Method and device for producing contact copies
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 19, 2014
Grant Date -
Jan 31, 2013
app pub date -
Apr 7, 2011
filing date -
Apr 9, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method and a device are described for producing copies/replica of a volume reflection hologram wherein a holographic film (4) is guided over a drum with polygon cross-section having at least two planar (polygon) master surfaces (3) to each of which at least one master (7) is attached in the circumferential direction, where the film is brought into contact with at least one master hologram (7) and its entire surface is exposed to laser. It is essential that to at least one of the master surfaces (5) with the film guided over it, a laser exposure unit (22) is assigned which allows full exposure of the respective master surface to parallel, coherent laser beams (6), and that the at least one exposure unit (22) follows section wise the rotational movement of the drum by a splitting angle with equal velocity and exposes the corresponding master surface (5) to then be reset quickly again and perform the same angular displacement and exposure together with the next master surface. In this manner, a highly productive multiplication even of large reflection holograms in high quality is possible.
First Claim
Other Claims data not available
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- G03B Class
- 13.66 % this patent is cited more than
- 11 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 19, 2026 |
