Patent US2164194A successfully refreshed from Google Patents.
US4239369A
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Camera and reflector having offset optical and mechanical axes
Assignee: Osram Sylvania Inc
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Filing: 1978-11-20
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Granted: 1980-12-16
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Expires: 1998-11-20
Abstract
Abstract An open-ended reflector for being positioned within a camera to provide a controlled pattern of light on a rectangular subject field located at a distance, e.g., five feet, from the camera. The reflector includes three specular reflective surfaces and a fourth surface having a ribbed diffusing region thereon. These four surfaces are oriented in such a manner that the mechanical axis through the reflector's open end will be offset from the reflector's optical axis when viewed from in front of the reflector.
Inventors
- 👤 George J. English
- 👤 Robert E. Levin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:29
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/04; F21V7/09
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
142 words
A reflector for being fixedly oriented within a photographic camera to provide a controlled pattern of light from a light source located within said reflector on a planar subject field located an established distance from said camera, said reflector including an optical axis and comprising: a plurality of internal specular reflective surfaces; and at least one internal surface having a diffusing region thereon, said specular reflective surfaces and said surface having said diffusing region thereon defining an open end within said reflector such that the mechanical axis of said open end and said optical axis of said reflector pass through said open end and are oriented therein in an offset relationship, said specular surfaces and said diffusing region directly reflecting light from said light source toward said subject field such that said field receives light from both specularly and diffusely reflective surfaces.
Claim 2
Dependent Claim
142 words
A reflector for being fixedly oriented within a photographic camera to provide a controlled pattern of light from a light source located within said reflector on a planar subject field located an established distance from said camera, said reflector including an optical axis and comprising: a plurality of internal specular reflective surfaces; and at least one internal surface having a diffusing region thereon, said specular reflective surfaces and said surface having said diffusing region thereon defining an open end within said reflector such that the mechanical axis of said open end and said optical axis of said reflector pass through said open end and are oriented therein in an offset relationship, said specular surfaces and said diffusing region directly reflecting light from said light source toward said subject field such that said field receives light from both specularly and diffusely reflective surfaces.
Claim 3
Dependent Claim
31 words
The reflector according to claim 1 wherein a first of said specular reflective surfaces is substantially planar and is positioned at a predetermined angle from said optical axis of said reflector.
Claim 4
Dependent Claim
21 words
The reflector according to claim 2 wherein said predetermined angle is within the range of from about 5 to 10 degrees.
Claim 5
Dependent Claim
41 words
The reflector according to claim 2 wherein the number of said internal specular reflective surfaces is at least three, a second and a third of said surfaces located on opposing sides of said first, planar specular reflective surface and contiguous thereto.
Claim 6
Dependent Claim
31 words
The reflector according to claim 4 wherein each of said second and third specular reflective surfaces is curvilinear, said second and third surfaces diverging toward said open end of said reflector.
Claim 7
Dependent Claim
25 words
The reflector according to claim 4 wherein each of said second and third specular reflective surfaces is perpendicular to said first, planar specular reflective surfaces.
Claim 8
Dependent Claim
52 words
The reflector according to claim 4 wherein said camera includes a flash lamp assembly sequentially movable therein and having a plurality of individual flash lamps, said reflector including first and second spaced-apart, aligned slots therein for having said flash lamp assembly pass therethrough during said sequential movement of said flash lamp assembly.
Claim 9
Dependent Claim
24 words
The reflector according to claim 7 wherein said first and second slots are located within said second and third internal specular reflective surfaces, respectively.
Claim 10
Dependent Claim
21 words
The reflector according to claim 1 wherein in cross-section said surface having said diffusing region thereon is of substantially parabolic configuration.
Claim 11
Dependent Claim
51 words
The reflector according to claim 9 wherein said surface having said diffusing region thereon further includes a specular reflective region adjacent said diffusing region, said specular reflective region located nearer said optical axis of said reflector than said diffusing region and directly reflecting light over the entirety of said subject field.
Claim 12
Dependent Claim
40 words
The reflector according to claim 9 wherein said diffusing region comprises a plurality of substantially parallel grooves within said internal surface, each of said grooves substantially circular in configuration in a plane perpendicular to said optical axis of said reflector.
Claim 13
Dependent Claim
23 words
The reflector according to claim 11 wherein the number of said grooves is within the range of from about 6 to about 12.
Claim 14
Dependent Claim
34 words
The reflector according to claim 1 wherein said open end permits light emitted by said light source to be directly projected toward said subject field when said light source is located within said reflector.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |