Slit Lamp Microscope Inward Angle Changing Section
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Solution Overview
Problem
Conventional slit lamp microscopes with an inward angle changing section require the eyepiece lenses to be moved closer to the observer, increasing the reaching distance, which can be a challenge for physically small operators to handle the operation parts effectively.
Innovation Solution
The slit lamp microscope design includes an inward angle changing section located closer to the object lens than the magnification changing section, with a supporting section extending downward to maintain the eyepiece lenses' position, allowing the inward angle changing section to be positioned closer to the examinee without altering the eyepiece lenses' position, and an optional inward angle changing unit that can be attached or detached to change the viewing angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an inward angle changing section is added to the microscope unit, then the binocular viewing angle can be adjusted, but the eyepiece lenses must be moved closer to the observer, increasing the reaching distance
Solution Approach 1:
The patent introduces a new spatial dimension by extending the supporting section downward from the magnification changing section. This vertical extension allows the inward angle changing section to be positioned closer to the object lens without affecting the horizontal position of the eyepiece lenses, thus resolving the contradiction between viewing angle adjustment and reaching distance
Solution Approach 2:
The microscope unit is segmented into distinct functional sections: the object lens, the magnification changing section, the supporting section extending downward, and the inward angle changing section. This segmentation allows independent positioning of each component, enabling the inward angle changing section to be located optimally without compromising eyepiece lens position
2Adaptability or versatility
If the inward angle changing section is located closer to the object lens, then the stereo-vision region can be made wider, but the structure becomes more complex
Solution Approach 1:
The supporting section serves multiple functions: it provides structural support for the magnification changing section, extends the optical path length, and enables proper positioning of the inward angle changing section. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity
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 design prevents the increase of the reaching distance and ensures operability, allowing for adjustable stereo-vision region width and brightness by moving the inward angle changing section within or outside the optical paths.
Implementation Method 1
a reflecting mirror or prism for reflecting the slit light emitted from the slit lamp toward an eye of an examinee
Implementation Method 2
a microscope unit including an object lens, binocular eyepiece lenses
Implementation Method 3
a prism is used as the inward angle changing section
Data Source
AI summary
The slit lamp microscope comprises: a slit light optical system including a slit lamp, and a reflecting mirror or prism for reflecting a slit light from the slit lamp toward an eye of an examinee; and a microscope unit including an object lens, binocular eyepiece lenses, a magnification changing section, which changes magnifications of an image formed by light passing through the optical paths, being provided between the object lens and the eyepiece lenses, and an inward angle changing section, which changes a binocular viewing angle, being provided therebetween. A focal distance of the object lens is made shorter, by an optical path length of the inward angle changing section, than that of an object lens equipped with no inward angle changing section. The inward angle changing section is located closer to the object lens than to the magnification changing section.