Binocular Light Diffuser Layout for Accurate Sensitivity Threshold Testing

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Solution Overview

Problem

Existing light sensitivity measurement systems are bulky, difficult to move, and lack sufficient light homogeneity, making it challenging to determine a user's light sensitivity threshold accurately and comfortably.

Innovation Solution

A wearable binocular optoelectronic device with a diffuser and light source configured to provide quasi-homogeneous light diffusion, allowing precise measurement of light sensitivity threshold with easy handling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a stationary interactive testing system is used to measure light sensitivity, then measurement capability is provided, but device portability and ease of operation deteriorate due to bulkiness and heaviness

Engineering Contradiction:

Improvelight sensitivity measurement capabilityVSAvoiddevice portability

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent divides the measurement system into separate functional components: a portable light source device that can be worn on the head, and a separate measurement/recording system. This segmentation allows the light source to be mobile and comfortable for the user while the measurement equipment can be stationary or portable, resolving the contradiction between measurement capability and portability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an intermediary wearable light source device that sits between the user and the external environment. This mediator provides controlled homogeneous light exposure to the eyes while being comfortable to wear, enabling accurate light sensitivity measurements without requiring a bulky stationary system.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Illumination intensity

If conventional light sources are used in measurement devices, then illumination is provided, but light homogeneity deteriorates making threshold determination inaccurate

Engineering Contradiction:

Improvelight provision capabilityVSAvoidlight sensitivity threshold accuracy

Core Design Contradiction:

Illumination intensityVSMeasurement precision

Solution Approach 1:

The patent applies homogeneity principles by designing the light source to emit uniformly distributed light across the visual field. The wearable light source is positioned and configured to provide homogeneous illumination to both eyes simultaneously, which is essential for accurate light sensitivity threshold determination. This resolves the contradiction by ensuring both adequate illumination intensity and uniform distribution.

Inventive Principle:

Principle #33Homogeneity

Solution Approach 2:

The patent creates equipotential light conditions by ensuring that both eyes receive equivalent light exposure from the wearable source. This symmetric and balanced illumination approach allows for accurate binocular light sensitivity measurements, as both eyes are subjected to the same light conditions, enabling precise threshold determination.

Inventive Principle:

Principle #12Equipotentiality

3Ease of operation

If wearable configuration is implemented for portability, then ease of operation improves, but energy consumption increases due to battery requirements

Engineering Contradiction:

Improvedevice portability and handlingVSAvoidbattery energy consumption

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic action by controlling the wearable light source to emit light in controlled intervals or sequences rather than continuously. The light source can be activated only when needed for measurement, reducing overall energy consumption while maintaining portability and ease of operation. This allows the device to be battery-powered without excessive energy drain.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent applies parameter changes by adjusting the light source intensity, duration, and spectral characteristics to optimize energy efficiency. The wearable device can modify light emission parameters dynamically during measurement, providing adequate illumination for accurate measurements while minimizing power consumption to extend battery life and maintain portability.

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

Enables accurate and comfortable measurement of light sensitivity threshold with reduced energy consumption, facilitating easy use by both professionals and users in various conditions.

Implementation Method 1

a diffuser configured to provide quasi-homogeneous light diffusion to at least one eye of the user from light emitted by said at least one light source

Methodology Applied

Scientific EffectLight diffusion: Scattering

Data Source

PatentEP3752046B1Wearable binocular optoelectronic device for measuring light sensitivity threshold of a user

Publication Date: 2026.01.07 ESSILOR INTERNATIONAL(COMPAGNIE GENERALE D OPTIQUE)

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AI summary

The invention provides a binocular optoelectronic device (10) wearable by a user for measuring a light sensitivity threshold of the user, comprising: - a diffuser (12) configured to face eyes of the user, - at least one light source (14) for emitting light toward said diffuser (12), wherein the diffuser (12) comprises predetermined parameters allowing to provide a quasi-homogeneous light diffusion to at least one eye of the user from light emitted by said at least one light source (14).