Laser Projector Diffractive Optical Assembly Clamping Mechanism
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Solution Overview
Problem
The existing laser projectors face issues with the diffractive optical element falling off due to the failure of glue adhesion, leading to direct emission of laser light that can burn users, and there is a need for a secure and reliable mounting mechanism.
Innovation Solution
A laser projector design that includes a diffractive optical assembly with a diffractive optical element and a top cover fixedly connected, where the top cover is partially located outside the lens barrel to clamp it securely, preventing the element from falling off and ensuring safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the diffractive optical element is directly adhered to the lens barrel by glue, then the manufacturing process is simple, but the reliability of the mounting is poor and the element may fall off
Solution Approach 1:
The mounting structure is segmented into multiple components: the lens barrel, the diffractive optical element, and a separate fixing structure with clamping arms. This segmentation allows the fixing structure to independently secure the element without compromising the simplicity of the overall manufacturing process, thereby resolving the contradiction between ease of manufacture and mounting reliability.
Solution Approach 2:
The fixing structure is pre-assembled with the lens barrel before the diffractive optical element is installed. The clamping arms are positioned and adjusted in advance to ensure proper alignment and secure mounting, which prevents mounting errors and enhances reliability while maintaining manufacturing simplicity.
2Object-affected harmful factors
If the diffractive optical element is securely clamped, then the safety is improved, but the device complexity increases
Solution Approach 1:
The fixing structure is merged with the lens barrel assembly, where the clamping arms are integrated into the existing lens barrel structure. This merging approach provides secure clamping to prevent laser light safety hazards while avoiding the need for completely separate, complex mounting mechanisms, thus balancing safety improvement with device complexity.
Solution Approach 2:
The fixing structure acts as an intermediary component between the lens barrel and the diffractive optical element. It provides the necessary clamping force and secure mounting without requiring direct complex integration, thereby enhancing safety while maintaining relatively simple device architecture.
3Stability of the object's composition
If the diffractive optical element is firmly fixed, then the optical path stability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The fixing structure applies clamping force locally at specific points on the diffractive optical element through the clamping arms, rather than requiring uniform precision across the entire element. This localized fixing approach ensures optical path stability while reducing the overall manufacturing precision requirements by focusing constraints only where necessary.
Solution Approach 2:
The fixing structure and clamping arms are pre-positioned and pre-adjusted during assembly to ensure proper alignment of the diffractive optical element. This preliminary action ensures that the element is firmly fixed with stable optical path without requiring extremely high manufacturing precision, as the positioning is finalized during the pre-assembly stage.
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 secure clamping mechanism prevents the diffractive optical element from falling off, ensuring that laser light always passes through the intended optical path, enhancing user safety and the reliability of the laser projector.
Implementation Method 1
a diffractive optical element (DOE) of a laser projector is required to be provided in an emission path of laser
Data Source
AI summary
A laser projector, an image acquisition device, and an electronic apparatus are provided. The laser projector includes a substrate assembly, a lens barrel, and a diffractive optical assembly. The lens barrel includes a lens barrel sidewall provided to the substrate assembly. The lens barrel sidewall includes a first face and a second face opposite to each other. The second face is joined to the substrate assembly. The diffractive optical assembly is provided to the first face. The diffractive optical assembly includes a diffractive optical element and a top cover, and the diffractive optical element and the top cover are fixedly connected. The diffractive optical element is located within the lens barrel, and the top cover is at least partially located outside the lens barrel and clamps the lens barrel together with the diffractive optical element.