Recent content by Eidetic

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    Vintage Holograms

    I am an aging holographer who's been collecting holograms throughout an nearly 40 year career. I've recently put them all on a website I made to document my collection of old lasers, and thought those who visit here may be interested. Still shakin' trays in the dark, just not as much as I used...
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    Flashlight Pointers

    I'm a collector of lasers, and that activity led me to include laser pointers. Before lasers took over the application however, there were flashlight pointers. Those were the flashlights that project a little line or arrow on the screen as we watched 16mm films in the church basement. Anyway...
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    Vintage Laser Archive

    Just came back to give a little update. The archive has grown to now include almost 400 lasers and about 350 related artifacts. The google site is now accessible to anyone with the link, which is here: https://sites.google.com/site/vintagelaserarchive/ Since this site is primarily intended...
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    Eye protection question

    Re: laser eye protection The best way to protect yourself and others with lasers is to control the beam. Know what's at where it terminates. Know what might cross its path. Don't let anybody put anything into your beam, ever. Don't let anybody else control your laser. An operator wearing...
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    Insane 110wat laser (need help building PSU )`

    There are very few people at LPF who have any experience with this kind of laser. Probably as few as here. They (with an average age at LPF of 18 by their own poll) look at gas lasers about the same way as young people today view vinyl phonograph records. The real experience with this sort of...
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    Insane 110wat laser (need help building PSU )`

    That's a serious laser. What will you be using it for, or pointing it toward, if you get it working?
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    808nm laser or IR flashlight

    UV light does not go into the eye. It damages the cornea and causes cataracts in the lens. It never reaches the retina. Light in the near IR does make it to the retina. It's only the far IR that's does what you mention.
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    Possible eye damage from 1mW laser line?

    The only way I know about for hurting one's eye with a 0.5mW laser is to poke the laser itself into the eye. This sounds to me like paranoia taken to the extreme.
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    Possible eye damage from 1mW laser line?

    There is no way that kind of laser did anything to your eye. No possible way. You probably rubbed your eye and that caused your discomfort. Again, no possible way can a laser line leveling tool hurt your eye.
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    HELP: My dragon lasers spartan 1w horrible beam scatter.

    I'd try and take it apart to get at the output lens or window. Nothing to loose, right? Can you post a pic of the output end?
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    HELP: My dragon lasers spartan 1w horrible beam scatter.

    Were the pictures taken before or after you started trying to clean it? Did it get better or worse when you worked on it?
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    Lack of eye protection for red lasers

    Glad to hear it's getting better. I'd like to hear more about the "While setting up the meter I somehow got myself in the eye with the laser" bit, only because it's key to avoiding similar accidents. Procedure would be to hold the laser still, hold the detector in the beam, turn it on knowing...
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    Lack of eye protection for red lasers

    Sorry to hear of your injury. How did it happen?
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    Measuring laser output power

    If some of those laser pointers were green, there may also be lots of IR light coming out of them as well as the green beam, affecting the measurement.
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    Measuring laser output power

    You're right about the old meters on ebay, but I've seen them there for $50 and less. Before meters were built for lasers, pulsed energy was measured in "Gillettes", referring to how many blades it would poke through. Many of the oldest laser power meters are simple photocells with volt meter...
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