FR2421592A1 - Systeme optique a refracteur - Google Patents
Systeme optique a refracteurInfo
- Publication number
- FR2421592A1 FR2421592A1 FR7908719A FR7908719A FR2421592A1 FR 2421592 A1 FR2421592 A1 FR 2421592A1 FR 7908719 A FR7908719 A FR 7908719A FR 7908719 A FR7908719 A FR 7908719A FR 2421592 A1 FR2421592 A1 FR 2421592A1
- Authority
- FR
- France
- Prior art keywords
- optical system
- lenses
- additive
- refractor
- refractor optical
- 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.)
- Granted
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
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Animal Behavior & Ethology (AREA)
- Ophthalmology & Optometry (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Biophysics (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Lenses (AREA)
- Prostheses (AREA)
- Eye Examination Apparatus (AREA)
- Eyeglasses (AREA)
Abstract
L'invention concerne un système réfracteur optique ayant une série de lentilles sphériques et cylindriques qui éliminent substantiellement l'apparition irrégulière d'erreurs additives quand des lentilles espacées du plan de référence sont utilisées ou plus que 2 lentilles sont combinées et permet la correction d'erreurs additives significatives par une sélection non-additive de lentilles.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/894,455 US4215919A (en) | 1978-04-07 | 1978-04-07 | Refractor optical system |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2421592A1 true FR2421592A1 (fr) | 1979-11-02 |
FR2421592B1 FR2421592B1 (fr) | 1984-08-24 |
Family
ID=25403098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7908719A Granted FR2421592A1 (fr) | 1978-04-07 | 1979-04-06 | Systeme optique a refracteur |
Country Status (11)
Country | Link |
---|---|
US (1) | US4215919A (fr) |
JP (1) | JPS54139745A (fr) |
AU (1) | AU521562B2 (fr) |
BR (1) | BR7902138A (fr) |
CA (1) | CA1112924A (fr) |
CH (1) | CH642530A5 (fr) |
DE (1) | DE2913001A1 (fr) |
FR (1) | FR2421592A1 (fr) |
GB (1) | GB2018461B (fr) |
HK (1) | HK18085A (fr) |
NL (1) | NL7902639A (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4820040A (en) * | 1984-11-09 | 1989-04-11 | Sims Clinton N | Crossed cylinder lenses refractor and method of use |
US4840479A (en) * | 1984-11-09 | 1989-06-20 | Sims Clinton N | Crossed cylinder lenses refractor with three-lens variable crossed cylinder assembly and method of use |
US5285224A (en) * | 1984-11-09 | 1994-02-08 | Sims Clinton N | Methods and apparatus for determining refractive error |
US5430508A (en) * | 1984-11-09 | 1995-07-04 | Sims; Clinton N. | Refraction techniques using modified streak retinoscope assembly |
US4943162A (en) * | 1984-11-09 | 1990-07-24 | Sims Clinton N | Astigmatic self-refractor and method of use |
US5120124A (en) * | 1984-11-09 | 1992-06-09 | Sims Clinton N | Devices for determining the crossed cylinder powers and axes for multiple lens sets |
US5500698A (en) * | 1984-11-09 | 1996-03-19 | Sims; Clinton N. | Optical instruments such as retinoscopes which may incorporate multiple lens assemblies and methods of calibrating such instruments |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1455457A (en) * | 1919-09-05 | 1923-05-15 | American Optical Corp | Trial lens |
US2266797A (en) * | 1939-04-06 | 1941-12-23 | American Optical Corp | Eye testing instrument |
GB821722A (en) * | 1956-01-13 | 1959-10-14 | Pierre Andre Marly | Sight-testing apparatus |
GB947359A (en) * | 1961-11-23 | 1964-01-22 | Rudolf Rodenstock | Indicating means for phoropters |
US3498699A (en) * | 1967-06-13 | 1970-03-03 | American Optical Corp | Refractor |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1265671A (en) * | 1916-10-09 | 1918-05-07 | Bausch & Lomb | Ophthalmic test-lens set. |
-
1978
- 1978-04-07 US US05/894,455 patent/US4215919A/en not_active Expired - Lifetime
-
1979
- 1979-03-28 CA CA324,311A patent/CA1112924A/fr not_active Expired
- 1979-03-30 AU AU45627/79A patent/AU521562B2/en not_active Ceased
- 1979-03-31 DE DE19792913001 patent/DE2913001A1/de not_active Ceased
- 1979-04-03 GB GB7911637A patent/GB2018461B/en not_active Expired
- 1979-04-04 NL NL7902639A patent/NL7902639A/xx not_active Application Discontinuation
- 1979-04-06 CH CH325379A patent/CH642530A5/de not_active IP Right Cessation
- 1979-04-06 FR FR7908719A patent/FR2421592A1/fr active Granted
- 1979-04-06 JP JP4115379A patent/JPS54139745A/ja active Pending
- 1979-04-06 BR BR7902138A patent/BR7902138A/pt unknown
-
1985
- 1985-03-14 HK HK180/85A patent/HK18085A/xx unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1455457A (en) * | 1919-09-05 | 1923-05-15 | American Optical Corp | Trial lens |
US2266797A (en) * | 1939-04-06 | 1941-12-23 | American Optical Corp | Eye testing instrument |
GB821722A (en) * | 1956-01-13 | 1959-10-14 | Pierre Andre Marly | Sight-testing apparatus |
GB947359A (en) * | 1961-11-23 | 1964-01-22 | Rudolf Rodenstock | Indicating means for phoropters |
US3498699A (en) * | 1967-06-13 | 1970-03-03 | American Optical Corp | Refractor |
Also Published As
Publication number | Publication date |
---|---|
CH642530A5 (de) | 1984-04-30 |
BR7902138A (pt) | 1979-12-04 |
US4215919A (en) | 1980-08-05 |
CA1112924A (fr) | 1981-11-24 |
GB2018461B (en) | 1983-02-09 |
AU4562779A (en) | 1979-10-11 |
FR2421592B1 (fr) | 1984-08-24 |
HK18085A (en) | 1985-03-22 |
GB2018461A (en) | 1979-10-17 |
AU521562B2 (en) | 1982-04-08 |
NL7902639A (nl) | 1979-10-09 |
JPS54139745A (en) | 1979-10-30 |
DE2913001A1 (de) | 1980-03-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TP | Transmission of property | ||
ST | Notification of lapse |