JPS54140562A - Range finder - Google Patents

Range finder

Info

Publication number
JPS54140562A
JPS54140562A JP4800778A JP4800778A JPS54140562A JP S54140562 A JPS54140562 A JP S54140562A JP 4800778 A JP4800778 A JP 4800778A JP 4800778 A JP4800778 A JP 4800778A JP S54140562 A JPS54140562 A JP S54140562A
Authority
JP
Japan
Prior art keywords
light
relationship
diameter
light receiving
range
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4800778A
Other languages
Japanese (ja)
Inventor
Mutsuhide Matsuda
Hideo Yokota
Shuichi Tamura
Hideo Tamamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP4800778A priority Critical patent/JPS54140562A/en
Priority to DE19792916314 priority patent/DE2916314A1/en
Publication of JPS54140562A publication Critical patent/JPS54140562A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/46—Indirect determination of position data

Abstract

PURPOSE: To improve the range finding accuracy by accomplishing the peak reception of light clealy while holding under a preset condition the relationship between a projector and a receiver.
CONSTITUTION: An object is scanned by the irradiating surface 6 having a diameter D1, which has come from a light emitting element 3 having an effective diameter of d1 through a condensing lens 2 having a focal length of f1. The reflected light from the object, which comes from a light receiving surface 7 of diameter D2 and which is determined by a condensing lens 4 of a focal length f2 and a light receiving element 5 of an internal effective diameter d2. If the condition d1/f1=d2/f2 is satisfied while effecting such selections that the diameters of the elements 3 and 5 have the relationship of d1=d2 and that the focal lengthes of the lenses 2 and 4 have the relationship of f1=f2, then the sizes of the irradiating surface 6 and the light receiving range 7 become equal. As a result, the detected signal curve upon the light reception of the element 5 takes such a shape as has a steep value appearing when the surface 6 and the range 7 become coincident while generating no flat portion. As a result, the range finding accuracy can be improved by the peak detection.
COPYRIGHT: (C)1979,JPO&Japio
JP4800778A 1978-04-23 1978-04-23 Range finder Pending JPS54140562A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP4800778A JPS54140562A (en) 1978-04-23 1978-04-23 Range finder
DE19792916314 DE2916314A1 (en) 1978-04-23 1979-04-23 Optical distance measuring device - uses light source and lens performing scanning motion and has stationary photoelectric cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4800778A JPS54140562A (en) 1978-04-23 1978-04-23 Range finder

Publications (1)

Publication Number Publication Date
JPS54140562A true JPS54140562A (en) 1979-10-31

Family

ID=12791231

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4800778A Pending JPS54140562A (en) 1978-04-23 1978-04-23 Range finder

Country Status (2)

Country Link
JP (1) JPS54140562A (en)
DE (1) DE2916314A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5696313U (en) * 1979-12-25 1981-07-30

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5657012A (en) * 1979-10-16 1981-05-19 Canon Inc Distance detecting optical system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5696313U (en) * 1979-12-25 1981-07-30

Also Published As

Publication number Publication date
DE2916314A1 (en) 1979-10-31

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