Illumination device, projection apparatus and projection-type image display apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 16, 2021
Grant Date -
Feb 21, 2019
app pub date -
Oct 24, 2018
filing date -
Sep 8, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An optical device including a hologram recording medium that can reproduce an image of a reference member and an irradiation unit that emits a coherent light beam to the optical device. The irradiation unit includes a light source for emitting a coherent light beam and a scanning device capable of adjusting a reflection angle of the coherent light beam emitted from the light source and that makes a reflected coherent light beam scan the hologram recording medium. The light source has light sources for emitting coherent light beams having different wavelength ranges. The hologram recording medium has a plurality of recording areas to be scanned with a plurality of coherent light beams reflected by the scanning device, respectively. Each of the plurality of recording areas has an interference fringe that diffracts a coherent light beam of the corresponding wavelength range.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2018 Application Filing Year
- H04N Class
- 17795 Applications Filed
- 13663 Patents Issued To-Date
- 76.78 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- H04N Class
- 0 % this patent is cited more than
- 4 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Sep 16, 2028 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 16, 2032 |
