Hologram Production Lens Angle Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing computer-generated holograms are limited by their inability to account for the properties of light sources and substrate geometries, leading to sub-optimal reconstruction and limited adaptability to different radiation characteristics and curved surfaces.
Innovation Solution
The method involves adjusting the angle of incidence of the reference beam on a light-sensitive recording medium by changing the point of incidence on a lens, allowing for the production of holograms that can be adapted to various light sources and curved substrates, enabling flexible production of transmission, reflection, and edge-lit holograms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed angle of incidence is used for the reference beam, then the production process is simple, but the hologram cannot be adapted to different light source characteristics and substrate geometries
Solution Approach 1:
The patent implements dynamic adjustment of the reference beam angle of incidence by making the lens movable relative to the reference beam path. This allows the system to adapt to different light source characteristics (such as divergence angles) and substrate geometries (flat or curved) while maintaining a relatively simple overall device structure. The dynamic element is specifically the lens position adjustment mechanism that changes the point where the reference beam hits the lens.
2Manufacturing precision
If the reference beam angle is adjusted for each sub-hologram, then reconstruction accuracy is improved, but the production time increases
Solution Approach 1:
The patent changes the angle of incidence parameter of the reference beam systematically for different sub-holograms according to the specific reconstruction requirements. By adjusting the lens position to achieve different incident angles, the system optimizes reconstruction accuracy for each sub-hologram region while managing the overall production efficiency through controlled parameter variation.
3Adaptability or versatility
If simple substrate shapes are used, then the manufacturing process is straightforward, but the application flexibility is limited
Solution Approach 1:
The patent applies different reference beam incident angles to different regions (sub-holograms) of the recording medium, creating local optimization for each area. This allows the final hologram to be applied to substrates with various geometries (flat or curved surfaces) while maintaining good reconstruction quality in each local region, thereby achieving both manufacturing feasibility and application flexibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for the creation of holograms that can be accurately reconstructed on curved surfaces and adapted to diverse light sources, enhancing the flexibility and accuracy of hologram production.
Implementation Method 1
The change in the angle of incidence of the reference beam is achieved by changing the point of incidence of the reference beam on a lens through which the reference beam passes
Implementation Method 2
a hologram consisting of a plurality of sub-holograms is applied by exposure into a light-sensitive recording medium. The portions of the recording medium corresponding to the individual sub-holograms are successively exposed to an object beam and a reference beam.
Data Source
AI summary
A method for producing a computer-generated hologram including producing a reference beam, producing an object beam, applying computer-generated information regarding the hologram to the object beam, overlapping the object beam and the reference beam on or in a light-sensitive recording medium in order to apply the hologram by exposure, wherein several portions of the light-sensitive recording medium are exposed, one after the other, to the object beam and the reference beam simultaneously in order to produce a plurality of sub-holograms, wherein the angle of incidence at which the reference beam hits the surface of a first portion of the recording medium is different from the angle of incidence at which the reference beam hits the surface of a second portion of the recording medium. A change in the angle of incidence of the reference beam is achieved by changing the point of incidence of the reference beam on a lens.