Optical Detecting Device Light Tight Component Isolation
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Solution Overview
Problem
Conventional optical detecting modules suffer from light leakage due to low quality optical isolation, leading to decreased detection accuracy as the detecting signal is directly transmitted to the light receiving unit without reflection by an external object, causing noise and intermixing of signals.
Innovation Solution
An optical detecting device with a package structure that includes an isolation component between the light source and the optical detecting component, a light tight component to prevent direct signal transmission, and a package structure with lateral walls and transparent glue to obstruct signal leakage, ensuring the signal is only reflected from an external object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the light source and optical detecting component are disposed close to each other to reduce device size, then the device compactness is improved, but light leakage occurs causing detection accuracy to deteriorate
Solution Approach 1:
The patent divides the optical path into separate regions using isolation components. The light source and optical detecting component are segmented into distinct optical zones with isolation walls and light tight components preventing direct light transmission between them, thereby maintaining detection accuracy while allowing close proximity arrangement.
Solution Approach 2:
Isolation components including isolation walls, light tight components, and transparent glue are introduced as intermediary elements between the light source and optical detecting component. These intermediaries block direct light transmission while allowing the components to be disposed close together, resolving the contradiction between compactness and detection accuracy.
2Device complexity
If optical isolation quality is low to simplify structure, then manufacturing complexity is reduced, but light leakage increases causing signal noise to worsen
Solution Approach 1:
The optical path is segmented into isolated regions using multiple isolation components (isolation walls, light tight components, transparent glue). This segmentation approach effectively blocks light leakage and reduces signal noise while maintaining relatively simple individual component structures.
Solution Approach 2:
Multiple intermediary isolation components are introduced to block direct light transmission. The isolation walls, light tight components, and transparent glue work together as intermediaries to prevent light leakage, reducing signal noise without requiring complex optical systems.
3Device complexity
If no isolation component is placed between light source and detecting component to reduce parts count, then device complexity is reduced, but light leakage occurs causing detection accuracy to deteriorate
Solution Approach 1:
The patent implements optical path segmentation using isolation walls and light tight components that divide the space between light source and detecting component into isolated regions. This segmentation prevents light leakage effectively while using simple, easy-to-manufacture components.
Solution Approach 2:
Isolation components serve as intermediary elements that block direct light transmission between the light source and optical detecting component. These intermediaries are simple in structure but effective in preventing light leakage, thereby maintaining detection accuracy without requiring complex optical systems.
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
Effectively prevents light leakage, enhancing detection accuracy by ensuring the sampling signal is only reflected from the external object and not directly transmitted to the optical detecting component, thereby improving the overall quality of the optical detecting module.
Implementation Method 1
The light source is adapted to output a sampling signal for projecting onto an external object
Implementation Method 2
The optical detecting component is adapted to receive the sampling signal reflected from the external object
Implementation Method 3
The light tight component is disposed on the isolation component and adapted to avoid the sampling signal from projecting onto the incident surface unit without reflection by the external object
Data Source
AI summary
An optical detecting device includes a light source, an optical detecting component, a package structure and a light tight component. The light source outputs a sampling signal to project onto an external object. The optical detecting component is disposed by the light source and has an interval relative to the light source. The optical detecting component receives the sampling signal reflected from the external object. The package structure covers the optical detecting component and the light source, and includes an illuminating surface unit and an incident surface unit respectively corresponding to the light source and the optical detecting component, and further includes an isolation component disposed between the illuminating surface unit and the emerging surface unit. The light tight component is disposed on the isolation component to obstruct transmission path of the sampling signal from the illuminating surface unit to the incident surface without reflection by the external object.