Laser Pointer

Laser pointer is a kind of pen, portable or handheld designed laser devices manufactured from laser module (laser diode). Common laser pointers includes red (635nm, 650nm), green (515nm, 520nm, 532nm), blue violet (405nm), blue (445nm, 450nm, 460nm), yellow (589nm), infrared (808nm, 980nm) infrared laser pointers. Laser pointer is able to emit a long distance visible beam for presentation on targeted objects. However, it might corrupt or affect the workplace navigation objects, such as museum of art or zoo etc. Laser pointer is not recommended in these places.

History
The earliest laser pointer with a wavelength of 633nm is helium-neon (HeNe) gas laser, typically used to generate energy less than 1mW laser beam. The cheapest laser pointer uses red laser diode of wavelength close to 670/650nm. Slightly more expensive laser pointer uses 635nm red-orange laser diode, which is more easily identified by human eyes. There are also other color laser pointers such as 532nm green laser pointer is also available on the market. Early in 21st century, 5933.5nm yellow-orange laser pointer appeared, 473nm blue laser pointer appeared in Sep. 2005, and 405nm blue violet laser pointer appeared in 2010.

Features of laser pointers
Brightness
The irradiated laser light spot from laser pointer not only depends on the power and apparent brightness of surface reflectance of laser beam, also the color vision of the human eyes since human eyes are most sensitive to green light among wavelength range of 520nm-570nm. Human eyes have weaker sensitivity to blue or red light, thus green laser pointer seems brighter than other color lasers with the same power.

Power
Laser pointer power uses milliwatt. In United States, laser is classified by American National Standards Institute and U.S. Food and Drug Administration (FDA). Laser pointers are classified as below:
Class 2 or II: visible laser pointer (400-700nm) less than 1mW
Class 3A or IIIa: laser pointer among 1mW to 5mW
Class 3B/IIIB: laser pointer among power 5mW to 500mW
Class 4/IV: laser power up 500mW

Laser pointer classification
Red Laser Pointer or Red – Orange Laser Pointer
Red laser pointers are being designed with the simplest structure of 635nm or 650nm red laser diodes, easily operable by battery. Red laser pointer appears on the market in the early 21st century at low price and compact design, and 671nm DPSS red laser pointer appears at the same time. DPSS red laser technology assures high product quality and narrower band laser pointer.

Yellow Laser Pointer
593.5nm yellow laser pointer appeared in the early 21st century, available on basis of DPSS technology through a nonlinear crystal adding by 1064nm and 1342nm laser beam. The complex process has made yellow laser pointer inefficient and unstable, low output power of 1mW to 10mW. In addition, majority 593.5nm yellow laser pointers operate in pulse mode using a smaller size and low power pump diode.

Green Laser Pointer
Utilizing 808nm infrared laser excitation nonlinear crystal to produce 1064nm infrared laser light, and then multiplier produces 532nm green laser pointer, belongs to solid-state laser. Some green lasers operate in pulse or quasi-continuous mode to reduce cooling problem and prolong battery life.

Low power green laser pointer is visible even at night since scattering by atmospheric molecules. This laser device is often used for astronomy star and constellation pointing by astronomy enthusiasts or astronomers. 5mW green laser pointer (Class IIIa) is the safest laser for astronomy with visible beam in darkness. There is no need to select higher power laser for astronomy projection.

Blue Laser Pointer
473nm DPSS green laser pointer is low power and unstable. Early in 21st century, high power 445nm blue laser came in market usually in portable or handheld design. 460nm blue laser with the purest blue light is always available in pen design mainly used for projection.

Blue violet laser pointer
405nm blue violet laser pointer belongs to semiconductor laser, close to ultraviolet light, low visibility, but can stimulate fluorescence. It is applicable for paper money detection, chemicals test.

