LASER RANGE FINDER WITH FUNCTION OF OPTICAL AND OPTOELECTRONIC DEVICE DETECTION Russian patent published in 2018 - IPC G01C3/08 

FIELD: measuring equipment.

SUBSTANCE: invention relates to technical means for measuring the distance to objects with laser radiation sources and can be used in optical observational devices, sight-range finders and other devices. Laser rangefinder contains a laser emitter module, a receiver module, a data acquisition and processing module, and a display module. Laser emitter module consists of a semiconductor laser with a modulator attached to it, the first lens installed in series along the beam path. Receiver module is installed in parallel with the laser emitter module and consists of successively installed on the beam of the second lens, the photodiode of the receiver module with the receiver module connected to it. Data acquisition and processing module and the display module are installed in the laser range finder so that the output of the data acquisition and processing module is connected to the input of the display module. Modulator is located in the laser emitter module such that the first output of the modulator is connected to the input of a semiconductor laser located in front of an optically coupled first lens, the second modulator output is connected to the first input of the data acquisition and processing module. In the receiver module, the second lens is optically coupled to the photodiode of the receiver module located so that the output of the photodiode of the receiver module is connected to the input of the receiver module amplifier, the output of the receiver module amplifier is connected to the second input of the data acquisition and processing module. Receiver module also includes an additional photodiode of the receiver module, an additional amplifier of the receiver module, a first phase plate and a first beam splitter with a reflective face located between the second lens and the photodiode of the receiver module. In the laser emitter module, a photodiode of a laser emitter module, an amplifier of a laser emitter module, a second phase plate and a second beam splitter with a reflective face located between the first lens and the semiconductor laser. First phase plate is installed between the second lens and the first beam splitter, the reflective face of which is optically coupled to an additional photodiode of the receiver module. Output of the additional photodiode of the receiver module is connected to the input of an additional amplifier of the receiver module, whose output is in turn connected to the third input of the data acquisition and processing module. Second phase plate is installed between the first lens and the second beam splitter, the reflective face of which is optically coupled to the photodiode of the laser emitter module. Output of the photodiode of the laser emitter module is connected to the input of the amplifier of the laser emitter module, the output of which is in turn connected with the fourth input of the data acquisition and processing module. In this case, the sensitive area of the additional photodiode of the receiver module is located in the focal plane of the second lens, the sensitive area of the photodiode of the laser emitter module is located in the focal plane of the first lens, the radiation polarization plane of the semiconductor laser is aligned with planes perpendicular to the reflecting faces of the first and second beam splitters, and the optical axes of the first and second phase plates are oriented at an angle of 45° to the plane.

EFFECT: increase the energy potential of the laser range finder.

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