Systems, devices, and methods for aperture-free hologram recording
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 9, 2022
Grant Date -
May 30, 2019
app pub date -
Nov 29, 2018
filing date -
Nov 30, 2017
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The apertures typically used for hologram recording create unwanted secondary holograms by diffracting light. Aperture-free hologram recording eliminates these unwanted secondary holograms. Aperture-free hologram recording includes applying a mask to the holographic recording medium. The mask controls the size of the recorded hologram like an aperture but does not create unwanted secondary holograms. Hologram fringes are only present in the desired recording area and a thin boundary region. The mask may be present during recording, or the mask may be used to pre-bleach the holographic recording medium. Pre-bleaching the holographic recording medium renders a portion of the holographic recording medium insensitive to light, the hologram is recorded in the light-sensitive portions of the holographic recording medium.
First Claim
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Family
International Classification(s)
- 2018 Application Filing Year
- G02B Class
- 11617 Applications Filed
- 8698 Patents Issued To-Date
- 74.88 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- G02B Class
- 0 % this patent is cited more than
- 3 Age
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