Prism light guide having surfaces which are in octature
US4260220A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 1979 |
| Grant date | Apr 7, 1981 |
| Priority date | — |
| Expiry date | Jun 15, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/032
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The prism light guide is a longitudinal hollow structure made of transparent dielectric material. The structure has substantially planar inner and outer surfaces which are in "octature". The hollow structure is formed of one or more longitudinal sections which may be bonded together with an adhesive having a refractive index similar to the refractive index of the sections. The cross-section of each section is preferably constant along the length of the section, and the surfaces in each section are flat and polished smooth. One preferred light guide includes a rectangular or square hollow structure made of four longitudinal wall sections bonded together. Each wall section has a planar inner surface and an outer surface having 90.degree. angle longitudinal corrugations. The dielectric material is acrylic plastic or optically clear glass and the light guide includes an outer jacket for protecting the outer surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.