Eyeball Optical Measuring Instrument Angular Path Design
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Solution Overview
Problem
Current eyeball optical measuring instruments face challenges in non-invasively measuring the characteristics of the aqueous humor in the anterior chamber due to the risk of light reaching the retina and limited space for positioning the optical components, particularly when using laser light and when the eyeball is directed forward.
Innovation Solution
An optical measuring instrument with a light emission unit and photodetection unit positioned to emit and detect light passing through the anterior chamber at an angle, utilizing a holding unit that allows the optical path to traverse the aqueous humor while the eyeball is turned outward, effectively utilizing the available space and minimizing the risk of light reaching the retina.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light is emitted toward the anterior chamber when the eyeball is directed forward, then the optical path can be established for measurement, but the risk of light reaching the retina increases and the space for positioning optical components is limited
Solution Approach 1:
The patent employs a holding unit that enables dynamic adjustment of the optical measuring instrument's position and angle relative to the eyeball. The instrument can be rotated and tilted to optimize the optical path, allowing measurement when the eyeball is turned outward rather than directed forward, thus reducing the risk of light reaching the retina while maintaining measurement capability
Solution Approach 2:
The patent introduces angular and rotational dimensions to the positioning system. By rotating the instrument around the eyeball and adjusting its tilt angle, the optical path is redirected to pass through the anterior chamber at safe angles when the eyeball is turned outward, effectively utilizing three-dimensional space to resolve the conflict between measurement reliability and component positioning
2Reliability
If the optical path is configured to pass through the anterior chamber at an angle, then the risk of light reaching the retina is reduced, but the measurement accuracy may be compromised
Solution Approach 1:
The patent optimizes specific parameters including the angle of light incidence, the distance between the optical components and the eyeball, and the wavelength of light used. By carefully selecting and adjusting these parameters, the system achieves safe angular paths that still provide sufficient light interaction with the aqueous humor for accurate measurement of its characteristics
Solution Approach 2:
The patent employs photodetection units that can detect light signals with high sensitivity, compensating for the reduced interaction path length caused by angular configuration. Advanced detection techniques and signal processing methods are used to maintain measurement precision despite the modified optical geometry
3Measurement precision
If laser light is used for measurement, then the measurement sensitivity is improved, but the risk of light reaching the retina and causing damage increases
Solution Approach 1:
The patent extracts the measurement function from the direct forward path and relocates it to an angular path through the anterior chamber. By separating the light emission and detection paths from the central visual axis, the high-intensity laser light is redirected away from the retina while maintaining its utility for measuring aqueous humor characteristics
Solution Approach 2:
The patent uses the anterior chamber and aqueous humor as an intermediary medium. The laser light interacts with the aqueous humor in this intermediate space before any potential reach to the retina, allowing measurement of the aqueous humor's optical properties while the aqueous humor itself acts as a protective barrier that absorbs or scatters the light before it can reach the retina
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 configuration enables accurate and non-invasive measurement of the aqueous humor's characteristics, such as glucose concentration, with increased measurement accuracy and reduced risk of eye contact for the optical components, addressing the limitations of existing methods.
Implementation Method 1
a light emission unit that emits light toward an anterior chamber of an eyeball of a measurement subject person; a photodetection unit that detects the light that has passed through aqueous humor in the anterior chamber
Implementation Method 2
detects the light that has passed through aqueous humor in the anterior chamber
Data Source
AI summary
An optical measuring instrument 1 is equipped with an optical system 20 to be used for measuring a characteristic of the aqueous humor in the anterior chamber 13 of an eyeball 10 of a measurement subject person and a holding unit 50 which holds the optical system 20 etc. The optical system 20 is equipped with a light emitting system 20A and a photodetecting system 20B. An optical path 28 is set so that light emitted from the light emitting system 20A passes through (traverses) the anterior chamber 13 and is detected by the photodetecting system 20B in a state that the eyeball 10 is turned outward.