http://www.cleverscampcamp.com/laser-pointer/
What specifications should look for on a RED laser pointer for the BEAM to be visable?
I’m trying to find a red laser pointer where the beam is easily visable from any direction, kinda like the laser that the predator uses on its helmet, but thats just an example. Someone help!
The laser should be in the visible band. to be red you would need to be in the frequency range of 400-484 THz (==>650 -720 nm wavelength).
The power level should be so that you could clearly see it. The beam width should be wide enough so that you could see it.
Types of laser pointer
The early laser pointers were helium-neon (HeNe) gas lasers and generated laser radiation at 633 nanometer (nm), usually designed to produce a laser beam with an output power no greater than 1 milliwatt (mW). The least expensive laser pointers use a deep red laser diode near the 670/650 nanometers (nm) wavelength. Slightly more expensive ones use a red-orange 635 nm diode, making them more easily visible than their 670 nm counterparts due to the greater sensitivity of the human eye at 635 nm. Other colors are possible too, with the 532 nm green laser being the most common alternative. In the past few years, yellow-orange laser pointers, at 593.5 nm, have been made available. In September 2005, handheld blue laser pointers at 473 nm have also become available. Very recently, blu-ray/violet lasers at 405 nm have also become available.
The apparent brightness of a spot from a laser beam depends not only on the optical power of the laser and the reflectivity of the surface, but also on the chromatic response of the human eye. For the same optical power, the green laser will seem brighter than other colors because the human eye is most sensitive at low light levels in the green region of the spectrum (wavelength 520 – 570 nm). Sensitivity decreases for redder or bluer wavelengths.
The output power of a laser pointer is usually measured in milliwatts (mW). In the US, lasers are classified by the American National Standards Institute[1] and by the Food and Drug Administration (FDA). Visible laser pointers (400-700 nm) operating at less than 1 mW power are Class 2 or II and visible laser pointers operating with 1–5 mW power are Class 3A or IIIa. Class 3B/IIIb lasers (operating between 5-500 mW) and Class 4/IV lasers (operating above 500 mW) cannot be legally promoted as laser pointers.[2]
[edit] Red/red-orange laser pointer
These are the simplest pointers, as laser diodes are available in these wavelengths. The pointer is essentially no more than a battery-powered laser diode. The first red laser pointers were released in the early 1980s; they were large, unwieldy devices sold for hundreds of dollars.[3] Today, they are much smaller and generally cost very little. In the last years DPSS red laser pointers emitting at 671 nm have also become available. Although that wavelength can be obtained with an inexpensive laser diode, higher beam quality and narrower spectral bandwidth are achieved through DPSS.
United States
Laser pointers are Class II or Class IIIa devices, with output beam power less than 5 milliwatts (<5 mW). According to U.S. Food and Drug Administration (FDA) regulations, more powerful lasers may not be sold or promoted as laser pointers.[34] Also, any laser with class higher than IIIa (more than 5 milliwatts) requires a key-switch interlock and other safety features.[35]
All laser products offered in commerce in the US must be registered with the FDA, regardless of output power.[36]
In Utah it is a class C misdemeanor to point a laser pointer at a law enforcement officer and is an infraction to point a laser pointer at a moving vehicle.[37]
On November 2nd, 2009, Dana Christian Welch of Southern California was sentenced to 2.5 years in a federal prison after being found guilty of shining a hand held laser light into the eyes of two different pilots landing Boeing jets at John Wayne airport[38][39].
