US3843835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system for taking videothelephone pictures and the like
Assignee: Italtel SpA
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Filing: 1973-01-12
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Granted: 1974-10-22
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Expires: 1993-01-12
Abstract
Abstract A television camera, to be used as part of a videotelephone transmitter, includes a stationary objective and a carriage movable in front of that objective transversely to its axis, the carriage supporting a miter prism and a plurality of supplementary lenses alternately alignable with the objective. A supporting surface for documents to be transmitted lies parallel to and spaced from the objective axis so as to confront the base of the miter prism when the latter is in its operative position, the objective then focusing light rays from that surface by way of the prism upon the photocathode of an image tube. In other carriage positions the supplemental lenses extend the front-focal length of the objective in order to enable the taking of pictures of persons and other objects at different distances in front of the camera.
Inventors
- 👤 V Mosca
- 👤 C Solarino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:11
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/14; H04N7/141; H04N7/142
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
181 words
In a television camera, in combination: an image tube for converting optical images into electromagnetic signals; a fixed objective optically aligned with said tube; movable mounting means in front of said objective; a miter prism on said mounting means having a base, a rear face proximal to said objective and perpendicular to the axis thereof, and a pair of symmetrically inclined side faces meeting at a ridge, the latter diverging forwardly from said rear face and sloping toward said base; document-holding means forming a supporting surface parallel to and spaced from the axis of said objective, said base confronting said supporting surface and being parallel thereto in one operating position of said mounting means in which said ridge is intersected by an extension of said axis whereby pictorial matter on said supporting surface is projected in laterally nonreversed form upon a receiving surface of said image tube; and supplemental lens means on said mounting means alignable with said objective in at least one other operating position thereof for the focusing of light rays from more remote objects upon said receiving surface.
Claim 2
Dependent Claim
181 words
In a television camera, in combination: an image tube for converting optical images into electromagnetic signals; a fixed objective optically aligned with said tube; movable mounting means in front of said objective; a miter prism on said mounting means having a base, a rear face proximal to said objective and perpendicular to the axis thereof, and a pair of symmetrically inclined side faces meeting at a ridge, the latter diverging forwardly from said rear face and sloping toward said base; document-holding means forming a supporting surface parallel to and spaced from the axis of said objective, said base confronting said supporting surface and being parallel thereto in one operating position of said mounting means in which said ridge is intersected by an extension of said axis whereby pictorial matter on said supporting surface is projected in laterally nonreversed form upon a receiving surface of said image tube; and supplemental lens means on said mounting means alignable with said objective in at least one other operating position thereof for the focusing of light rays from more remote objects upon said receiving surface.
Claim 3
Dependent Claim
24 words
The combination defined in claim 1 wherein said supplemental lens means includes a first lens for closeups and a second lens for long-range shots.
Claim 4
Dependent Claim
33 words
The combination defined in claim 1, further comprising illuminating means for said supporting surface and switch means closable by said mounting means in said one operating position thereof to actuate said illuminating means.
Claim 5
Dependent Claim
21 words
The combination in claim 1 wherein said mounting means comprises a carriage slidably guided for displacement parallel to said supporting surface.
Claim 6
Dependent Claim
18 words
The combination defined in claim 4 wherein said carriage is provided with handle means facilitating manual displacement thereof.
Claim 7
Dependent Claim
24 words
The combination iN claim 1, further comprising diaphragm means in said objective and stationary photoelectric control means for said diaphragm means adjacent said objective.
Claim 8
Dependent Claim
24 words
The combination defined in claim 1 wherein said side faces are mutually perpendicular and said ridge includes with said base an angle of 45*.
Claim 9
Dependent Claim
17 words
The combination defined in claim 1 wherein said supporting surface is horizontal and disposed beneath said objective.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |