JPS57168215A - Optical system having constant magnification and variable image position - Google Patents

Optical system having constant magnification and variable image position

Info

Publication number
JPS57168215A
JPS57168215A JP1120682A JP1120682A JPS57168215A JP S57168215 A JPS57168215 A JP S57168215A JP 1120682 A JP1120682 A JP 1120682A JP 1120682 A JP1120682 A JP 1120682A JP S57168215 A JPS57168215 A JP S57168215A
Authority
JP
Japan
Prior art keywords
lens groups
lens
focal
afocal
optical system
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.)
Granted
Application number
JP1120682A
Other languages
Japanese (ja)
Other versions
JPS6119922B2 (en
Inventor
Mutsuhiko Matsuura
Fumi Hayashida
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.)
Nikon Corp
Original Assignee
Nikon Corp
Nippon Kogaku KK
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 Nikon Corp, Nippon Kogaku KK filed Critical Nikon Corp
Priority to JP1120682A priority Critical patent/JPS57168215A/en
Publication of JPS57168215A publication Critical patent/JPS57168215A/en
Publication of JPS6119922B2 publication Critical patent/JPS6119922B2/ja
Granted 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
    • G01S17/48—Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/02—Details
    • G01C3/06—Use of electric means to obtain final indication
    • G01C3/08—Use of electric radiation detectors

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Measurement Of Optical Distance (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To obtain a measuring optical system for a distance up to a target body and for its shape which forms an irradiation image of nearly constant size, by moving a light emitting lens system and a photodetecting lens system, having afocal lens groups, relatively to a light source and a detector on one stage at the same time. CONSTITUTION:In an afocal system, the focal point F1' of a lens group 7 which has focal points F1 and F1' and focal length f1, and the focal point F2 of a lens group 8 which has focal points F2 and F2' and focal length f2 are coincident with each other. When the lens groups 7 and 8 are both moved by (a) without moving an image point O', an object point O moves by {(f1/f2)<2>-1}. On this principle, a distance up to a target body and its shape are measured. In this case, light emitting lens groups made afocal are 2a and 2b, and photodetecting lens groups are 4a and 4b; and a light source 1, a detector 6, and a reflecting mirror 5 are moved in one body by said lens groups.
JP1120682A 1982-01-27 1982-01-27 Optical system having constant magnification and variable image position Granted JPS57168215A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1120682A JPS57168215A (en) 1982-01-27 1982-01-27 Optical system having constant magnification and variable image position

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1120682A JPS57168215A (en) 1982-01-27 1982-01-27 Optical system having constant magnification and variable image position

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP1347075A Division JPS5814602B2 (en) 1975-02-03 1975-02-03 KeijiyousokuteiSouchiyoukougakukei

Publications (2)

Publication Number Publication Date
JPS57168215A true JPS57168215A (en) 1982-10-16
JPS6119922B2 JPS6119922B2 (en) 1986-05-20

Family

ID=11771534

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1120682A Granted JPS57168215A (en) 1982-01-27 1982-01-27 Optical system having constant magnification and variable image position

Country Status (1)

Country Link
JP (1) JPS57168215A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62197711A (en) * 1986-02-25 1987-09-01 Kougakushiya Eng Kk Optically image forming type non-contacting position measuring apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62197711A (en) * 1986-02-25 1987-09-01 Kougakushiya Eng Kk Optically image forming type non-contacting position measuring apparatus

Also Published As

Publication number Publication date
JPS6119922B2 (en) 1986-05-20

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