Source: https://patents.google.com/patent/JPS54143670A/en
Timestamp: 2020-03-29 01:10:44
Document Index: 514802431

Matched Legal Cases: ['art 100', 'art 200', 'art 300', 'art 600', 'art 200', 'art 400', 'art 600']

JPS54143670A - Distance measuring system - Google Patents
JPS54143670A
JPS54143670A JP5185678A JP5185678A JPS54143670A JP S54143670 A JPS54143670 A JP S54143670A JP 5185678 A JP5185678 A JP 5185678A JP 5185678 A JP5185678 A JP 5185678A JP S54143670 A JPS54143670 A JP S54143670A
JP5185678A
Ryuji Tokuda
1978-04-28 Application filed by Canon Inc filed Critical Canon Inc
1978-04-28 Priority to JP5185678A priority Critical patent/JPS54143670A/en
1979-11-09 Publication of JPS54143670A publication Critical patent/JPS54143670A/en
PURPOSE: To achieve the improvement in the accuracy of distance measurement by automatically setting the gain, etc. of a signal processing circuit through signal level detection operation prior to distance measurement detection operation.
CONSTITUTION: A conversion circuit part 100 connected with a photoelectric transducer SPC, a signal processing circuit part 200 connected to an inhibit and driving circuit part 300 and a fixed distance setting circuit 500 are connected to a control signal generating circuit part 600 such as of sample holding signal and frequency divided signal. Then, the signal processing circuit part 200 consisting of a gain selecting amplifier circuit OPI which receives control signal from a gain selection control circuit part 400, analog switch circuits SA1, SA2 which receive the control pulses according to the lighting and non-lighting of IRED elements from the control signal generating circuit part 600, sample holding operational amplifier circuits OP3, OP4 connected with capacitors CA1, CA2, addition amplifier circuit OP5, delay amplifier circuit OP6 and comparator COMP1 performs the signal level detection operation and after the gain thereof is automatically set, the distance detection operation is accomplished, whereby the intended object is achieved.
JP5185678A 1978-04-28 1978-04-28 Distance measuring system Granted JPS54143670A (en)
JP5185678A JPS54143670A (en) 1978-04-28 1978-04-28 Distance measuring system
DE19792917229 DE2917229C2 (en) 1978-04-28 1979-04-27
US06/391,394 US4429967A (en) 1978-04-28 1982-06-23 Distance measuring system
JPS54143670A true JPS54143670A (en) 1979-11-09
ID=12898495
JP5185678A Granted JPS54143670A (en) 1978-04-28 1978-04-28 Distance measuring system
US (1) US4429967A (en)
JP (1) JPS54143670A (en)
DE (1) DE2917229C2 (en)
JPS5686306A (en) * 1979-11-15 1981-07-14 Canon Inc Signal processing circuit for distance measuring device
JPS57141572A (en) * 1981-02-25 1982-09-01 Mitsubishi Electric Corp Laser distance measuring device
JPS5830715A (en) * 1981-08-18 1983-02-23 Olympus Optical Co Ltd Focusing device for camera
JPS5964805A (en) * 1982-10-05 1984-04-12 Konishiroku Photo Ind Co Ltd Auto-focusing device
JPS60128412A (en) * 1983-12-15 1985-07-09 Canon Inc Method for controlling quantity of light emission of automatic focusing detecting device
JPS5652711A (en) * 1979-10-08 1981-05-12 Canon Inc Automatic focus detector of base line rangefinder system
JPS5773709A (en) * 1980-10-27 1982-05-08 West Electric Co Ltd Focusing-point detector
JPS5817311A (en) * 1981-07-22 1983-02-01 Canon Inc Distance measuring device and automatic focus adjusting device using said measuring device
DE3411690A1 (en) * 1983-04-01 1984-11-08 Canon Kk Photoelectric conversion apparatus
JPS60104203A (en) * 1983-11-11 1985-06-08 Canon Inc Signal processing circuit of semiconductor position detecting element
US4773751A (en) * 1984-03-09 1988-09-27 Minolta Camera Kabushiki Kaisha Infinite level setting device for a distance measuring device
US4760419A (en) * 1985-12-26 1988-07-26 Canon Kabushiki Kaisha Distance measuring apparatus
EP0328136B1 (en) * 1988-02-12 1995-05-03 Omron Tateisi Electronics Co. Distance measuring apparatus
JPH098563A (en) * 1995-06-20 1997-01-10 Nec Corp Light receiving preamplifier
JPS50116031A (en) * 1974-02-26 1975-09-11
CH482172A (en) * 1968-09-24 1969-11-30 Paillard Sa Rangefinder light beam reflected
DE2126178C3 (en) * 1970-05-27 1979-08-09 Canon K.K., Tokio
1978-04-28 JP JP5185678A patent/JPS54143670A/en active Granted
1979-04-27 DE DE19792917229 patent/DE2917229C2/de not_active Expired - Lifetime
1982-06-23 US US06/391,394 patent/US4429967A/en not_active Expired - Lifetime
JPH0143288B2 (en) * 1982-10-05 1989-09-20 Konishiroku Photo Ind
JPH0580646B2 (en) * 1983-12-15 1993-11-09 Canon Kk
DE2917229A1 (en) 1979-11-08
DE2917229C2 (en) 1990-03-22
US4429967A (en) 1984-02-07
JPS57165774A (en) 1982-10-12 General purpose control device for rate of erroneously issued alarm
JPS622143A (en) 1987-01-08 Automatic gain adjustor for nmr image sensor
JPS5574467A (en) 1980-06-05 Method of eliminating noise from known frequency
JPH0252282A (en) 1990-02-21 Time interval measuring method
JPS63168555A (en) 1988-07-12 Diagnosis of separation for finished surface of building
JPS53172A (en) 1978-01-05 Frequency detection method
JPS61129525A (en) 1986-06-17 Indication recording device
JPS52119970A (en) 1977-10-07 Sound measuring apparatus