FR2356925A1 - PROJECTION FRONTOFOCOMETER TO MEASURE IN PARTICULAR THE FOCAL POWER OF A LENS TO BE TESTED - Google Patents

PROJECTION FRONTOFOCOMETER TO MEASURE IN PARTICULAR THE FOCAL POWER OF A LENS TO BE TESTED

Info

Publication number
FR2356925A1
FR2356925A1 FR7619559A FR7619559A FR2356925A1 FR 2356925 A1 FR2356925 A1 FR 2356925A1 FR 7619559 A FR7619559 A FR 7619559A FR 7619559 A FR7619559 A FR 7619559A FR 2356925 A1 FR2356925 A1 FR 2356925A1
Authority
FR
France
Prior art keywords
frontofocometer
projection
lens
tested
measure
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
Application number
FR7619559A
Other languages
French (fr)
Other versions
FR2356925B1 (en
Inventor
Pierre Charles Paget
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
Priority to FR7619559A priority Critical patent/FR2356925A1/en
Priority to DE19762649159 priority patent/DE2649159C3/en
Priority to GB2299677A priority patent/GB1527478A/en
Priority to IT6837677A priority patent/IT1083513B/en
Priority to JP7643377A priority patent/JPS6052373B2/en
Publication of FR2356925A1 publication Critical patent/FR2356925A1/en
Application granted granted Critical
Publication of FR2356925B1 publication Critical patent/FR2356925B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02—Testing optical properties
    • G01M11/0228—Testing optical properties by measuring refractive power

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Optical Transform (AREA)

Abstract

L'invention concerne, dans un frontofocomètre à projection, des moyens pour éclairer le test et l'échelle graduée en puissance. Les moyens d'éclairage 8 comprennent, outre la source lumineuse 37 habituellement prévue, deux fibres optiques 40 et 41 réunies à une extrémité 39 et ayant leur autre extrémité 42, 43 placée respectivement à côté de l'échelle graduée 3 et à côté du test 2, et un système optique convergent 38 qui est agencé pour concentrer la lumière emise par la source 37 sur les extrémités réunies 39 des ceux fibres optiques 40 et 41. L'invention permet, avec une source unique, d'éclairer brillamment l'echelle et le test, quelle que soit la position de ce dernier.The invention relates to, in a projection frontofocometer, means for illuminating the test and the power graduated scale. The lighting means 8 comprise, in addition to the light source 37 usually provided, two optical fibers 40 and 41 joined at one end 39 and having their other end 42, 43 respectively placed next to the graduated scale 3 and next to the test. 2, and a converging optical system 38 which is arranged to concentrate the light emitted by the source 37 on the joined ends 39 of those optical fibers 40 and 41. The invention makes it possible, with a single source, to illuminate the scale brilliantly. and the test, whatever the position of the latter.

FR7619559A 1976-06-28 1976-06-28 PROJECTION FRONTOFOCOMETER TO MEASURE IN PARTICULAR THE FOCAL POWER OF A LENS TO BE TESTED Granted FR2356925A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR7619559A FR2356925A1 (en) 1976-06-28 1976-06-28 PROJECTION FRONTOFOCOMETER TO MEASURE IN PARTICULAR THE FOCAL POWER OF A LENS TO BE TESTED
DE19762649159 DE2649159C3 (en) 1976-06-28 1976-10-28 Projection lensmeter
GB2299677A GB1527478A (en) 1976-06-28 1977-05-31 Projection type focometers
IT6837677A IT1083513B (en) 1976-06-28 1977-06-14 PROJECTION FRONT PHOCOMETER
JP7643377A JPS6052373B2 (en) 1976-06-28 1977-06-27 Projection type foco for measuring the apex refractive power of a lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7619559A FR2356925A1 (en) 1976-06-28 1976-06-28 PROJECTION FRONTOFOCOMETER TO MEASURE IN PARTICULAR THE FOCAL POWER OF A LENS TO BE TESTED

Publications (2)

Publication Number Publication Date
FR2356925A1 true FR2356925A1 (en) 1978-01-27
FR2356925B1 FR2356925B1 (en) 1979-04-06

Family

ID=9174915

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7619559A Granted FR2356925A1 (en) 1976-06-28 1976-06-28 PROJECTION FRONTOFOCOMETER TO MEASURE IN PARTICULAR THE FOCAL POWER OF A LENS TO BE TESTED

Country Status (5)

Country Link
JP (1) JPS6052373B2 (en)
DE (1) DE2649159C3 (en)
FR (1) FR2356925A1 (en)
GB (1) GB1527478A (en)
IT (1) IT1083513B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994021087A1 (en) * 1993-03-01 1994-09-15 Hughes Training, Inc. A method and apparatus for aligning visual images with visual display devices

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS582880Y2 (en) * 1978-01-16 1983-01-18 株式会社 宮城建窓 Blindfold for screen door
JPS5687836A (en) * 1979-12-19 1981-07-16 Tokyo Optical Co Ltd Projection type lens meter
CN101918178B (en) 2007-11-30 2013-07-10 依视路国际集团（光学总公司） Process for controlling a lens manufacturing process

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994021087A1 (en) * 1993-03-01 1994-09-15 Hughes Training, Inc. A method and apparatus for aligning visual images with visual display devices
US5424839A (en) * 1993-03-01 1995-06-13 Hughes Training, Inc. Method and apparatus for aligning visual images with visual display devices

Also Published As

Publication number Publication date
GB1527478A (en) 1978-10-04
DE2649159A1 (en) 1977-12-29
JPS6052373B2 (en) 1985-11-19
FR2356925B1 (en) 1979-04-06
IT1083513B (en) 1985-05-21
JPS533256A (en) 1978-01-12
DE2649159B2 (en) 1978-08-10
DE2649159C3 (en) 1979-04-12

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Legal Events

Date Code Title Description
ST Notification of lapse