FR2452725A2 - Determining rotation of digital auto-collimator - uses internal mirrors to direct return image over photodiode detector array - Google Patents

Determining rotation of digital auto-collimator - uses internal mirrors to direct return image over photodiode detector array

Info

Publication number
FR2452725A2
FR2452725A2 FR7907967A FR7907967A FR2452725A2 FR 2452725 A2 FR2452725 A2 FR 2452725A2 FR 7907967 A FR7907967 A FR 7907967A FR 7907967 A FR7907967 A FR 7907967A FR 2452725 A2 FR2452725 A2 FR 2452725A2
Authority
FR
France
Prior art keywords
collimator
fixed
return image
detector array
image over
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
FR7907967A
Other languages
French (fr)
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.)
Barbier Benard & Turenne
Original Assignee
Barbier Benard & Turenne
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 Barbier Benard & Turenne filed Critical Barbier Benard & Turenne
Priority to FR7907967A priority Critical patent/FR2452725A2/en
Publication of FR2452725A2 publication Critical patent/FR2452725A2/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

An auto collimator has a return image position detector comprising a network of photodiodes. The angle of rotation is determined by counting the pulses from the origin and to the final pulse from the photodiode network as internal mirrors rotate. A lens (1) has a plane mirror (2a) located at the mid focal distance. This is located inside the auto collimator and is rigidly fixed to a structure (26) which is rotated. The axis of the structure is orthogonal to the optical axis (X-X) and a second plane mirror (3a) is similarly fixed to a second structure (3b) external to the auto collimator. The lens (1) is fixed to an optical assembly (4) comprising a Lummer cube whose semi transparent face (6) is parallel to a prism mirror (5). A fixed slit (7) is illuminated by a lamp and the light reflected from the mirrors is sensed by a photodiode array (8) for digital processing.
FR7907967A 1979-03-29 1979-03-29 Determining rotation of digital auto-collimator - uses internal mirrors to direct return image over photodiode detector array Pending FR2452725A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7907967A FR2452725A2 (en) 1979-03-29 1979-03-29 Determining rotation of digital auto-collimator - uses internal mirrors to direct return image over photodiode detector array

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7907967A FR2452725A2 (en) 1979-03-29 1979-03-29 Determining rotation of digital auto-collimator - uses internal mirrors to direct return image over photodiode detector array

Publications (1)

Publication Number Publication Date
FR2452725A2 true FR2452725A2 (en) 1980-10-24

Family

ID=9223721

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7907967A Pending FR2452725A2 (en) 1979-03-29 1979-03-29 Determining rotation of digital auto-collimator - uses internal mirrors to direct return image over photodiode detector array

Country Status (1)

Country Link
FR (1) FR2452725A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113324514A (en) * 2021-05-21 2021-08-31 安徽创谱仪器科技有限公司 Rotating shaft debugging method and debugging assembly

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2034786A1 (en) * 1969-03-10 1970-12-18 Leitz Ernst Gmbh

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2034786A1 (en) * 1969-03-10 1970-12-18 Leitz Ernst Gmbh

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LA MACHINE MODERNE, vol. 48, no. 7, juillet 1954, pages 7-10, Paris, FR. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113324514A (en) * 2021-05-21 2021-08-31 安徽创谱仪器科技有限公司 Rotating shaft debugging method and debugging assembly

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