GB730640A - Improvements in or relating to optical devices incorporating eye-protective filters - Google Patents
Improvements in or relating to optical devices incorporating eye-protective filtersInfo
- 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
Links
- 230000003287 optical effect Effects 0.000 title 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 2
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 abstract 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000002310 reflectometry Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 230000003595 spectral effect Effects 0.000 abstract 1
- 239000004408 titanium dioxide Substances 0.000 abstract 1
- 238000001429 visible spectrum Methods 0.000 abstract 1
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.
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)
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 |
-
1951
- 1951-04-09 GB GB8195/51A patent/GB730640A/en not_active Expired
Cited By (3)
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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