The wireless presenter green laser pointer includes page up function

 The wireless presenter green laser pointer  includes page up function.
Including controllers, cables, and that part is used for data exchange between the computer and the laser tracker. The laser tracker during the measurement between the computer and the juice a lot of data exchange, and requires a high data transfer rate, so by the controller between the computer and the laser tracker in the form of a local area network (LAN) transmission data. Case, the adapter and the base for fixed-tracker and adjust its height. Laser Tracker application. Laser tracker by the measurement speed, high accuracy, easy to move and so on characteristics, widely used in large industrial product quality testing and laboratory facilities to install detection. Leica LTD500 laser tracker, the following as an introduction to the application of the automobile production plant. The customer can control the computer by using  green laser pointer .The exit beam divergence due to diffraction effects, with the objective aperture size. According to the hole in the Fraunhofer diffraction theory shows, a diameter D of the hole caused by the diffraction angle (ie half of the beam divergence angle) is: where is the laser wavelength. General aperture of the telescope objective, so the beam out of the shooting aperture diffraction effects due to beam divergence is usually negligible. The image above diaphragm A is to reduce the influence of stray light, so that the edge of the spot into a neat and clear round to further improve the directionality of the beam. Laser collimator the optoelectronic goal target. The laser collimator optical target for the commonly used four-quadrant photodetector, shown in Figure 3.19. The vivid, visible and straight laser beam can be emitted by the wireless presenter  green laser pointer .
Figure 3.19 four-quadrant photodetector schematic. Composed of symmetrical device in the up and down four silicon photocell. When the laser beam to the photocell 1, 2, 3, 4 on the type, respectively, generate the voltage V1 and V2, V3 and V4. If the beam is precisely aligned to the center of the four quadrant photoelectric detector, V1 = V2 = V3 = V4. If the beam is biased upward, then V1> V2; if the beam is downward biased, then the V1 <V2. V1 and V2, the input to the arithmetic circuit, after the differential amplifier indicates that the meter indicates the offset in the beam up and down. Similarly can be offset around the beam. The arithmetic circuit according to the beam up and down or about the size of the offset output electrical signals, this signal to drive a mechanical gear so that the optical receiver the target back to the light collimation direction in order to achieve automatic control of quasi-direct or automatic guided. Symmetry of photovoltaic cells for laser collimator on the accuracy. The four-quadrant photodetector, the requirements of each piece of the sensitivity of the photocell must be strictly consistent with their relative positions should be accurate.