , those curved ones aren't cheep.
 
ive been seeing pen lights in red but they only show the dot at the end of the beam. I am looking for something that will show the beam itself.
 
Air does not effectively scatter red light, so no red laser will "show its beam" in air. You'd need to put some mist or dust or fog in the way to scatter the beam and make it visible.

Green laser light, on the other hand, is scattered by air -- though only slightly -- so you can see the beam. However, in an enclosure about the size of a room, there's not enough scattering to see the beam of a green laser either. You need about a kilometer of air and a dark night to be able to see a green laser's beam. They work great for pointing out stars to people, for example.

If this is for a science project or something on a table-top, the best way to make a laser's beam visible is simply to use one of those party-fog machines.

- Warren
 
Well it doesn't necessarily have to be an official laser. of there were a way to produce the same effect? I am not sure of a light that would emit such a straight line but perhaps someone else does
 

Similar threads

  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 25 ·
Replies
25
Views
5K
  • · Replies 6 ·
Replies
6
Views
4K
  • · Replies 21 ·
Replies
21
Views
16K
  • · Replies 14 ·
Replies
14
Views
3K
  • · Replies 59 ·
2
Replies
59
Views
13K
  • · Replies 3 ·
Replies
3
Views
10K
  • · Replies 10 ·
Replies
10
Views
3K
  • · Replies 30 ·
2
Replies
30
Views
7K
  • · Replies 5 ·
Replies
5
Views
3K