Dual Light Source Illumination System for Night Vision Projectors
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Solution Overview
Problem
Conventional night vision projectors suffer from reduced luminance and increased heat generation due to light attenuation and absorption by filters, and require complex apparatuses to provide both visible and infrared light images, limiting their effectiveness and usability.
Innovation Solution
A projection device with a dual light source system, including a first light source for visible light and a second light source for pure infrared light, guided by a dichroic layer to directly generate and process both images without the need for additional filters or complex components, enhancing luminance and light utilization efficiency while minimizing heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional night vision projectors use visible light filters and infrared light filters to generate visible light images and infrared light images, then both types of images can be produced, but light energy is significantly attenuated and heat energy is greatly generated
Solution Approach 1:
The illumination system is segmented into two independent light sources: a first light source for visible light and a second light source for infrared light. Each light source directly generates the required wavelength without needing filters, thereby avoiding energy loss and heat generation associated with filtering processes.
Solution Approach 2:
The projection device is designed with multi-functionality to provide both visible light projection and infrared light projection capabilities within a single system. The light guiding device guides both visible light and infrared light to the image-forming system, enabling the device to function in both daylight and nighttime conditions without requiring separate apparatuses.
2Adaptability or versatility
If conventional night vision projectors use multiple filters and reflectors to process light rays, then both visible and infrared images can be formed, but the device volume becomes bulky
Solution Approach 1:
The system segments the light processing function by using a light guiding device with a dichroic layer that separates visible light and infrared light paths. This segmentation allows each light type to be processed independently with minimal components, reducing the overall device volume while maintaining dual functionality.
Solution Approach 2:
The illumination system merges the visible light source and infrared light source into a single integrated system with a shared image-forming system and projection lens. The light guiding device combines both light paths, allowing the device to achieve dual functionality in a compact form factor.
3Reliability
If conventional systems use separate apparatuses for visible light image and infrared light image, then each image type can be optimized, but the system complexity and apparatus requirements increase
Solution Approach 1:
The projection device is designed as a universal system that can perform both visible light projection and infrared light projection using a single apparatus. The light guiding device and image-forming system are configured to handle both light types, eliminating the need for separate apparatuses while maintaining optimized image quality for both modes.
Solution Approach 2:
The system merges multiple functions (visible light generation, infrared light generation, image formation, and projection) into a single integrated device. The first light source and second light source share the same optical path and image-forming system, reducing system complexity while maintaining reliable performance for both image types.
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 enables high-luminance, efficient generation of both visible and infrared light images within a single apparatus, reducing heat generation and eliminating the need for complex components, thus improving simulation accuracy and usability.
Implementation Method 1
a light guiding device adapted to guide the visible light and the infrared light to the image-forming system
Data Source
AI summary
The projection device includes an image-forming system and the illumination system. The illumination system includes a first light source device, a second light source device and a first light guiding device. The first light source device generates a visible light, while the second light source device directly generates a substantially pure infrared light. The light guiding device is adapted to guide the visible light and the infrared light to the image-forming system for processing to make the visible light form a visible light image and make the infrared light form an infrared light image.