Modify Your Laser Pointer
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ThermoWorks Gun shaped Point and Shoot big digit Next Generation Food Safety Infrared thermometer with built in laser pointer $69.00 ThermoWorks Gun shaped Point and Shoot big digit Next Generation Food Safety Infrared thermometer with built in laser pointer: High Quality 12:1 optics, Bright laser pointer, Point and Shoot simplicity. Max temp and reading hold features, Handy button for switching from °C to °F ,Range to 536°F (280°C). Measuring Range: -67°F to 536°F, (-55°C to 280°C). it gives the reading in one second!…. |
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Episode 4 $1.99 … |
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One Zero Point Energy Nano Wand Pen By Quantum Value $6.74 Zero Point Energy Wand Usages: Discharge energy blockages in your body Energize all foods and liquids! (Wand anything with water in it and notice the increased taste and vibrancy!) Put the wand your fridge, increase the life and taste of everything in it! Supports the self-healing process in the body Relieve a variety of injuries, and long standing aches and pains! Neutralize Free Radicals in you… |
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50 392 LR41 Watch Alkaline Batteries AG3 SR41 Battery $0.95 50 New Type O-392 LR41 Watch Batteries. This is a new set of 50 type O-392/LR41 alkaline watch batteries. These batteries are commonly used for Swatch, Fossil, Timex and Casio brands. Brand new & guaranteed factory fresh…. |
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Red Laser Pointer Sight w/ Mount Brackets $34.99 This laser scope is a high quality scope-mounted laser pointer for your air rifle, air pistol or crossbow. This red sight provides a wide field of view and is suitable for rapid-firing or shooting moving targets and includes mounting brackets. |
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Quartet Black Executive Laser Pointer PDA Stylus $13.99 The Quartet MP-2100Q Black Executive Laser Pointer is a unique presentation tool. This tool is both a fully-functional laser pointer with a class 3 laser and a high quality PDA stylus. |
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HiRO 2.4GHz WiFi Presenter with Laser Pointer & Mouse $35.49 Control for PowerPoint presentation, laser pointer, and wireless mouse functionErgonomic design and compact sizeEasy to use like a normal wireless mouse |
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HiRO H50181 4-in-1 Black Wireless Green Laser Pointer/ Multimedia Control $58.49 Focus on connecting with your audience using the HiRO laser pointer and multimedia control. The control allows you to operate your computer from an extended distance so that you can give presentations with confidence. |
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HiRO H50182 4-in-1 Pearl White Wireless Green Laser Pointer/ Multimedia Control $58.99 Focus on connecting with your audience using the HiRO laser pointer and multimedia control. The control allows you to operate your computer from an extended distance so that you can give presentations with confidence. |
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Wireless Presenter With Laser Pointer $59.99 Wireless Presenter With Laser Pointer |
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Pointer,Pen,Laser,Srbe $35.99 POINTER,PEN,LASER,SVBE |
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Quartet Metal Laser Pointer $23.99 0% 1 Each 1500 ft 1500 ft Maximum 2 x AAA 5.25″ Length Metal Laser Pointer 2 x AAA Batteries Class 3A Pinpoint the details of your graphic presentation with this laser pointer. Laser pointer directs a bright red dot on any medium that is visible under all interior lighting conditions. Nonslip design features a metal barrel and gold-color steel pocket clip. Class 3A laser pointer projects up to 500 yards and runs on two AAA batteries (included). ACCO Brands Corporation Black Laser Pointer MP1100Q Metal Metal Laser Pointer No Pocket Clip Presentation Quartet Steel www.acco.com |
