Multi-Wavelength Image Capturing Module with Deeper Focal Depth
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Solution Overview
Problem
Conventional image capturing systems with bright optical systems experience shallow focal depth, leading to significant blurring of images when subjects are at varying distances, as they struggle to maintain both wide-angle and high-resolution performance with simple image processing.
Innovation Solution
An image capturing module comprising multiple systems capturing light in different wavelength regions (R, G, B) with one system having a deeper focal depth, specifically the G wavelength region, which combines signals to generate a brightness signal using pre-set weights, reducing blur by aligning optical axes and using optical systems with deeper focal lengths and smaller diaphragms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a bright optical system is used to achieve wide angle and high resolution, then the resolution performance is improved, but the focal depth becomes shallow causing significant blurring of defocused subjects
Solution Approach 1:
The patent divides the image capturing function into multiple independent image capturing systems, each capturing light in different wavelength regions (R, G, B). Each system can be optimized for specific characteristics, with at least one system having a deeper focal depth than others, allowing the system to capture images with both wide angle and maintained focus across varying distances
Solution Approach 2:
The patent combines the wavelength component signals from multiple image capturing systems in the image generating section to generate a composite image signal. By merging signals from systems with different focal depths and wavelength sensitivities, the final image achieves both wide angle coverage and improved focal depth, resolving the contradiction between resolution and focus stability
2Stability of the object's composition
If multiple image capturing systems with different wavelength regions are used, then the focal depth is deepened, but the device complexity increases
Solution Approach 1:
Each image capturing system captures light in different wavelength regions (R, G, B), making them multi-functional for capturing various aspects of the image. The G wavelength system specifically provides deeper focal depth while all systems contribute to the overall image quality, allowing the system to achieve deep focal depth without proportionally increasing complexity
Solution Approach 2:
The patent changes the parameter of wavelength region for each image capturing system, with at least one system optimized for green wavelength to provide deeper focal depth. By varying the wavelength parameter across different systems rather than using identical systems, the patent achieves deeper focal depth while managing complexity through functional differentiation
Data Source
AI summary
A subject image with little blur is provided even when the subject exists in a wide range of distance. An image capturing module includes: a plurality of image capturing systems, each including an optical system and capturing a an image of a subject by light in a wavelength region different from each other to generate a wavelength component signal representing an image of light in the corresponding wavelength region; and an image generating section that combines the wavelength component signals generated by the plurality of image capturing systems thereby generating an image signal representing an image of the subject, where an image capturing system, from among the plurality of image capturing systems, which generates a wavelength component signal having a greater contribution to brightness in the image of the subject includes an optical system having a deeper focal depth.