Optical Lens Fixing Assembly With Stray-Light Shielding
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Solution Overview
Problem
Optical projection systems suffer from poor optical performance and reliability due to stray light irradiating on stainless-steel spring pieces, causing discoloration and volatilization, which affects the stability of the optical lens fixation.
Innovation Solution
An optical lens fixing device with a protection sheath made of aluminum and a stainless-steel pressing plate, where the pressing plate is clamped and fixed by a protection sheath assembly, preventing direct light irradiation and forming a wrapping structure to maintain optical performance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stainless-steel spring pieces are used to fix the optical lens, then the lens can be securely mounted, but the stray light causes discoloration and volatilization under long-term irradiation, reducing reliability
Solution Approach 1:
The patent introduces an aluminum protection sheath as an intermediary component between the stray light and the stainless-steel pressing plate. The protection sheath is fixed to the optical lens holder and completely wraps the pressing plate, serving as a shield that blocks stray light from directly irradiating the pressing plate, thereby preventing discoloration and volatilization while maintaining the fixing function
Solution Approach 2:
The protection sheath is designed as a shell structure made of aluminum material that completely wraps the pressing plate. This shell structure provides physical protection against stray light irradiation, creating a barrier that prevents the harmful light from reaching the pressing plate surface, thus solving the discoloration and volatilization problems
2Device complexity
If the pressing plate is directly exposed to fix the lens, then the structure is simple, but the pressing plate becomes yellow and fails under long-term stray light irradiation
Solution Approach 1:
The protection sheath is designed to completely wrap the pressing plate, forming a nested structure where the pressing plate is housed inside the protection sheath. This nesting arrangement protects the pressing plate from stray light while maintaining a compact overall structure, extending the service life without significantly increasing device complexity
Solution Approach 2:
The fixing structure is segmented into two functional parts: the pressing plate for clamping the lens and the protection sheath for shielding against stray light. This segmentation allows each component to perform its specific function optimally - the pressing plate provides mechanical fixing while the protection sheath provides light shielding, thereby extending service life
3Device complexity
If glue is used to fix the optical lens, then the structure is simple, but the fixation reliability and stability are poor
Solution Approach 1:
The patent replaces the chemical bonding method (glue) with a mechanical clamping system consisting of the pressing plate and protection sheath. The pressing plate applies mechanical pressure to clamp the optical lens against the holder, providing reliable and stable fixation that can be adjusted and maintained, superior to glue in terms of fixation stability
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 ensures good optical performance and high reliability by shielding the pressing plate from stray light, preventing discoloration and volatilization, thus enhancing the stability of the optical lens fixation.
Implementation Method 1
the protection sheath is made of aluminum, and the pressing plate is made of stainless-steel... to avoid a phenomenon such as discoloration or volatilization caused by stray light directly irradiating on the pressing plate
Data Source
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AI summary
The present disclosure provides an optical lens fixing device including an optical lens holder for supporting an optical lens, and a pressing plate protection sheath assembly fixing the optical lens to the optical lens holder. The pressing plate protection sheath assembly includes a protection sheath and a pressing plate, the protection sheath is fixed on the optical lens holder, a receiving recess is provided in the protection sheath, the pressing plate is fixed in the receiving recess, and the pressing plate and the protection sheath jointly clamp the lens. The present disclosure further provides an optical projection system. Compared with the related art, the optical lens fixing device and the optical projection system of the present disclosure have good optical performance, high reliability and high stability.