Laser Pointer
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laser pointer?
Should i get the 15mw 35mw or 55mw as my first strong laser pointer? i have handled lasers before and i dont want one that cant melt plastic with the cap add on. i also wanted to know does just looking at the point you are pointing to hurt your eyes or is it just when you point it in someone’s eyes. what is the diff. between green and red lasers?
ya but is their a difference other than color? a orange laser is like $200 dollars more. and what if the surface is not reflective?
Google “ANSI laser hazard class” for an explanation of the different hazard classes in terms of power levels. A 55 mW CW laser, for example, is a class III laser, which means it is powerful enough to do retinal damage in under the time it takes you to blink. (There is a technical term for this, “something aversion” I recall, the point is that if you shine it in your eye or someone else’s eye, you can do a lot of damage.) I know this may piss you off, and I am not trying to be insulting, but although you may have handled lasers before, it doesn’t sound like you know a lot about them. A 55 mW laser is not a toy, and if you are going to buy something like that, it is a good idea to read up on the safety issues.
A green laser is typically what is called a frequency doubled Nd:YAG. What that means is the laser’s primary wavelength is in the near-infrared, and they run that through a nonlinear crystal to double the frequency (halving the wavelength) to give you something in the green. The canonical “green” Nd:YAG wavelength is 532 nm, but there are some variations on that as the newer solid state lasers don’t use Nd:YAG primary oscillators, but some other variant where the Nd atoms are embedded in a different crystal than a YAG. An orange laser will be a frequency-doubled laser whose primary oscillator runs at a little longer wavelength (i.e., farther into the infrared) than an Nd:YAG.
Red lasers, in general, are laser-diodes and they are not frequency doubled. The primary output of the laser is in the red. That is why in general red pointers are cheaper than green or other colors, there is less optics inside them.
Here you can find Laser Pointer items on Ebay:
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Green Laser Pointer $29.99 |
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TTN-36043 Titan Combo LED / UV Flashlight with Laser Pointer $22.25 |
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TTN-11046 Titan 8-LED Flashlight with Laser Pointer $18.96 |
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3 in 1 Laser Pointer 2 LED Flashlight UV Torch Keychain New $1.68 |
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Handheld Laser Red Pointer Water Surface Level Leveler Leveller Indicator Meter $8.04 |
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Portable Straight Laser Guided Pointer Level Levelling Leveler Measurer Leveller $8.04 |
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2 in1 7 LED Flashlight Sports Torch +red Laser Pointer Light with Strap $8.99 |
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2 in1 7 LED Flashlight Torch + Red Laser Pointer Light with Strap $5.99 |
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Aluminum LED Party Flashlight With Laser Pointer $13.88 |
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Dynamo Wind up 3 in 1 LED Light Torch Laser Pointer Emergency USB Charger ‘ Blue $12.35 |
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Handheld 1.5-60Ft Laser Pointer Ultrasonic Distance Indicator Meter Range Finder $14.40 |
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Handheld Laser Red Pointer Water Surface Level Leveler Leveller Indicator Meter $7.55 |
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Portable Straight Laser Guided Pointer Level Levelling Leveler Measurer Leveller $7.55 |
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8 LED FLASHLIGHT W RED LASER POINTER OR 14 LED WITHOUT $14.95 |
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8 LED FLASHLIGHT W RED LASER POINTER OR 14 LED WITHOUT $14.95 |
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Digital Non-contact Portable IR Infrared Thermometer with Laser Pointer $26.25 |
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NEW! 8 LED Bright Mini Flashlight w/ Red Laser Pointer $7.99 |
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3 In 1 U.V. Laser Pointer and 4 LED Flashlight $9.25 |
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Handheld Laser Red Pointer Water Surface Level Leveler Leveller Indicator Meter $7.40 |
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Handheld 1.5-60Ft Laser Pointer Ultrasonic Distance Indicator Meter Range Finder $14.10 |
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(3 IN ONE)LASER POINTERS, PEN AND STYLIST WHOLESALE QUANTITY 23 PIECES FOR ONE $22.95 |
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Portable Straight Laser Guided Pointer Level Levelling Leveler Measurer Leveller $7.40 |
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DeWalt DW084 4 Beam Laser Pointer USED $9.99 |
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2 in 1 CAT TOY Laser pen pointer / LED torch keychain $3.93 |
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Coast / LED LENSER Write & Laser pointer 1mW keychain set in Gift Tin $25.13 |
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New 2.5″ Red Laser Pointer W Keychain Flashlight 1mW White LED & Red Uv Light $4.95 |
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Johnson 40-6680 Self Leveling Laser Pointer $221.96 |
