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US4927230A
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US
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Optical switch array provided with a mask having openings of a predetermined pattern and shutters corresponding to the pattern
Assignee: Canon Inc
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Filing: 1988-08-11
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Granted: 1990-05-22
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Expires: 2008-08-11
Abstract
Abstract An optical switch array includes N (N being 2 or greater integer) light-emitting elements arranged in a predetermined direction and each emitting a light independently modulated in accordance with an input signal, a mask having N×M (M being 2 or greater integer) segments arranged in the form of a matrix in the predetermined direction and a direction perpendicular thereto, some of the segments transmitting therethrough or reflecting the lights emitted from the light-emitting elements, the mask having repetitively formed thereon a predetermined light transmitting or reflecting pattern including two or more of the segments as a unit, M light-receiving elements arranged in a direction perpendicular to the predetermined direction, receiving the lights transmitted through or reflected by the mask and independently outputting signals, and shutters disposed in the optical path from the light-emitting elements to the light-receiving elements and arbitrarily openable-closable at each segment unit constituting the pattern of the mask.
Inventors
- 👤 Jun Tokumitsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:02
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/526; H04Q3/528; G; G02; G02B; G02B6/00; G02B6/04; G02B6/24; G02B6/42; G02B6/43
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
169 words
An optical switch array comprising: N light-emitting means arranged in a predetermined direction and each emitting a light independently modulated in accordance with an input signal, wherein N is an integer greater than 1; masking means having N×M segments arranged in the form of a matrix in said predetermined direction and in a direction perpendicular thereto, some of said segments performing one of transmitting the lights emitted from said light-emitting means therethrough and reflecting the lights emitted from said light-emitting means, said masking means having repetitively formed thereon a predetermined pattern comprising at least two of said segments as a unit, wherein M is an integer greater than 1; M light-receiving means arranged in a direction perpendicular to said predetermined direction, for receiving the lights transmitted through or reflected by said masking means and independently outputting signals; and shutter means comprising shutters disposed in the optical path from said light-emitting means to said light-receiving means and arbitrarily openable-closable at each segment unit constituting the pattern of said masking means.
Claim 2
Dependent Claim
169 words
An optical switch array comprising: N light-emitting means arranged in a predetermined direction and each emitting a light independently modulated in accordance with an input signal, wherein N is an integer greater than 1; masking means having N×M segments arranged in the form of a matrix in said predetermined direction and in a direction perpendicular thereto, some of said segments performing one of transmitting the lights emitted from said light-emitting means therethrough and reflecting the lights emitted from said light-emitting means, said masking means having repetitively formed thereon a predetermined pattern comprising at least two of said segments as a unit, wherein M is an integer greater than 1; M light-receiving means arranged in a direction perpendicular to said predetermined direction, for receiving the lights transmitted through or reflected by said masking means and independently outputting signals; and shutter means comprising shutters disposed in the optical path from said light-emitting means to said light-receiving means and arbitrarily openable-closable at each segment unit constituting the pattern of said masking means.
Claim 3
Dependent Claim
25 words
An optical switch array according to claim 1, further comprising first optical means for directing the lights from said light-emitting means to said masking means.
Claim 4
Dependent Claim
61 words
An optical switch array according to claim 2, wherein said first optical means comprises a first anamorphic optical system provided so as to keep said light-emitting means and said masking means in a conjugate relation in said predetermined direction and so that in a direction perpendicular to said predetermined direction, said light-emitting means are disposed at the forward focus position thereof.
Claim 5
Dependent Claim
22 words
An optical switch array according to claim 3, wherein said first anamorphic optical system comprises a spherical lens and a cylindrical lens.
Claim 6
Dependent Claim
47 words
An optical switch array according to claim 2, wherein said first optical means is a first fiber bundle comprising a plurality of optical fibers each having one end thereof opposed to said light-emitting means and the other end opposed to the individual segments of said masking means.
Claim 7
Dependent Claim
25 words
An optical switch array according to claim 1, further comprising second optical means for directing the lights from said masking means to said light-receiving means.
Claim 8
Dependent Claim
61 words
An optical switch array according to claim 6, wherein said second optical means comprises a second anamorphic optical system provided so as to keep said light-receiving means and said masking means in a conjugate relation is a direction perpendicular to said predetermined direction and so that in said predetermined direction, said light-receiving means are disposed at the rearward focus position thereof.
Claim 9
Dependent Claim
22 words
An optical switch array according to claim 7, wherein said second anamorphic optical system comprises a spherical lens and a cylindrical lens.
Claim 10
Dependent Claim
47 words
An optical switch array according to claim 6, wherein said second optical means is a second fiber bundle comprising a plurality of optical fibers each having one end thereof opposed to said light-receiving means and the other end opposed to the individual segments of said masking means.
Claim 11
Dependent Claim
38 words
An optical switch array according to claim 1, wherein said light-emitting means have a length equal to that of said masking means in a direction perpendicular to said predetermined direction, and are constructed integrally with said masking means.
Claim 12
Dependent Claim
34 words
An optical switch array according to claim 1, wherein said light-receiving means have a length equal to that of said masking means in said predetermined direction, and are constructed integrally with said masking means.
Claim 13
Dependent Claim
26 words
An optical switch array according to claim 1, wherein said shutter means has shutters of a predetermined pattern shape and serves also as said masking means.
Claim 14
Dependent Claim
24 words
An optical switch array according to claim 1, wherein said light-emitting means comprise light sources emitting lights in response to an input electrical signal.
Claim 15
Dependent Claim
25 words
An optical switch array according to claim 1, wherein said light-receiving means comprise photodetectors for converting the received lights into electrical signals and outputting them.
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) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |