GB337985A - Apparatus for determining whether there be any strain in a spectacle lens when mounted in its frame or rimless clip - Google Patents

Apparatus for determining whether there be any strain in a spectacle lens when mounted in its frame or rimless clip

Info

Publication number
GB337985A
GB337985A GB3445629A GB3445629A GB337985A GB 337985 A GB337985 A GB 337985A GB 3445629 A GB3445629 A GB 3445629A GB 3445629 A GB3445629 A GB 3445629A GB 337985 A GB337985 A GB 337985A
Authority
GB
United Kingdom
Prior art keywords
strain
rimless
clip
frame
determining whether
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
GB3445629A
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.)
Frederick Bateman & Co Ltd
Original Assignee
Frederick Bateman & Co Ltd
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 Frederick Bateman & Co Ltd filed Critical Frederick Bateman & Co Ltd
Priority to GB3445629A priority Critical patent/GB337985A/en
Publication of GB337985A publication Critical patent/GB337985A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
    • G01L1/241—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet by photoelastic stress analysis

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Eyeglasses (AREA)

Abstract

337,985. Bateman, F. W., and Bateman & Co., Ltd., F. Nov. 12, 1929. Polarizing-apparatus. - Strain in spectacle lenses is detected by examination of the lenses in polarized light. Light from a frosted electric globe is reflected from a polished black surface A being polarized thereby, and received in an analysing eyepiece K mounted on a support a. The lens to be examined is held between the eyepiece K and the plate A revealing white streaks in the parts strained. The plate A may be pivoted as shown to a wall bracket D so that it may be turned out of the way when not in use.
GB3445629A 1929-11-12 1929-11-12 Apparatus for determining whether there be any strain in a spectacle lens when mounted in its frame or rimless clip Expired GB337985A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3445629A GB337985A (en) 1929-11-12 1929-11-12 Apparatus for determining whether there be any strain in a spectacle lens when mounted in its frame or rimless clip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3445629A GB337985A (en) 1929-11-12 1929-11-12 Apparatus for determining whether there be any strain in a spectacle lens when mounted in its frame or rimless clip

Publications (1)

Publication Number Publication Date
GB337985A true GB337985A (en) 1930-11-13

Family

ID=10365867

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3445629A Expired GB337985A (en) 1929-11-12 1929-11-12 Apparatus for determining whether there be any strain in a spectacle lens when mounted in its frame or rimless clip

Country Status (1)

Country Link
GB (1) GB337985A (en)

Similar Documents

Publication Publication Date Title
US2074106A (en) Metallographic illuminating system and prism therefor
US1934582A (en) Projection apparatus
GB337985A (en) Apparatus for determining whether there be any strain in a spectacle lens when mounted in its frame or rimless clip
US1859756A (en) Eye examining instrument
GB530724A (en) Improvements in or relating to the comparative determination of the surface finish of an article
US1962834A (en) Binocular microscope
US2047561A (en) Refractometer
GB306297A (en) Improvements in or relating to holding devices for lenses, prisms and similar objects
GB257127A (en) Improvements in and relating to refractometers
GB306540A (en) Improvements in appliances for examination of the eye
SU124191A1 (en) Dual microscope with polarized optics
GB339448A (en) Apparatus for testing the amount of muscular imbalance for near vision and also for determining the amount of accommodation in the human eye
GB621048A (en) Improvements in or relating to radio receivers or similar adjustable electrical apparatus
GB478557A (en) Improvements in or relating to polarising devices
GB309938A (en) Improvements relating to attachments for lenses
GB414856A (en) Improvements in optical systems for cystoscopes and the like
SU110442A1 (en) Device for measuring the contrast of objects
GB705760A (en) Improved refractometer
GB507737A (en) Improvements in hardness testing instruments
SU55017A1 (en) Device for measuring the radii of curvature of concave spherical surfaces
GB330075A (en) Improvements in polarized light apparatus
SU60130A1 (en) The method of determining the quality of the shape of the surface of the front lens microscopic
GB393892A (en) Improvements in devices for examining the diameter of bores
GB415177A (en) Improved equipment for the recording of sound on talking picture films
SU101427A1 (en) Immersion Refractive Index Measurement Method