Thin film beamsplitter optical element for use in an image-forming lens system
US4896952A · kind A · utility
28Cited by
6References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1988 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Apr 22, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/70225
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A beamsplitter optical element, including a triangular substrate, such as a prism, having a plane face corresponding to the hypotenuse of the prism which is coated with a thin film structure having materials and thicknesses, which effect a division of each light beam such as into a reflected and a transmitted portion, in such a way that the beams suffer no net aberration as a result of multiple reflections within the thin film structure, and a second triangular substrate, such as a prism having a plane face, corresponding to the hypotenuse, optically bonded to the thin film structure deposited on the hypotenuse of the first prism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.