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Quartet Keychain Laser Pointer $12.99 0% 1 Each 1500 ft 1500 ft Maximum 2 Keychain Laser Pointer 2 x LR44 Batteries Class 3A Key chain laser pointer projects a brilliant red laser dot to highlight the details of any presentation. Projection distance is up to 500 yards. Casing is made from black, high-impact plastic. Laser pointer includes a removable key chain and two LR44 batteries. ACCO Brands Corporation Black Key Chain – Removable Keychain Laser Pointer Laser Pointer MP600Q No Plastic Quartet www.acco.com |
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Coast Laser Pointer – COSLL7300 $13.57 MPN #COSLL7300. Coast Laser Pointer. Most Flashlights products are available for in-store pickup from Advance Auto Parts. |
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Light Module w/Laser Pointer $73.99 AVerVision130/300i LED Light Module w/Laser Pointer (back clip) |
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Vernier Laser Pointer $23.99 2 x AAA Laser Pointer 2 x AAA Batteries This Class IIIa (<5 mW) laser pointer can be used with the Vernier Photogate to produce a gate that is wider than the normal 7.5 cm spacing, making it possible to measure the speed of an automobile or of a person running. The laser case is made of aircraft aluminum, and it uses two AAA batteries (included). The wavelength of the light is 650 nm. Aluminum LASER Laser Pointer Vernier Vernier Software & Technology www.vernier.com |
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Nexxtech Pen Laser Pointer $14.99 Ideal for use on a board or projection screen while giving lectures or holding business meetings, the Nexxtech Pen Laser Pointer features a contemporary black design with nickel plated push button and a pocket clip. Its red colour laser beam has a range greater than 90 meters and is easy to use-just push on and hold to activate the laser. Pop this dressy pen-style laser pointer in your pocket and you’ll always be ready to make a presentation. The Nexxtech Pen Laser Pointer requires 2x AAA batteries (not included). UPC: 741235154655 Manufacturer’s Part Number: HS-LP-019 |
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Travitek Voyager LT100-L2 Laser Pointer $23.99 4 Voyager LT100-L2 Laser Pointer 4 x LR4/SR41 Button Batteries Simple to use and versatile, this laser pointer is perfect for presentations, business professionals and general use. The L2 has all the essentials: a standard red laser pointer, a blue ballpoint pen, a super bright LED light and even a durable stylus. Matte gray finish. Ambir Technology, Inc Ball Pen Gray LT100-L2 Laser Pointer Presentation Stylus Travitek Voyager Voyager LT100-L2 Laser Pointer www.ambir.com |
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Quartet General Purpose Laser Pointer $17.99 0% 1 Each 2 x AAA 450 ft 450 ft Maximum 5.88″ Length General Purpose Laser Pointer 2 x AAA Batteries Class 2 High quality laser pointer projects a brilliant red beam that is ideal for both bright and darkened areas. Design features a high-impact plastic casing. Laser pointer includes two AAA batteries. ACCO Brands Corporation Black General Purpose Laser Pointer Laser Pointer MP1202Q No Plastic Pocket Clip Presentation Quartet www.acco.com |
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Quartet Classic Comfort Laser Pointer $24.99 0% 1 Each 1500 ft 1500 ft Maximum 2 x AAA Classic Comfort Laser Pointer 2 x AAA Batteries Class 3A Laser pointer projects a brilliant red dot onto any medium, including high lumen overheads, videos and multimedia projections. Rubberized cushion grip offers a soft touch. Laser pointer includes a handy pocket clip and two AAA batteries. ACCO Brands Corporation Blue Classic Comfort Classic Comfort Laser Pointer Cushioned Grip Laser Pointer MP2703BQ No Pocket Clip Presentation Quartet Steel www.acco.com |
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Quartet 4-Function Executive Laser Pointer $28.99 0% 1 Each 4 4-Function Executive Laser Pointer 450 ft 450 ft Maximum 4-Function Executive Laser Pointer 4 x LR41 Batteries Class 2 Laser pointer is a versatile presentation tool with four functions. Ultra-bright laser dot is easily viewed even against high-lumen projections at up to 150 yards. Combination design offers a class 2 laser pointer and LED Light at one end. The other end has a ballpoint pen and PDA stylus. Laser pointer includes four LR41 batteries. ACCO Brands Corporation Ball Pen Chrome LED Light Laser Pointer MP2800Q Metal No Pocket Clip Presentation Quartet Stylus www.acco.com |
