Optotronics +150mW Video

Ok well I put together a short simple video using my computers built in webcam, not the highest quality but it is all I have. Go to http://www.youtube.com/watch?v=tKSZnLpVbHo
to watch.

-Todd

Great stuff Emc2, thanks for putting it up.

That was a dark room with smoke. I request again a video of the laser in normal conditions. (not under sun ofc, but an illuminated room).

Hallucynogenyc said:

That was a dark room with smoke. I request again a video of the laser in normal conditions. (not under sun ofc, but an illuminated room).

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That room was my photography studio and it was lit with the lightins kit that is on the ceiling fan. After you made your first/origial request I realized I had this webcam on this laptop. It is not a very good camera but it is all I have. I'll get one for you in a different room....you want normal conditions right? No smoke etc.?

-Todd

nice video... but the wall is dark... so i cant understand how shining is the dot ahaha in this video it seems about a 50mw....in brightness on the wall.. or i am wrong? the divergence now seems good

Emc2 said:

That room was my photography studio and it was lit with the lightins kit that is on the ceiling fan. After you made your first/origial request I realized I had this webcam on this laptop. It is not a very good camera but it is all I have. I'll get one for you in a different room....you want normal conditions right? No smoke etc.?

-Todd

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Yeah, just go in a normal room with normal ilumination and shine it around with no smoke.

Hallucynogenyc said:

Yeah, just go in a normal room with normal ilumination and shine it around with no smoke.

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Hi Hallucynogenyc,
What's the point?
The dynamic range of any video or digital camera is much less than the dynamic range of the human eye, so if a picture or video is desired that looks close to what is seen in real life, then lighting, f-stop and shutter speed need to be adjusted to do that.

If you're trying to get an idea of visible beam brightness, remember that beam visibility is dependent on the particles that are floating in the air. The cleaner the air is, the less visible the beam. This is because what you see when you see the beam itself is actual the light that is reflected off of the particles in the air; for instance if you were in an electronics manufacturing clean room, you could turn off all the lights to make the room pitch dark, turn on a 1000mw laser and you would see the beam at all except for the beam spot made on the wall, on the other hand if you are in a fog or smoky room with tons of particles floating around, then even 5 or 10mw will give a visible beam. So all you find out by examining the visible beam is how much stuff is floating around in the air, of course if two lasers are being shown side by side at the same time you can make a relative comarison between them.

realista said:

nice video... but the wall is dark... so i cant understand how shining is the dot ahaha in this video it seems about a 50mw....in brightness on the wall.. or i am wrong? the divergence now seems good

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Hi, I don't understand the point of your question. The laser is a true +150mW and it is very bright. The dark background was used to help with beam visibility since I am using a low quality camera.

-Todd