JPH01134285U

JPH01134285U -

Info

Publication number: JPH01134285U
Application number: JP2990488U
Authority: JP
Priority date: 1988-03-07
Filing date: 1988-03-07
Publication date: 1989-09-13

Description

[Brief explanation of the drawing]

第１図はこの考案における一実施例の構成を示
す図、第２図はレーザ発射及びＡＰＤバイアス電
圧印加のタイムスケジユールを示す図、第３図は
従来の構成を示す図、第４図ａ，ｂはレーザ光送
信タイミング及び従来の装置におけるビデオアン
プの出力を示す図である。図中、１はパルスレーザ発振器、２は凹レンズ
、３は折り返し鏡、４は対物レンズ、５は干渉フ
イルタ、６は第１の光検出器、７は第１の光検出
器出力、８はビデオアンプ、９はストツプ信号、
１０は第２の光検出器、１１はスタート信号、１
２はカウンタ、１３は測距データ、１４は送信レ
ーザビーム、１５は受信レーザビーム、１６は光
検出器バイアス電圧放電回路、１７はストツプパ
ルスマスク信号、１８はアンド回路、１９はポツ
ケルスセルトリガ指令である。なお、図中、同一
あるいは相当部分には、同一符号を付して示して
ある。 Fig. 1 is a diagram showing the configuration of an embodiment of this invention, Fig. 2 is a diagram showing the time schedule of laser emission and APD bias voltage application, Fig. 3 is a diagram showing the conventional configuration, Fig. 4 a, b is a diagram showing the laser beam transmission timing and the output of the video amplifier in the conventional device. In the figure, 1 is a pulse laser oscillator, 2 is a concave lens, 3 is a folding mirror, 4 is an objective lens, 5 is an interference filter, 6 is a first photodetector, 7 is the output of the first photodetector, and 8 is a video amplifier, 9 is a stop signal,
10 is a second photodetector, 11 is a start signal, 1
2 is a counter, 13 is distance measurement data, 14 is a transmitting laser beam, 15 is a receiving laser beam, 16 is a photodetector bias voltage discharge circuit, 17 is a stop pulse mask signal, 18 is an AND circuit, 19 is a Pockels cell This is a trigger command. In the drawings, the same or corresponding parts are designated by the same reference numerals.

Claims

[Scope of utility model registration request]

A transmission optical system converts the laser beam emitted from the pulsed laser oscillator into parallel light by an objective lens through the central opening of the folding mirror and transmits it, and after receiving the light with the objective lens on the same optical axis as the transmission optical axis, the folding mirror A receiving optical system that receives and photoelectrically converts the received light reflected by the photodetector and separated from the transmitted light through an interference filter, and a video A laser ranging device characterized by comprising a photodetector bias circuit that controls output to an amplifier.