Condensing Unit Optical Axis Deviation for Image Quality
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Solution Overview
Problem
Conventional image detecting apparatuses suffer from reduced imaging quality due to significant optical path differences in the light rays between the working surface and the sensing unit, leading to distorted images.
Innovation Solution
The image detecting apparatus includes a condensing unit with an optical axis deviated from the main optical axis of the reflected light beam to minimize optical path differences, utilizing a lens or lenses between the sensing unit and the working surface, thereby improving focus and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the optical axis of the lens overlaps with the optical axis of the light beam in the conventional sensing system, then the structure is simple and easy to align, but the optical path differences of light rays between the working surface and the sensing unit are significantly different, causing reduced imaging quality
Solution Approach 1:
The patent applies asymmetry by deliberately deviating the optical axis of the condensing unit from the main optical axis of the reflected light beam. This asymmetric configuration allows different light rays (such as main light rays 113b, 113c) to have more equalized optical path lengths from the working surface to the sensing unit, thereby improving imaging quality while maintaining reasonable structural complexity
Solution Approach 2:
The patent changes the positional parameter of the condensing unit's optical axis relative to the reflected light beam's main optical axis. By adjusting this positional parameter (deviating it from coincidence), the optical path differences are reduced, which directly improves the imaging quality without significantly complicating the overall device structure
2Ease of operation
If the conventional sensing system uses a lens with overlapping optical axes, then the alignment is straightforward, but the light beam cannot be exactly focused on the sensing unit, resulting in distortion and reduced imaging quality
Solution Approach 1:
The patent employs asymmetry by positioning the condensing unit's optical axis at a deviation from the reflected light beam's main optical axis. This asymmetric arrangement enables exact focusing of the light beam on the sensing unit by equalizing the optical paths, thereby achieving high focusing precision while keeping the alignment process relatively straightforward
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
This configuration ensures precise focusing of the light beam on the sensing unit, eliminating distortion and enhancing imaging quality compared to conventional systems.
Implementation Method 1
The condensing unit is disposed between the sensing unit and the working surface, wherein an optical axis of the condensing unit is deviated from a main optical axis of the reflected light beam
Implementation Method 2
the lens 124 is disposed between the sensing unit 122 and the working surface 50 for focusing the light beam 113 on the sensing unit 122
Data Source
AI summary
An image detecting apparatus includes an illumination system and a sensing system. The illumination system is for providing a light beam to a working surface to generate a reflected light beam by the working surface. The sensing system includes a sensing unit and a condensing unit. The sensing unit is disposed on a transmission path of the reflected light beam reflected by the working surface for receiving the reflected light beam. The condensing unit is disposed between the sensing unit and the working surface, wherein an optical axis of the condensing unit is deviated from a main optical axis of the reflected light beam.