Two points, the light emitted by the ordinary light, even if the same frequency (for example, with a 30W fluorescent lamp), in the same direction, but in the "phase" can not maintain a certain relationship, so still not coherent. The coherence of the laser with monochrome laser direction is closely related. Monochromatic, directional, the better the light, the coherence must be better. We can use the coherence of the laser energy convergence in a very small space within the region, so the laser can gather very small to produce great energy, which is used to trigger thermonuclear fusion. Nuclear fuel made more than a small sesame seeds even smaller solid micro ball. The laser energy of green laser pointer should be concentrated.
Then use the laser as the ignition to irradiation it, you can make miniature ball heated to hundreds of millions of degrees of heat, it produces energy density up to 10 million billion joules per cubic centimeter. Such a high energy density, the equivalent of dozens of tons of explosives to concentrate the energy generated by the explosion in the volume of one cubic meter density, which reached a magnitude of the atomic bomb explosion ultra-high energy density. A hologram is an example of the successful application of laser coherence. Laser beam device is divided into two beams, a beam of light hitting the film, called "reference beam"; another beam of light hitting the film after reflected from objects and then be photographed, called "object beam". The two beams of light to form interference fringes on the film, so that the light-sensitive film is holographic photo. The laser power of laser pointer can be calculated.
The hologram is not only realistic image of the three-dimensional sense of strong, particularly wonderful, look at the hologram, the viewer to change a different perspective, you will see photos of different locations in the scene. Even more amazing is that a holographic picture even if damaged, only one corner, still can reproduce all the scenery. However be noted that these four characteristics is generally laser with ordinary light on the overall comparison. In fact, in practical applications without the four characteristics of high demands. For example: the main requirements of the hologram is monochromatic and coherence; laser communication requirements are directional, monochromatic and coherent; Laser Ranging main requirement is good directionality and high brightness. Therefore, it is very important for the manufacturer of green laser .
The main requirements of laser weapons, high brightness and good direction. Applications for different purposes, different characteristics of the laser should be used or developed. The laser Notwithstanding the many unique and excellent performance, but it can not completely replace all the ordinary light, such as large-area illumination laser does not apply. CD player with CD CD player and CD is the application of laser technology is the most successful contemporary masterpiece. CD player and CD referred to as the "CD player" or "CD LP. CD in English compact disc - the abbreviation of Digital audio, meaning a small digital audio recording. Compared with traditional record player, CD player with many incomparable advantages: to provide excellent high-fidelity sound quality of high purity; stereo left and right channel separation of 85 dB, frequency response in the week (5 to 20000 Hz) between harmonic distortion of 0? 004%. It is to ensure the real power of green laser led the customer needs.
Wow and flutter does not exist, the record life is extremely long, almost never wear, the dynamic range of over 90 db, close to the dynamic range of large-scale symphony orchestra. Can make records in the record on the most subtle and delicate sound faithfully reproduced clearly: strong bass makes people feel legs swinging, full of pine scent when listening to mention the sound of the piano, the tide is like an avalanche, quiet even when the singer Kai lip texture do reproduce ... all the music fans to "burn" to subside and enthralled. Briefly when the CD player works, it may make a comparison with the traditional turntable. The ordinary phonograph record surface engraved with a pattern slot of a continuous track record analog audio signal in a continuous pattern slot. It is also important for the customer to know the real power of green laser pointer .
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