Optical Element with Segmented Regions for Projection Aberration Control
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Solution Overview
Problem
Existing projection apparatuses face challenges in suppressing optical aberrations and maintaining a wide angle of view due to the optical elements used, which affects the quality of the projected image.
Innovation Solution
The proposed optical element is designed with distinct regions, each with different optical surfaces having refractive power, arranged between the light source and the light deflector. This configuration allows for different optical actions on the incident and emission sides of each region, effectively suppressing aberrations and maintaining a wide angle of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single optical element is used between the light source and light deflector, then the device complexity is reduced, but optical aberrations increase and the angle of view is reduced
Solution Approach 1:
The optical element is divided into a first region and a second region with different optical actions. The first region has an optical surface that refracts light from the light source toward the light deflector, while the second region has a different optical surface configuration for receiving and emitting light from the light deflector. This segmentation allows each region to be optimized for its specific function, reducing overall optical aberrations while maintaining a relatively simple single-element structure.
Solution Approach 2:
Different optical surfaces are provided on different regions of the optical element. The incident side of the first region, the emission side of the first region, the incident side of the second region, and the emission side of the second region can all have different optical actions. This local quality approach allows each surface to be optimized for its specific optical function, improving aberration control without requiring multiple separate optical elements.
2Object-affected harmful factors
If an optical element is added to control stray light, then stray light is suppressed, but the angle of view is reduced and optical aberrations increase
Solution Approach 1:
The optical element changes the optical parameters (refractive power, surface curvature) differently for different regions. By providing optical surfaces with different optical actions on the incident and emission sides of both the first and second regions, the element can control stray light in specific directions while preserving the main optical path and angle of view characteristics.
3Manufacturing precision
If optical surfaces with different optical actions are provided on multiple sides of the optical element, then various aberrations are suppressed, but the manufacturing complexity increases
Solution Approach 1:
Multiple optical functions are merged into a single optical element by integrating the first region and second region with their respective optical surfaces into one component. This combining approach achieves complex aberration suppression that would normally require multiple separate optical elements, while simplifying the overall system structure and potentially reducing alignment complexity.
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
The optical element effectively suppresses various aberrations, enhances the quality of the projected image, and maintains a wide angle of view, thereby improving the overall performance of the projection apparatus.
Implementation Method 1
an optical surface having a different optical action is provided on at least one side of an incident side and an emission side of the first region and an incident side and an emission side of the second region
Data Source
AI summary
An optical element, which is arranged between a light source and a light deflector reflecting and two-dimensionally deflecting incident light, includes: a first region on which light from the light source is caused to be incident and which emits the light to the light deflector; and a second region which is different from the first region, on which light reflected and two-dimensionally deflected by the light deflector is incident, and which emits the light to an outside, and an optical surface having a different optical action is provided on at least one side of an incident side and an emission side of the first region and an incident side and an emission side of the second region.