GB257507A - Improvements in anti-glare devices - Google Patents

Improvements in anti-glare devices

Info

Publication number
GB257507A
GB257507A GB612126A GB612126A GB257507A GB 257507 A GB257507 A GB 257507A GB 612126 A GB612126 A GB 612126A GB 612126 A GB612126 A GB 612126A GB 257507 A GB257507 A GB 257507A
Authority
GB
United Kingdom
Prior art keywords
plano
glass
absorbing power
lens
light
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
GB612126A
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.)
ROBERT CASTELNAU
Original Assignee
ROBERT CASTELNAU
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 ROBERT CASTELNAU filed Critical ROBERT CASTELNAU
Priority to GB612126A priority Critical patent/GB257507A/en
Publication of GB257507A publication Critical patent/GB257507A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

257,507. Castelnau, R. March 4, 1926. Anti-dazzle screens. - A lightabsorbing system for diminishing the glare from approaching light has increasing absorbing power from the centre to its periphery. As shown, a plano-convex lens N of non-absorbent glass is combined with a plano-concave lens A of absorbent glass. The refractive indices of the glasses may be the same or different, and the central portion of the lens system may be perfectly clear. The device may comprise a single plane sheet of glass, celluloid, &c., having gradually increasing absorbing power, and may be mounted in goggles or in any convenient way between the light and the person affected.
GB612126A 1926-03-04 1926-03-04 Improvements in anti-glare devices Expired GB257507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB612126A GB257507A (en) 1926-03-04 1926-03-04 Improvements in anti-glare devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB612126A GB257507A (en) 1926-03-04 1926-03-04 Improvements in anti-glare devices

Publications (1)

Publication Number Publication Date
GB257507A true GB257507A (en) 1926-09-02

Family

ID=9808776

Family Applications (1)

Application Number Title Priority Date Filing Date
GB612126A Expired GB257507A (en) 1926-03-04 1926-03-04 Improvements in anti-glare devices

Country Status (1)

Country Link
GB (1) GB257507A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446843A (en) * 1945-01-03 1948-08-10 Bendix Aviat Corp Lens and filter for cameras
GB2242541A (en) * 1990-03-30 1991-10-02 Asahi Optical Co Ltd Cemented lens and process for production thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446843A (en) * 1945-01-03 1948-08-10 Bendix Aviat Corp Lens and filter for cameras
GB2242541A (en) * 1990-03-30 1991-10-02 Asahi Optical Co Ltd Cemented lens and process for production thereof
GB2242541B (en) * 1990-03-30 1994-02-16 Asahi Optical Co Ltd Cemented lens and process for production thereof
USRE36049E (en) * 1990-03-30 1999-01-19 Asahi Kogaku Kogyo Kabushiki Kaisha Cemented lens and process for production thereof

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