Imaging Device Diffuser Panel Reducing Secondary Reflection Artifacts
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Solution Overview
Problem
Electromagnetic sensors reflect incident waves, leading to secondary reflections that cause artifacts such as multi-layered images or ringing due to their own radiation and housing interactions, which existing technologies like black diffusion materials fail to effectively mitigate, especially for invisible light and coded apertures.
Innovation Solution
Incorporating a diffuser panel close to the light reception surface of the image sensor to convert incident light into scattered light, expanding its diameter and reducing secondary reflections by dispersing the light before it re-enters the sensor, thereby minimizing image distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a housing with light shielding material is used to reduce EMR influence, then the image sensor is protected from external electromagnetic radiation, but secondary reflections from the sensor and housing inner walls cause artifacts such as multi-layered images and ringing
Solution Approach 1:
A diffuser panel is introduced as an intermediary component between the image sensor and the housing inner wall. This diffuser panel converts reflected light into scattered light, preventing the formation of secondary reflection artifacts while maintaining the housing's light shielding function. The diffuser panel acts as a mediator that transforms harmful reflected light into beneficial scattered light.
2Volume of moving object
If the electromagnetic sensor is positioned close to the housing for compact design, then device size is reduced, but secondary reflections from the housing inner wall re-entering the sensor cause artifacts
Solution Approach 1:
The diffuser panel serves as a mediator positioned between the sensor and housing, enabling compact design while preventing secondary reflection artifacts. It allows the sensor to be placed close to the housing without causing harmful re-reflection, as the diffuser scatters the light before it can re-enter the sensor.
Solution Approach 2:
The diffuser panel converts the harmful reflected light into beneficial scattered light. By transforming the reflected light that would cause artifacts into diffused light, the system turns a harmful effect into a useful one, enabling compact positioning without artifacts.
3Object-generated harmful factors
If existing technologies are used to reduce secondary reflections, then manufacturing costs increase or design freedom is limited, but the patent solution reduces artifacts without compromising these aspects
Solution Approach 1:
The diffuser panel is a simple intermediary component that can be easily integrated into existing housing structures. It provides an effective solution for reducing secondary reflection artifacts without requiring complex manufacturing processes or limiting design freedom, as it can be positioned between the sensor and housing in various configurations.
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 diffuser panel significantly reduces artifacts caused by secondary reflections without compromising image quality, even when reflective members are present, and is effective for both visible and invisible light, including infrared, by ensuring the scattered light does not blur the image formed on the sensor.
Implementation Method 1
a diffuser that converts incident light into scattered light whose diameter expands in accordance with a propagation distance
Implementation Method 2
a light receiver that converts light diffused by the diffuser into an electric signal
Data Source
AI summary
An artifact caused by secondary reflection is reduced. An imaging device according to an embodiment includes: a diffuser (110) that converts incident light into scattered light whose diameter is expanded in accordance with a propagation distance and outputs the scattered light; and a light receiver (132) that converts light diffused by the diffuser into an electric signal.