Camera Lens Barrier for Flash Crosstalk Reduction
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Solution Overview
Problem
Light emitted by camera flashes can cause interference with the image sensor, leading to reduced image quality due to crosstalk, especially when there is a clear path between the flash and the image sensor.
Innovation Solution
A lens with a barrier is used to mitigate this interference by positioning a metal or plastic barrier between the flash and image sensor portions, preventing light from passing through and interfering with the image sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a clear path is provided between flash and image sensor, then flash illumination effectiveness is improved, but image quality deteriorates due to crosstalk
Solution Approach 1:
The lens is divided into multiple sections: a first lens section covering the flash, a second lens section covering the image sensor, and a barrier section between them. This segmentation allows the flash light to pass through the first section while the barrier blocks direct light paths to the image sensor, preventing crosstalk while maintaining illumination effectiveness.
Solution Approach 2:
A barrier section made of light-blocking material is introduced as an intermediary element between the flash and image sensor. This barrier selectively blocks direct light paths from the flash to the image sensor while allowing light to pass through the lens sections, thus preventing crosstalk without compromising the flash's illumination function.
2Object-affected harmful factors
If a barrier is added to the lens, then crosstalk is reduced, but device complexity increases
Solution Approach 1:
The barrier section is merged with the lens structure to form an integrated assembly. The barrier and lens sections are positioned relative to each other and can be manufactured as a single piece or pre-assembled unit, reducing the need for separate components and simplifying the overall device structure while still providing effective crosstalk prevention.
Solution Approach 2:
The barrier section serves multiple functions: it blocks direct light paths from the flash to the image sensor (preventing crosstalk), maintains the structural integrity of the lens assembly, and can be integrated with mounting features for securing the lens to the camera housing. This multi-functionality reduces the need for additional separate components.
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 barrier effectively reduces crosstalk, improving image quality by blocking unwanted light from the flash, thereby enhancing the performance of camera systems in devices with integrated flashes and image sensors.
Implementation Method 1
a barrier between the image sensor portion and the flash portion
Data Source
AI summary
A lens for a camera that has a flash and an image sensor is disclosed. The lens includes a transparent portion including a flash portion for covering the flash and an image sensor portion for covering the image sensor. The lens also includes a barrier positioned between the image sensor portion and the flash portion. The barrier has a top portion and a lower portion, the lower portion defining a plurality of securing holes such that lens material passes through at least some of the securing holes to secure the barrier to the transparent portion.