Ideal distribution CHMSL hologram with double exposure technique
First Claim
Patent Images
1. A process for recording a hologram comprising the steps of:
- first exposing a volume hologram recording medium with a first exposure intensity to record a first image which, upon playback, will diffract light over a first angular region of coverage such that the diffracted light has a first predetermined luminous intensity distribution over the first angular region of coverage; and
secondly exposing the volume hologram recording medium with a second exposure intensity to record a second image which upon playback will diffract light over a second angular region of coverage such that the light diffracted by the second image has a second predetermined luminous intensity distribution over the second angular region of coverage, wherein the second luminous intensity distribution is different from the first luminous intensity distribution.
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Abstract
A hologram that diffracts playback illumination over a wide angular range made pursuant to a technique that includes the steps of first exposing a volume hologram recording medium to record a first image which upon playback will diffract light over a first angular coverage, and then exposing the volume hologram recording medium to record a second image which upon playback will diffract light over a second angular coverage.
27 Citations
10 Claims
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1. A process for recording a hologram comprising the steps of:
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first exposing a volume hologram recording medium with a first exposure intensity to record a first image which, upon playback, will diffract light over a first angular region of coverage such that the diffracted light has a first predetermined luminous intensity distribution over the first angular region of coverage; and secondly exposing the volume hologram recording medium with a second exposure intensity to record a second image which upon playback will diffract light over a second angular region of coverage such that the light diffracted by the second image has a second predetermined luminous intensity distribution over the second angular region of coverage, wherein the second luminous intensity distribution is different from the first luminous intensity distribution. - View Dependent Claims (2, 3, 4, 5)
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6. A hologram made pursuant to a process comprising the steps of:
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first exposing a volume hologram recording medium with a first exposure intensity to record a first image which, upon playback, will diffract light over a first angular region of coverage such that the diffracted light has a first predetermined luminous intensity distribution over the first angular coverage; and secondly exposing the volume hologram recording medium with a second exposure intensity to record a second image which upon playback will diffract light over a second angular region of coverage that is greater than and encompasses the first angular region coverage such that the light diffracted by the second image has a second predetermined luminous intensity distribution over the portion of the second angular region of coverage that is beyond the first angular region of coverage, wherein the second luminous intensity distribution is different from the first luminous intensity distribution. - View Dependent Claims (7, 8)
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9. A hologram comprising:
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a first recorded image which, upon playback, provides diffracted light having a first predetermined luminous intensity distribution over a first angular region of coverage; and a second recorded image which, upon playback, provides diffracted light having a second predetermined luminous intensity distribution, different from said first predetermined luminous intensity distribution, over a second angular region of coverage. - View Dependent Claims (10)
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Specification