Domain-Segmented Phase Modulation for Uniform Projector Illumination
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Solution Overview
Problem
Conventional spatial light phase modulation methods assume uniform incident light intensity, leading to superimposition of non-uniform intensity distributions on reproduced images, and are inefficient in handling variations in light intensity.
Innovation Solution
An illumination apparatus with a phase modulation section and control section that divides the phase modulation plane into domains, using a common phase distribution determined by the Freeform method to average light intensity distributions and adjust domain divisions based on incident light uniformity, incorporating lens components for precise reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If spatial light phase modulation is performed using a conventional Freeform method, then light utilization efficiency is improved, but the reproduced image quality deteriorates when incident light intensity distribution is non-uniform
Solution Approach 1:
The phase modulation plane is divided into multiple domains, and independent phase distributions are calculated for each domain based on the actual non-uniform incident light intensity distribution. This segmentation allows each domain to be optimized separately, preventing the superimposition of intensity distribution patterns on the reproduced image while maintaining high light utilization efficiency through phase modulation.
2Reliability
If the phase modulation plane is divided into multiple domains, then robustness against incident light intensity distribution is improved, but device complexity increases
Solution Approach 1:
The phase modulation plane is divided into multiple domains, with each domain having an independently calculated phase distribution based on the Freeform method and actual incident light intensity measurement. This segmentation improves robustness by allowing each domain to be optimized separately, while the control section automatically manages the complexity through integrated calculations.
Solution Approach 2:
The system measures the actual incident light intensity distribution and uses this feedback to calculate and adjust the phase distributions for each domain. This feedback mechanism enables the system to adapt to variations in light source characteristics, maintaining high reproduced image quality and robustness without requiring manual intervention or complex external calibration.
3Object-affected harmful factors
If domain divisions are increased to improve robustness, then resistance to non-uniform light intensity is improved, but processing time increases
Solution Approach 1:
The phase modulation plane is divided into multiple domains to improve robustness against non-uniform light intensity distribution. The control section calculates phase distributions for each domain based on the Freeform method and actual incident light intensity measurements, enabling the system to resist harmful intensity variations while maintaining efficient processing through automated calculations.
Solution Approach 2:
The system pre-calculates and stores phase distributions for multiple domains based on the Freeform method and typical incident light intensity distributions. This preliminary action allows the control section to quickly select and apply appropriate phase distributions without performing time-consuming real-time calculations, thereby reducing processing time while maintaining robustness.
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 apparatus effectively mitigates the influence of non-uniform incident light intensity on the reproduced image, maintaining consistent light distribution and improving robustness and resolution by dynamically adjusting domain divisions.
Implementation Method 1
a phase modulation section that performs spatial light phase modulation on incident light from the light source section
Data Source
AI summary
Provided by the present technology is an illumination apparatus including a light source section, a phase modulation section, and a control section. The light source section has a light emitting element. The phase modulation section performs spatial light phase modulation on incident light from the light source section. The control section controls the phase modulation section in such a manner that a plurality of domains formed by dividing a phase modulation plane of the phase modulation section reproduces a light intensity distribution based on a common phase distribution determined on the basis of a Freeform method in a common region on a projection plane.