CA1009072A - Method for determining the position of a focussing plane - Google Patents

Method for determining the position of a focussing plane

Info

Publication number
CA1009072A
CA1009072A CA202,631A CA202631A CA1009072A CA 1009072 A CA1009072 A CA 1009072A CA 202631 A CA202631 A CA 202631A CA 1009072 A CA1009072 A CA 1009072A
Authority
CA
Canada
Prior art keywords
determining
focussing plane
focussing
plane
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.)
Expired
Application number
CA202,631A
Other versions
CA202631S (en
Inventor
Klaus D. Schaefer
Eckart Schneider
Ludwig Leitz
Knut Heitmann
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.)
Ernst Leitz Wetzlar GmbH
Original Assignee
Ernst Leitz GmbH
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
Priority claimed from DE19732330940 external-priority patent/DE2330940C3/en
Application filed by Ernst Leitz GmbH filed Critical Ernst Leitz GmbH
Application granted granted Critical
Publication of CA1009072A publication Critical patent/CA1009072A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/34—Systems for automatic generation of focusing signals using different areas in a pupil plane
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/40—Optical focusing aids
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/46—Systems using spatial filters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B21/00—Teaching, or communicating with, the blind, deaf or mute
    • G09B21/001—Teaching or communicating with blind persons
    • G09B21/003—Teaching or communicating with blind persons using tactile presentation of the information, e.g. Braille displays

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • General Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Theoretical Computer Science (AREA)
  • Measurement Of Optical Distance (AREA)
  • Length Measuring Devices By Optical Means (AREA)
CA202,631A 1973-06-18 1974-06-17 Method for determining the position of a focussing plane Expired CA1009072A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732330940 DE2330940C3 (en) 1973-06-18 Method and device for photoelectrically determining the position of at least one focal plane of an image

Publications (1)

Publication Number Publication Date
CA1009072A true CA1009072A (en) 1977-04-26

Family

ID=5884325

Family Applications (1)

Application Number Title Priority Date Filing Date
CA202,631A Expired CA1009072A (en) 1973-06-18 1974-06-17 Method for determining the position of a focussing plane

Country Status (7)

Country Link
CA (1) CA1009072A (en)
CH (1) CH601773A5 (en)
FR (1) FR2233640B1 (en)
GB (1) GB1472454A (en)
IT (1) IT1011983B (en)
NL (1) NL182100C (en)
SE (1) SE399126B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2315706A1 (en) * 1975-06-26 1977-01-21 Leitz Ernst Gmbh METHOD AND DEVICE FOR AUTOMATIC FOCUSING OF AN OPTICAL APPARATUS INCLUDING A DETECTION NETWORK
DE2813905A1 (en) * 1977-04-05 1978-10-12 Georges Ducommun AID DEVICE FOR DETECTING THE SURROUNDINGS BY THE BLIND OR VISUALLY IMPAIRED PERSONS
DE3039425A1 (en) * 1980-10-18 1982-05-19 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar DEVICE FOR PHOTOELECTRICALLY DETERMINING THE POSITION OF AT LEAST ONE FOCUS OF AN IMAGE
US4310227A (en) * 1981-01-05 1982-01-12 Polaroid Corporation Diffracted energy auto-ranging system for a camera
DE3233013A1 (en) * 1982-09-06 1984-03-08 Siemens AG, 1000 Berlin und 8000 München OPTICAL ARRANGEMENT FOR DETECTING AND EVALUATING THE LOCATION OF AN OBJECT
DE3706286A1 (en) * 1987-02-26 1988-09-08 Friedrich Horst Ing Papenmeier ELECTROMECHANICAL BRAILLE LINE

Also Published As

Publication number Publication date
FR2233640B1 (en) 1978-11-17
NL7408136A (en) 1974-12-20
NL182100C (en) 1988-01-04
IT1011983B (en) 1977-02-10
CH601773A5 (en) 1978-07-14
SE7407984L (en) 1974-12-19
DE2330940B2 (en) 1976-01-02
FR2233640A1 (en) 1975-01-10
GB1472454A (en) 1977-05-04
DE2330940A1 (en) 1975-01-02
SE399126B (en) 1978-01-30

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