Lens Barrel Planar-Convex Lens Insertion Alignment
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Solution Overview
Problem
Existing methods for inserting planar-convex lenses into lens barrels face challenges such as slipping or tilting due to small size and curvature, leading to poor optical performance and difficulty in secure insertion, especially with suction pads misaligning the optical axis.
Innovation Solution
A manufacturing method using a first lens holding section to protrude and contact the planar surface, and a second suction section to align and hold the convex surface, allowing for secure insertion without tilting by switching suction and aligning the lens along the optical axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If tweezers are used to hold the lens, then the lens can be grasped, but the lens may slip or tilt due to small contact area, resulting in insecure holding and difficult insertion
Solution Approach 1:
The patent uses a suction pad with vacuum suction to hold the lens instead of mechanical tweezers. The suction pad creates a vacuum pressure difference to securely grasp the lens surface, preventing slipping and tilting while maintaining reliable holding for small lenses with large curvature
2Reliability
If suction pad is used to hold the lens, then the lens can be securely held, but the optical axis and inserting direction become misaligned, causing the lens to be inserted tilted
Solution Approach 1:
The patent divides the holding function into two separate components: a suction pad for secure grasping and a guide structure for alignment. The guide structure includes guide walls and guide grooves that constrain the lens position and orientation, ensuring the optical axis aligns with the inserting direction while the suction pad maintains secure holding
Solution Approach 2:
The patent introduces a guide structure as an intermediary between the suction pad and the lens insertion process. The guide walls and guide grooves act as mediators that correct the alignment between the suction pad's holding position and the required insertion direction, preventing tilted insertion while maintaining secure holding
3Ease of manufacture
If the lens is dropped to fall freely for insertion, then the insertion process is simple, but the lens may rotate and turn sideways or upside down due to center of gravity movement, resulting in incorrect orientation
Solution Approach 1:
The patent performs preliminary alignment actions before lens insertion by using the guide structure to pre-position and pre-orient the lens. The guide walls and guide grooves establish the correct orientation and position in advance, preventing rotation and ensuring the convex surface faces the correct direction before insertion is completed
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
Ensures secure and accurate insertion of planar-convex lenses into barrel frames without tilting, improving optical performance and manufacturing efficiency.
Implementation Method 1
a second lens holding section which can suck the convex surface section of the planar-convex lens
Data Source
AI summary
A manufacturing method of a lens barrel is disclosed. According to one implementation, the manufacturing method includes the following steps. A first lens holding section protrusion step inserts a first lens holding section from one end of a barrel frame to a hollow section to protrude from the other end. A second lens holding section suction step sucks a convex surface section. A first lens holding section contact step brings the planar surface section into contact with the first lens holding section. A lens holding switching step releases suction of the convex surface section, and the planar surface section is held by the first lens holding section. A barrel frame contact step moves the first lens holding section or the lens barrel so that a surrounding edge section is brought into contact with a lens receiving section.