Electronic System of Counteraction to Laser Means of Location and Destruction

Abstract

The work is devoted to the development of a device for counteracting laser means of location and destruction. The analysis of data from open literature on similar systems and technologies have been performed. Theoretical calculations of the effectiveness of protecting the human eye or optical device from laser damage with various types of protection have been carried out.Laser technology has been used by the military since the mid-1950s. The military uses lasers in systems of direct thermal destruction of the object, pointers, detection systems of snipers, systems of interference with snipers, rangefinders, etc. In the late 1970s and early 1980s, military-experimental blinding self-propelled complexes were created in the USSR. The development of laser and computer technology has significantly reduced the dimensions of the devices, as well as their cost. Now such systems are widely used in combat operations.On the other hand, there is a challenge to counteract such complexes. Systems are needed that can hide optical systems from detection, as well as prevent them from being destroyed by blinding complexes.The purpose of the work is to develop a system to counteract the laser complexes of location and damage. Its task is to hide the optical device from laser scanning systems and prevent the damage of the optical device or the human eye by blinding laser radiation.The relevance of this article is due to the need to create new and improve existing electronic systems to counteract the laser means of location and destruction. Despite the fact that studies in this area are conducted for more than one year, the choice of such systems is very small.To minimize the probability of detecting an optical device, mechanical means of narrowing the beam glare angle are commonly used. One example is cellular blinds. The length of one cell must be much higher than its diameter. The surface of the cell tubes should be blackened to reduce the reflection of light rays. For more accurate narrowing of the flare angle, it possible to set several cellular blends in a row - the number depends on their optical qualities.Optical means include optical filters that absorb, block, or scatter the infrared spectrum, because laser detectors of optical devices are in it. Such a filter should be placed on the optical sight between the lens and the lens hood. After all, it reflects the infrared rays, working as a mirror. Therefore, this angle of reflection should be reduced by all means, in particular tubular blinds, as described above.However, these methods cannot fully protect the operator of the optical observation device from the powerful laser radiation directed to the device. To solve this problem, you can use technology that completely blocks the optical channel when you receive high-power laser radiation on an optical device. The radiation sensors respond to the high-power laser radiation of the destruction and transmit the signal to an electronic circuit, which turn on a liquid crystal filter that covers the optical channel. Under the influence of electric current, liquid crystals become a special structure in such a way that infrared radiation does not pass through the filter. When the radiation is lost, the electronic system returns the liquid crystal filter to a transparent state.The power impulse of laser means of location and destruction can significantly damage a person's vision, and at large lens diameters or at short distances between a these means and an observer, a person may lose it completely. The same applies to light-sensitive arrays of optoelectronic devices. As shown in the calculations, the maximum permissible level of radiation energy density in unprotected optics is much lower than the radiation energy density provided by laser means of location and destruction.The opto-electronic protection system reduces the time of laser radiation to the human eye or the light-sensitive matrix of the optoelectronic device to safe limits. As shown by the calculations, this increased the maximum allowable level of radiation energy density above the level provided by power lasers for their entire range of use and lenses with diameters from 24 mm to 100 mm, which will protect them from the blinding effect of laser means of location and destruction.