DE2431263C3 - Sehzeichenprojektor für Augenuntersuchungen - Google Patents

Sehzeichenprojektor für Augenuntersuchungen

Info

Publication number
DE2431263C3
DE2431263C3 DE2431263A DE2431263A DE2431263C3 DE 2431263 C3 DE2431263 C3 DE 2431263C3 DE 2431263 A DE2431263 A DE 2431263A DE 2431263 A DE2431263 A DE 2431263A DE 2431263 C3 DE2431263 C3 DE 2431263C3
Authority
DE
Germany
Prior art keywords
test
disk
disc
projector according
microswitch
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
DE2431263A
Other languages
German (de)
English (en)
Other versions
DE2431263B2 (de
DE2431263A1 (de
Inventor
Pierre Charles Ligny-En- Barrois Paget (Frankreich)
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.)
EssilorLuxottica SA
Original Assignee
Essilor International Compagnie Generale dOptique SA
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 Essilor International Compagnie Generale dOptique SA filed Critical Essilor International Compagnie Generale dOptique SA
Publication of DE2431263A1 publication Critical patent/DE2431263A1/de
Publication of DE2431263B2 publication Critical patent/DE2431263B2/de
Application granted granted Critical
Publication of DE2431263C3 publication Critical patent/DE2431263C3/de
Expired 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)
  • Eye Examination Apparatus (AREA)
  • Projection Apparatus (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
DE2431263A 1973-06-29 1974-06-28 Sehzeichenprojektor für Augenuntersuchungen Expired DE2431263C3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7323859A FR2235627A5 (enExample) 1973-06-29 1973-06-29

Publications (3)

Publication Number Publication Date
DE2431263A1 DE2431263A1 (de) 1975-01-23
DE2431263B2 DE2431263B2 (de) 1977-09-01
DE2431263C3 true DE2431263C3 (de) 1978-04-20

Family

ID=9121777

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2431263A Expired DE2431263C3 (de) 1973-06-29 1974-06-28 Sehzeichenprojektor für Augenuntersuchungen

Country Status (6)

Country Link
US (1) US3947098A (enExample)
JP (1) JPS5323160B2 (enExample)
DE (1) DE2431263C3 (enExample)
FR (1) FR2235627A5 (enExample)
GB (1) GB1448755A (enExample)
IT (1) IT1015381B (enExample)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD245863S (en) 1976-02-05 1977-09-20 American Optical Corporation Ophthalmic instrument control board
US4161353A (en) * 1977-07-22 1979-07-17 Herman Centner Secondary image reproduction device
US5302982A (en) * 1993-02-23 1994-04-12 Woodlyn Inc. Projector slide apparatus
US6425665B2 (en) * 2000-03-31 2002-07-30 Nidek Co., Ltd. Visual acuity examination apparatus
JP4970122B2 (ja) * 2007-04-20 2012-07-04 株式会社ニデック 視力検査装置
CN109864698B (zh) * 2019-04-04 2021-06-08 河南师范大学 一种便携式视力测试仪
CN110244456A (zh) * 2019-07-16 2019-09-17 江南大学 一种视觉流测量装置及其使用方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1797544A (en) * 1928-05-21 1931-03-24 William J Cameron Optical apparatus
US3655276A (en) * 1969-10-31 1972-04-11 American Optical Corp Ophthalmic refracting chart projector

Also Published As

Publication number Publication date
US3947098A (en) 1976-03-30
GB1448755A (en) 1976-09-08
JPS5037293A (enExample) 1975-04-07
JPS5323160B2 (enExample) 1978-07-13
DE2431263B2 (de) 1977-09-01
FR2235627A5 (enExample) 1975-01-24
DE2431263A1 (de) 1975-01-23
IT1015381B (it) 1977-05-10

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
EGA New person/name/address of the applicant
8339 Ceased/non-payment of the annual fee