US4890899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color separation optical system which utilizes glass frit for bonding
Assignee: Panasonic Holdings Corp
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Filing: 1988-05-13
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Granted: 1990-01-02
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Expires: 2008-05-13
Abstract
Abstract A color separation optical system includes a set of prisms which separate incident light into components having different wavelengths. Image pickup devices may be exposed to the separated light components. An arrangement prevents or reduces the influence of a temperature variation upon color separation characteristics. The color separation optical system maybe manufactured in a new way.
Inventors
- 👤 Shinichiro Aoki
- 👤 Koichi Kawata
- 👤 Yasuyuki Morita
- 👤 Akitoshi Mori
- 👤 Yuji Hashidate
- 👤 Tatsuki Tsukada
- 👤 Hiroshi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:57
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/1006; G02B27/1013; G02B27/1073; G02B27/14; G02B27/145; H; H04; H04N; H04N23/00; H04N23/10; H04N23/13; H04N23/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
49 words
A color separation optical system comprising: (a) a set of first, second, and third prisms separating incident light into components having different wavelengths, a gap extending between the first and second prisms; (b) and means for bonding the first, second, and third prisms, the bonding means comprising glass frit.
Claim 2
Dependent Claim
49 words
A color separation optical system comprising: (a) a set of first, second, and third prisms separating incident light into components having different wavelengths, a gap extending between the first and second prisms; (b) and means for bonding the first, second, and third prisms, the bonding means comprising glass frit.
Claim 3
Dependent Claim
24 words
The optical system of claim 1 wherein opposing surfaces of the prisms have at least one cut in which the glass frit is placed.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-01 | 1993-07-03 | 1994-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-01 | 1997-07-03 | 1998-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-01 | 2001-07-03 | 2002-01-02 | $7700.00 | Window Closed / Lapsed |