GB730640A - Improvements in or relating to optical devices incorporating eye-protective filters - Google Patents

Improvements in or relating to optical devices incorporating eye-protective filters

Info

Publication number
GB730640A
GB730640A GB8195/51A GB819551A GB730640A GB 730640 A GB730640 A GB 730640A GB 8195/51 A GB8195/51 A GB 8195/51A GB 819551 A GB819551 A GB 819551A GB 730640 A GB730640 A GB 730640A
Authority
GB
United Kingdom
Prior art keywords
april
eye
relating
refractive index
optical devices
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
GB8195/51A
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.)
ALOIS VOGT DR MG
Original Assignee
ALOIS VOGT DR MG
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 ALOIS VOGT DR MG filed Critical ALOIS VOGT DR MG
Publication of GB730640A publication Critical patent/GB730640A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/281—Interference filters designed for the infrared light
    • G02B5/282—Interference filters designed for the infrared light reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Filters (AREA)

Abstract

730,640. Light-filters. VOGT, A. April 9, 1951 [April 8, 1950; April 8, 1950], No. 8195/51. Drawings to Specification. Class 97 (1). An eye-protective device comprises a lighttransparent carrier in the form of a spectacle lens, goggles or the cover-plate of high-intensity light sources coated with a multilayer interference filter comprising superimposed layers alternately of high and low refractive index, each layer being substantially of a thickness equal to the. quotient of the wavelength corresponding to the maximum of the eye sensitivity curve and twice the refractive index of the material of that layer, so that the device has a high transparency for the whole of the visible spectrum and a high reflectivity for the adjacent infra-red and ultra-violet spectral regions. The layers may be of titanium dioxide and magnesium fluoride, a total of at least six being employed.
GB8195/51A 1950-04-08 1951-04-09 Improvements in or relating to optical devices incorporating eye-protective filters Expired GB730640A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH730640X 1950-04-08

Publications (1)

Publication Number Publication Date
GB730640A true GB730640A (en) 1955-05-25

Family

ID=4532333

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8195/51A Expired GB730640A (en) 1950-04-08 1951-04-09 Improvements in or relating to optical devices incorporating eye-protective filters

Country Status (1)

Country Link
GB (1) GB730640A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269267A (en) * 1962-11-19 1966-08-30 Ncr Co Sunglasses with aligned infra-red, photochromic and ultraviolet filters
US3410625A (en) * 1963-08-05 1968-11-12 Monsanto Co Multi-layer interference film with outermost layer for suppression of pass-band reflectance
US4198714A (en) * 1977-05-06 1980-04-22 Jensen Ronald P Intraocular lens for implantation into the posterior chamber of a human eye

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269267A (en) * 1962-11-19 1966-08-30 Ncr Co Sunglasses with aligned infra-red, photochromic and ultraviolet filters
US3410625A (en) * 1963-08-05 1968-11-12 Monsanto Co Multi-layer interference film with outermost layer for suppression of pass-band reflectance
US4198714A (en) * 1977-05-06 1980-04-22 Jensen Ronald P Intraocular lens for implantation into the posterior chamber of a human eye

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