Press again the shortcut key on the green laser pointer body and you may cancel the full screen display mode
Large laser printers such as the DEC LPS-40 is 10 helium-neon laser-driven, although the actual laser is Class IIIb, but the printer is interlocked so as to avoid any exposure to the laser beam exposure, Therefore, the device does not produce any biological hazards, which also applies to CD players and small laser printers, they are first-class device). Class II output power of 1 mW laser products. Will not burn the skin, does not cause a fire. As the eye reflex can prevent some eye damage, so these are not considered dangerous laser optical devices. (For example, when the eye encounters a bright light, it will automatically blink, or turn the head to avoid the strong light. This is called reflex action or reflex time in this time of such laser products will not cause eye injury. Press the shortcut key for full screen displaying on the body of green laser pointer and you can get the PPT file displaying in full screen.However, a person will not be willing to look a long time staring at it). In this type of laser equipment should be placed on a yellow warning label. First class IIIa laser output power of 1 mW product to 5 mW. Will not burn the skin. Under certain conditions, these lasers can cause blindness and other eye damage. These lasers should have: (1) laser light, indicating that the laser is working; (2) should use the power key switch to prevent unauthorized use; (3) a dangerous label should be affixed to the label and output xx. Class IIIb laser product first 5 mW output power to 500 mW. When the power is relatively high, these laser products can burn skin. These lasers have clearly defined as harmful to the eyes, especially when the power is relatively high, will cause eye damage.Press again the shortcut key on the 100mW green laser pointer body and you may cancel the full screen display mode. These lasers must have:: (1) key switch to prevent unauthorized use; (2) laser light, indicating that the laser is working; (3) Turn on the power after 3-5 seconds delay allows the operator to leave beam path, (4) is equipped with emergency stop switch, always turn off the laser beam; (5) must be affixed with a red laser danger labels and xx (aperature) label. (250mw laser irradiation a red paper, less than 2 seconds to ignite.) Class IV laser products greater than 500 mW output power. These lasers will be able to cause eye damage. Burn skin and ignite clothing just like the laser can ignite other materials
There’s a blank screen shortcut key on the 50mW blue violet laser pointer body.What is the history of the development of laser laser What is laser LASER: LASER: Light Amplification by Stimulated Emission of Radiation Laser: Laser: light amplification by stimulated emission of radiation laser light. The historical development of 20th century history of the development of laser the early emergence of black-body radiation, atomic line spectra, the early 20th century, there has been black-body radiation, atomic line spectra, the photoelectric effect, Compton scattering of photochemical reactions and other experimental phenomena, these relate to the interaction energy of light and matter and momentum exchange characteristics of the classical theory can not be explained at the time. Laser laser development history of the development history of the pre-dawn darkness Planck in 1900 proposed the concept of energy quanta, 1900, Pulang Curtis out of the quantum energy concept, and has received the 1918 Nobel Prize in Physics; 1918 Nobel Prize in Physics; Nobel Prize in Physics "in recognition of the services he rendered to the advancement of Physics by his discovery of energy quanta "1905 Einstein's photon hypothesis and successfully explained the photoelectric effect, in 1905, Einstein's photon hypothesis and successfully explained the photoelectric effect.It would be a good choice to press the blank screen shortcut key on the 200mW green Laser Pointer body if you want to discuss something with the audience.related green laser pointer blog:
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