SMOKE DETECTOR Russian patent published in 2019 - IPC G01N21/3504 

FIELD: optics.

SUBSTANCE: group of inventions relates to the control of gases by optical means. System and method implemented by gas monitoring system for determination of at least one target gas characteristic includes at least one light source adjusted for light emission in wavelength range, wherein target gas has at least one absorption line, further includes retroreflector and control unit. Gas control system is adjusted to direct light through target gas to retro-reflector, which returns light to receiving optical means, further includes a detector system with at least one photodetector for detecting light, adjusted to provide a signal to be received by the control unit. Control unit is adjusted to control gas control system and to calculate at least one gas characteristic. Gas control system includes mirror device consisting of central and nearby mirrors, each of which has its surface and optical axis. Surface of nearby mirror covers central mirror surface. Central and nearby mirrors are installed at displacement angle between their optical axes. Mirror device has a line of sight and can be tilted in all directions mainly around the turning point to adjust the direction of the mirror device using only the mirror device. Surface of central mirror has surface with geometric center, and turning point is located near said center. Central mirror is adjusted to receive light from the light source and direct it to a retro-reflector which is adjusted to return light to a nearby mirror designed to reflect light on the detector system.

EFFECT: technical result consists in creation of system and method solving problems given above.

21 cl, 6 dwg