Optical Sensor Louver Film for Simultaneous Multi-Wavelength Sensing
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Solution Overview
Problem
Existing optical sensors require a long time to acquire multiple types of information due to sequential irradiation with light of different wavelength bands.
Innovation Solution
An optical sensor design with a light receiving part and a louver part comprising laminated layers with alternating transmissive and light shielding portions that selectively transmit specific wavelength bands, allowing simultaneous acquisition of information from multiple wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If light of a plurality of wavelength bands is sequentially irradiated onto the measuring object, then a plurality of types of information can be acquired, but the acquisition time becomes long
Solution Approach 1:
The light receiving part is divided into multiple pixel groups, where each pixel group is assigned to receive light of a specific wavelength band. This spatial segmentation allows simultaneous acquisition of multiple wavelength information without sequential irradiation, thereby reducing acquisition time while maintaining complete information collection
Solution Approach 2:
The patent introduces a spatial dimension solution by arranging different wavelength-selective optical paths in different spatial locations. Instead of using time-sequential irradiation, the system uses spatially separated pixels with different wavelength characteristics to receive multiple wavelength bands simultaneously, converting a time-based problem into a space-based solution
2Speed
If a collimator is used to extract parallel light from scattered light, then light directionality is improved, but device complexity increases
Solution Approach 1:
Instead of using a uniform collimator structure throughout the optical system, the patent applies wavelength-selective properties locally at each pixel or pixel group. Each pixel is equipped with optical path elements tailored to its specific wavelength band, allowing parallel light extraction without requiring a complex universal collimator for the entire sensor array
Solution Approach 2:
The optical path elements are designed to perform multiple functions: wavelength selection, light direction control, and parallel light extraction. By integrating these functions into compact structures at each pixel level, the system achieves effective light extraction without adding significant device complexity
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
Enables the rapid acquisition of multiple types of information by reducing the time required for data collection.
Implementation Method 1
a first wavelength selecting unit that transmits light of a first wavelength band and a second wavelength selecting unit that transmits light of a second wavelength band
Implementation Method 2
a transmissive portion that transmits light of a predetermined wavelength band and a light shielding portion that shields light
Implementation Method 3
a light shielding portion that shields light
Implementation Method 4
a light receiving part including a plurality of pixels and receiving light from a measuring object
Data Source
AI summary
An optical sensor includes a light receiving part including a plurality of pixels and receiving light from a measuring object, the pixels being disposed in a matrix along a first direction and a second direction, and a louver film in which a first layer and a second layer are laminated, the first layer including a transmissive portion that transmits light of a predetermined wavelength band and a light shielding portion that spiels light, the transmissive portion and the light shielding portion being alternately disposed along the first direction, the second layer including the transmissive portion and the light shielding portion that are alternately disposed along the second direction. The transmissive portion included in one of the first layer and the second layer includes a first wavelength selecting unit that transmits light of a first wavelength band and a second wavelength selecting unit that transmits light of a second wavelength band.