Adjustable Aperture Optics for Chief Ray Angle Sensor Testing
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Solution Overview
Problem
The challenge of efficiently testing CMOS image sensors with various lens modules without the need for costly and specific probe cards and testing sockets, due to the mismatched chief ray angles, which can result in image defects.
Innovation Solution
An optical device with a light-passing control module and adjustable aperture stop between lens groups, allowing for adjustment of the chief ray angle while maintaining similar optical specifications, enabling compatibility with different lens modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If specific lens modules are used for testing image sensors, then testing accuracy is improved, but device complexity and cost increase due to needing multiple probe cards and sockets
Solution Approach 1:
The patent adjusts the chief ray angle parameter of the lens module to match different image sensor requirements. By changing this specific optical parameter, the system can test various sensors with a single standardized testing socket, eliminating the need for multiple specialized fixtures while maintaining testing accuracy.
Solution Approach 2:
The patent creates a universal testing socket that can accommodate different image sensor types by adjusting the lens module's chief ray angle. This single multi-functional socket replaces numerous specialized sockets, reducing device complexity while maintaining the ability to accurately test different sensors.
2Measurement precision
If specific lens modules are used for testing image sensors, then testing accuracy is improved, but cost increases due to multiple probe cards and sockets
Solution Approach 1:
The patent changes the chief ray angle parameter of a standardized lens module to match different image sensor specifications. This approach allows using a single type of testing socket for all sensors, significantly reducing the cost of manufacturing multiple specialized fixtures while maintaining accurate testing.
Solution Approach 2:
The patent uses a standardized testing socket design that can be replicated and adjusted for different sensors rather than creating unique sockets for each sensor type. This copying approach reduces manufacturing costs through economies of scale.
3Adaptability or versatility
If chief ray angle is adjusted for different lens modules, then adaptability is improved, but device complexity increases due to adjustable components
Solution Approach 1:
The patent adjusts the chief ray angle parameter of the lens module to match different image sensor requirements. By changing this specific optical parameter, the system can test various sensors with a single standardized testing socket, eliminating the need for multiple specialized fixtures while maintaining testing accuracy.
Solution Approach 2:
The patent incorporates adjustable components in the lens module that allow dynamic adjustment of the chief ray angle. This enables the same physical hardware to adapt to different testing requirements, providing versatility without needing multiple fixed configurations.
Data Source
AI summary
An optical device includes a first lens group arranged between a light-passing module and an object side. A second lens group is arranged between the light-passing and an image sensor. The light-passing control module is disposed between the first lens group and the second lens group, and is configured to control amount of light incident based on a chief ray angle. The light-passing control module includes an aperture stop. The position of the aperture stop is adjustable along the optical axis of the optical device. Alternatively, the aperture stop is disposed inside a rotating bezel. The chief ray angle of the optical device is changed by adjusting the opening and the position of the aperture stop.