SU1420576A1 - Device for multichannel reception of optical signals - Google Patents

Abstract

The invention relates to atmospheric optics and meteorology and can be used to control the pollution of the atmosphere, determine the structure of aerosol suspensions, fogs, and fumes. The goal is to increase sensitivity while simultaneously increasing accuracy. The device contains a series-connected receiving telescope 1, a beam splitter 2, four photoreceivers 3, the beam splitter has two systems, the first of which contains 5,6,7 dichroic mirrors and 8.9,10 radiation optically associated with them, the second is the field The riser 11, made in the form of a Wollaston prism, is optically coupled to mirrors 12, 13 and reflectors 14,15,16. The beam splitter 2 is mounted on the platform 4 with the possibility of shifting to fixed positions relative to the fixed aperture of the field of view and photodetectors. I il. o (l

Description

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The invention relates to atmospheric optics and meteorology and can be used to control the pollution of the atmosphere, determine the structure of aerosols, fogs, fumes, etc.

The purpose of the invention is to increase the sensitivity of the device while improving the accuracy of measurements.

The drawing shows a block diagram of the proposed device.

 The device contains a series-connected receiving telescope 1, a beam splitter 2, four photoreceivers 3, the beam splitter installed on platform 4 and has two systems, the first of which contains dichroic mirrors (spectrometers) 5,7 and optically associated with them - residents 8–10, the second system consists of a polarizer 11, made in the form of a Wollaston prism, optically coupled to dichroic mirrors (spectrodynamics) 12, 13 and reflectors 14–16. In this case, the beam splitter 2 is mounted on the platform 4 with the possibility of displacement in fixed positions relative to the fixed aperture of the telescope and photodetectors.

The device works as follows.

Part of the radiation scattered by the atmosphere enters the receiving telescope 1, focuses in its focal plane, where the telescope diaphragm is located, and is directed away to the optically coupled dichroic mirrors 5-7 in the first position of the platform, which carry out spatial separation of This radiation is separated by separate wavelengths, detected further by the photodetectors 3, and the mirror 5 is simultaneously the input channel of the first beam splitter system, and the mirrors 6 and 7 are output. The reflectors 8 and 10 of the radiation, also the output channels of the first beam splitter system, provide optical links between the dichroic mirrors 6 and 7, respectively, and the photoreceivers 3. The reflector 9 optically connects the dichroic mirrors 5 and 7. When the platform 4 moves to the second fixed position, the radiation received by telescope 1, direction

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It is placed on a polarizer 11, which is an element of the input channel of the second beam splitter system, and is divided into two light beams with mutually perpendicular polarizations, which fall on the mirrors 12 and 13, respectively, which are spatially separated according to the polarization state separate wavelengths of the received radiation and is further recorded by the photodetectors 3, and the mirrors 12 and 13 are simultaneously the output channels of the second system. Reflectors 14 and 16, having output channels, provide optical links between dichroic mirrors 12 and 13, respectively, with photodetectors 3. Reflector 16 optically connects the polarizer 11 with mirrors 12 and 13.

The proposed device provides increased transmission of the beam splitter.

Claims (1)

Invention Formula A device for multichannel reception of optical signals, comprising a receiving telescope, photodetectors and a beam splitter, comprising a first system of optically coupled spectral dividers and reflectors and a second system of a polarizer and optical coupled spectrometers and reflectors, characterized in that, in order to increase the sensitivity and accuracy, the first system. the splitter contains a spectro-divider, which selects through the reflection channels and transmits different spectral components, in each of the channels The spectrodetector and the mirror optically connected with the photoreceivers are installed, the second beam splitter system contains a polarizer forming two channels with mutually perpendicular polarizations, a reflector and a spectral divider and a mirror connected to the photoreceivers are installed in each channel. the beam splitter systems are installed on the same platform, made with the possibility of placing relative to the fixed photodetectors and the diaphragm of the receiving telescope, and the beam splitter systems in fixed polo Bridges are optically coupled through the entrance to the diaphragm of the receiving telescope, and down to the receiver receivers.