Patent US4691982A successfully refreshed from Google Patents.
US4691982A
Expired / Lapsed
US
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Optical coupler
Assignee: Canon Inc
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Filing: 1985-03-07
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Granted: 1987-09-08
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Expires: 2005-03-07
Abstract
Abstract An optical coupler of good efficiency can be prepared at a low cost by making an optical waveguide and a grating of the optical coupler of a monomolecular layer or a monomolecular built-up film.
Inventors
- 👤 Yukuo Nishimura
- 👤 Mamoru Miyawaki
- 👤 Noriyuki Nose
- 👤 Takashi Nakagiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:11
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/122; G02B6/124; G02B6/24; G02B6/26; G02B6/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
An optical coupler which comprises an optical waveguide with a flat grating included therein, and a substrate on which the waveguide is formed, the optical waveguide being comprised of a film of an organic compound having both a hydrophobic moiety and a hydrophilic moiety, and the grating being comprised of a film having a different refractive index from that of the optical waveguide.
Claim 2
Dependent Claim
63 words
An optical coupler which comprises an optical waveguide with a flat grating included therein, and a substrate on which the waveguide is formed, the optical waveguide being comprised of a film of an organic compound having both a hydrophobic moiety and a hydrophilic moiety, and the grating being comprised of a film having a different refractive index from that of the optical waveguide.
Claim 3
Dependent Claim
31 words
An optical coupler according to claim 1, wherein a buffer layer is provided on the optical waveguide and a reflective layer is provided on an upper surface of the buffer layer.
Claim 4
Dependent Claim
17 words
An optical coupler according to claim 2, wherein the buffer layer is made of an LB film.
Claim 5
Dependent Claim
23 words
An optical coupler according to claim 1, wherein the substrate is made of at least one of glass, ceramics, plastic, and silicon oxide.
Claim 6
Dependent Claim
16 words
An optical coupler according to claim 2, wherein the reflective layer is an Al vapor-deposited substrate.
Claim 7
Dependent Claim
26 words
An optical coupler according to claim 1, wherein the optical waveguide is made of at least one of a diacetylene derivative and a photopolymerizable olefinic compound.
Claim 8
Dependent Claim
19 words
An optical coupler according to claim 1, wherein the optical waveguide has a thickness of 0.5 to 5 μm.
Claim 9
Dependent Claim
21 words
An optical coupler according to claim 1, wherein the grating is made of an aliphatic carboxylic acid and its metal salt.
Claim 10
Dependent Claim
32 words
An optical coupler according to claim 1, further comprising two hydrophilic groups disposed so as to face each other to form a contact surface between the optical waveguide and the flat grating.
Claim 11
Dependent Claim
32 words
An optical coupler according to claim 1, further comprising two hydrophobic groups disposed so as to face each other to form a contact surface between the optical waveguide and the flat grating.
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) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |