EP0106607A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of and apparatus for producing holograms
Assignee: Opsec Security Group Ltd
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Filing: 1983-09-30
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Granted: —
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Expires: 2003-09-30
Abstract
Abstract A method of and apparatus for producing holographs in which a pulsed laser is used emitting a pulse duration of between 8 and 350 nanoseconds and intermittently or continuously moving a film of laser light sensitive material passed an aperture through which the laser light passes so that a subject which may be an object or preferably a subject hologram located adjacent the aperture may produce holograms on successive portions of the film.
Inventors
- 👤 James Alexander Shearer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 02:43
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/04; G03H1/20; G03H1/202; G03H1/0402; G03H2001/0413; G03H2001/0415; G03H2001/0417; G03H2001/0436; G03H2210/00; G03H2210/30; G03H2222/00; G03H2222/33; G03H2227/00; G03H2227/04; G03H2260/00; G03H2260/16; G03H2270/00; G03H2270/20; G03H2270/23
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
47 words
A method of producing holographs of a subject on laser light sensitive film which includes irradiating the subject and the film with pulsed laser light and moving the film in the vicinity of the subject to produce a plurality of holographs on successive portions of the film.
Claim 2
Independent Claim
47 words
A method of producing holographs of a subject on laser light sensitive film which includes irradiating the subject and the film with pulsed laser light and moving the film in the vicinity of the subject to produce a plurality of holographs on successive portions of the film.
Claim 3
Dependent Claim
39 words
A method of producing holographs as claimed in Claim 1 in which the moving of the film is intermittent and synchronised with the pulsed emission of laser light so that the film is stationary when a pulse is emitted.
Claim 4
Dependent Claim
38 words
A method of producing holographs as claimed in Claim 1 in which the film is a continuous sheet of laser light sensitive material and the feed is continuous while the film is being exposed by pulsed laser light.
Claim 5
Independent Claim
21 words
A method of producing holographs as claimed in any one of the preceding claims in which the subject is a hologram.
Claim 6
Independent Claim
25 words
A method of producing holographs as claimed in any one of the preceding claims in which the pulse duration is between 8 and 350 nanoseconds.
Claim 7
Dependent Claim
19 words
A method of producing holographs as claimed in Claim 5 in which the pulse duration is about 50 nanoseconds.
Claim 8
Dependent Claim
110 words
Apparatus for carrying out the method as claimed in any one of the preceding claims including a source of pulsed laser light and means for collimating the laser light or for providing diverging or converging laser light, laser light-sensitive film feed means including a first spool for storing a reel of unexposed laser light sensitive film, guide means for guiding the film from the first spool passed an'aperture through which the laser light passes, a second spool for receving the exposed length of film and means for moving the film passed the aperture in sychronism with the emission of pulses from the laser to expose successive portions of the film.
Claim 9
Dependent Claim
30 words
Apparatus as claimed in Claim 7 in which the guide means comprises a succession of rollers and spaced vertically disposed plates between which the film moves as it passes the-aperture.
Claim 10
Dependent Claim
54 words
Apparatus as claimed in either Claim 7 or Claim 8 in which the means for moving the film comprises an electric motor driving a sprocket wheel around which the film passes, the drive being selectively continuous or intermittent through a Geneva Cross mechanism or a-solenoid engergised in sychronism with the firing of the laser.
Claim 11
Dependent Claim
31 words
Apparatus for carrying out the method as claimed in any one of claims 1 to 6 substantially as herein described with reference to Figures 4 to 11 of the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
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