Camera Shutter with Infrared Pass Filter for Security
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Solution Overview
Problem
Portable information handling systems face challenges in physical security, as users often cover the camera to prevent unauthorized access, which disrupts facial recognition functionality.
Innovation Solution
A shutter mechanism with an infrared pass filter is integrated into the camera, allowing it to capture images during facial recognition while blocking visible light, ensuring physical security without disabling facial recognition capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the camera is covered with a shutter to prevent unauthorized access, then physical security is improved, but facial recognition functionality is lost
Solution Approach 1:
The shutter is designed with selective optical properties: it blocks visible light to prevent unauthorized camera access while simultaneously transmitting infrared light to enable facial recognition. This local quality differentiation allows the same shutter material to serve dual purposes - security and functionality.
Solution Approach 2:
The shutter serves multiple functions: it acts as a physical security barrier against unauthorized visual access, while also functioning as an infrared transmission window for facial recognition. This multi-functionality resolves the contradiction by making the security component itself enable the facial recognition feature.
2Object-affected harmful factors
If the shutter blocks all light to provide security, then unauthorized image capture is prevented, but infrared light for facial recognition is also blocked
Solution Approach 1:
The shutter material exhibits wavelength-dependent optical properties, blocking visible light wavelengths while transmitting infrared wavelengths. This selective permeability based on local quality (wavelength-specific properties) allows the shutter to filter harmful visible light access while permitting beneficial infrared light for facial recognition.
Solution Approach 2:
The shutter's optical transmission parameters are specifically engineered to change based on wavelength - high absorption in the visible spectrum and high transmission in the infrared spectrum. This parameter differentiation enables the shutter to provide security for visible light while maintaining facial recognition capability through infrared light.
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 shutter provides secure camera operation by preventing unauthorized visual image capture while maintaining facial recognition functionality, ensuring secure access to the information handling system.
Implementation Method 1
The shutter integrates a pass filter for a predetermined light spectrum, such as an infrared spectrum, to pass light through to the camera lens when blocked by the shutter
Data Source
AI summary
An information handling system camera is secured against unauthorized image captures by a shutter that mechanically closes across the camera lens to block visible light from entering the camera. The shutter integrates an infrared bypass filter that passes through infrared light while blocking visible light so that the camera can support facial recognition when the mechanical shutter secures the camera to prevent unauthorized capture of visual images.