Optical Detection Device with Planar Shutter for Noise Filtering
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Solution Overview
Problem
Existing detection devices suffer from reduced accuracy due to unwanted noise light affecting the captured images of objects, leading to blurred or hazy images.
Innovation Solution
A detection device incorporating a planar shutter device, a light-transmitting light guide plate, an optical sensor with photodiodes, and a light source configured to emit light to the side surface of the light guide plate, which includes optical filters and scatterers to enhance image clarity and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional optical sensor is used without noise filtering, then the device structure remains simple, but the detection accuracy deteriorates due to noise light causing blurred images
Solution Approach 1:
A light guide plate is introduced as an intermediary component between the light source and the optical sensor. The light guide plate guides light from the light source to illuminate the culture vessel from the bottom, while also serving as a structural element that can be integrated with the sensor assembly. This intermediary structure enables improved light control and noise reduction without requiring complete redesign of the entire detection system.
Solution Approach 2:
The patent integrates multiple components into a nested configuration where the culture vessel is positioned on the optical sensor, the light guide plate is disposed between the light source and the culture vessel, and the planar shutter device is integrated within the sensor assembly. This nesting approach allows multiple functions (illumination, detection, and noise filtering) to be combined in a compact structure, improving detection accuracy without proportionally increasing device complexity.
2Measurement precision
If a planar shutter device is added to filter noise light, then detection accuracy improves, but the device complexity increases
Solution Approach 1:
The patent replaces traditional mechanical optical filters or complex lens systems with a planar shutter device that uses liquid crystal technology. This planar shutter can electronically control light transmission without moving parts, providing noise filtering capability while maintaining a compact, integrated structure. The substitution of mechanical optical systems with electronic control reduces overall device complexity while improving image clarity.
Solution Approach 2:
The planar shutter device changes the transmittance parameter of light dynamically, allowing it to filter noise light while transmitting useful light signals. By controlling the liquid crystal state, the shutter can adjust its light transmission properties to improve image clarity. This parameter-based control provides a flexible solution that improves detection accuracy without requiring multiple fixed optical components.
3Measurement precision
If light is emitted directly to the culture vessel, then the illumination is simple, but noise light enters the sensor causing blurred images
Solution Approach 1:
The patent illuminates the culture vessel from the bottom through the light guide plate rather than from the top or side. This dimensional change in the optical path allows light to pass through the culture medium and excite fluorescence from within, while the planar shutter device positioned at the sensor plane can effectively filter noise light entering from the top. This dimensional approach improves signal-to-noise ratio by separating the illumination path from the detection path.
Solution Approach 2:
The light guide plate serves as an intermediary that directs light from the light source to illuminate the culture vessel from the bottom, while the planar shutter device acts as an intermediary filter between the culture vessel and the optical sensor. This dual-intermediary approach controls both the illumination and detection paths, improving signal-to-noise ratio by ensuring that only useful light signals reach the sensor while noise light is filtered out.
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 device achieves higher detection accuracy by capturing differential image data, reducing blurring, and improving image quality through the use of optical filters and scatterers, resulting in clearer object detection.
Implementation Method 1
a light-transmitting light guide plate that overlaps one side of the planar shutter device in a first direction
Implementation Method 2
an optical sensor that overlaps one side of the light guide plate in the first direction and comprises a plurality of photodiodes arranged in a plane
Implementation Method 3
a planar shutter device capable of changing transmittance of light
Data Source
AI summary
According to an aspect, a detection device includes: a planar shutter device capable of changing transmittance of light; a light-transmitting light guide plate that overlaps one side of the planar shutter device in a first direction; an optical sensor that overlaps one side of the light guide plate in the first direction and comprises a plurality of photodiodes arranged in a plane; and a light source that is disposed adjacent to the light guide plate in a second direction intersecting the first direction and is configured to emit light to a side surface of the light guide plate.