Transmissive Reflective Optical System for Compact Aberration Correction
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Solution Overview
Problem
Existing optical systems face challenges in efficiently controlling light rays with large aperture diameters and correcting aberrations while maintaining a compact size, particularly when using reflective surfaces.
Innovation Solution
The optical system employs a configuration with a first and second transmissive reflective surface convex on the enlargement side, combined with a quarter waveplate and lenses, to achieve telecentricity and correct aberrations, using polarization-selective elements and a fully opened diaphragm to manage light paths efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If reflective surfaces are used to control light rays, then light path control is improved, but device size increases
Solution Approach 1:
The patent combines multiple optical functions (reflection, polarization control, waveplate function) into a single integrated optical element. The transmissive reflective surface integrates the reflection function with the quarter waveplate and lens functions, eliminating the need for separate components and reducing overall device size while maintaining effective light path control.
Solution Approach 2:
The transmissive reflective surface serves multiple functions simultaneously: it reflects light rays at specific angles, acts as a quarter waveplate for polarization control, and provides lens functionality for focusing. This multi-functionality reduces the number of components needed and compactes the optical system.
2Use of energy by moving object
If large aperture diameters are used, then light transmission is improved, but aberration correction becomes more difficult
Solution Approach 1:
The patent changes the optical parameters by using transmissive reflective surfaces with specific polarization properties and quarter waveplate characteristics. This allows the system to achieve both large aperture for high light transmission and effective aberration correction through optimized parameter selection in the optical design.
Solution Approach 2:
The quarter waveplate acts as an intermediary element that mediates between the large aperture requirement and aberration correction. By controlling polarization states, it enables the optical system to achieve both high light transmission through large apertures and effective aberration correction through polarization-selective reflection.
3Volume of moving object
If transmissive reflective surfaces with convex surfaces are used, then compact size is reduced, but light path management complexity increases
Solution Approach 1:
The patent merges the light path management function into the transmissive reflective surface itself, which inherently guides light through its reflective and transmissive properties. The convex surface geometry naturally focuses and directs light rays, eliminating the need for separate light path management components and reducing overall system 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
This configuration allows for compact size reduction while maintaining high optical performance, correcting aberrations and ensuring sufficient light transmission, even with large aperture diameters.
Implementation Method 1
a quarter waveplate... Light from the enlargement side transmits through the first transmissive reflective surface and the quarter waveplate
Implementation Method 2
a first transmissive reflective surface... a second transmissive reflective surface... is reflected by the second transmissive reflective surface... is reflected by the first transmissive reflective surface
Data Source
AI summary
An optical system includes a fully opened diaphragm, and a first transmissive reflective surface, a quarter waveplate, and a second transmissive reflective surface, which are arranged in this order from an enlargement side to a reduction side. Light from the enlargement side transmits through the first transmissive reflective surface and the quarter waveplate in this order, is reflected by the second transmissive reflective surface to the enlargement side, transmits through the quarter waveplate, is reflected by the first transmissive reflective surface to the reduction side, and transmits through the quarter waveplate and the second transmissive reflective surface in this order toward the reduction side. Each of the first transmissive reflective surface and the second transmissive reflective surface has a convex surface facing the enlargement side. A predetermined inequality is satisfied.