Lens Barrel Assembly With Glass Light Absorber for Stray Light
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Solution Overview
Problem
Existing lens manufacturing processes that involve coating or blackening to prevent reflected and scattered light are complex and costly, requiring high accuracy to ensure air-tight integration with the lens barrel, which complicates the manufacturing process.
Innovation Solution
A lens with a metal lens barrel and a glass light absorber positioned between the lens and the lens barrel, utilizing overlapping temperature ranges for the glass materials to ensure accurate positioning and air-tight integration without additional coating or blackening processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a coating is applied to the lens in black or blackening is performed to prevent reflected light or scattered light, then the generation of reflected light and scattered light is reduced, but the manufacturing process becomes complicated and costs increase
Solution Approach 1:
The patent extracts the light absorption function from the lens surface coating process and implements it through a separate glass light absorber component positioned between the lens and lens barrel. This eliminates the need for black coating or blackening processes on the lens itself, simplifying the manufacturing process while still preventing reflected and scattered light
Solution Approach 2:
The patent introduces a glass light absorber as an intermediary component between the lens and the lens barrel. This mediator absorbs stray light without requiring direct modification of the lens surface, thereby preventing reflected and scattered light while avoiding the complexity of coating processes
2Object-affected harmful factors
If a black coating is applied to the lens to prevent reflected light, then light absorption is improved, but additional manufacturing processes and equipment are required
Solution Approach 1:
The light absorption function is extracted from the lens manufacturing process and implemented through a separate glass light absorber component. This eliminates the need for additional coating equipment and processes, making manufacturing easier while still achieving the light absorption goal
Solution Approach 2:
The patent changes the approach from modifying the optical properties of the lens surface through coating to using a separate component with inherent light-absorbing properties. The glass light absorber is positioned to intercept stray light, achieving the same effect without altering the lens manufacturing parameters
3Object-affected harmful factors
If the lens is disposed in an air-tight manner in the lens barrel to prevent scattered light, then light absorption is improved, but high accuracy is required in the manufacturing process
Solution Approach 1:
The glass light absorber serves as an intermediary that absorbs scattered light before it can reflect off the lens barrel surfaces. This eliminates the need for air-tight integration between the lens and lens barrel, reducing the required manufacturing precision while still preventing scattered light from degrading image quality
4Object-affected harmful factors
If coating or blackening processes are introduced to the lens manufacturing, then reflected light is reduced, but the manufacturing cost increases due to additional equipment
Solution Approach 1:
The light absorption function is extracted from the lens coating process and implemented through a separate glass light absorber component. This eliminates the need for specialized coating or blackening equipment, reducing manufacturing complexity and cost while still achieving the desired reduction in reflected light
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 solution achieves high positional accuracy and reduces reflected and scattered light without additional processes, ensuring effective light absorption and minimizing stray light, thus simplifying the manufacturing process and improving optical performance.
Implementation Method 1
a glass light absorber disposed between an inner perimeter surface of the lens barrel and an outer edge of the lens in a radial direction of the lens barrel
Implementation Method 2
a first temperature range from a deformation point to a softening point of a first glass material constituting the lens and a second temperature range from a deformation point to a softening point of a second glass material constituting the light absorber overlap each other
Data Source
AI summary
A lens with a lens barrel includes a metal lens barrel, a glass lens disposed in the metal lens barrel, and a glass light absorber disposed between an inner perimeter surface of the metal lens barrel and an outer edge of the lens in a radial direction of the metal lens barrel. A first temperature range from a deformation point to a softening point of a first glass material constituting the lens and a second temperature range from a deformation point to a softening point of a second glass material constituting the light absorber overlap each other.