FR2287200A1 - Reference figure projector for eye testing - has keyboard to position support carrying figures - Google Patents

Reference figure projector for eye testing - has keyboard to position support carrying figures

Info

Publication number
FR2287200A1
FR2287200A1 FR7531032A FR7531032A FR2287200A1 FR 2287200 A1 FR2287200 A1 FR 2287200A1 FR 7531032 A FR7531032 A FR 7531032A FR 7531032 A FR7531032 A FR 7531032A FR 2287200 A1 FR2287200 A1 FR 2287200A1
Authority
FR
France
Prior art keywords
keyboard
projector
position support
support carrying
eye testing
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.)
Withdrawn
Application number
FR7531032A
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.)
Optische Werke G Rodenstock
Original Assignee
Optische Werke G Rodenstock
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 Optische Werke G Rodenstock filed Critical Optische Werke G Rodenstock
Publication of FR2287200A1 publication Critical patent/FR2287200A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
    • A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
    • A61B3/032—Devices for presenting test symbols or characters, e.g. test chart projectors

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Machine Translation (AREA)
  • Character Discrimination (AREA)
  • Push-Button Switches (AREA)

Abstract

The projector displays reference figures, of which there are a number on a support movable in stages by a remote control. The latter is in the form of a conventional keyboard, operating by simple contact. There can be one key for each reference figure, marked with the figure concerned, and the one belonging to a projected figure can emit a light signal. The keyboard can also include keys controlling the placement of filters in the path of the light beam, rotation of a prism etc. The design combines compactness with reliability and light weight as compared with conventional designs.
FR7531032A 1974-10-11 1975-10-10 Reference figure projector for eye testing - has keyboard to position support carrying figures Withdrawn FR2287200A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE7434126 1974-10-11

Publications (1)

Publication Number Publication Date
FR2287200A1 true FR2287200A1 (en) 1976-05-07

Family

ID=6646976

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7531032A Withdrawn FR2287200A1 (en) 1974-10-11 1975-10-10 Reference figure projector for eye testing - has keyboard to position support carrying figures

Country Status (2)

Country Link
ES (1) ES215228Y (en)
FR (1) FR2287200A1 (en)

Also Published As

Publication number Publication date
ES215228U (en) 1976-07-16
ES215228Y (en) 1976-12-01

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Legal Events

Date Code Title Description
ST Notification of lapse