WIDE ANGLE OPTICAL FILTERS
Assignee
GTE PRODUCTS CORPORATION, A DE CORP.
Filed
Mar 29, 1988
Granted
Aug 8, 1989
Location
SALEM MA US
Abstract
A thin-film optical interference filter designed and manufactured to have high transmission of blue light and high reflectance of infrared light. The novel feature of this filter rests in the thin-film layer design at the top and bottom of a quarterwave stack and the manufacturing technique by which this thin-film design is deposited. The thin-film layer design suppresses the so called halfwave holes which occur at wide angles of incidence of the incoming light. This desirable effect is achieved by the proper layer thickness and refractive index control in the manufacturing process.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Oct 11, 1988
Rescinded
Mar 27, 1989
Duration
5 months
Inventor
- 1CHARLES E. MELLOR
Record Details
- Patent number
- US 4854670
- Application
- 00717879
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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