Patent US5737113A successfully refreshed from Google Patents.
US5737113A
Expired / Lapsed
US
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Optical modulators and color image display device employing the same
Assignee: Canon Inc
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Filing: 1996-08-01
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Granted: 1998-04-07
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Expires: 2016-08-01
Abstract
Abstract An optical modulator includes a first diffraction grating for separating a light flux of a wide wavelength band into light fluxes of given wavelength bands. The optical modulator further includes an optical modulation element for modulating the separated light fluxes through corresponding picture elements, respectively, and outputting them. The optical modulator further includes a second diffraction grating for synthesizing the modulated light fluxes outputted from the optical modulation element, wherein the first diffraction grating, the optical modulation element and the second diffraction grating are integrally structured.
Inventors
- 👤 Junko Kuramochi
- 👤 Michitaka Setani
- 👤 Takehiko Nakai
- 👤 Saburo Sugawara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:23
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133621; G02B; G02B27/00; G02B27/10; G02B27/1086; G02B27/14; G02B27/144; G02B5/00; G02B5/20; G02B5/203
Claims Analysis
Total Claims: 60
Claim 1
Independent Claim
81 words
An optical modulator comprising: a first diffraction grating for separating a light flux of a wide wavelength band into light fluxes by each of given wavelength bands; an optical modulation element for modulating said separated light fluxes by each of corresponding picture elements, respectively, and outputting them; and a second diffraction grating for synthesizing said modulated light fluxes outputted from said optical modulation element, wherein said first diffraction grating, said optical modulation element and said second diffraction grating are integrally structured.
Claim 2
Dependent Claim
81 words
An optical modulator comprising: a first diffraction grating for separating a light flux of a wide wavelength band into light fluxes by each of given wavelength bands; an optical modulation element for modulating said separated light fluxes by each of corresponding picture elements, respectively, and outputting them; and a second diffraction grating for synthesizing said modulated light fluxes outputted from said optical modulation element, wherein said first diffraction grating, said optical modulation element and said second diffraction grating are integrally structured.
Claim 3
Dependent Claim
19 words
The optical modulator according to claim 1, wherein said first and second diffraction gratings comprise binary optical elements, respectively.
Claim 4
Dependent Claim
38 words
The optical modulator according to claim 1, further comprising means for causing a main beam of each of said light fluxes separated by said first diffraction grating to be incident perpendicularly upon corresponding one of said picture elements.
Claim 5
Dependent Claim
36 words
The optical modulator according to claim 1, further comprising condenser means for converging the light flux of said wide wavelength band and causing the converged light flux to be incident upon each of said picture elements.
Claim 6
Dependent Claim
36 words
The optical modulator according to claim 1, further comprising condenser means for converging the light fluxes separated by said first diffraction grating and causing the converged light fluxes to be incident upon said picture elements, respectively.
Claim 7
Dependent Claim
16 words
The optical modulator according to claim 1, wherein said optical modulation element comprises a liquid-crystal element.
Claim 8
Dependent Claim
23 words
The optical modulator according to claim 1, wherein said optical modulator is one of a transmission-type optical modulator and a reflection-type optical modulator.
Claim 9
Dependent Claim
27 words
The optical modulator according to claim 7, wherein said optical modulator is the reflection-type optical modulator, and wherein said first and second diffraction gratings are the same.
Claim 10
Dependent Claim
73 words
An optical modulator comprising: a diffraction grating for separating a light flux of a wide wavelength band into light fluxes by each of given wavelength bands; an optical modulation element for modulating said separated light fluxes through corresponding picture elements, respectively, and outputting them; and means for causing a principal beam of each of said light fluxes separated by said diffraction grating to be incident perpendicularly upon corresponding one of said picture elements.
Claim 11
Dependent Claim
73 words
An optical modulator comprising: a diffraction grating for separating a light flux of a wide wavelength band into light fluxes by each of given wavelength bands; an optical modulation element for modulating said separated light fluxes through corresponding picture elements, respectively, and outputting them; and means for causing a principal beam of each of said light fluxes separated by said diffraction grating to be incident perpendicularly upon corresponding one of said picture elements.
Claim 12
Dependent Claim
16 words
The optical modulator according to claim 9, wherein said diffraction grating comprises a binary optical element.
Claim 13
Dependent Claim
36 words
The optical modulator according to claim 9, further comprising condenser means for converging the light flux of said wide wavelength band and causing the converged light flux to be incident upon each of said picture elements.
Claim 14
Dependent Claim
35 words
The optical modulator according to claim 9, further comprising condenser means for converging the light fluxes separated by said diffraction grating and causing the converged light fluxes to be incident upon said picture elements, respectively.
Claim 15
Dependent Claim
24 words
The optical modulator according to claim 9, further comprising optical synthesizing means for synthesizing said modulated light fluxes outputted from said optical modulation element.
Claim 16
Dependent Claim
17 words
The optical modulator according to claim 13, wherein said optical synthesizing means comprises a binary optical element.