Laser Pointer Applications
Laser pointers are usually used as an eye-catching point in education, business presentation, and visual demonstrations.
● Red laser pointer can be used in almost any indoor or low light situations, pointing out details by hand may be convenient.
● Green laser pointer can be used for astronomy enthusiasts.
Green laser beam in moonless light, often can be seen clearly, accurately pointing out individual stars to others nearby. In addition, green laser pointer can be used by astronomers in astronomy lectures, which can direct a specific location of star or constellation accurately. Laser alignment is more easily by using eyepiece.
● Tour guide
Laser pointer makes convenient and rapid targeting of tentacles difficult objectives. It can accurately indicate target.
● Wide travelers and explorers
Laser pointers can be used in outdoor adventure, indicating distant targets and issuing distress signal to make travel more secure.
● Construction sites and mining field
Laser pointers makes precise instructions for remote buildings, avoids approaching the danger zone, and commander kilometer away field easily.
● Fire, rescue, help, and earthquake
Laser pointer is especially important in many emergency life-saving occasions.
● Entertainment
Low level power laser pointers can add good entertainment atmosphere in bars, gatherings.
● Industry lasers
Laser pointers can be used in industrial field. For instance, Construction Company may use high quality laser pointer in order to improve accuracy of specific distance from the display in large project.
● Scientific research
Laser pointers can also be applicable in scientific research field, such as photonics, chemistry, physics, and medicine and so on.

Laser pointer hazards and Laser Safety

● Laser pointer is harmful to human eyes. Never point lasers to human eyes directly, keep it away from child in order to avoid accidental injury. Please wear laser safety glasses while using a laser pointer indoor or close operation. Avoid direct eye stare at laser beams.

● Do not continuous light laser pointer too long (especially green laser), in summer no more than 30 seconds. Please stop laser pointer immediately if laser pointer feels hot until completely cooled.

● Green laser pointer may need to warm-up for some time in winter. It can be placed in a pocket to warm it up, put in battery, continuous light time is not more than one minute. It can prevent excessive aging of laser pointer or overheating to damage laser diode or laser module of laser pointers.
● Laser pointers cannot be used in the zoo for free frightened animal.
● Astronomy amateurs in the use of laser pointer for star pointing should not frequent and prolonged use of laser pointer, so as not to interfere with other people stargazing and photography.
● Stop using laser pointer in crowed public places in order to avoid harming others.
● High power laser pointers with significant thermal effects cannot be used continuously for a long time, especially for temperature sensitive solid state laser.
Article Resource: http://www.berlinlasers.com/laser-tech

Infrared laser pointer

Infrared laser pointer is a kind of invisible beam ir laser, which emits invisible laser beam and light spot to human naked eyes. It is a kind of laser pointer that is able to be used in military targeting, military army surveillance and medical treatment etc.

How can infrared laser pointer be applicable in practical fields?
Unlike the usual available laser pointers, infrared laser pointer will project invisible infrared light, and provide the special infrared light source for all kinds of ir application fields.

Medical treatment with infrared lasers

For instance, 808nm and 980nm infrared laser pointers will be greatly applicable in modern medical treatment. For instance, 808nm infrared lasers cooperated with 650nm red lasers will be applied in pain treatment, joint pain release and muscle relaxing by pointing of infrared laser light and red laser light. The expanded beam of near infrared laser will be playing an obvious part in modern time medical care. As a matter of fact, lots of clinical or hospital has developed physical treatment method with ir lasers for pain treatment and relaxation.

Infrared light source for military targeting and surveillance

since infrared laser project invisible infrared light to human naked eyes, military soldiers have used IR lasers in military targeting tools and weapons. The IR laser light provides the most special and convenient light source for night vision targeting, detecting and positioning of enemies without being noticed. The infrared laser pointer will be also being used as weapons of surveillance in military battlefield, home guarding, civil wars etc.
Infrared laser pointer projects the unique light source, will help cameras obtain the best and largest illumination in IR laser illumination work.

Caution with infrared laser pointers:
Infrared laser projects invisible IR laser light to human eyes. It's extremely dangerous on condition of being pointed by IR lasers without being noticed. Never try to point such kind of lasers unless you have got full understanding of dangers of infrared lasers. Infrared lasers should be operated by professionals or skilled personal with full understanding of laser safety knowledge and safety measures. Do be cautious with infrared pointer pointers and let be a useful tool in practical applications.

Berlinlasers.com Launches Industrial Lasers and Fiber Optic Testing Tools

Berlin Optics Int’l Group Limited launches new English edition website of Berlinlasers.com, concentrating on genuine output powered industrial alignment lasers, laser pointers and fiber testing tools with reliable quality and guaranteed warranty period from 180 days to one year.

Employed by the most mature and advanced laser diode technology, Berlin Lasers is consist on focusing to research and development of laser optic devices for multiple industrial applications. For instance, Berlin Lasers have begun to position marketing goal to more and more industrial requirement from high school, colleague, laboratory experiment, scientific researches etc.

On contrary to traditional laser applications in formal presentation in education, entertainment, more and more industrial designed laser pointers have been developed by Berlin Lasers. Alongside those of formal presentation and targeting laser pointers for astronomy star pointing and constellations, there have been 808nm and 980nm infrared laser pointers available for modern infrared light source illumination in military targeting, pointing and detection etc. The featured 1mW blue laser pointer with finished 460nm laser diode craftsmanship has made perfect substitution of complex manufactured 473nm blue laser pointer. It provides the brightest and most visible blue laser beam and light spot on targeting goal and surfaces.

Industrial dot, line, cross generating alignment lasers are greatest creation from Berlinlasers.com, which will provide the most convenient and efficient targeting reference with highest precision alignment and collimations. All alignment lasers adopt industrial DC power supply design in order to fulfill 24 hours continuous operation. Complying with reliable and stable performance laser diode, red, green, and infrared laser modules are able to maintain stable laser beam output power and low divergence in work. People can make easy operation of various laser devices after having a total acknowledgement of laser diode information and technology.

Berlin Lasers is always consisting on reliable services such as warranty period, guaranteed return policy. The support team will be always glad to be with customers so as to offering complete set of laser pointer inquiry service, technical support and after sale services. Berlin Laser will always focus on genuine and reliable laser devices, and provide the most reliable service and helpful laser knowledge as much as possible.

Infrared Laser Pointers Applied In High-Tech Fields

Infrared laser is associate clearly special laser among all wavelengths of optical spectrum. Standing out of color spectrum, there are unit formal obtainable lasers with wavelength of 808nm, 980nm, 1064nm etc. IR laser area unit principally applicable in those of invisible infrared radiation supply needed fields such as police investigation industry, foreign and domestic intelligence agencies, infrared radiation required medical care etc.

Infrared laser can always emit completely different invisible laser light to human naked eyes, which has special and apace modified roles in fashionable technology fields. IR lasers in spectrum of up to 780nm emit invisible infrared radiation to human eyes. In military targeting, infrared laser area unit able to enhance the twilight vision instrumentation capabilities, which can create good gathering of sunshine sources and increasing instrumentation visibility at long distance targeting and positioning.

Laser lined with IR wavelength spectrum is associate indispensable half for tract troopers jointly of the accent of twilight vision targeting tools. For example, infrared lasers area unit succinctly designed with camera for outside police investigation, which can give economical infrared radiation illumination for state and country guarding etc.

On basis of matured laser technology, infrared lasers have consummated finished IR laser diode acquisition. Light beam area unit able to be created from the crystal, maintaining extremely stable and reliable output and therefore the lowest beam divergence operating. Infrared lasers have realized transportable style and fulfills multiple applicable in sensible used.

Professionals have created bigger breakthrough of infrared laser pointers in medical treatment. Middle Infrared lasers being employed with red laser lights are fashionable and necessary treatment technique in health up, aches, pains relief. Light emitting from the infrared laser diode area unit utilized for pain relief of aches or joint, wound take care of animals and humans. Infrared laser lightweight can create previous improve of health condition in joint aches treatment, neck pain, fibrillation, spine, arthritis, muscle aches, back injuries, inflammations, connective tissue reducing etc.

Safety Measures with IR lasers:
Precautions may be a major concern with infrared lasers since human eyes cannot find or notice any quite infrared wavelength. High steam-powered IR lasers would be dangerous enough to harm membrane while not being detected. Infrared lasers ought to be solely hand-held by skilled operators underneath special safety guard. A try of infrared laser radiation preventing laser safety glasses may be a major concern.