Vehicle Optical Sensor Correction for Refraction Errors
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Solution Overview
Problem
The accuracy of optical sensors in vehicles, such as cameras and lidar, is compromised when the propagation direction of light from outside the vehicle changes due to factors like the installation location or ambient temperature effects on light-transmissive members like windshields or cover lenses.
Innovation Solution
An optical device with a correction optical system that includes refractive optical members, such as lenses, mirrors, or prisms, to adjust the light propagation direction between the light-transmissive member and the optical sensor module, ensuring accurate detection by compensating for changes in refractive power caused by temperature variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light-transmissive member (such as windshield or cover lens) is used to protect the optical sensor module, then the optical sensor is protected from environmental damage, but the propagation direction of light changes due to refraction, causing inaccurate sensing
Solution Approach 1:
A correction optical system is introduced as an intermediary component between the light-transmissive member and the optical sensor module. This correction optical system includes optical elements (such as lenses or prisms) that actively compensate for the refraction effects caused by the light-transmissive member, thereby restoring the light propagation direction to enable accurate sensing while maintaining the protective function of the light-transmissive member
2Reliability
If the optical sensor is installed at a location requiring a light-transmissive member for protection, then environmental protection is achieved, but the propagation direction of light changes, decreasing detection accuracy
Solution Approach 1:
The correction optical system serves as a mediator that counteracts the refraction effects introduced by the light-transmissive member. By positioning this correction system between the windshield and the sensor, it actively adjusts the light path to compensate for the protective member's refraction, thereby maintaining both protection and detection accuracy
3Adaptability or versatility
If ambient temperature changes occur, then the refractive power of the light-transmissive member changes, but the optical sensor cannot compensate for this change, leading to continued inaccurate sensing
Solution Approach 1:
The correction optical system is designed to dynamically adjust its optical parameters (such as refraction angle or focal length) in response to temperature changes. This allows the system to compensate for temperature-induced variations in the refractive power of the light-transmissive member, maintaining sensing accuracy across different environmental conditions
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 optical device corrects the propagation direction of light, enhancing the accuracy of light detection and emission, thereby improving the sensing capabilities of optical sensors and reducing the risk of accidents by maintaining accurate detection of surroundings.
Implementation Method 1
a correction optical system that includes at least one optical member to refract the light that propagates between the light-transmissive member and the optical sensor module in a direction different from a direction in which the light-transmissive member refracts the light
Implementation Method 2
the at least one optical member may be deformed based on the ambient temperature change so as to compensate for the changed refractive power of the light-transmissive member
Implementation Method 3
a position of the at least one optical member may be adjusted based on the ambient temperature change so as to compensate for the changed refractive power of the light-transmissive member
Data Source
AI summary
An optical device for a vehicle includes an optical sensor module for detecting light that propagates through a light transmitting member; and a correction optical system that includes at least one optical member for allowing the light that propagates between the light transmitting member and the optical sensor module to be refracted in a direction different from a direction refracted by the light transmitting member.