Claim 17
Dependent Claim
16 words
The optical modulator according to claim 9, wherein said optical modulation element comprises a liquid-crystal element.
Claim 18
Dependent Claim
16 words
The optical modulator according to claim 9, wherein said optical modulator includes a reflection-type optical modulator.
Claim 19
Dependent Claim
73 words
An optical modulator comprising: a binary optical element for separating a light flux of a wide wavelength band into light fluxes by each of given wavelength bands; and an optical modulation element for modulating said separated light fluxes through corresponding picture elements, respectively, and outputting them, wherein the separated light beams by each of said given wavelength bands the binary optical element are incident on different picture elements of said optical modulation element.
Claim 20
Dependent Claim
73 words
An optical modulator comprising: a binary optical element for separating a light flux of a wide wavelength band into light fluxes by each of given wavelength bands; and an optical modulation element for modulating said separated light fluxes through corresponding picture elements, respectively, and outputting them, wherein the separated light beams by each of said given wavelength bands the binary optical element are incident on different picture elements of said optical modulation element.
Claim 21
Dependent Claim
38 words
The optical modulator according to claim 17, further comprising means for causing a main beam of each of said light fluxes separated by said binary optical element to be incident perpendicularly upon corresponding one of said picture elements.
Claim 22
Dependent Claim
36 words
The optical modulator according to claim 17, further comprising condenser means for converging the light flux of said wide wavelength band and causing the converged light flux to be incident upon each of said picture elements.
Claim 23
Dependent Claim
36 words
The optical modulator according to claim 17, further comprising condenser means for converging the light fluxes separated by said binary optical element and causing the converged light fluxes to be incident upon said picture elements, respectively.
Claim 24
Dependent Claim
24 words
The optical modulator according to claim 17, further comprising optical synthesizing means for synthesizing said modulated light fluxes outputted from said optical modulation element.
Claim 25
Dependent Claim
17 words
The optical modulator according to claim 21, wherein said optical synthesizing means includes a binary optical element.
Claim 26
Dependent Claim
16 words
The optical modulator according to claim 17, wherein said optical modulation element includes a liquid-crystal element.
Claim 27
Dependent Claim
74 words
An optical modulator comprising: a binary optical element for separating a light flux of a wide wavelength band into light fluxes of given wavelength bands; an optical modulation element for modulating said separated light fluxes by each of corresponding picture elements, respectively, and outputting them; and reflection means for reflecting the light fluxes transmitted through said optical modulation element, wherein said binary optical element synthesizes the light fluxes modulated by said optical modulation element.
Claim 28
Dependent Claim
74 words
An optical modulator comprising: a binary optical element for separating a light flux of a wide wavelength band into light fluxes of given wavelength bands; an optical modulation element for modulating said separated light fluxes by each of corresponding picture elements, respectively, and outputting them; and reflection means for reflecting the light fluxes transmitted through said optical modulation element, wherein said binary optical element synthesizes the light fluxes modulated by said optical modulation element.
Claim 29
Dependent Claim
38 words
The optical modulator according to claim 24, further comprising means for causing a principal beam of each of said light fluxes separated by said binary optical element to be incident perpendicularly upon corresponding one of said picture elements.
Claim 30
Dependent Claim
35 words
The optical modulator according to claim further comprising condenser means for converging the light flux of said wide wavelength band and causing the converged light flux to be incident upon each of said picture elements.
Claim 31
Dependent Claim
36 words
The optical modulator according to claim 24, further comprising condenser means for converging the light fluxes separated by said binary optical element and causing the converged light fluxes to be incident upon said picture elements, respectively.
Claim 32
Dependent Claim
16 words
The optical modulator according to claim 24, wherein said optical modulation element comprises a liquid-crystal element.
Claim 33
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 1.
Claim 34
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 2.
Claim 35
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 3.
Claim 36
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 4.
Claim 37
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 5.
Claim 38
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 6.
Claim 39
Dependent Claim
13 words
A Color image display device comprising: said optical modulator according to claim 7.
Claim 40
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 8.
Claim 41
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 9.
Claim 42
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 10.
Claim 43
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 11.
Claim 44
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 12.
Claim 45
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 13.
Claim 46
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 14.
Claim 47
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 15.
Claim 48
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 16.
Claim 49
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 17.
Claim 50
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 18.
Claim 51
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 19.
Claim 52
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 20.
Claim 53
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 21.
Claim 54
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 22.
Claim 55
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 23.
Claim 56
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 24.
Claim 57
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 25.
Claim 58
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 26.
Claim 59
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 27.
Claim 60
Dependent Claim
13 words
A color image display device comprising: said optical modulator according to claim 28.
References Cited (Backward Citations)
US3947189A
Cited
US4900135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-06 | 2001-10-06 | 2002-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-06 | 2005-10-06 | 2006-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-06 | 2009-10-06 | 2010-04-07 | $7700.00 | Window Closed / Lapsed |