EP0128033A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Improvements in holography
Assignee: Opsec Security Group Ltd
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Filing: 1984-06-04
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Granted: —
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Expires: 2004-06-04
Abstract
Abstract A method of producing a holograph of a large object, for example, a building, in which a photographic transparency of the building is taken and laser light passed through the transparency to irradiate a 3-dimensional scale model of the building, the holograph being produced either by reflection or transmission.
Inventors
- 👤 James Robert Copp
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 22:18
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/04; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
A method of producing holographs of a subject on laser light-sensitive emulsion which includes irradiating the laser light-sensitive emulsion and a scale representation of a subject with laser light and wherein the energy distribution across the laser light incident upon the scale representation varies in accordance with a partially transmitting optical element or elements depicting the subject from the same apparent viewpoint as the laser light irradiates the scale representation.
Claim 2
Independent Claim
70 words
A method of producing holographs of a subject on laser light-sensitive emulsion which includes irradiating the laser light-sensitive emulsion and a scale representation of a subject with laser light and wherein the energy distribution across the laser light incident upon the scale representation varies in accordance with a partially transmitting optical element or elements depicting the subject from the same apparent viewpoint as the laser light irradiates the scale representation.
Claim 3
Dependent Claim
18 words
The method as claimed in Claim 1, in which the partially transmitting optical element is a photographic transparency.
Claim 4
Dependent Claim
22 words
The method as claimed in either Claim 1 or Claim 2, in which the laser light is derived from a pulse laser.
Claim 5
Independent Claim
21 words
A method of producing holographs substantially as herein described with reference to either Figure 1 or Figure 2 of the drawings.
Claim 6
Independent Claim
21 words
A method of producing holographs substantially as herein described with reference to either Figure 1 or Figure 2 of the drawings.
Claim 7
Dependent Claim
15 words
A holograph when produced by the method claimed in any one of the preceding claims.
References Cited (Backward Citations)
US3533104A
Cited
US3767284A
Cited
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