Near-Infrared Absorption Filter for 900-1000 nm Detection
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Solution Overview
Problem
Existing solid-state imaging devices for infrared detection face challenges in achieving high detectability and image quality, particularly in near-infrared wavelengths, due to limitations in near-infrared ray absorption and scattering.
Innovation Solution
An infrared sensor is developed that incorporates a near-infrared ray absorption filter with a compound having a maximum absorption wavelength between 900 nm and 1,000 nm, utilizing a specific pyrrolopyrrole compound with substituents to enhance light fastness and absorption efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional near-infrared ray absorption filter is used, then the filter can block some near-infrared rays, but the detectability and image quality in the 900 nm to 1,000 nm wavelength range are insufficient
Solution Approach 1:
The patent applies parameter changes by selecting a near-infrared ray absorption substance with a maximum absorption wavelength specifically positioned in the 900 nm to 1,000 nm range. This precise wavelength parameter selection enables the filter to effectively absorb near-infrared rays in this specific band while maintaining excellent detectability and image quality, resolving the contradiction between detectability and image quality.
2Measurement precision
If near-infrared rays are used for distance measurement or three-dimensional measurement, then measurement capability is improved, but scattering of near-infrared rays occurs due to their longer wavelength
Solution Approach 1:
The patent extracts and removes the harmful scattering effect by introducing a near-infrared ray absorption filter that selectively absorbs near-infrared rays before they can scatter. The filter captures the near-infrared radiation, preventing it from causing scattering issues while still allowing the system to utilize near-infrared wavelengths for distance and three-dimensional measurement.
3Illumination intensity
If near-infrared rays are used for photographing nocturnal subjects, then photography capability in dark environments is improved, but the subject may be irritated or noticed by the illumination
Solution Approach 1:
The patent applies local quality by using a near-infrared ray absorption filter with specific wavelength characteristics (maximum absorption at 900 nm to 1,000 nm). This localized wavelength selection enables effective nocturnal photography while the filter's specific absorption properties ensure that the near-infrared illumination does not irritate or alert nocturnal subjects, as this wavelength range is less detectable to many animals.
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 provides an infrared sensor with improved detectability and image quality by effectively filtering near-infrared rays within the specified wavelength range, suitable for applications like nocturnal wildlife photography and security imaging without disturbing the subject.
Implementation Method 1
a near-infrared ray absorption filter, in which the near-infrared ray absorption filter contains a near-infrared ray absorption substance having a maximum absorption wavelength in wavelengths of 900 nm to 1,000 nm
Data Source
AI summary
The present invention relates to an infrared sensor, a near-infrared ray absorption composition, a photosensitive resin composition, a compound, a near-infrared ray absorption filter, and an image pick-up device. Provided is an infrared sensor 100 that detects an object by detecting light in wavelengths of 900 nm to 1,000 nm, including infrared ray transmission filters 113 and near-infrared ray absorption filters 111, in which the near-infrared ray absorption filters 111 contains a near-infrared ray absorption substance having a maximum absorption wavelength in wavelengths of 900 nm to 1,000 nm.