US3814853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-field mixer for television transmissions
Assignee: Societe dOptique Precision Electronique et Mecanique SOPELEM SA
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Filing: 1972-11-14
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Granted: 1974-06-04
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Expires: 1992-11-14
Abstract
Abstract A variable feed mixer which includes two semi-reflective blocks for location in front of a television camera lens focussed for infinity and defining three injection apertures for receiving images from three sources, a variable focal length lens of the zoom type generally comprising a primary lens associated with the varying element, the primary lens having been removed being positioned in front of one of the injection apertures.
Inventors
- 👤 J Lardeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:34
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/08; G03B15/12; G03B31/00; G03B31/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
108 words
A mixer for television transmissions, for transmitting selectively simultaneously and separately, a cinematographic image, a photographic image and an image of an actual object under variable magnification comprising an optical mixer assembly producing a mixed image, two cemented semireflective blocks for said assembly, a television camera lens focussed for infinity receiving the mixed image from said mixer, three orifices for said blocks for injection of images receiving the image from a cine and from a slide projector lenses focussed for infinity and, in front of one of said image injection orifices in said mixer assembly blocks, an afocal variable magnification element receiving the image of said actual object.
Claim 2
Dependent Claim
108 words
A mixer for television transmissions, for transmitting selectively simultaneously and separately, a cinematographic image, a photographic image and an image of an actual object under variable magnification comprising an optical mixer assembly producing a mixed image, two cemented semireflective blocks for said assembly, a television camera lens focussed for infinity receiving the mixed image from said mixer, three orifices for said blocks for injection of images receiving the image from a cine and from a slide projector lenses focussed for infinity and, in front of one of said image injection orifices in said mixer assembly blocks, an afocal variable magnification element receiving the image of said actual object.
Claim 3
Dependent Claim
74 words
A mixer as claimed in claim 1, including an optical system reflecting the object plane of said varying element onto the plane of a document-supporting panel, means for lighting said document-supporting panel, a monitoring receiver connected to said television camera for monitoring the images picked up by said television camera, and a console connected to and operating said projectors, their lighting and the lighting for said document-supporting panel within reach of a single operator.
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |