Camera Module Polarization Filtering for Reflection Ghosting
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Solution Overview
Problem
Camera modules in transportation devices and light-emitting receiving systems face issues with pseudomorphism and imaging errors due to strong light reflections, such as vehicle headlights, which can lead to safety concerns and reduced imaging quality.
Innovation Solution
A camera module design incorporating an imaging lens assembly, image sensor, plate element, and polarizing element, where the plate element is inclined to the optical axis and a polarizing element is placed on the image side to filter specific polarized light reflections, preventing pseudomorphism and enhancing imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the plate element is inclined to the optical axis to address safety and aerodynamic concerns, then the safety and air resistance are improved, but pseudomorphism and imaging errors occur due to multiple light reflections
Solution Approach 1:
A polarizing element is introduced as an intermediary component between the plate element and the imaging lens assembly. This polarizing element selectively filters polarized light reflections from the inclined plate element, allowing the plate to maintain its safety-critical inclination while preventing pseudomorphism in the captured images.
Solution Approach 2:
The solution changes the optical parameters of the light reflections by using a polarizing element with specific polarization characteristics. By filtering light based on its polarization state, the system maintains the mechanical inclination of the plate element while altering the optical properties of reflected light to eliminate imaging errors.
2Loss of energy
If the plate element is inclined to the optical axis, then the air resistance is reduced, but pseudomorphism is formed due to multiple reflections inside the plate element
Solution Approach 1:
The polarizing element serves as an intermediary that selectively blocks polarized light reflections from the inclined plate element. This allows the plate to maintain its aerodynamic inclination while the polarizing element prevents the reflected light from reaching the imaging lens, thus eliminating pseudomorphism.
Solution Approach 2:
The solution converts the harmful polarized light reflections into a manageable parameter by using the polarization property itself as the filtering criterion. The polarizing element exploits the polarization state of reflected light to selectively block it, turning the problematic reflection into a controllable optical parameter.
3Measurement precision
If a polarizing element is added to filter polarized light reflections, then pseudomorphism is reduced, but the device complexity increases
Solution Approach 1:
The polarizing element performs multiple functions simultaneously: it filters polarized light reflections to eliminate pseudomorphism, and it can be integrated into existing camera module structures. This multi-functionality reduces the need for additional specialized components, thereby limiting the increase in device complexity.
4Measurement precision
If the polarizing element is disposed on the image side of the plate element, then specific polarity light passes through to improve imaging quality, but the device complexity increases
Solution Approach 1:
The polarizing element is merged with existing components in the camera module, such as being integrated into the lens assembly or mounted on existing structural elements. This merging approach allows the polarizing function to be added without creating entirely new structural components, thereby improving imaging quality while minimizing the increase in 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
The solution effectively reduces pseudomorphism and improves imaging quality by filtering specific polarized light reflections, ensuring the completeness and accuracy of imaging information, even under challenging light conditions.
Implementation Method 1
The polarizing element is disposed on an image side of the plate element, so that an object-side light with a specific polarity from the plate element passes through
Data Source
AI summary
A camera module includes an imaging lens assembly, an image sensor, a plate element and a polarizing element. The imaging lens assembly is configured to define an optical axis. The image sensor is disposed on an image surface of the imaging lens assembly. The plate element is farther from the image sensor than the imaging lens assembly from the image sensor on the optical axis, wherein the plate element is inclined to the optical axis. The polarizing element is disposed on an image side of the plate element, so that an object-side light with a specific polarity from the plate element passes through.