Multi-Emitter Inclination Detection Without MEMS Scanning
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Solution Overview
Problem
Existing inclination detectors have complex configurations, often relying on movable components like MEMS mirrors, which complicates their design and functionality.
Innovation Solution
An inclination detector with a simple configuration that uses multiple light emitters to emit beams, a photosensor to receive and output electrical signals based on light intensity, and an output unit to determine the object's inclination without a movable section like a MEMS mirror, utilizing a photodiode for tracking object motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a MEMS mirror is used to scan the laser beam over the eyeball, then the inclination detection function is achieved, but the device complexity increases
Solution Approach 1:
The patent extracts and removes the MEMS mirror component from the inclination detection system. Instead of using a movable MEMS mirror to scan the laser beam, the invention employs a fixed configuration where multiple light emitters and a photosensor directly detect inclination through light intensity variations, thereby eliminating the complex movable section while maintaining detection functionality
Solution Approach 2:
The patent replaces the mechanical scanning system (MEMS mirror) with an optical detection system. By using multiple light emitters positioned at specific angles and a photosensor to detect light intensity variations, the system substitutes mechanical movement with optical field-based inclination detection, achieving simpler configuration and reduced moving parts
2Device complexity
If multiple light emitters and a photosensor are used without a MEMS mirror, then the device complexity is reduced, but the ability to track object motion must be maintained
Solution Approach 1:
The patent segments the light emission function into multiple independent light emitters positioned at different angular positions relative to the object. Each light emitter provides illumination from a specific direction, and the photosensor receives reflected light from multiple angles simultaneously. This segmentation allows the system to detect inclination and motion through spatial light intensity distribution without requiring mechanical scanning
Solution Approach 2:
The fixed configuration of multiple light emitters and a single photosensor serves multiple functions: it detects inclination angle, tracks object motion, and determines line-of-sight direction. The system achieves versatile functionality without movable components by utilizing the spatial and intensity information from the multi-emitter optical arrangement
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 proposed solution provides an inclination detection apparatus with a simplified structure, enabling accurate detection of object inclination and line-of-sight direction while reducing complexity and component count.
Implementation Method 1
a photosensor having a light-receiving surface configured to: receive the multiple beams reflected from the object on the light-receiving surface; and output an electrical signal based on light intensity of the multiple beams received on the light-receiving surface
Data Source
AI summary
An inclination detector includes: multiple light emitters configured to emit multiple beams to an object: a photosensor having a light-receiving surface; and an output unit. The photosensor is configured to receive the multiple beams reflected from the object on the light-receiving surface and output an electrical signal based on light intensity of the multiple beams received on the light-receiving surface. The output unit configured to output a result of detection of a degree of inclination of the object based on the electrical signal output from the photosensor. The photosensor is disposed at a position at which the light intensity of the multiple beams that are emitted from the multiple light emitters, reflected at the object, and received at the photosensor changes according to the degree of inclination of the object.