# US 4,399,471 A · Apparatus for recording image information and sound recordings, presented as electrical input signals, on an image record plate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,399,471 A - Document ID: US4399471A - Status: Granted - Kind: A - Application number: 06/211,898 - Filed: 1980-12-01 - Granted: 1983-08-16 - Earliest claimed: 1979-12-11 - Assignees: BTS Systementwicklungs GmbH - Inventors: Heinz Preuss - Web page: https://patentgrep.com/patent/US4399471A ## CPC - G11B 23/0057: {Intermediate mediums, i.e. mediums provided with an information structure not specific to the method of reproducing or duplication such as matrixes for mechanical pressing of an information structure (for record carriers with directly readable mechanical information G11B3/685); record carriers having a relief information structure provided with or included in layers not specific for a single reproducing method; apparatus or processes specially adapted for their manufacture} - G11B 7/0037: with discs - G11B 7/26: Apparatus or processes specially adapted for the manufacture of record carriers - H04N 5/7605: {on discs or drums (H04N5/781, H04N5/805, H04N5/83, H04N5/85 take precedence)} - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract Apparatus to record image information, presented in the form of electrical input signals, as complete half-tone images in a spiral centered about the center of a plate-shaped image record and to make sound recordings, from electrical input signals, presented as an optical sound track aligned with and adjacent to the line of half-tone complete images, and to record optical control tracks for controlling playback of the record adjacent to and aligned with the spiral of the half-tone complete images. The apparatus includes digital to analogue convertors; a Read Only Memory; an image sound line Random Access Memory, wherein, in a desired order and line-by-line, electrical input impulses, representing image and sound information, after undergoing analog to digital conversion, are recorded together with ROM information to form the control tracks; a laser producing an output light beam; a modulator modulating the light beam with information coming, after digital to analog conversion, from the image sound line Random Access Memory; a sweep deflecting unit, whereby the modulated laser beam, on being deflected thereby is swept along a line on a light-sensitive layer at the time of recording; an objective focussing the laser beam; a record turntable; and a carriage rotatably supporting the record turntable that supports an image record having a light-sensitive layer, whereon the light beam, after being focussed in the objective, is pointed for the line-by-line recording of the information taken from the image sound line Random Access Memory. ## Claims ### Claim 1 In an apparatus to record image information, presented as electrical input signals, as complete half-tone images in a spiral centered on a plate-shaped image record and to make sound redordings, from electrical input signals, presented as an optical sound track aligned with and adjoining the line of half-tone complete images, and furthermore to record optical control tracks for controlling playback of the record, such control tracks being adjacent to and aligned with the spiral of the half tone complete images, said apparatus comprising in combination: (1) a read only memory, an image sound line random access memory operatively associated therewith, in which, in a desired order and line-by-line, electrical input impulses, representative of the image and sound information, after undergoing analog to digital conversion, are recorded together with information, present in said read only memory, to form the said control tracks, (2) a digital to analog converter, and operative associated therewith further including a laser for producing an output light beam, a modulator for modulating said light beam with information coming, after digital to analog conversion in said converter, from the image sound line random access memory, a sweep deflecting unit operatively associated with said laser and with which the modulated laser beam, on being deflected by said sweep deflecting unit is swept along a line on a light-sensitive layer at the time of recording, and an objective for focussing the said laser beam, and a record turntable, a carriage turningly supporting said record turntable, said turntable being arranged for supporting an image record having a light-sensitive layer, onto which the light beam, after being focussed in the objective, is pointed for the line-by-line recording of the information taken from the image sound line random access memory. ### Claim 2 (depends on 1) The apparatus in combination according to claim 1, wherein said modulator is an electro-optic modulator. ### Claim 3 (depends on 1) The apparatus in combination according to claim 1, wherein said modulator is an electro-acoustic modulator. ### Claim 4 (depends on 1) The apparatus in combination according to claim 1, wherein said sweep deflecting unit is a vibratory mirror. ### Claim 5 (depends on 1) The apparatus in combination according to claim 1, wherein said sweep deflecting unit is a turntable mirror wheel, having an outer edge made up of mirror flats. ### Claim 6 (depends on 1) The apparatus in combination according to claim 1, wherein said sweep deflecting unit is a turnable prism. ### Claim 7 (depends on 5) The apparatus in combination according to claim 5, having, in part of the path of the light from the modulator to the mirror wheel, a polarization switch, a double-refracting crystal placed after said switch in the direction of the light, and after said crystal in the direction of the light including a ray splitter, making an angle of 45.degree. to the light path, and arranged for deflecting the light beam at a right angle to the mirror flats of said mirror wheel, and a system for switching over said polarization switch when a corner, formed between two mirror flats of the mirror wheel, gets to the beam reflected in said double-refracting crystal, and when th beam, not deflected in said crystal, is directed normally to one mirror flat of said mirror wheel. ### Claim 8 (depends on 7) The apparatus in combination according to claim 7, further having a first objective, a second objective on the light output side of said first objective, a second double-refracting crystal on the light output side of said second objective, said first and second objectives and said second double-refracting crystal being placed in the path of said light after being reflected by said mirror wheel, and a microscope objective in the light path between the second double-refracting crystal and the light-sensitive layer. ### Claim 9 (depends on 8) The apparatus in combination according to claim 8, further having a linear motor for moving said carriage, a further linear motor for turning the turntable and a control system for controlling such motion of the carriage and turning of the turntable. ### Claim 10 (depends on 9) The apparatus in combination according to claim 9, having a condenser, and a cylindrical lens on the light output side of said condenser, said cylindrical lens having a cylinder axis normal to the line direction. ### Claim 11 (depends on 10) The apparatus in combination according to claim 10, wherein said light-sensitive layer is made up of a material that evaporates under the effect of said light beam.