Ophthalmologic Apparatus Background Illumination Shading Reduction
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Solution Overview
Problem
Existing ophthalmologic apparatuses with background illumination and imaging functions are complex in configuration, leading to issues such as shading of the subject's eye due to eyelid shape or state, and require separate power sources, increasing installation space and wiring complexity.
Innovation Solution
An ophthalmologic apparatus with a rotatable illumination system and an observation system opposite to the illumination system, where the camera device includes an imaging unit and a light emitting unit for background illumination located below the subject's eye, allowing for a simple configuration and shared power supply, reducing the number of wires and space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the background illuminator is provided above the observation system, then the illumination light can be projected toward the subject's eye, but the observation region may be shaded depending on the shape or state of the eyelid
Solution Approach 1:
The patent changes the spatial dimension of light emission from above (vertical direction) to below (horizontal direction relative to the eye). The light emitting unit is arranged in the observation system below the subject's eye, projecting illumination light from a different spatial dimension that avoids being blocked by the eyelid, thus eliminating the shading problem while maintaining background illumination functionality
2Illumination intensity
If the background illuminator is provided separately from the observation system, then background illumination can be achieved, but the installation space and wiring complexity increase
Solution Approach 1:
The patent merges the background illumination function with the observation system by integrating the light emitting unit into the observation system's cable. This combination eliminates the need for a separate power cable for the background illuminator, reducing wiring complexity and installation space requirements while maintaining the background illumination 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 configuration provides a simple and effective background illumination and imaging function for the subject's eye, reducing shading issues and minimizing space and wiring needs, while allowing for more accurate observation and efficient operation.
Implementation Method 1
a light emitting unit for background illumination that is provided in the observation system and located below the subject's eye
Implementation Method 2
an imaging unit that receives reflection of the illumination light from the subject's eye
Data Source
AI summary
An ophthalmologic apparatus includes an illumination system that is supported to be rotatable about a subject's eye with an irradiation direction of illumination light kept toward the subject's eye and an observation system that has a camera device and is arranged opposite to a position of the subject's eye across the illumination system. The camera device includes an imaging unit that receives reflection of the illumination light from the subject's eye and a light emitting unit for background illumination that is provided in the observation system and located below the subject's eye.