Infrared night vision laser searchlighting machine

Abstract

The invention discloses an infrared night-vision laser searchlighting device, which takes an infrared laser diode (LD) as an active infrared night-vision searchlighting device light source and mainly comprises an optical system which takes the LD as the light source and an LD conduction heat abstractor. The optical system comprises a light beam compressing and light beam reshaping unit combined by an optical fiber and a non-spherical lens assembly for correcting the non-axisymmetry of output beams; a light beam expanding unit consisting of a negative lens assembly to prevent a phenomenon of ionization and an ablation phenomenon generating dispersion dust particles caused by laser beam focusing in a transmission process; and a collimation unit consisting of a coated lens assembly for leading the laser beam to form a collimating searchlighting beam. The invention has the advantages of high searchlighting power, good beam collimation property, small volume, light weight and good practicability and is capable of observing a distant target object 2-3km far away at night.

Description

technical field [0001] The invention relates to an optical search device, in particular to an infrared night vision searcher, in particular to an infrared night vision laser searcher. Background technique [0002] A technology that realizes night vision observation by means of photoelectric imaging devices is called night vision technology. Night vision technology includes two aspects: low-light night vision and infrared night vision. Low-light night vision technology, also known as image intensification technology, is a photoelectric imaging technology that uses night vision goggles with image intensifier tubes to enhance weak targets illuminated by night light for observation. Infrared night vision is divided into: passive and active. Passive infrared night vision technology realizes the observation of the target object by means of the temperature difference or radiation difference of the infrared radiation beam emitted by itself between the background or the various part...

AI Technical Summary

Problems solved by technology

[0003] Active infrared night vision often used infrared light sources such as halogen lamps and Nernst lamps at first. These light sources are large in size, high in power consumption, and poor in concealment, so they are poor in practicability and difficult to promote. They have been phased out

In recent years, there have been many active night vision searchlight devices using light-emitting diodes (LEDs) as light sources on the market, which have broken through the shortcomings of large size and high power consumption. The energy is small, and its operating distance is small, usually only tens of meters, and it cannot realize the observation and monitoring of long-range (2-3km) targets

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