Optical Element Lattice Alignment for Image Distortion Control
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Solution Overview
Problem
Existing optical elements with microstructures in lattice patterns do not adequately consider the interaction between the shape of the light receiving surface and the microstructure arrangement, leading to asymmetric image distortion and reduced light use efficiency.
Innovation Solution
The microstructures are arranged in a lattice pattern with basic translation vectors parallel to the long and short axes of the light receiving surface, optimizing their arrangement to match the shape of the light receiving elements, thereby suppressing asymmetric image distortion and enhancing light use efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If microstructures are arranged in a lattice pattern without considering the light receiving surface shape, then the optical element can be manufactured with simple processes, but asymmetric image distortion occurs and light use efficiency is reduced
Solution Approach 1:
The patent applies asymmetry by aligning the microstructure lattice pattern with the rectangular light receiving surface shape. The basic translation vectors of the lattice are oriented parallel to the long and short axes of the rectangle, creating an asymmetric arrangement that matches the surface geometry. This suppresses asymmetric image distortion by ensuring the microstructure distribution is optimized for the specific shape of the light receiving surface.
Solution Approach 2:
The patent implements local quality by optimizing the microstructure arrangement specifically for the light receiving surface region. The lattice pattern is designed with basic translation vectors that are parallel to the axes of the light receiving surface, creating locally optimized microstructure distribution that matches the surface shape and reduces distortion in that specific region.
2Device complexity
If microstructures are arranged in a lattice pattern without optimizing for light receiving surface shape, then device complexity is reduced, but light use efficiency is reduced due to increased stray light
Solution Approach 1:
The patent uses asymmetry in the lattice arrangement by orienting the basic translation vectors parallel to the long and short axes of the rectangular light receiving surface. This asymmetric alignment reduces stray light generation by matching the microstructure pattern with the surface geometry, thereby improving light use efficiency without significantly increasing device complexity.
Solution Approach 2:
The patent applies parameter changes by optimizing the lattice parameters (basic translation vectors) to be parallel to the axes of the light receiving surface. This parameter optimization reduces the generation of stray light and improves light use efficiency by ensuring the microstructure arrangement is optimized for the specific geometric parameters of the surface.
3Manufacturing precision
If microstructures are arranged in a lattice pattern without considering light receiving surface shape, then manufacturing precision is maintained at basic level, but asymmetric image distortion and stray light increase
Solution Approach 1:
The patent applies asymmetry by aligning the lattice pattern with the rectangular light receiving surface. The basic translation vectors are oriented parallel to the long and short axes, creating an asymmetric arrangement that suppresses asymmetric image distortion and reduces stray light generation while maintaining basic manufacturing precision.
Solution Approach 2:
The patent implements local quality by optimizing the microstructure arrangement specifically for the light receiving surface region. The lattice pattern is designed with translation vectors parallel to the surface axes, creating locally optimized positioning that reduces distortion and stray light in the critical light receiving region.
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 arrangement suppresses asymmetric image distortion and reduces stray light, allowing for higher microstructure density and improved light use efficiency, particularly in regions of significant phase change.
Implementation Method 1
a plurality of microstructures arranged in a lattice pattern provides phase modulation to light to exert an optical function like a lens or a prism
Data Source
AI summary
Provided is an optical element that is disposed closer to an object side than a light receiving surface is. The optical element includes: a base material; and a planar optical functional layer including a plurality of microstructures arranged on the base material. The light receiving surface is formed in a rectangular shape having a long axis and a short axis, and a plurality of light receiving elements are arranged in a lattice pattern along the long axis and the short axis on the light receiving surface. The plurality of microstructures is arranged in a lattice pattern along two basic translation vectors. One of the basic translation vectors is parallel to at least one of the long axis and the short axis of the light receiving surface.