Micro-Structured Optical Lens for Low-Interference Infrared Sensing
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Solution Overview
Problem
Infrared sensing arrays are susceptible to external environmental interference and require additional optical lenses, leading to complex manufacturing processes and high costs.
Innovation Solution
A sensing device with a first substrate and a second substrate assembled opposite to the first, featuring an optical lens with micro-structures that overlap with sensing units, where the pitch between micro-structures is less than or equal to the maximum wavelength value, simplifying manufacturing and reducing environmental interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an additional optical lens is used to improve sensing performance, then the sensing capability is enhanced, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent integrates the optical lens function directly into the second substrate by forming micro-structures (convex or concave) on the substrate surface. This merging of the lens function with the substrate eliminates the need for separate optical lens components, thereby reducing manufacturing complexity while maintaining enhanced sensing performance through improved light focusing capability.
2Measurement precision
If an additional optical lens is used to improve sensing performance, then the sensing capability is enhanced, but the manufacturing cost increases
Solution Approach 1:
By combining the optical lens function with the second substrate through direct micro-structure formation, the patent eliminates the need for separate lens components and their associated assembly processes. This integration reduces the total number of parts, simplifies the manufacturing workflow, and lowers overall production costs while achieving the desired sensing performance enhancement.
3Measurement precision
If the pitch between micro-structures is reduced to enhance optical performance, then the light focusing capability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent specifies that the pitch between adjacent micro-structures is less than or equal to the maximum wavelength value of the target light. This parameter constraint optimizes the light focusing capability by ensuring appropriate spacing for effective optical interaction. The pitch is designed to be within a specific range that balances optical performance with manufacturability, avoiding excessively small dimensions that would be difficult to fabricate.
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 enhances sensing performance by minimizing external interference and simplifies manufacturing, thereby reducing costs and improving signal accuracy.
Implementation Method 1
the second substrate has an optical lens in the overlapping area, the optical lens comprises a plurality of micro-structures
Implementation Method 2
a pitch between the plurality of micro-structures is less than or equal to a maximum wavelength value of the wavelength range
Data Source
AI summary
A sensing device includes: a first substrate; a plurality of sensing units disposed on the first substrate, wherein the plurality of sensing units are used for sensing light with wavelengths within a wavelength range; and a second substrate disposed opposite to the first substrate and assembled to the first substrate, wherein the second substrate has an overlapping area overlapping with the plurality of sensing units in a normal direction of the first substrate, wherein the second substrate has an optical lens in the overlapping area, the optical lens includes a plurality of micro-structures, and a pitch between the plurality of micro-structures is less than or equal to a maximum wavelength value of the wavelength range.