The receiver size of the new cell phone jammer

The receiver size of the new cell phone jammer
Focal length and focal spot diameter (2) non-spherical aberration-free lens 2λ f aspheric lens focused spot radius: W '= b πD 2 because: 2λ θ = πD focus on the fundamental mode beam minimum radius: W' = fθ 2011 Wednesday, June 22, commonly used in years on Wednesday, the minimum laser focus spot size (the smallest commonly used laser focus spot size (f = 2cm)) W '= fθ (3) depth of focus of the important parameters of the laser focus) depth of focus --- Focus on the important parameters of laser A, in order to intercept both sides from the waist to the beam radius to increase 5% on its axis at the point of the laser light intensity decreased to half the light intensity at the focus,The intelligent management system of mobile phone jammer is the new-type digitization system specifically made for the modernization management of the prison. the point to focus the beam from the depth of focus as λf 2? = ± 2 πD D lens for the incident beam on the beam radius can be seen from the above depth and focus the incident laser wavelength and lens focal length proportional to the square, and D is inversely proportional to , so to get a larger depth of focus, we must choose a long focus lens, such as laser machining and deep hole plate 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.The detecting network can be formed in the area to be shielded through the specific network mode of cell phone jammer intelligent management system. 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. The management mode of detector in detecting, positioning, shielding ofcell phone jammerand alarming can be formed.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. 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.The intelligent management system of cell phone jammer can eliminate the negative effects caused by the mobile phone. Common mirror surface of 10.6? M the percentage of light reflectance of the surface thermal distortion of the quality factors and the relationship between the absorption rate is not coated or plated with antireflection coating and surface thermal distortion of the quality factor of the relationship between the absorption rate of 50% reflective film coating quality thermal distortion factors and the relationship between the surface heat absorption quality factor and the distortion of 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 hours, ZnSe than GaAs, the absorption coefficient at the surface, GaAs slightly better.