The brighter the laser beam light emitted by laser pointer is

The brighter the laser beam light emitted by laser pointer is.
Of course, there pulsed range finder, a typical the WILD DI-3000. Note that the measured phase does not measure the phase of the infrared or laser, but measurement of the modulation signal phase in the infrared or laser above. Construction industry, a handheld laser range finder for the housing measure, and its working principle is the same with this. This situation of laser pointer will be more obvious.Should convex reflector beam expander the beam expanded to, so that the laser beam to shine when the power density and energy density in the spherical shell to reduce. In order to achieve a sufficient attenuation require integrating sphere has a sufficiently large internal surface area, the sampling hole is small enough. The different sizes of the integrating sphere should be based on the energy level of the measured object. Laser into the penetration integral spherical shell, all the incident light can ultimately be spherical shell absorbed into heat, showing the rise of temperature for the integral spherical shell. Therefore, in order to avoid the spherical shell temperature rises too high, asking it to have a large enough heat capacity. Integral spherical shell surface coated with a diffuse layer, you must ensure that the diffuse layer is a good Lambertian diffuser. The visual effect of 200mW red laser pointer is almost the same.
Otherwise, it will shake the theoretical basis of the integrating sphere. Figure 2 is a diffuse distribution of the standard Lambertian diffuser, in which the arrows indicate the direction of the light, the length of the line representing the direction of the light intensity. For an ideal Lambertian diffuse, the diffuse reflection of light spherical distribution in space. Figure 3 device can be on the diffusion characteristics of the coatings were tested. Intensity laser beam incident at an angle to the surface of the sample measured in the range of 180-degree rotation detector D measurements in different directions of the diffuse light levels, and in polar coordinates to draw maps, and can understand the actual diffuser diffuse shot effect. On that basis, select the appropriate diffuse materials and process conditions. In addition, the coating with stable physical and chemical properties. It is the same as 20mW green laser pointer .
Beam expander design should also be considered the first reflection light can not escape from the entrance, as far as possible the energy concentration of the incident laser beam spread from the direct rays of the incident laser energy sensors and other factors. The energy detector in Figure 1 is actually a calorimeter. Absorber design for the adiabatic state, which absorb the laser energy is converted into heat, increased performance of the absorber temperature. It is also due to laser absorption can not truly adiabatic, while receiving laser energy to the outside heat, which leads to the maximum of the the thermopile actual output does not characterize the laser beam energy.