Lens Barrel Conical Protrusions Strength Light Scattering
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Solution Overview
Problem
Conventional lens barrels with fine convexo-concave portions on their inner surfaces are prone to damage and have low strength, making them difficult to handle during assembly.
Innovation Solution
A lens barrel design featuring a housing and inner member with conical protrusions aligned at a pitch of 0.1 mm to 2.0 mm, enhancing strength and reducing the risk of damage while maintaining effective light scattering performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If fine convexo-concave portions with pitch of less than or equal to light wavelength are formed on the inner surface of the lens barrel, then light scattering performance is improved, but the surface shape has low strength and is easily damaged or broken
Solution Approach 1:
The patent changes the pitch parameter of the convexo-concave portions from less than or equal to light wavelength to greater than light wavelength (specifically 0.1 mm to 2.0 mm). This parameter change maintains the light scattering function while significantly improving the mechanical strength and durability of the surface shape, resolving the contradiction between optical performance and structural strength.
2Object-affected harmful factors
If fine convexo-concave portions with pitch of less than or equal to light wavelength are formed on the inner surface of the lens barrel, then light scattering performance is improved, but difficulty in handling arises during the assembling process
Solution Approach 1:
By increasing the pitch of the convexo-concave portions from sub-wavelength scale to visible scale (0.1 mm to 2.0 mm), the surface features become larger and more robust, making them easier to handle during assembly operations while preserving effective light scattering performance for reducing flare and ghost effects.
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 design provides a lens barrel with enhanced strength and reduced thickness, inhibiting flare and ghost effects, and is easier to manufacture and assemble, while maintaining effective light scattering performance.
Implementation Method 1
a surface shape for scattering incident light
Data Source
AI summary
A lens holding frame includes a plurality of conical protrusions. The plural conical protrusions include a pitch of greater than or equal to 0.1 mm and less than or equal to 2.0 mm.