US3592529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lenticular lens array for optical projection system
Assignee: General Electric Co
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Filing: 1970-03-04
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Granted: 1971-07-13
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Expires: 1990-03-04
Abstract
Abstract In light valve projection apparatus employing a light-modulating medium and a Schlieren optics input mask having two sets of slots, each set oriented in a different direction and illuminated by light of a different color emanating from a common source so as to produce light of both colors on the medium, center-tocenter spacing of the slots in one set is made independent of center-to-center spacing of the slots in the other set. Lenticular lens of two different aspect ratios image the source in either color, respectively, onto the slots of either set, respectively, through an additional mask.
Inventors
- 👤 Lawrence A Juhlin Jr
- 👤 Michael Graser Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:31
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
209 words
In optical projection apparatus employing a light-modulating medium containing an image in the form of a plurality of diffraction gratings, a sourcE of bichromatic light, and a Schlieren input mask having slots in one region extending along one direction and in a second region extending along a different direction, said bichromatic light being directed onto said Schlieren input mask and illuminating said one region with light of one color and said second region with light of a second color so as to produce light of both said colors on said medium, and a remote display surface on which light emergent from said medium through an output mask impinges to form a visible image, the improvement comprising a single first array of lenses situated between said source of bichromatic light and said Schlieren input mask, said single first array being illuminated by light of said one color in a first zone and by light of said second color in a second zone, said lenses within said first zone having a different aspect ratio than said lenses within said second zone so as to permit optimum spacing of the Schlieren input mask slots in each of said first and second regions thereof for each of said first and second colors, respectively.
Claim 2
Dependent Claim
209 words
In optical projection apparatus employing a light-modulating medium containing an image in the form of a plurality of diffraction gratings, a sourcE of bichromatic light, and a Schlieren input mask having slots in one region extending along one direction and in a second region extending along a different direction, said bichromatic light being directed onto said Schlieren input mask and illuminating said one region with light of one color and said second region with light of a second color so as to produce light of both said colors on said medium, and a remote display surface on which light emergent from said medium through an output mask impinges to form a visible image, the improvement comprising a single first array of lenses situated between said source of bichromatic light and said Schlieren input mask, said single first array being illuminated by light of said one color in a first zone and by light of said second color in a second zone, said lenses within said first zone having a different aspect ratio than said lenses within said second zone so as to permit optimum spacing of the Schlieren input mask slots in each of said first and second regions thereof for each of said first and second colors, respectively.
Claim 3
Dependent Claim
34 words
The apparatus of claim 1 wherein said one color comprises magenta, said second color comprises green, and said lenses within said first zone are of smaller size than said lenses within said second zone.
Claim 4
Dependent Claim
124 words
The apparatus of claim 1 including a second array of lenses situated between said light-modulating medium and said single first array, said second array being illuminated by light of said one color in a first area and by light of said second color in a second area, said lenses within said first area of said second array having the same aspect ratio as the lenses within the first zone of said single first array and said lenses within said second area of said second array having the same aspect ratio as the lenses within the second zone of said single first array, said lenses of said second array being arranged in a pattern homothetic to the pattern of lenses of said single first array.
Claim 5
Dependent Claim
69 words
The apparatus of claim 3 wherein said one color comprises magenta, said second color comprises green, said lenses within said first zone of said single first array are of smaller size than said lenses within said second zone of said single first array, and said lenses of said second array within said first area are of smaller size than said lenses of said second array within said second area.
Claim 6
Dependent Claim
90 words
The apparatus of claim 3 including an image area defining mask situated in contact with said single first array of lenses, said image area defining mask comprising a plurality of apertures of identical aspect ratio arranged in one regular order in a location illuminated by light of said one color emanating from said single first array of lenses within said first zone and arranged in another regular order in a location illuminated by light of said second color emanating from said single first array of lenses within said second zone.
Claim 7
Dependent Claim
69 words
The apparatus of claim 5 wherein said one color comprises magenta, said second color comprises green, said lenses within said first zone of said single first array are of smaller size than said lenses within said second zone of said single first array, and said lenses of said second array within said first area are of smaller size than said lenses of said second array within said second area.
Claim 8
Dependent Claim
29 words
The apparatus of claim 3 wherein said second array of lenses is situated adjacent said Schlieren input mask between said Schlieren input mask and said first array of lenses.
Claim 9
Dependent Claim
90 words
The apparatus of claim 7 including an image area defining mask situated in contact with said single first array of lenses, said image area defining mask comprising a plurality of apertures of identical aspect ratio arranged in one regular order in a location illuminated by light of said one color emanating from said single first array of lenses within said first zone and arranged in another regular order in a location illuminated by light of said second color emanating from said single first array of lenses within said second zone.
References Cited (Backward Citations)
US3330908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |