FR2233640B1 - - Google Patents

Info

Publication number
FR2233640B1
FR2233640B1 FR7421001A FR7421001A FR2233640B1 FR 2233640 B1 FR2233640 B1 FR 2233640B1 FR 7421001 A FR7421001 A FR 7421001A FR 7421001 A FR7421001 A FR 7421001A FR 2233640 B1 FR2233640 B1 FR 2233640B1
Authority
FR
France
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
FR7421001A
Other languages
French (fr)
Other versions
FR2233640A1 (en
Inventor
Ludwig Leitz
Knut Heitmann
Eckart Schneider
Klaus D Schaefer
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 Wetzlar 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 Wetzlar GmbH filed Critical Ernst Leitz Wetzlar GmbH
Publication of FR2233640A1 publication Critical patent/FR2233640A1/fr
Application granted granted Critical
Publication of FR2233640B1 publication Critical patent/FR2233640B1/fr
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)
FR7421001A 1973-06-18 1974-06-17 Expired FR2233640B1 (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 (2)

Publication Number Publication Date
FR2233640A1 FR2233640A1 (en) 1975-01-10
FR2233640B1 true FR2233640B1 (en) 1978-11-17

Family

ID=5884325

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7421001A Expired FR2233640B1 (en) 1973-06-18 1974-06-17

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
NL182100C (en) 1988-01-04
CH601773A5 (en) 1978-07-14
FR2233640A1 (en) 1975-01-10
GB1472454A (en) 1977-05-04
DE2330940B2 (en) 1976-01-02
DE2330940A1 (en) 1975-01-02
CA1009072A (en) 1977-04-26
IT1011983B (en) 1977-02-10
NL7408136A (en) 1974-12-20
SE7407984L (en) 1974-12-19
SE399126B (en) 1978-01-30

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Legal Events

Date Code Title Description
ST Notification of lapse