Funny Laser Pointer

Never aim the beam of light from a green laser pointer 300mwat a person\'s face--it can damage the retina of the eyes.You all know that when making a laser device, the most difficult part it\'s focusing without buying a module. So here it is, a complet guide about how to make a focusable laser module with parts you have lying around. This module is not recomended for laser diodes over 300mW, because lens can melt and it\'s not the best heatsink. the goals I wanted to achieve are:the module acts as heatsink and it can focus the laser to a single burning point or a beam.

Take the laser out of a cheap dvd drive and house it in a metal flashlight.Amazingly powerful macro - how did you ever come up with the idea to do this with the laser lens off a dvd player?Lasers other than "Laser pointers" are not to be "played with" without knowing the dangers and exercising care.The focus of a dvd laser is very very close to the position where the media actually is. (Well DUH!).The output power of a dvd laser is about 0.5 Watt, which can hurt you.Staring on top of the lens while the laser is active might to the trick.

I want to get a 5mw laser pointer, and trying to figure out what color has the brightest beam, not just dot. I want to be able to see the beam somewhat decently.I wanted to make a laser with higher power output, but the construction of classical laser is very difficult, so maybe sometimes.Everyone certainly knows laser pointers.Lasers in these drives tend to have a pulse output of about 100 - 250mW and continuous power 50 - 125mW and work in the infrared range at a wavelength of 780nm.

What color is best for that? Green? A purple blu-ray?Or what?Laser in dvd/blueray drives isn’t strong to do anything useful with it at all. I dont really like this video with no music btw and the ‘idiot’ put his hand in the laser light as well.This makes me want to build one of those computer-controlled laser paper cutters.Using a webcam to look at the laser behind your LCD and just look at your LCD with your hands behind it.I realise this video focuses on cheap laser construction…and hats off to that.

A far superior method of mounting is to obtain a decent red Laser Engraver, and remove the collimator from it (the good ones are made of brass, and are adjustable).It was once suggested that the coherence lengths of red laser diodes was sub-millimeter, but has been proven to surpass the coherence length of even the best gas lasers on the market!The output is quite noisy, and appears multimode, but the use of laser diodes for holography has been proven before!

If you have a green laser pointer available, do you get the same value for laser pointer.These things use a very different kind of laser that\'s about the same size as (and works in a similar way to) an ordinary LED (light-emitting diode). But if lasers are that big, how come we can use them in small things like portable CD players and handheld barcode scanners? Chances are you\'ve used a semiconductor laser in the last few days without even knowing it.

It does not include “laser products that are used in professional or academic settings that may be used by children (for example, 2000mw Laser Pointerprinters, CD players, educational and science kits).”FDA’s guidance is for “children’s toy laser products”, defined by the agency as “a product primarily used as a toy that is manufactured, designed, intended or promoted for novelty or visual entertainment use by children under 14 years of age.” The reviewer, Bill Kuch, says the green-only version contains a Class IIIa laser that uses diffractive holographic optics to create the beams.

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