Patent EA-013144-B1 (EA)
Title: Portable missile launcher sight guidance device
Inventor: LITVYAKOV SERGEJ BORISOVICH
IPC: F41G7/26
Filed: 2008-08-05
Abstract: The invention is related to aircrafts remote control area and is specifically intended for missiles guidance on targets via laser beam as a part of portable antitank guided missile launcher. The portable missile launcher sight guidance device contains body-mounted sighting channel, including series-connected thermal imager (1), comprising lens (5) and the first photodetector (10) installed on its focal plane, laying mark shaping unit (2), connected to the first photodetector (10) and having output for connection with monitor (11), laser guidance channel (3), optical axis of which is parallel to sighting channel optical axis, including series-connected laser illuminator (12), optical modulator (13), comprising the first drive (15), zoom lens (14), including the second drive (20) and the first position sensor (21), as well as electronic control unit (9) and channels alignment system, including the first reflection prism (31), located at the output of sighting channel and laser guidance channel (3) in such a way, that its input edge is optically connected with zoom lens (14), and its output edge – with lens (5) of thermal imager (1) and mounted with capability of its exclusion from the path of rays coming out from laser guidance channel (3) and coming into sighting channel. The new components introduced in sight guidance device include overflight unit (8), located on laser guidance channel (3) optical axis next to zoom lens (14), comprising optical deflecting module (22), the third drive (23) and the second position sensor (24), and laser rangefinder, including transmitting channel (4), comprising pulse laser (25) and transmitting optical system (26), and receiving channel, including receiving optical system and the second photodetector (7), with optical axes of receiving and transmitting (4) channels being parallel to sighting channel optical axis, laser illuminator (12) is implemented in form of continuous laser with IR band emission wavelength, optical modulator (13) is implemented as a raster with code lines for continuous laser emission space-time modulation and installed with capability to be rotated by means of the first drive (15), and equipped with tacho-generator (16), and electronic control unit (9) comprises controller (27), including the first microprocessor, and laser guidance channel control module (17), including the second microprocessor, with controller (27) having inputs for introduction of control commands from external control unit (28), for external programmer and test equipment (29) connection, connection to the second photodetector, laser guidance channel (3) control module, as well as outputs, connected to laying mark shaping unit (2), pulse laser (25), laser illuminator (12), laser guidance channel (3) control module, inputs of which are connected to tacho-generator (16), the first (21) and the second (24) position sensors, and its outputs – to the first (15), the second (21) and the third (24) drives. Channels alignment system may additionally include the second reflection prism (32), located in such a way, that its input edge is optically connected with laser rangefinder (4) transmitting channel output, and its output edge – with lens (5) of thermal imager (1) and mounted with capability of its exclusion from the path of rays coming out from laser rangefinder (4) transmitting channel and coming into sighting channel, as well as two optical compensators (33, 34), one of which is located at the output laser guidance channel (33), and another one (34) is installed at the output of laser rangefinder (4) transmitting channel. On the outer side of sight guidance device's body there is a slot with mounting hardware for a possible installation of additional optoelectronic observation module (30), with laying mark shaping unit (2) having an input for connection of additional optoelectronic observation module (30). The invention provides security and increases interference immunity of the portable missile launcher sight guidance device, improves target hit probability under conditions of terrain accidents adjoining the sighting line at the expense of introduction of programmable modes of laser control field overflight over the sighting line, thereby increasing accuracy of missile guidance on target, and ensures laser illuminator and optical modulator design simplification.