GB570983A - Improvements in or relating to polarizing viewing screens - Google Patents
Improvements in or relating to polarizing viewing screensInfo
- Publication number
- GB570983A GB570983A GB13783/42A GB1378342A GB570983A GB 570983 A GB570983 A GB 570983A GB 13783/42 A GB13783/42 A GB 13783/42A GB 1378342 A GB1378342 A GB 1378342A GB 570983 A GB570983 A GB 570983A
- Authority
- GB
- United Kingdom
- Prior art keywords
- visor
- polarizing
- axes
- polarizer
- lamps
- 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
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
570,983. Polarizers. INTERNATIONAL POLAROID CORPORATION. Oct. 1, 1942, No. 13783. Convention date, June 3. [Class 97 (i)] [Also in Group XXXII] A polarizing visor for use in a vehicle, which minimizes the effect of relative lateral tilting of the visor and the polarizing screen of the headlights viewed through it, is so formed and mounted that the orientation of the polarizing axis varies in a clockwise direction horizontally from left to right of the visor with respect to the driver and is substantially uniform in the vertical direction. The Figures show a visor in two positions of tilt due to road camber, the curved lines 12 representing the polarizing axes. The driver tends to maintain an upright position and so moves relatively to the visor in such a way that the oncoming lamps are seen in positions 30, 33 respectively to left and right of the centre of the visor ; in each case the tilt causes the polarizing axes 12 at the corresponding position of the visor to be substantially perpendicular to that of the polarizer of the approaching lamps. In a modification, the visor is divided into portions arranged side-by-side having their axes of polarization at different angles to the horizontal. The polarizer may comprise a suspension of oriented polarizing particles in a transparent medium, or a molecularly oriented plastic rendered dichroic as described in Specifications 548,759 or 549,698.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US570983XA | 1942-06-03 | 1942-06-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB570983A true GB570983A (en) | 1945-08-01 |
Family
ID=22008483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13783/42A Expired GB570983A (en) | 1942-06-03 | 1942-10-01 | Improvements in or relating to polarizing viewing screens |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB570983A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2306231A (en) * | 1995-10-13 | 1997-04-30 | Sharp Kk | Patterned optical polarising element |
| EP2161123A1 (en) * | 2008-09-09 | 2010-03-10 | Fujifilm Corporation | Method for producing polarizing plate, and automobile's windshield |
-
1942
- 1942-10-01 GB GB13783/42A patent/GB570983A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2306231A (en) * | 1995-10-13 | 1997-04-30 | Sharp Kk | Patterned optical polarising element |
| US5861931A (en) * | 1995-10-13 | 1999-01-19 | Sharp Kabushiki Kaisha | Patterned polarization-rotating optical element and method of making the same, and 3D display |
| EP2161123A1 (en) * | 2008-09-09 | 2010-03-10 | Fujifilm Corporation | Method for producing polarizing plate, and automobile's windshield |
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