Popular infantile pastime became now the so-called laser (light) pointer. Produced as a miniature working tool for teachers, lecturers and guides, it attracts the daring fans of science fiction an opportunity to play “the hyperboloid of engineer Garin”, highlighting the highly directional light beam of a particular item of interest at a considerable distance. Fortunately, the cost of these games without any negative consequences, because the data pointers are allowed to use only semiconductor lasers or LEDs (option, which often go manufacturers) with integrated optics, the radiation power of which should not exceed 1 mW. The increase in the concentration of light energy in an extremely small solid angle can create, according to experts, a danger to vision when hit by the beam in the eye directly or after reflection from the mirror surface.
The owners of laser pointers can be adapted for their interesting and quite safe fun — home fotocasa. The light pulse will serve as the analogue of the bullet, and the receiver will be the photo sensor of the target. In the case of hitting the target will be an electric signal which will cause the light (completely harmless) a confirmation of well-aimed “shot”.
Weapon of photothera — laser (light) pointer, complemented by a simple electrical device on and encased in ready-made or self-made model of the gun, the rifle, etc. When such a weapon is removed from the fuse (closed contacts SA1) and the trigger guard is not pressed (the button SB1 in the open position), the electricity from entering the battery GB1 through the current limiting resistor R1, the maximum charge bolsheselsky the capacitor C1. When fotovitrina (pressing SB1) switches and fast discharge of C1 on the laser pointer A1. The latter will give a short pulse of directional light, which is in contact with the photo sensor will cause a reaction of the target (the flash of the led indicator of hitting the target).