FR2371910A1 - - Google Patents

Info

Publication number
FR2371910A1
FR2371910A1 FR7728866A FR7728866A FR2371910A1 FR 2371910 A1 FR2371910 A1 FR 2371910A1 FR 7728866 A FR7728866 A FR 7728866A FR 7728866 A FR7728866 A FR 7728866A FR 2371910 A1 FR2371910 A1 FR 2371910A1
Authority
FR
France
Prior art keywords
disc
character
rotation
shortest path
assigned
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
FR7728866A
Other languages
English (en)
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 FR2371910A1 publication Critical patent/FR2371910A1/fr
Pending 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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/42—Servomotor, servo controller kind till VSS
    • G05B2219/42212—Rotation over, selection of smallest, shortest angle, distance

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Eye Examination Apparatus (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Projection Apparatus (AREA)
  • Details Of Television Systems (AREA)
FR7728866A 1976-11-25 1977-09-26 Pending FR2371910A1 (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762653471 DE2653471C3 (de) 1976-11-25 1976-11-25 Projektor zum Projizieren von Testdarstellungen für Augenuntersuchungen

Publications (1)

Publication Number Publication Date
FR2371910A1 true FR2371910A1 (it) 1978-06-23

Family

ID=5993908

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7728866A Pending FR2371910A1 (it) 1976-11-25 1977-09-26

Country Status (8)

Country Link
JP (1) JPS5367988A (it)
CH (1) CH624566A5 (it)
DD (1) DD132921A1 (it)
DE (1) DE2653471C3 (it)
ES (1) ES462864A1 (it)
FR (1) FR2371910A1 (it)
GB (1) GB1538630A (it)
IT (1) IT1106647B (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058516A2 (en) * 1981-02-13 1982-08-25 Clement Clarke International Limited Ophthalmic instruments

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6219144A (ja) * 1985-07-17 1987-01-27 株式会社トプコン山形 検眼チヤ−ト投影機
CN109512377B (zh) * 2018-10-25 2021-05-25 陕西省人民医院 一种红绿色盲疾病检查盘

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058516A2 (en) * 1981-02-13 1982-08-25 Clement Clarke International Limited Ophthalmic instruments
EP0058516A3 (en) * 1981-02-13 1983-04-20 Clement Clarke International Limited Ophthalmic instruments

Also Published As

Publication number Publication date
JPS6120292B2 (it) 1986-05-21
IT1106647B (it) 1985-11-11
JPS5367988A (en) 1978-06-16
DE2653471C3 (de) 1979-10-31
GB1538630A (en) 1979-01-24
CH624566A5 (en) 1981-08-14
DE2653471B2 (de) 1979-03-15
DD132921A1 (de) 1978-11-22
ES462864A1 (es) 1978-06-01
DE2653471A1 (de) 1978-06-01

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