Biometric Sensor Enclosure With Anti-Reflection Transparent Surface

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Solution Overview

Problem

Conventional biometric sensor holders fail to protect sensors from tampering, theft, wear and tear, moisture, dust, and liquid spills while maintaining accuracy, leading to high false rejection and acceptance rates due to reflective materials like glass affecting the path of electromagnetic rays.

Innovation Solution

A cabinet-based enclosure with a primary surface for securing the biometric sensor and a secondary, transparent surface allowing electromagnetic rays to pass through, positioned at a predefined angle or with a curved shape to prevent reflections and hindrances, combined with coatings to absorb unwanted illuminations, and a locking mechanism for security.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional holder is used to support the biometric sensor, then the sensor is accessible and functional, but the sensor is vulnerable to tampering, theft, wear and tear, moisture, dust, and liquid spills

Engineering Contradiction:

Improvesensor protectionVSAvoidenclosure structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The biometric sensor is nested within a holder, which is in turn nested within an enclosed cabinet structure. This multi-layer nesting provides progressive protection while maintaining the sensor's functionality through the transparent secondary surface.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The secondary surface is made of a transparent material that acts as a protective shell, allowing electromagnetic rays to pass through while providing physical protection against environmental threats and tampering.

Inventive Principle:

Principle #30Flexible shells and thin films

2Reliability

If glass or reflective materials are used in the enclosure, then the sensor is protected, but the reflective surfaces affect the path of electromagnetic rays and increase false rejection and acceptance rates

Engineering Contradiction:

Improvesensor protectionVSAvoidbiometric data accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

Different surfaces of the enclosure have different properties: the secondary surface is transparent to allow electromagnetic ray passage, while other surfaces may be reflective or absorptive. This localized differentiation optimizes both protection and measurement accuracy.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The enclosure converts potentially harmful reflective surfaces into beneficial anti-reflective treatments or strategic positioning, where any reflections are directed away from the sensor path, turning a source of error into a non-interfering element.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Measurement precision

If the secondary surface is positioned at a predefined angle or curved shape, then reflections are prevented, but the manufacturing complexity increases

Engineering Contradiction:

Improveelectromagnetic ray transmissionVSAvoidsurface positioning

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The secondary surface can be manufactured with a curved or spheroidal shape, which naturally disperses reflections and prevents them from returning to the sensor, improving measurement precision while using standard manufacturing techniques.

Inventive Principle:

Principle #14Spheroidality (Curvature)

4Measurement precision

If coatings are added to absorb unwanted illuminations, then the biometric data capture accuracy improves, but the manufacturing process becomes more complex

Engineering Contradiction:

Improvebiometric data captureVSAvoidcoating application

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The surfaces are treated with anti-reflective coatings that change the optical parameters of the material, reducing reflections and improving electromagnetic ray transmission. These coatings can be applied through standard industrial processes.

Inventive Principle:

Principle #35Parameter changes

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 enclosure effectively secures biometric sensors from environmental threats and tampering while maintaining accurate biometric data capture, reducing false rejection and acceptance rates to levels comparable to unprotected sensors.

Implementation Method 1

The secondary surface is substantially transparent to the electromagnetic rays emitted by the biometric sensor

Methodology Applied

Scientific EffectElectromagnetic radiation transmission: Electromagnetic Induction

Implementation Method 2

positioned at a predefined angle or with a curved shape to prevent reflections and hindrances

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS9486074B2Enclosure for biometric sensor

Publication Date: 2016.11.08 TATA CONSULTANCY SERVICES LTD

AI summary

An enclosure for a biometric sensor is described. The enclosure comprises a cabinet having a plurality of surfaces. The biometric sensor placed inside the cabinet on a holder fixed on a primary surface from amongst the plurality of the surfaces. A secondary surface from amongst the plurality of surfaces is opposite to the primary surface. The secondary surface is substantially transparent to electromagnetic rays emitted by the biometric sensor.