Optical devices and methods of manufacture thereof
Number of patents in Portfolio can not be more than 2000
United States of America
Stats
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Mar 4, 2025
Grant Date -
Feb 15, 2024
app pub date -
Jan 11, 2022
filing date -
Jan 11, 2022
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An optical device is provided that exhibits a variable optical effect upon illumination. The optical device has a diffractive structure comprising: a portion of a first kinoform diffractive structure that encodes a first image, arranged to form a first diffractive region (11) of the diffractive structure; and a portion of a second kinoform diffractive structure that encodes a second image, arranged to form a second diffractive region (13) of the diffractive structure; wherein the first diffractive region and the second diffractive region are laterally separate; and each of the first diffractive region and the second diffractive region are discernible by the naked human eye. Methods of manufacture of such optical devices are also disclosed.
First Claim
all claims..Other Claims data not available
Family
Country | kind | publication No. | Filing Date | Type | Sub-Type |
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- DE LA RUE INTERNATIONAL LIMITED
International Classification(s)

- 2022 Application Filing Year
- B42D Class
- 173 Applications Filed
- 71 Patents Issued To-Date
- 41.05 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Fournier, Frederic | Basingstoke, GB | 11 | 16 |
# of filed Patents : 11 Total Citations : 16 | |||
Holmes, Brian | Basingstoke, GB | 34 | 182 |
# of filed Patents : 34 Total Citations : 182 | |||
King, Maria | Basingstoke, GB | 4 | 0 |
# of filed Patents : 4 Total Citations : 0 |
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Patent Citation Ranking
- 0 Citation Count
- B42D Class
- 0 % this patent is cited more than
- < 1 Age
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