Optical Device Dynamic Parameter Adjustment for Inclination Detection

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Solution Overview

Problem

Existing optical devices face challenges in accurately detecting the inclination of objects, such as human eyes, due to variations in eye size, shape, and optical device placement, leading to increased detection errors when the reflected light deviates from expected positions.

Innovation Solution

The optical device employs a light source to irradiate the object, a position-sensitive detector to capture the reflected light, and circuitry to output data on the object's inclination based on the light's position and adjustable parameters, which are modified based on the center of gravity and distribution of detection values to compensate for deviations in eye characteristics and device placement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If fixed parameters are used for inclination detection, then device structure is simple, but detection precision deteriorates due to variations in eye characteristics and device placement

Engineering Contradiction:

Improveinclination detection precisionVSAvoidparameter adjustment mechanism complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent implements dynamic parameter adjustment by modifying detection parameters based on the actual position of reflected light and calculated inclination values. This allows the system to adapt to variations in eye characteristics and device placement, resolving the contradiction between maintaining simple device structure and achieving high detection precision across different conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes detection parameters dynamically based on measured light position and inclination data. By adjusting parameters according to actual operating conditions rather than using fixed values, the system achieves high precision across varying eye characteristics and device placements without requiring complex hardware modifications.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If detection parameters are fixed, then device operation is simple, but adaptability deteriorates when reflected light deviates from expected positions

Engineering Contradiction:

Improveadaptability to eye variationsVSAvoidparameter change mechanism

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system performs self-adjustment by automatically modifying detection parameters based on the measured position of reflected light and calculated inclination values. This self-service mechanism enables the device to adapt to individual eye variations and placement discrepancies without requiring external calibration or complex adjustment mechanisms, resolving the contradiction between adaptability and device complexity.

Inventive Principle:

Principle #25Self-service

3Measurement precision

If standard detection parameters are used, then device manufacturing is simple, but detection precision deteriorates for individual eye variations

Engineering Contradiction:

Improveline-of-sight detection accuracyVSAvoiddevice standardization

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent performs preliminary parameter adjustment by calculating optimal detection parameters based on the measured position of reflected light before conducting the main inclination detection. This preliminary action allows the system to compensate for individual eye variations and placement differences, achieving high detection accuracy while maintaining standardized manufacturing processes.

Inventive Principle:

Principle #10Preliminary action

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 approach reduces detection errors by adapting to individual eye variations and device placement discrepancies, ensuring accurate line-of-sight detection even when the reflected light deviates significantly.

Implementation Method 1

a light source configured to irradiate an object with light, a detector configured to detect a position of the light reflected by the object

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS11914151B2Optical device, method of detecting degree of inclination of three-dimensional object, and line-of-sight detection method

Publication Date: 2024.02.27 RICOH CO LTD

AI summary

An optical device, a method of detecting inclination of a three-dimensional object, and a method of detecting a line-of-sight. The optical device includes a light source configured to irradiate an object with light, a detector configured to detect a position of the light reflected by the object, and circuitry configured to output data of a degree of inclination of the object obtained based on the position of the light and a prescribed parameter, and change the prescribed parameter based on the position of the light. The above methods include irradiating an object with light, detecting a position of the light reflected by the object, outputting data of a degree of inclination of the object obtained based on the position of the light and a prescribed parameter, and changing the prescribed parameter based on the position of the light.