US4261646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beam splitter for optical player
Assignee: Universal Pioneer Corp
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Filing: 1979-06-07
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Granted: 1981-04-14
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Expires: 1999-06-07
Abstract
Abstract A beam splitter employed in an optical disc player comprises a pair of triangular prisms which are combined and adhered together to form an integral rectangular prism. The thus formed beam splitter is positioned on a metal chip whose surface is substantially rectangular having adjacent two sides projecting upward. The adjacent lower surfaces of the beam splitter fit the upward projecting sides of the metal chip and an adhesion material is coated only on the half triangular region defined by the sides and the combining line of the prisms to adhere the beam splitter to the metal chip.
Inventors
- 👤 Fumitaka Kotaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:39
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/10; G02B27/14; G02B27/144; G02B7/00; G02B7/18; G02B7/1805; G02B7/182; G11; G11B; G11B7/00; G11B7/12; G11B7/135; G11B7/1356
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
76 words
A beam splitter comprising: first and second triangular prisms, said prisms adhering together along common faces to form an integral rectangular prism having two faces bisected by the junction of said triangular prisms, a holder adapted to secure said rectangular prism to a substrate, said holder having a base section sized to conform to said rectangular prism and, only one of said triangular prisms adhering at one of said two bisected faces to said base section.
Claim 2
Dependent Claim
76 words
A beam splitter comprising: first and second triangular prisms, said prisms adhering together along common faces to form an integral rectangular prism having two faces bisected by the junction of said triangular prisms, a holder adapted to secure said rectangular prism to a substrate, said holder having a base section sized to conform to said rectangular prism and, only one of said triangular prisms adhering at one of said two bisected faces to said base section.
Claim 3
Dependent Claim
26 words
A beam splitter as in claim 1 wherein said base section of said holder has a recess extending under said common faces of said triangular prisms.
Claim 4
Dependent Claim
34 words
A beam splitter as in claims 1 or 2 wherein said holder is the same size as the base of said rectangular prism and has adjacent projecting edges contacting side of said rectangular prism.
Claim 5
Dependent Claim
21 words
The beam splitter as in claims 1 or 2 wherein said rectangular prism forms a portion of an optical disc player.
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) | 1984-04-13 | 1984-10-13 | 1985-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-13 | 1988-10-13 | 1989-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-13 | 1992-10-13 | 1993-04-14 | $7700.00 | Window Closed / Lapsed |