Light Blocking Unit for Optical Device Image Quality
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Solution Overview
Problem
Existing optical devices face challenges in achieving better image quality due to unblocked light from the light guiding unit, which leads to issues like fading or blurring of characters in detected images.
Innovation Solution
An optical device is designed with a light blocking unit that includes a light blocking member positioned closer to the detection unit than an imaginary line connecting the light emitting aperture and the predetermined position, effectively blocking unnecessary light before it reaches the detection unit, thereby improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light from the light guiding unit is not blocked, then the detection unit receives sufficient light for detection, but the image quality deteriorates due to fading or blurring of characters
Solution Approach 1:
The light blocking unit is divided into multiple light blocking members arranged in a specific pattern, segmenting the light path to block only unnecessary light while allowing necessary light to pass through to the detection unit
Solution Approach 2:
The light blocking members are positioned at specific locations closer to the detection unit than the imaginary line, creating localized light blocking zones that selectively block stray light while preserving the main light path for high-quality image detection
2Measurement precision
If a light blocking unit is added to improve image quality, then character clarity improves, but the device complexity increases
Solution Approach 1:
The light blocking unit is integrated into the existing optical system structure, combining the light blocking function with the overall device architecture to minimize additional complexity while achieving improved image quality
Solution Approach 2:
The light blocking members act as intermediary elements between the light guiding unit and detection unit, selectively mediating light paths to block unnecessary light while maintaining the simplicity of the overall system design
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 effectively blocks unnecessary light, preventing fading and blurring, and ensures better image quality by allowing only necessary light to be reflected at the predetermined position, enhancing the image reading process.
Implementation Method 1
a light blocking unit configured to block light from the light guiding unit
Data Source
AI summary
An optical device includes a light guiding unit that emits light to be guided to a predetermined position from a light emitting aperture, a detection unit that receives light reflected at the predetermined position, and a light blocking unit that includes a light blocking member located closer than an imaginary line to the detection unit in a cross section including the predetermined position and the light guiding unit, the imaginary line connecting the predetermined position and an end of the light emitting aperture that is far from the predetermined position in an optical axis direction.