Thin Lens Module Joints Repositioned for Reduced Thickness
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Solution Overview
Problem
Conventional prism type lens modules have a thick structure due to exposed joints for signal input and output, which hinder the reduction of thickness and weight, limiting the portability of image capture devices.
Innovation Solution
A thin lens module design with a case having a first and second optical axis section, where focusing and zooming lens groups reciprocate within the case, and position indicators and driving devices are integrated to control lens movements, with joints positioned parallel to the optical axis to minimize thickness, and a shutter mechanism to control light entry, all housed within a compact case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If joints for signal input and output are provided on the side perpendicular to the optical axis, then signal transmission is enabled, but the total thickness of the lens module increases
Solution Approach 1:
The patent repositions the joints from the side perpendicular to the optical axis to the side parallel to the optical axis (the thickness direction). This dimensional change allows signal transmission without increasing the thickness in the optical path direction, as the joints now extend along the thickness axis rather than adding to it.
Solution Approach 2:
Instead of placing joints on the conventional side (perpendicular to optical axis), the patent inverts the arrangement by placing them on the opposite side (parallel to optical axis). This inversion resolves the contradiction by changing the orientation of signal transmission interfaces to align with the thickness direction.
2Adaptability or versatility
If multiple joints are provided for focusing, zooming, and shutter control, then comprehensive control functions are achieved, but the thickness and weight of the image capture device increase
Solution Approach 1:
The patent integrates multiple control functions (focusing, zooming, shutter control) into a unified joint arrangement on the side parallel to the optical axis. This multi-functional design allows comprehensive control capabilities to be achieved without proportionally increasing thickness, as all joints share the same repositioned location rather than requiring separate extensions for each function.
3Measurement precision
If lens groups are moved in a straight optical axis for focusing, then focusing precision is improved, but the structure requires extended length outside the device
Solution Approach 1:
The patent employs a prism type lens structure where lens groups are nested within the device housing and moved along a straight optical axis without extending outside the device. The optical path is folded using prisms, allowing the lens groups to reciprocate internally while maintaining precise focusing capability, effectively nesting the focusing mechanism within the device boundaries.
Data Source
AI summary
A thin lens module has a case, in which an optical lens set, an image sensor, a focusing driving device, two position indicators, a zooming driving device, a shutter, and a shutter driving device are provided. An optical axis of the optical lens set has a first optical axis section and a second optical axis section, and the first optical axis section is perpendicular to an object side. The focusing driving device, the position indicators, and the shutter driving device respectively connects to joints for signal transmission, and these joints are provided on a side of the case parallel to the first optical axis section to achieve the thinning purpose.