Multi-Lens Projector Optics for Lower Pupil Energy Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lighting devices and projector devices face challenges in reducing optical energy density at the pupil position, particularly when using spatial light phase modulation, which can increase safety risks.
Innovation Solution
A lighting device and projector device that includes a spatial light phase modulator generating multiple reproduced images at intervals on an image surface, projected via different projection lenses, with a control unit adjusting the position, shape, and interval of these images to disperse optical energy and reduce density at the pupil position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a reproduced image is generated by spatial light phase modulation, then light utilization efficiency is enhanced, but optical energy density increases at the pupil position of the projection lens
Solution Approach 1:
The patent divides the optical system into multiple projection lenses (first projection lens and second projection lens), each projecting reproduced images through different pupil positions. This segmentation disperses the optical energy that would otherwise concentrate at a single pupil position, reducing optical energy density while maintaining efficient light utilization through phase modulation
Solution Approach 2:
The patent introduces a new dimension by using multiple pupil positions in the optical path. Instead of a single projection path, the system employs multiple projection lenses with different pupil positions, effectively distributing optical energy across multiple spatial dimensions and reducing concentration at any single point
2Object-affected harmful factors
If multiple reproduced images are projected via different projection lenses, then optical energy density at pupil position is reduced, but device complexity increases
Solution Approach 1:
Each projection lens serves multiple functions: it projects reproduced images to the projection surface, disperses optical energy to reduce pupil position density, and contributes to forming the final projected image. This multi-functionality reduces the need for additional dedicated components, offsetting the complexity increase from having multiple lenses
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 solution effectively reduces optical energy density at the pupil position, enhancing safety and improving light utilization efficiency while maintaining image quality and resolution.
Implementation Method 1
a spatial light phase modulator that generates a plurality of reproduced images at intervals on an image surface by performing spatial light phase modulation on incident light from the light source unit
Implementation Method 2
a projection unit that superimposes and projects the plurality of reproduced images on a projection surface via different projection lenses
Data Source
AI summary
A lighting device according to the present technology includes: a light source unit that has a light emitting element; a spatial light phase modulator that generates a plurality of reproduced images at intervals on an image surface by performing spatial light phase modulation on incident light from the light source unit; and a projection unit that superimposes and projects the plurality of reproduced images on a projection surface via different projection lenses.