US3756719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High efficiency integrator box
Assignee: Eastman Kodak Co
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Filing: 1972-04-17
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Granted: 1973-09-04
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Expires: 1992-04-17
Abstract
Abstract An improved integrator box for use in a high intensity lamphouse to produce reflection images of the lamphouse aperture to increase the illumination uniformity. A plurality of triangular shaped reflectors are placed within the integrator box of the lamphouse. By proper location and sizing of the reflectors supplementary first reflection images of the light source can be directed into the quandrant centers of the printing plane.
Inventors
- 👤 J Harter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:49
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/54; G03B27/545
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
167 words
In photographic printing apparatus having a high intensity lamp, a transparency focal plane, a printing lens and projection area for receiving radiation images from said lamp through said transparency focal plane, a means for providing improved uniformity of the illumination level at the projection area, said means comprising: an integrator box located between said lamp and said transparency focal plane, said integrator box having a series of highly reflective walls interconnected so as to give said box a substantially square cross-section with a first open end adjacent said lamp and a second open end adjacent said transparency focal plane; and a series of triangularly shaped reflective surfaces each having a base intersecting said first open end at adjacent walls of said integrator box and extending within said integrator box, the apex of each of said triangular surfaces extending to the intersection of said adjacent walls wherein said surfaces are oriented such that first reflection images therefrom will be directed into the quadrant centers of the projection area.
Claim 2
Dependent Claim
167 words
In photographic printing apparatus having a high intensity lamp, a transparency focal plane, a printing lens and projection area for receiving radiation images from said lamp through said transparency focal plane, a means for providing improved uniformity of the illumination level at the projection area, said means comprising: an integrator box located between said lamp and said transparency focal plane, said integrator box having a series of highly reflective walls interconnected so as to give said box a substantially square cross-section with a first open end adjacent said lamp and a second open end adjacent said transparency focal plane; and a series of triangularly shaped reflective surfaces each having a base intersecting said first open end at adjacent walls of said integrator box and extending within said integrator box, the apex of each of said triangular surfaces extending to the intersection of said adjacent walls wherein said surfaces are oriented such that first reflection images therefrom will be directed into the quadrant centers of the projection area.
Claim 3
Dependent Claim
84 words
An improved integrator box for providing uniform illumination between a high intensity lamphouse and a projection plane, said integrator box including a first series of highly reflective interior surfaces interconnected to form a unit having a regular polygonal cross-section, and a second series of highly reflective interior surfaces, each of said second series of surfaces intersecting adjacent inTerior surfaces of said first series and being oriented so as to diverge from the projection path of said lamphouse as it progresses through said integrator box.
Claim 4
Dependent Claim
84 words
An improved integrator box for providing uniform illumination between a high intensity lamphouse and a projection plane, said integrator box including a first series of highly reflective interior surfaces interconnected to form a unit having a regular polygonal cross-section, and a second series of highly reflective interior surfaces, each of said second series of surfaces intersecting adjacent inTerior surfaces of said first series and being oriented so as to diverge from the projection path of said lamphouse as it progresses through said integrator box.
Claim 5
Dependent Claim
71 words
The apparatus of claim 2 wherein said first series of highly reflective interior surfaces include four plates interconnected to form a unit having a substantially square cross-section, and wherein said second series of highly reflective interior surfaces include four triangular plates oriented to have the base of each of said plates intersecting adjacent plates of said first series and have the apexes thereof extending to the intersection of said adjacent plates.
Claim 6
Dependent Claim
28 words
The apparatus of claim 3 wherein said base of each of said triangular plates is positioned at the end of said first series of plates adjacent said lamphouse.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |