Integrated Fresnel and Diffractive Optical Element for Module Miniaturization
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Solution Overview
Problem
Traditional optical modules require multiple discrete lenses for collimation and diffraction, leading to alignment errors, high assembly costs, and increased space usage, which complicates the assembly process and increases production costs.
Innovation Solution
Integration of a diffractive optical element with a Fresnel lens to form a single optical element that combines collimation and diffraction capabilities, reducing alignment errors and assembly complexity while minimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple discrete lenses are used for collimation and diffraction, then the optical functions can be achieved, but the alignment accuracy deteriorates and assembly complexity increases
Solution Approach 1:
The patent combines the collimation lens and diffractive optical element into a single integrated optical element. The collimation lens performs collimation of the light beam, and the diffractive optical element performs diffraction to form the preset pattern, both functions being achieved within one component rather than requiring separate lenses and precise alignment between multiple discrete optical elements.
2Reliability
If multiple sets of lenses are used, then the optical functions are achieved, but the assembly cost and production cost increase
Solution Approach 1:
The patent integrates multiple optical functions into a single optical element, reducing the number of components that need to be assembled. This integration reduces assembly cost and production cost while maintaining the reliability of optical functions, as fewer components mean fewer potential failure points and simpler assembly processes.
3Manufacturing precision
If multiple lenses are used for collimation and diffraction, then the optical performance is achieved, but the space occupied increases
Solution Approach 1:
The patent combines collimation and diffraction functions into a single integrated optical element, significantly reducing the space occupied compared to using multiple separate lenses. The integrated design allows both optical functions to be achieved within a compact form factor, enabling miniaturization of the overall optical module.
4Reliability
If multiple discrete lenses are used, then the optical functions are achieved, but the assembly time and man-hours increase
Solution Approach 1:
The patent integrates multiple optical functions into a single optical element, reducing the number of assembly steps and man-hours required. The integrated design allows for simpler assembly processes and faster production, improving productivity while maintaining the reliability of optical functions through reduced assembly complexity.
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 integrated optical element enhances alignment accuracy, reduces assembly costs and difficulty, and facilitates miniaturization of the optical module by eliminating the need for multiple lenses, resulting in improved optical performance and reduced production costs.
Implementation Method 1
a Fresnel lens which is connected to the diffractive optical element, such that the light beam may pass through the diffractive optical element after passing through the Fresnel lens
Implementation Method 2
after entering the optical elements and diffracting a pattern array of multiple light spots
Data Source
AI summary
An optical element (100) and an optical module (200), relating to the technical field of optics. The optical element comprises a diffractive optical element (110), and a Fresnel lens (120) connected to the diffractive optical element (110), such that a light beam that passes through the Fresnel lens (120) and is then transmitted through the diffractive optical element (110) forms a preset pattern. The assembly cost and the assembly difficulty can be reduced, and miniaturization of the optical module (200) can be facilitated.