Opaque Splits in Transparent Media for Optical Isolation

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Solution Overview

Problem

Portable electronic devices face challenges in integrating light emitters and detectors without causing optical cross-talk, leading to false positives and noise due to undesired light pathways within the device.

Innovation Solution

The implementation of a unitary optical component within the device's housing, featuring transparent portions overlying emitters and detectors, and opaque portions between them, which defines the exterior surface and prevents internal light reflection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If light emitters and detectors are integrated in the same device housing, then device functionality is improved, but optical cross-talk and noise increase due to internal light pathways

Engineering Contradiction:

Improvedevice functionalityVSAvoidoptical cross-talk

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The housing is segmented into multiple chambers using opaque partitions and walls. The emitter is placed in a first chamber while the detector is placed in a second chamber, physically dividing the internal space to prevent direct light pathways between components.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Opaque walls and partitions act as intermediary elements between the emitter and detector. These intermediate structures block internal light pathways, preventing direct optical coupling while allowing both components to coexist in the same device housing.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If opaque barriers are added to block internal light pathways, then optical isolation is improved, but device complexity increases

Engineering Contradiction:

Improveoptical isolationVSAvoidhousing structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The opaque partitioning structures are merged with the housing itself, making the isolation features an integral part of the housing design rather than separate add-on components. This integration reduces overall device complexity while maintaining effective optical isolation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The housing structure serves multiple functions: it provides mechanical protection, defines device geometry, and simultaneously acts as the optical isolation barrier through its opaque partitioning features. This multi-functionality reduces the need for separate isolation components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If separate housing components are used for emitter and detector isolation, then optical cross-talk is reduced, but manufacturing complexity increases

Engineering Contradiction:

Improvelight leakageVSAvoidhousing fabrication

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

Multiple housing components (enclosure, partitions, walls) are merged into a single unitary housing structure that can be manufactured as one piece. This integration eliminates the need for separate assembly steps while maintaining effective optical isolation between emitter and detector chambers.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The housing is designed to incorporate both transparent and opaque materials in specific regions, allowing light transmission where needed (near detector) while blocking internal pathways (between chambers). This composite approach achieves optical isolation without requiring multiple separate components.

Inventive Principle:

Principle #40Composite materials

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

This solution effectively isolates light emitters from detectors, reducing cross-talk and noise, while maintaining a compact device design by preventing internal light pathways.

Implementation Method 1

an opaque portion disposed between the first and second transparent portions extending a thickness of the unitary optical component

Methodology Applied

Scientific EffectAbsorption (EM radiation): Absorption (EM radiation)

Implementation Method 2

The first transparent portion, the second transparent portion, and the opaque portion can define an exterior surface of the electronic device

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS20250134403A1Opaque splits embedded in transparent media for optical emitter/detector isolation

Publication Date: 2025.05.01 APPLE INC

AI summary

An electronic device can include a housing defining an aperture and at least partially defining an internal volume of the electronic device, an electromagnetic radiation emitter and an electromagnetic radiation detector disposed in the internal volume, and an optical component disposed in the aperture. The optical component can include a first and second transparent portions disposed above the electromagnetic radiation detector and the electromagnetic radiation emitter, and an opaque portion disposed between the first and second transparent portions and extending a thickness of the optical component. The first transparent portion, the second transparent portion, and the opaque portion can define a flush exterior surface of the electronic device.