Patent EP0023833A1 successfully refreshed from Google Patents.
EP0023833A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A method of making a photographic exposure from a television picture
Assignee: Medicor Muvek
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Filing: 1980-08-04
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Granted: —
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Expires: 2000-08-04
Abstract
Abstract A between-lens shutter assembly (14) for photographing devices, comprising at least two, preferably three rotary plates (15, 16, 17) with axes parallel to the axis of the lenses. Each plate (15,16,17) comprises an opening (28, 29, 30). When the plates (15, 16, 17) are rotated at a common speed, the open- In a method using the shutter assembly (14) exposures are taken from television pictures, in which the length of the exposure period is adjusted to be equal to the period of a television picture (T) and the duration of either an opening or closing section (A or B), whereby uniform illumination is ensured for the exposure. The invention is particularly suitable for the precise photography of X-ray pictures displayed on the screen of a television monitor.
Inventors
- 👤 Karoly Szasz
- 👤 Sandor Meszaros
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 16:32
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/10; A; A61; A61B; A61B6/00; G03B42/00; G03B42/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
A shutter assembly (14) for a photographing device with precision timing facility, in which said photographic device comprises an optics (8) defining an inside opening (24), the optics comprising a set of lenses at its object side and a further set of lenses at its image side, said shutter assembly (14) being arranged between said sets of lenses and surrounding said inside opening (24), characterized in that said shutter assembly (14) comprises at least two rotary plates (15, 16, 17) adapted for rotary movements with identical speed around respective axes extending parallel to the optical axis (1) of said optics (8) and radially offset therefrom by a distance at least equal to the radius of said inside opening (24), said rotary plates (15, 16, 17) being arranged to completely cover said inside opening (24) and define respective openings (28, 29, 30) having a radial width at least equal to the size of said inside opening (24), said openings (28, 29, 30) being moved by rotational movement of said rotary plates through positions in which said inside opening (24) is completely uncovered by said rotary plates.
Claim 2
Dependent Claim
185 words
A shutter assembly (14) for a photographing device with precision timing facility, in which said photographic device comprises an optics (8) defining an inside opening (24), the optics comprising a set of lenses at its object side and a further set of lenses at its image side, said shutter assembly (14) being arranged between said sets of lenses and surrounding said inside opening (24), characterized in that said shutter assembly (14) comprises at least two rotary plates (15, 16, 17) adapted for rotary movements with identical speed around respective axes extending parallel to the optical axis (1) of said optics (8) and radially offset therefrom by a distance at least equal to the radius of said inside opening (24), said rotary plates (15, 16, 17) being arranged to completely cover said inside opening (24) and define respective openings (28, 29, 30) having a radial width at least equal to the size of said inside opening (24), said openings (28, 29, 30) being moved by rotational movement of said rotary plates through positions in which said inside opening (24) is completely uncovered by said rotary plates.
Claim 3
Dependent Claim
68 words
A shutter assembly as claimed in claim 1, characterized in that the axes of said rotary plates (15, 16, 17) are arranged at identical radial distances from said optical axis (1), and said axes are located, as viewed in a plane normal to said optical axis (1), at the apex points of an imaginary regular polygon having as many apices as there are rotary plates (15, 16, 17).
Claim 4
Dependent Claim
58 words
A shutter assembly as claimed in claim 2, characterized in that said rotary plates (15, 16,17) define said openings (28, 29, 30) with identical shapes, and corresponding points of said openings (28, 29, 30) fall in said normal plane at the apex points of a regular polygon with the same number of apices as the first mentioned polygon.
Claim 5
Dependent Claim
46 words
A shutter assembly as claimed in claim 2, comprising respective cog-wheels (18, 19, 20) coupled to said rotary plates (15, 16, 17) at the axes thereof and having identical numbers of teeth, and an annular gear (21) coupled to all of said cog-wheels (18, 19, 20).
Claim 6
Dependent Claim
32 words
A shutter assembly as claimed in claim 4, comprising an intermediate gear (22) coupled to said annular gear (21) and a step motor (23) coupled to and driving said intermediate gear (22).
Claim 7
Independent Claim
130 words
A method of making a photographic exposure from a television picture using a shutter assembly as claimed in any preceding claim, characterized by the steps of rotating said rotary plates (15, 16, 17) with uniform angular speed and uncovering said inside opening (24) of said optics (8) for a period defined between a starting moment (t ) and a finishing moment (t 3 ), said uncovering period comprises an opening section (A) with partly open inside opening, an open period with completely upen inside opening and a closing section (B) with partly open inside opening, and adjusting the duration of said uncovering period to be the combined length of a full picture duration (T) of the television picture and either of the duration of said opening and closing sections (A,B).
References Cited (Backward Citations)
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