Laser pointers have employed laser diodes

Working along with my good friends Steve Michael, and the late Sam Savage, we shook the entire field of laser pointer and holography by creating holograms with laser pointers and stand-alone DIY laser diode systems. Laser pointers have historically employed laser diodes as the source of the light. It was such a shift in methodology that many of the 'experts' called it a farce, and said that it couldn't be done (several of them, however, now sell diode lasers for holography).It was developed in three basements. 

We reported about it right here on this web page that you are reading now. burning laser pointers have received a great deal of attention in the news media when they have been misused and they continue to raise safety concerns regarding the optical hazards involved when using one. It is still reverberating today throughout the world, and I continue to teach its methods in my School of Holography. Laser diode display holography was not developed in a professional laboratory.Those handheld green lasers pointers may not be as harmless as you thought.The initial red-beam diode laser pointers produced beams at a wavelength of about 690 nm.

Do the words “You’ll put your eye out.” ring in your head? Like you, I have a Red Laser pointer… and I’ve accidentally shot myself in the eye.Today the most common laser pointers sold have beams that appear to be relatively bright. To make matters worse, I’ve even had others inadvertently use my retina as a target. Have I gone blind yet?A recent study released by researchers at the National Institute of Standards and Technology (NIST) has revealed an alarming trend. Of 122 hand-held laser pointers tested, 44% of red lasers and 90% of green lasers tested failed federal safety regulations.

Have you ever been blown away by a 200mw Green Laser ? I've only ever used very small laser pointers before for indoor presentations, so I was completely unprepared for the power of this laser pointer. I just was! I literally felt like I could reach out and touch the Moon and stars!The folks at SKYlasers sent us a 55 mW Green Laser Pointer to try out. Subsequently, diode lasers were developed that produced red to reddish-orange light at progressively lower wavelengths (670, 650, and now 640 nm), mostly because the human eye senses 640 nm light to be about five times brighter than 690 nm light for the same laser output power (see the eye sensitivity vs. light wavelength graph below).

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