Imaging Lens Corner Geometry to Prevent Peeling Stress
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Solution Overview
Problem
In imaging apparatuses, the concentration of contraction stresses at angled sections of lenses can lead to peeling issues, particularly at the four corners, causing the lens to detach.
Innovation Solution
The design incorporates a solid-state imaging element with a glass substrate and a lens where the four corners of the lens are modified to have angles greater than 90 degrees, reducing peeling stresses and preventing lens detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the lowermost-layer lens is configured on the solid-state imaging element to reduce size, then the camera size is reduced, but contraction stresses are concentrated at angled sections causing the lens to peel off
Solution Approach 1:
The patent applies curvature by replacing the conventional rectangular lens shape with a substantially circular lens shape. This curved geometry eliminates the angled corner sections that concentrate contraction stresses, thereby preventing lens peeling while maintaining the reduced camera size achieved by positioning the lens on the solid-state imaging element
2Ease of manufacture
If conventional rectangular lens shape is used, then manufacturing is simple, but peeling stresses concentrate at angled corners causing detachment
Solution Approach 1:
The patent replaces the rectangular lens shape with a substantially circular shape, eliminating the four corners that serve as stress concentration points. This curved geometry distribution prevents peeling stresses from concentrating at specific locations, thereby improving lens attachment reliability while remaining manufacturable
Solution Approach 2:
The patent modifies the lens shape locally by eliminating corner sections and creating a uniform curved perimeter. This local geometric modification redistributes the stress field across the lens boundary, preventing stress concentration at corners while maintaining overall lens functionality
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 configuration effectively minimizes peeling stresses and ensures the lens remains securely attached, enhancing the durability and reliability of the imaging apparatus.
Implementation Method 1
a solid-state imaging element that generates a pixel signal by photoelectric conversion according to a light amount of incident light
Data Source
AI summary
The present disclosure relates to an imaging apparatus and electronic equipment that make it possible to reduce peeling stresses at angled sections included in the four corners of a lens, and prevent the lens from being peeled off. An imaging apparatus includes a solid-state imaging element that generates a pixel signal by photoelectric conversion according to a light amount of incident light, a glass substrate provided on the solid-state imaging element, and a lens provided on the glass substrate, in which four corners of the lens that is substantially rectangular when seen in a plan view do not have angles equal to or smaller than 90°. The present technology may be applied to an imaging apparatus and the like, for example.