Green laser pointer company adopts professional bonding technique

green laser pointer company adopts professional bonding technique
The long-focus lens to choose, for example, laser processing in the deep and thick, laser cutting and welding, to reduce the taper, require a larger depth of focus. 1.1.4 Laser window and lens materials, Nd: YAG laser: generally quartz and glass CO2 laser: semiconductor (such as Ge, GaAs, ZnSe, CdTe, etc.) and alkaline halide materials (such as KCl, NaCl, etc.) 1, requirements and conditions, (1) optical absorption as small as possible (2) thermal conductivity. Window and lens materials require thermal conductivity as large as possible (3) hardness and smoothness.What mentioned above is the basis for the survival of Haituo green laser pointer company. Required to increase resistance to abrasion hardness, high capacity, high smoothness required to meet the coating requirements. (4) chemical resistance of. Requires a low solubility in water and corrosion ability. Optical components of optical and thermal material parameters 2, mirror damage due to heat: the heat destruction of the semiconductor light absorption coefficient is mainly determined by the semiconductor free carrier absorption. This increase in absorption with temperature exponentially increases above a certain temperature, the substrate can not dissipate the heat it absorbs, the temperature rise, so that absorption of a further increase in temperature has led to a further rise, and so a vicious cycle that due to thermal stress too large and fragmented. Haituo green laser led firm tries to set up challenging and competitive object.Figure shows that the Ge, ZnSe and GaAs absorption coefficient of three materials with temperature, their destructive temperatures were 70 ℃, 250 ℃ and 300 ℃. The ability to withstand thermal damage Ge poor, but it is relatively cheap, so only for the following power through 100w co2 laser system. Often mirror the percentage surface light reflectivity of thermal distortion and surface absorption quality factor, the relationship between the non-coated antireflective film coating or thermal distortion factors and the quality of the relationship between the absorption rate of the surface coating 50% reflective film quality factor and surface heat distortion the relationship between the heat absorption rate distortion quality factors and the relationship between the lens surface absorption antireflection coating plated or coated, most of the laser through the substrate, the surface absorption and thermal distortion of the relationship between the quality factor shown in Figure 1, when the surface absorption coefficient h, ZnSe than GaAs, the absorption coefficient at the surface, GaAs slightly better.Haituo green laser pointer company promotes the spirit of struggle. Lens 50% reflective film coated, only part of the laser through the substrate, the surface coating layer of the substrate than the absorption dominates the absorption, GaAs than ZnSe, as shown in Figure 2. GaAs lasers commonly used operand kW output mirror. 99% reflective lens coating film, the transmitted light is only 1%, the absorption of light transmissive material is very small, not only the quality factor of GaAs high heat distortion. Ge also because of its good thermal conductivity and high heat distortion of the quality factor, close to the GaSe level, as shown in Figure 3. Laser beam quality factor M 1.1.5 M2 beam quality factor of the green laser pointer beam output characteristics of the laser beam quality is an important indicator parameters. Haituo green laser pointer firm accepts the change of market demand.Evaluation of beam quality in many ways, has used the focused spot size, the far-field emission angle as evaluation criteria, advantages and disadvantages of these evaluation criteria, evaluation of the laser beam to form a long time were not of uniform quality standards.