Microlens Eye Inspection Optics for Single-Sensor Dual-Eye Detection
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Solution Overview
Problem
Existing inspection apparatuses face challenges in simplifying the optical system for measuring the fixation state of both eyes due to the need for separate image sensors for each eye, leading to complexity and difficulty in reducing the system size.
Innovation Solution
An optical system that focuses light from both eyes on a single image sensor using distinct pupils, employing a microlens and conversion portions to separate and detect reflection light from each eye, thereby simplifying the optical system and reducing its size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate image sensors are used for each eye to detect reflection light, then detection accuracy for each eye is improved, but device complexity increases
Solution Approach 1:
The patent combines two separate image sensors into a single shared image sensor that detects reflection light from both eyes simultaneously. The optical system uses beam splitting or spatial separation to guide light from the right eye and left eye to different regions of the same sensor, thereby reducing device complexity while maintaining detection accuracy for each eye.
Solution Approach 2:
The single image sensor is designed to perform multiple functions by detecting reflection light from both the right eye and left eye. The sensor serves as a universal detection device that processes optical signals from multiple sources (both eyes) through appropriate optical path management, eliminating the need for separate dedicated sensors for each eye.
2Productivity
If separate image sensors are used for each eye, then simultaneous detection of both eyes is improved, but the system size increases
Solution Approach 1:
The patent merges two separate detection systems into one by using a single shared image sensor for both eyes. This consolidation reduces the overall system volume while preserving the ability to simultaneously detect reflection light from both eyes through proper optical path design and light separation mechanisms.
Solution Approach 2:
The patent utilizes spatial dimensionality within the single image sensor by assigning different spatial regions or pixel areas to detect light from different eyes. This dimensional organization allows simultaneous detection of both eyes within the same sensor plane, reducing system size while maintaining parallel detection capability.
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 allows for simultaneous detection of reflection light from both eyes on a single image sensor, achieving a compact optical system design while maintaining high accuracy in fixation state measurement.
Implementation Method 1
the microlens causes the first light to enter the first conversion portion and causes the second light to enter the second conversion portion
Implementation Method 2
the optical system focuses the first light on the microlens via a first pupil and focuses the second light on the microlens via a second pupil
Data Source
AI summary
An inspection apparatus configured to detect first light from a first eye of a subject and second light from a second eye of the subject includes an optical system, and an image sensor, wherein the image sensor includes a pixel including a microlens, a first conversion portion, and a second conversion portion, wherein the optical system focuses the first light on the microlens via a first pupil and focuses the second light on the microlens via a second pupil, and wherein the microlens causes the first light to enter the first conversion portion and causes the second light to enter the second conversion portion.