US3784277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrected optical system for shallow camera or the like, components thereof
Assignee: Polaroid Corp
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Filing: 1969-12-15
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Granted: 1974-01-08
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Expires: 1989-12-15
Abstract
Abstract A corrected optical system is provided for a shallow camera that is characterized by an extremely short dimension between the forward position of the first refracting surface and the rearward position of the final image surface. In the compact hand-held camera illustrated herein as an example, the optical system is panoramic in operation, comprising (at one end of the camera) a pivotal scanning mirror and (at the other end of the camera) a slit, past which the photosensitive film is moved at a linear rate, with which the scanning mirror rate is synchronized in order to synthesize a complete image from a continuous sequence of increments.
Inventors
- 👤 J Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:23
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/0025; G02B27/0031; G02B13/00; G02B13/06; G03; G03B; G03B17/00; G03B17/02; G03B17/04; G03B37/00; G03B37/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
137 words
A panoramic optical system, comprising: image-forming means for forming a real image of a subject at a focal plane having a meridional direction; scanning means, preceding said image-forming means, for causing said real image to move across said focal plane in said meridional direction, said scanning means including a mirror pivoted to rotate about an axis normal to both the optic axis of said image-forming means and said meridional direction; and a pair of prisms, operatively associated with said image-forming means and synchronized with said scanning means, for compensating meridional variations in the magnification of said real image due to the operation of said scanning mirror, said prisms being arranged with respect to each other to produce equal but opposite refractions of the light flux through them to avoid causing lateral color dispersion of said light flux.
Claim 2
Dependent Claim
137 words
A panoramic optical system, comprising: image-forming means for forming a real image of a subject at a focal plane having a meridional direction; scanning means, preceding said image-forming means, for causing said real image to move across said focal plane in said meridional direction, said scanning means including a mirror pivoted to rotate about an axis normal to both the optic axis of said image-forming means and said meridional direction; and a pair of prisms, operatively associated with said image-forming means and synchronized with said scanning means, for compensating meridional variations in the magnification of said real image due to the operation of said scanning mirror, said prisms being arranged with respect to each other to produce equal but opposite refractions of the light flux through them to avoid causing lateral color dispersion of said light flux.
Claim 3
Dependent Claim
33 words
The panoramic optical system described in claim 1, wherein said image-forming means also collimates the light flux incident on said pair of prisms and said prisms are adapted to rotate in opposite directions.
Claim 4
Dependent Claim
26 words
The panoramic optical system described in claim 2, wherein said image-forming means includes a pair of air-spaced doublets and said prisms are positioned between said doublets.
Claim 5
Dependent Claim
140 words
In a system for forming a real image of a subject, the improvement comprising: lens means for forming a real image of said subject at a focal plane; scanning means for causing light rays coming from said subject to scan across at least a portion of said lens means, thereby causing meridional variations in the magnification of different portions of said real image at said focal plane; and compensating means for compensating at least part of said meridional variations in said magnification of said real image, said compensating means comprising at least one displaceably mounted prism operably associated with said lens means and means for effecting the displacement of said prism in a manner synchronized with the operation of said scanning means so as to correct said meridional variations in said magnification due to the operation of said scanning means.
Claim 6
Dependent Claim
140 words
In a system for forming a real image of a subject, the improvement comprising: lens means for forming a real image of said subject at a focal plane; scanning means for causing light rays coming from said subject to scan across at least a portion of said lens means, thereby causing meridional variations in the magnification of different portions of said real image at said focal plane; and compensating means for compensating at least part of said meridional variations in said magnification of said real image, said compensating means comprising at least one displaceably mounted prism operably associated with said lens means and means for effecting the displacement of said prism in a manner synchronized with the operation of said scanning means so as to correct said meridional variations in said magnification due to the operation of said scanning means.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |