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Details
Inventors: Owen, David P.;
Assignee: Quantel Limited (Newbury, GB2)
Primary Examiner: Chin; Tommy P.
Assistant Examiner: Nguyen; Huy
Attorney, Agent or Firm: Cooper & Dunham

An image recording apparatus comprises a store for storing data representing an image, a cathode ray tube for displaying the image represented by the data in raster scan order and a camera for directing the displayed image onto film. A movable mask is positioned in front of the screen of the cathode ray tube. The mask defines an aperture which is moved over the screen of the tube as the image is displayed thereon so as to prevent unwanted light caused by the displaying of the image from being directed onto the film.

DETAILED DESCRIPTION I claim: 1.
An image recording apparatus comprising: a raster scan display screen for displaying an image defined by electronic data, the display screen being arranged to display the image over a period of time by the scanning of a point of light over the display screen; a focusing means for focusing the image displayed on the display screen onto a photographic film; a masking means placed over the display screen, the masking means comprising a moving plate having an aperture; and a positioning means for positioning the aperture over the point of light during said scanning to allow said point of light to pass through the aperture and to prevent unwanted light caused by the displaying of the image on the display screen from being focused onto said film, wherein the display screen comprises a multiplicity of scan lines over which the point of light is scanned and the aperture comprises an elongate slot disposed substantially parallel to said scan lines having a length at least equal to that of a scan line and a width which limits the light transmitted therethrough mainly to the scan line being traversed by the light.
2.
An apparatus as claimed in claim 1, wherein the focusing means further comprises filtering means to enable different color separations to be focused individually onto said film.
3.
An apparatus as claimed in claim 1, further comprising a framestore having a multiplicity of storage locations for storing said electronic data.
4.
An apparatus as claimed in claim 3, wherein the positioning means comprises an address scanner for generating horizontal and vertical scanning signals for controlling the scanning of the point of light over the display screen and for generating corresponding address signals for addressing storage locations in said framestore.
5.
An apparatus as claimed in claim 4, wherein the positioning means further comprises: a servo motor coupled to the masking means for moving the same over the display screen; and controlling means connected to the servo motor and to the address scanner and responsive to said address signals for synchronizing the location of the masking means with the scanning of the point of light over the display screen


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