[go: up one dir, main page]

GB1527478A - Projection type focometers - Google Patents

Projection type focometers

Info

Publication number
GB1527478A
GB1527478A GB2299677A GB2299677A GB1527478A GB 1527478 A GB1527478 A GB 1527478A GB 2299677 A GB2299677 A GB 2299677A GB 2299677 A GB2299677 A GB 2299677A GB 1527478 A GB1527478 A GB 1527478A
Authority
GB
United Kingdom
Prior art keywords
screen
lens
lenses
branch
image
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
GB2299677A
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 GB1527478A publication Critical patent/GB1527478A/en
Expired 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

1527478 Measuring lens power ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE) 31 May 1977 [28 June 1976] 22996/77 Heading G2J In projection apparatus for measuring the power of a lens 6 to be tested, light from a lamp 37 and a condenser 38 converges on the end 39 of an optical fibre bundle having two branches 40, 41. Branch 41 is rotatably connected to a body 28 which is mounted for axial movement and rotation, and which carries a test object as the form of a cross Z. An image of the cross is formed on a screen 4 by lenses 9, 10, lens 6 under test, lenses 11, 12, and mirrors 13, 14, 15, 16. Branch 40 illuminates a graduated screen 3 movable with body Z8 parallel to its axis, and an image of screen 3 is formed on screen 4 by a fixed reflecting prism 18, lens 19 and mirror 20, superimposed on reference marks on screen 4.
GB2299677A 1976-06-28 1977-05-31 Projection type focometers Expired GB1527478A (en)

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 (1)

Publication Number Publication Date
GB1527478A true GB1527478A (en) 1978-10-04

Family

ID=9174915

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2299677A Expired GB1527478A (en) 1976-06-28 1977-05-31 Projection type focometers

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
US8721076B2 (en) 2007-11-30 2014-05-13 Essilor International (Compagnie Generale D'optique) Process for controlling a lens manufacturing process

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
US5424839A (en) * 1993-03-01 1995-06-13 Hughes Training, Inc. Method and apparatus for aligning visual images with visual display devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8721076B2 (en) 2007-11-30 2014-05-13 Essilor International (Compagnie Generale D'optique) Process for controlling a lens manufacturing process

Also Published As

Publication number Publication date
JPS6052373B2 (en) 1985-11-19
DE2649159A1 (en) 1977-12-29
IT1083513B (en) 1985-05-21
FR2356925A1 (en) 1978-01-27
FR2356925B1 (en) 1979-04-06
JPS533256A (en) 1978-01-12
DE2649159B2 (en) 1978-08-10
DE2649159C3 (en) 1979-04-12

Similar Documents

Publication Publication Date Title
GB1527478A (en) Projection type focometers
DE3775040D1 (en) DEVICE FOR MEASURING THE REFLECTION PROPERTIES OF EYE GLASSES.
GB1477178A (en) Digital indicating lens meters
US5088203A (en) Method and apparatus for eye glasses position measurement system and/or for vertex measurement system
GB1514802A (en) Combined slit lamp and microscopes
GB1268244A (en) Optical device for testing eyes
GB1450783A (en) Perimetric instrument for determining the limits of the visual field
JPS57197415A (en) Range finder
SU1084597A1 (en) Interferometer for checking concave ellypsoids of revolution
SU954813A1 (en) Device for measuring part deformation
GB570022A (en) A projection system for the inspection of internal surfaces
JPS5714815A (en) Optical microscopic device
SU503125A1 (en) Device for monitoring optical surfaces of large parts
SU844995A1 (en) Interferometer for inspection of article surface
SU1525447A1 (en) Flexometer
GB895336A (en) Scale-reading device for measuring scales
SU413368A1 (en)
GR3008106T3 (en)
SU913319A1 (en) Device for mark guiding
SU1539718A1 (en) Optical system for microprojection device
SU1490464A1 (en) Projector for measuring crystal cross-section parameters
SU750273A1 (en) Microinterferometer for surface roughness monitoring
SU100704A1 (en) Contactless interference indicator
SU589960A1 (en) Device for registering angles of rotation of the eye
SU1231400A1 (en) Interferometer for inspecting quality of plane surfaces

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920531