Ophthalmologic Apparatus Movable Part Drive Force Switching
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Solution Overview
Problem
Conventional ophthalmologic apparatuses face challenges in aligning the ophthalmic part with the eye to be inspected, particularly when the eye undergoes involuntary movement, leading to poor photography results due to the limitations of manual and auto alignment methods, and require a two-stage movable part configuration that complicates operation and increases the risk of optical axis eccentricity.
Innovation Solution
An ophthalmologic apparatus with a movable part that includes multiple movement modes, allowing for appropriate operation within individual ranges without being affected by the gravity center offset, utilizing a drive part and a drive force switching unit to switch between electric and manual movement modes, enabling precise alignment through a one-stage configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a two-stage movable part configuration is used to enable both auto alignment and manual alignment, then alignment functionality is improved, but device complexity increases and gravity center offset occurs
Solution Approach 1:
The patent merges the auto alignment and manual alignment functions into a single integrated movable part configuration. The electromechanical coupling mechanism allows the same movable part to be driven by either the drive mechanism (for auto alignment) or manual operation (for manual alignment), eliminating the need for separate two-stage configurations and their associated complexity.
2Adaptability or versatility
If a two-stage movable part configuration is used to enable both auto alignment and manual alignment, then alignment functionality is improved, but gravity center offset occurs affecting alignment accuracy
Solution Approach 1:
The patent merges the auto alignment and manual alignment functions into a single integrated movable part configuration. The electromechanical coupling mechanism allows the same movable part to be driven by either the drive mechanism (for auto alignment) or manual operation (for manual alignment), eliminating the need for separate two-stage configurations and their associated complexity.
3Productivity
If auto alignment is used to achieve alignment in shorter time, then productivity is improved, but alignment accuracy deteriorates when eye movement is large
Solution Approach 1:
The patent implements a dynamic switching mechanism that allows transition between auto alignment mode (for speed) and manual alignment mode (for accuracy). The drive force transmit switching unit enables the system to adaptively select the appropriate alignment mode based on the specific inspection requirements, allowing fast auto alignment when suitable and precise manual alignment when needed.
4Measurement precision
If manual alignment using electric joystick is used for minute operation, then alignment accuracy is improved, but ease of operation deteriorates and time consumption increases
Solution Approach 1:
The patent implements a dynamic switching mechanism that allows transition between auto alignment mode (for speed) and manual alignment mode (for accuracy). The drive force transmit switching unit enables the system to adaptively select the appropriate alignment mode based on the specific inspection requirements, allowing fast auto alignment when suitable and precise manual alignment when needed.
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 solution enhances alignment accuracy and operability by reducing the eccentricity between the photographing optical axis and pupil center, improving manual alignment precision, and reducing the apparatus's weight, cost, and space requirements, while maintaining functionality even if the auto alignment component fails.
Implementation Method 1
a drive part that transmits electric drive force for horizontal movement of the movable part
Implementation Method 2
a drive force transmit switching unit that switches whether or not to execute transmission of the electric drive force from the drive part to the movable part
Data Source
AI summary
An ophthalmologic apparatus wherein auto alignment and manual alignment can be selectively used to enhance alignment accuracy between an eye to be inspected and an ophthalmic part includes an ophthalmic part that detects an eye to be inspected, a fixing part, a movable part on which the ophthalmic part is placed and configured to be movable with respect to the fixing unit in a horizontal direction, a drive part that transmits electric drive force for horizontal movement of the movable part, an alignment detection unit that detects a relative position between the eye to be inspected and ophthalmic part, a controller that controls the movable part based on a detection result from the alignment detection unit, and a drive force transmit switching unit that switches whether or not to execute transmission of the drive force from the drive part to the movable part.