Vehicle Glass Insert for Uniform Far-Infrared Camera Transmission
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Solution Overview
Problem
The transmittance of infrared rays through vehicle glass is non-uniform due to inclinations, leading to decreased detection accuracy of infrared cameras, which requires a solution to maintain detection precision.
Innovation Solution
A vehicle glass design with a light shielding region incorporating a far-infrared ray transmitting region, featuring an opening with a far-infrared ray transmitting member, where the average transmittance of far-infrared rays at different positions is optimized to ensure consistent detection accuracy, even when the glass is mounted at an angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a far-infrared camera is installed inside the vehicle compartment, then the structure is simplified and cost is reduced, but the detection accuracy deteriorates due to low transmittance of ordinary window glass for far-infrared rays
Solution Approach 1:
The vehicle glass is designed with a light shielding region that contains a through-hole filled with a far-infrared ray transmitting member. This local modification allows far-infrared rays to pass through the glass at the sensor location while maintaining the light shielding function in other regions, thereby enabling the camera to be installed inside the compartment without compromising detection accuracy.
Solution Approach 2:
A far-infrared ray transmitting member is introduced as an intermediary substance to fill the through-hole in the vehicle glass. This member has high transmittance for far-infrared rays, acting as a mediator that allows infrared radiation to pass through the glass barrier to reach the camera sensor positioned inside the compartment.
2Adaptability or versatility
If the vehicle glass is mounted at an inclination, then the mounting flexibility is improved, but the transmittance uniformity deteriorates causing non-uniform infrared ray transmission
Solution Approach 1:
The far-infrared ray transmitting member is designed with a transmittance distribution that varies according to the position, specifically having higher transmittance at regions corresponding to lower positions on the inclined glass. This parameter variation compensates for the path length differences caused by inclination, maintaining uniform transmittance across the entire glass surface despite the angled mounting.
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 design effectively suppresses the decrease in infrared detection accuracy by ensuring uniform transmittance and intensity of far-infrared rays across the glass surface, enhancing the performance of infrared cameras.
Implementation Method 1
a far-infrared ray transmitting region, the far-infrared ray transmitting region including an opening and a far-infrared ray transmitting member disposed in the opening
Data Source
AI summary
A decrease in the detection accuracy of infrared rays is suppressed. Vehicle glass includes a light shielding region in which a far-infrared ray transmitting region is formed, the far-infrared ray transmitting region including an opening and a far-infrared ray transmitting member (20) disposed in the opening. In the far-infrared ray transmitting member (20), the average transmittance of far-infrared rays having wavelengths of 8 μm to 13 μm at a first position (P1) in a case where the far-infrared rays are emitted in a direction perpendicular to a surface (20a) on a vehicle exterior side is different from the average transmittance of the far-infrared rays having wavelengths of 8 μm to 13 μm at a second position (P2) that is lower than the first position (P1) in the vertical direction in a case where the vehicle glass is mounted to a vehicle.