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Quartet MP1350Q Slimline Laser Pointer $26.99 0% 1 Each 1500 ft 1500 ft Maximum 2 x AAAA MP1350Q Slimline Laser Pointer2 x AAAA Batteries Class 3A Laser pointer projects highly visible red dot up to 500 yards and is designed for large venues and conference rooms. Red dot is visible in all room conditions. Slim, contoured design features a contemporary brushed aluminum body with gold accents. Executive-style Class 3a laser pointer includes two AAA batteries. ACCO Brands Corporation Aluminum Laser Pointer MP1350Q MP1350Q Slimline Laser Pointer No Pocket Clip Quartet Silver Slimline www.acco.com |
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NEXXTECH KEYCHAIN LASER POINTER $9.99 This small, compact keychain laser pointer from Nexxtech is great to use for presentations or as a fun toy for your pet! The keychain features a red laser diode, easy push-button activation and has a projection range of more than 100 feet in the dark. Wavelength: 630-680 nm and Max Output: 1W. Requires 3 x AG3 button cell batteries (included). UPC: 741235162520 Manufacturer’s Part Number: DCX-230 |
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Da-Lite 75837 Presentation Pointer – Laser $36.99 1 Year Limited 75837 75837 Presentation Pointer 75837 Presentation Pointer Batteries Da-Lite Da-Lite Screen Company Laser Presentation Pointer www.da-lite.com |
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Quartet Metal Laser Pointer – 500yd Maximum Projection $17.99 0% 1 Each 1500 ft 1500 ft Maximum 2 x AAA 5.25″ Length Metal Laser Pointer 2 x AAA Batteries Class 3A Pinpoint the details of your graphic presentation with this laser pointer. Laser pointer directs a bright red dot on any medium that is visible under all interior lighting conditions. Nonslip design features a metal barrel and gold-color steel pocket clip. Class 3A laser pointer projects up to 500 yards and runs on two AAA batteries (included). ACCO Brands Corporation Black Laser Pointer MP1100Q Metal Metal Laser Pointer No Pocket Clip Presentation Quartet Steel www.acco.com |
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Da-Lite Jumbo Red Laser Pointer $226.99 10″ Length 2 x Alkaline 79900 Da-Lite Da-Lite Screen Company Jumbo Red Laser Pointer Laser Pointer Presentation www.da-lite.com |
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Quartet MP1402Q Underline & Strobe Laser Pointer $64.99 0% 1 Each 2 x AAA 450 ft 450 ft Maximum 5.50″ Length MP1402Q Underline & Strobe Laser Pointer 2 x AAA Batteries Class 2 Versatile, multifunction laser pointer features a blinking underlining mechanism and strobe-effect function as well as projecting a highly visible red dot. Durable design features all-metal construction and a sleek, compact barrel. Laser pointer includes two AAA batteries. ACCO Brands Corporation Gray Laser Pointer MP1402Q MP1402Q Underline & Strobe Laser Pointer Metal No Pocket Clip Presentation Quartet www.acco.com |
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Quartet Comfort Laser Pointer – 500yd Maximum Projection $21.99 0% 1 Each 1500 ft 1500 ft Maximum 2 x AAA Comfort Laser Pointer 2 x AAA Batteries Class 3A Laser pointer projects a brilliant red dot onto any medium, including high lumen overhead, video and multimedia projections. Design features a rubberized cushion grip and a handy pocket clip. Contour comfort laser pointer operates on two AAA batteries (included). ACCO Brands Corporation Blue Comfort Comfort Laser Pointer Cushioned Grip Laser Pointer MP2700BQ Metal No Pocket Clip Presentation Quartet www.acco.com |
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Honeywell Presentation Pointer – Laser Wireless – Black, Red $79.99 0.05″ 1 oz 1.50″ 150 ft 2.60″ Black Ergonomic Honeywell Honeywell International, Inc Laser PPRF PS/2 Presentation Pointer Radio Frequency Red USB Wireless Wireless Presentation Pointer www51.honeywell.com/honeywell/ |