Laser Class

Categories 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 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.

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. Today, they are much smaller and generally cost very little. In recent years diode-pumped solid state red laser pointers emitting at 671 nm have also become available. Although this wavelength can be obtained directly with an inexpensive laser diode, higher beam quality and narrower spectral bandwidth are achieved through DPSS.

Yellow laser pointers

Yellow laser pointers emitting at 593.5 nm have become available to the market in the last few years. Although they are based on the DPSS process, in this case two lasing lines of the ND: YVO4, 1064 nm and 1342 nm, are summed together with a nonlinear crystal. The complexity of this process makes these laser pointers inherently unstable and inefficient, with their outputs ranging from 1 mW to about 10 mW, varying a lot with temperature and usually mode-hopping if they get too hot or too cold. That is because such a complex process may require temperature stabilizers and active cooling, which can't be mounted into a small sized host. Also, smaller 593.5 nm pointers work in pulsed mode so they can use smaller and less powerful pumping diodes.

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Canon / FX-6 CARTRIDGE LASER CLASS 3170 / 1559A002AA $111.25 Canon - FX-6 CARTRIDGE LASER CLASS 3170 - 1559A002AA

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Laser Equipment Warning Signs - Danger - Class 4 Laser $16.8 OSHA compliant Laser Equipment Warning Signs ensure the safe use of lasers. Laser Equipment Warning Signs meet ANSI Z136.1 and FDA/CDRH recommendations and requirements Rigid plastic or self-adhesive vinyl signs are available in 10"W x 7"H and 14"W x 10"H sizes Message reads "Visible And/Or Invisible Laser Radiation Avoid Eye Or Skin Exposure To Direct Or Scattered Radiation Class 4 Laser" with a standard OSHA compliant "Danger" header

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Laser Equipment Warning Signs - Danger - Class 3A Laser $16.8 OSHA compliant Laser Equipment Warning Signs ensure the safe use of lasers. Laser Equipment Warning Signs meet ANSI Z136.1 and FDA/CDRH recommendations and requirements Rigid plastic or self-adhesive vinyl signs are available in 10"W x 7"H and 14"W x 10"H sizes Message reads "Laser Radiation Avoid Direct Eye Exposure Class 3a Laser" with a standard OSHA compliant "Danger" header

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Vernier Software LASER Laser Pointer $33.42 MODEL LASER VENDOR VERNIER SOFTWARE FEATURES Laser Pointer This Class IIIa ( 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.

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Laser $10 Laser

Laser - Laser Pointer...This Class Iiia ( $33.44 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. [LASER] UPC: 783537040120 UNSPC: 45111601 0.3 LB

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Acco Standard Pen Size Plastic Class 3 Laser Pointer $16.99 1 Year 1500 ft 1500 ft Maximum 2 x AAA 5.78" Height ACCO Brands Corporation Acco Black Laser Pointer MP1200 Plastic Presentation Standard Pen Size Plastic Class 3 Laser Pointer www.acco.com

Brother International Business Class Laser Fax FAX4100e $482.63 MODEL PPF4100e VENDOR BROTHER INTERNATIONAL FEATURES IntelliFAX 4100e High Speed Business Class Laser Fax. Designed for small to medium businesses multiple users can easily share the benefits of this fully featured laser fax machine well suited for departmental support. A fast modem helps reduce transmission time while abundant memory makes for worryfree fax storage. Its innovative design incorporates a standard high capacity paper tray and the ability to add a second optional tray for more advanced paper handling requirements. A high monthly duty cycle and high yield consumables contribute to lower operating costs. SPECIFICATIONs INTERFACE (1) USB port (1) Parallel portPRINT SPEED up to 15 ppm BlackRESOLUTION up to 600 x 600 dpiDISPLAY 16 character/2 line LCDFAX Print Technology : B/W Laser Faxing Capability : B/W Faxing Modem Speed : 33.6K bps Super G3 Fax Modem Transmission Speed: Approx. 3 seconds per page Auto Doc. Feeder : 30Pages Paper Capacity : 250Sheet Input Optional LT400 250sheet Tray Memory : 8MB Memory not upgradeable Fax Page Memory : Up to 500 pages Dual Access : Yes Polling : Yes Broadcasting : 182 locations Group Dial : up to 6 groups Quick Scan : Approx. 2 sec/page Delayed Transmission : with 50 Timers Memory Backup : up to 4 days Gray Scale : 64 shades Remote Fax Retrieval: Yes Fax Forwarding/ Paging: Yes Auto Fax Reduction: Yes Transmission Verification: Yes (with image) OutofPaper Reception: Yes Coding Method Mono: MH/MR/MMR ITUT Group : Super G3 Fax Resolution : 203x392 lines/inch Activity Report/ Journal Report: up to 200TELEPHONE Telephone Handset : Yes Fax/Telephone Switch: Yes OneTouch Dial : 32 locations Speed Dial : 100 locations Auto Dial : 132 locations External TAD port : Yes Automatic Redial : 1 times/5 minutes Distinctive Ring Detection: Ready Caller ID : Ready Tel Index Search : Yes COPIER Copying Capability: B/W Copying MultiCopying : up to 99 Output Resolution : Up t

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Quartet MP1100Q Metal Economy Pocket Class 3 Laser Pointer. Each $19.53 Manufacturer: Acco. Each. Metal Economy Pocket Laser Pointer, Class 3, Projects 500 Yards, Black/Gold Clip Move freely around the room. Powerful beam can be seen even in the brightest room. Ideal for highlighting overhead or LCD projections, videos, maps

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Laser Equipment Warning Labels - Caution Laser Radiation $14.2 OSHA compliant Laser Equipment Warning Labels ensure the safe use of lasers. Laser Equipment Warning Labels meet ANSI Z136.1 and FDA/CDRH recommendations and requirements Self-adhesive labels are available in 2-1/2"W x 1-3/4"H and 5"W x 3-1/2"H sizes and come in packages of 5 Message reads "Laser Radiation Do Not Stare Into Beam Class 2 Laser" with a standard OSHA compliant "Caution" header

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