Lens Module Stray Light Blocking via Partial Wall Attachment
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Solution Overview
Problem
Existing lens modules suffer from reduced imaging quality due to stray light penetrating through the lenses and entering the imaging surface receptor, which is not effectively mitigated by current designs.
Innovation Solution
The lens module incorporates a design where a portion of the lens side wall is attached to the lens barrel's inner wall, leaving a non-attached gap that reflects stray light, with specific size and shape optimizations to enhance light extinction and maintain installation precision, including varying the radius of the non-attached part along the optical axis and applying extinction or Lambertian treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lens side wall is fully attached to the lens barrel inner wall, then the installation precision is improved, but stray light enters the imaging surface receptor causing imaging quality to deteriorate
Solution Approach 1:
The lens side wall is divided into two distinct parts: a first part that is attached to the lens barrel inner wall for precise positioning, and a second part that remains unattached to create a gap. This gap serves as a light blocking structure that prevents stray light from reaching the imaging surface receptor, thereby resolving the contradiction between installation precision and stray light interference.
Solution Approach 2:
Different portions of the lens side wall are given different functional qualities: the first part (attached portion) provides mechanical stability and positioning accuracy, while the second part (unattached portion) provides optical function by blocking stray light. This local differentiation allows each part to optimize its specific function without compromising the other.
2Object-affected harmful factors
If a non-attached gap is created between the lens side wall and lens barrel inner wall, then stray light is blocked improving imaging quality, but the installation precision and stability are reduced
Solution Approach 1:
The lens side wall is segmented into an attached first part and an unattached second part. The first part maintains precise installation by being fixed to the lens barrel, while the second part creates the necessary gap for blocking stray light. This segmentation allows the system to simultaneously achieve both precise installation and effective stray light blocking.
3Object-affected harmful factors
If the non-attached part size is increased to block more stray light, then imaging quality is improved, but the lens installation stability is reduced
Solution Approach 1:
The lens side wall structure implements local quality differentiation where the first part (attached portion) ensures mechanical stability through secure attachment to the lens barrel, while the second part (unattached portion) provides optical function by blocking stray light. By carefully designing the boundaries and dimensions of these parts, the invention achieves optimal balance between installation stability and stray light blocking effectiveness.
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
This design significantly reduces stray light entering the imaging surface receptor, thereby improving imaging quality by effectively managing stray light reflections and maintaining precise lens installation.
Implementation Method 1
a gap is formed between another part and the first inner wall 1021, in which, a part in which the side wall 201 of the lens 20 is attached to the first inner wall 1021 of the lens barrel 10 is an attached part 2011, and a part forming the gap between the side wall 201 of the lens 20 and the first inner wall 1021 of the lens barrel 10 is a non-attached part 2012
Data Source
AI summary
The present disclosure provides a lens module. The lens module includes a lens barrel including a first barrel wall forming an optical aperture and a second barrel bending and extending from the first barrel wall. The second barrel wall includes a first inner wall and a first outer wall opposite to the first inner wall. One lens is arranged in the lens barrel, and the lens includes a side wall connecting an object side and an image side, a part of the side wall from the lens attaching to the first inner wall. A gap is formed between another part of the side wall and the first inner wall. A size of the part forming the gap between the side wall and the first inner wall along a direction of an optical axis accounts for at least one second of a total height.