Image Reading Optics With Integrated Light Limiting for Stray Light
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical devices struggle to effectively manage and improve images based on reflection light without appropriate light limiting mechanisms, leading to issues such as stray light entry and reduced optical performance.
Innovation Solution
Incorporating a light limiting portion that extends in the array direction on the incident side of reflection light, supported by a first support body, and a second support body that is movable in the optical axis direction to manage the incidence of light on lenses, enhancing image quality by limiting stray light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If no light limiting portion is provided, then the device structure is simpler, but stray light enters the lenses and degrades image quality
Solution Approach 1:
A light limiting portion is introduced as an intermediary component between the radiation portion and the lens body. This light limiting portion selectively blocks stray light while allowing useful light to pass through, thereby improving image quality without fundamentally changing the overall device architecture.
Solution Approach 2:
The light limiting portion is positioned at a specific location where it can effectively block stray light paths while maintaining optical performance. By applying light limitation only where needed rather than throughout the entire optical path, the solution addresses the harmful effect with minimal additional complexity.
2Manufacturing precision
If a light limiting portion is added, then image quality improves by reducing stray light, but the device complexity increases
Solution Approach 1:
The light limiting portion is integrated with the first support body, combining two functions into a single component. This merging approach reduces the number of separate parts and simplifies assembly while still achieving the light limitation function needed for improved image quality.
3Reliability
If the second support body is made movable, then optical performance is enhanced through positioning adjustment, but the device complexity increases
Solution Approach 1:
The second support body is designed to be movable relative to the first support body in the optical axis direction, allowing dynamic adjustment of the lens body position. This dynamic capability enables precise positioning for optimal optical performance while using a simple linear movement mechanism rather than complex multi-axis positioning.
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 improves image quality by reducing stray light entry and enhancing optical performance, particularly in image reading devices, by effectively managing reflection light through the use of movable support bodies and light limiting structures.
Implementation Method 1
a radiation portion that sends light toward a predetermined position
Implementation Method 2
a lens body including plural lenses that are arranged in an array direction and on which reflection light reflected at the predetermined position is incident
Implementation Method 3
the light limiting portion limiting incidence of at least a portion of light having an influence on an image based on reflection light
Data Source
AI summary
An optical device includes: a radiation portion that sends light toward a predetermined position; a lens body including plural lenses that are arranged in an array direction and on which reflection light reflected at the predetermined position is incident; a first support body having a light limiting portion and supporting the radiation portion, the light limiting portion extending in the array direction on the incident side of reflection light relative to the lens body, the light limiting portion limiting incidence of at least a portion of light having an influence on an image based on reflection light; and a second support body supporting the lens body and being movable, relative to the first support body, in an optical axis direction of reflection light.