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LCD Ultrasonic Distance Meter Measurer and Laser Pointer C $16.25 |
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Infrared IR Thermometer No Contact with Laser Pointer $47.00 |
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Wilmar 3 Piece LED Flashlight and Laser Pointer Set $20.55 |
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SuperTough – Contractor-grade Ultrasonic Distance Measurer with Laser Pointer $39.99 |
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Laser Dimension Master 3338 – Ultrasonic Tape Measure with Laser Pointer $24.95 |
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Mastercraft Estimator with Laser Pointer New Ultrasonic Sound Area Readings $17.99 |
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Magnetic Pick Up Tool LED Light & Laser Pointer, WA09 $8.29 |
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356109 Laser Pointer And Flashlight Key Chain- Case of 60 $195.20 |
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8 LED Blue Metal Body Flashlight w/Laser Pointer $6.75 |
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8 LED Titanium Metal Body Flashlight w/Laser Pointer $6.75 |
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FLEXILITE + LASER pointer True Utility led light 1mW $12.49 |
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TwinTask 3AAA Laser Pointer LED Incandescent Flashlight $54.96 |
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EZPCL2 Twin Beam LED Pocket Light with Laser Pointer $31.47 |
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2 FLEXIBLE LED LIGHT WITH LASER POINTER auto repair flashlight magnet lazer new $9.99 |
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6 FLEXIBLE L.E.D. LIGHT WITH LASER POINTER auto repair led lazer novelty magnet $19.99 |
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SE 8 LED + 1 Laser Pointer Flashlight, Black $12.81 |
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650nm Red Laser Safety Goggles Eye Protection Sports $59.80 |
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WILD ANIMAL PRINT LED FLASHLIGHT WITH LASER POINTER *NEW* $8.95 |
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WILD ANIMAL PRINT LED FLASHLIGHT WITH LASER POINTER *NEW* $8.95 |
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WILD ANIMAL PRINT LED FLASHLIGHT WITH LASER POINTER *NEW* $8.95 |
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WILD ANIMAL PRINT LED FLASHLIGHT WITH LASER POINTER *NEW* $8.95 |
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WILD ANIMAL PRINT LED FLASHLIGHT WITH LASER POINTER *NEW* $8.95 |
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CS Power Ultra Bright Multi-Function LED With UV Plus LASER Pointer Flash Light $14.87 |
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7 Color Bulb LED Flash Light with Laser Pointer (New Blue Aerial Aluminium) $499.89 |
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NEW Laser Pointer 5-Dot Self-Level Each Levels – Laser 40-6680 049448276158 $280.57 |
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NEW Ryobi 3 in 1 INFRARED Thermometer SONIC Measurer LASER Pointer E49IR01 $49.89 |
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Fuloon Ultrasonic Tape Measure Distance Meter With Laser Pointer $117.00 |
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8 LED Titanium Metal Body Flashlight w/Laser Pointer $6.75 |
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PMIR15 Mini Infrared Thermometer with Laser Pointer $47.89 |
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Infrared Thermometer -76 F to 1,022 F w/ Laser Pointer $44.99 |
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8 LED Blue Metal Body Flashlight w/Laser Pointer $6.75 |
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8 LED Black Metal Body Flashlight w/Laser Pointer $6.70 |
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EZR-PCL2 E-Z Red Twin Beam Spot Light With Laser Pointer. $27.78 |
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3-in-1 Universal UV Laser Pointer LED Flashlight w/ Carrying Pouch Ultraviolet $8.83 |
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Ultrasonic Distance Meter with Laser Pointer New $18.00 |
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LCD Ultrasonic Laser meter Pointer Distance Measurer $17.99 |
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New 5mw 532nm Astronomy Powerful Green Laser Pointer Black Body $8.99 |
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New Red Laser pointer 1mw Red Laser Pointer Pen 1mw Pointer Home Office Teaching $6.99 |
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New 8 LED w/ Laser Pointer Flashlight – Titanium $6.72 |
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New 8 LED w/ Laser Pointer Flashlight – Blue $9.99 |
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New 8 LED w/ Laser Pointer Flashlight – Black $6.72 |
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* X C LENT* 2 IN 1 LASER POINTER & FLASHLIGHT KEYCHAIN , 5 COLORS TO CHOOSE FROM $3.99 |
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* X C LENT* 2 IN 1 LASER POINTER & FLASHLIGHT KEYCHAIN , 5 COLORS TO CHOOSE FROM $3.99 |
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* X C LENT* 2 IN 1 LASER POINTER & FLASHLIGHT KEYCHAIN , 5 COLORS TO CHOOSE FROM $3.99 |
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* X C LENT* 2 IN 1 LASER POINTER & FLASHLIGHT KEYCHAIN , 5 COLORS TO CHOOSE FROM $3.99 |
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* X C LENT* 2 IN 1 LASER POINTER & FLASHLIGHT KEYCHAIN , 5 COLORS TO CHOOSE FROM $3.99 |
Tags: diy, electronics, hack, howto, laser