Ophthalmic Apparatus Alignment Path Switching
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Solution Overview
Problem
Conventional ophthalmic apparatuses fail to appropriately switch and align examination optical axes according to different measurement modes, leading to inefficient alignment processes.
Innovation Solution
An ophthalmic apparatus with a first and second optometry unit, a drive unit for three-dimensional movement, a controller for path switching based on examination mode, and a face photographing unit to detect eye alignment, allowing for precise alignment adjustments according to selected examinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a combined apparatus switches over examination optical axes according to measurement mode, then multiple examinations can be performed, but rough alignment cannot be appropriately made
Solution Approach 1:
The patent divides the alignment control into separate paths for different optometry units. The controller is configured to switch between a first path for alignment of the first optometry unit and a second path for alignment of the second optometry unit based on the selected examination mode. This segmentation allows each optometry unit to have its own optimized alignment path, resolving the contradiction between versatility and ease of operation.
Solution Approach 2:
The patent implements dynamic switching of alignment paths based on the selected measurement mode. The controller dynamically selects which alignment path to use (first path or second path) according to the examination type, enabling the system to adapt its alignment behavior to the specific requirements of each optometry unit while maintaining ease of operation.
2Device complexity
If a single alignment path is used for multiple optometry units, then device complexity is reduced, but alignment accuracy for different examination modes deteriorates
Solution Approach 1:
The patent uses a single face photographing unit that serves multiple functions: it photographs the examinee's face for alignment purposes regardless of which optometry unit is selected. The controller universally applies face image data to determine alignment paths for different optometry units, maintaining device simplicity while achieving mode-specific alignment accuracy through intelligent control logic.
Data Source
AI summary
An ophthalmic apparatus to examine an examinee's eye includes: a first optometry unit to perform a first examination of the examinee's eye; a second optometry unit to perform a second examination of the examinee's eye; a drive unit to cause relative movement of the first and second optometry units in three-dimensional manner relative to the examinee's eye; a controller to control the drive unit; a selection receiving unit to receive a selection signal representing at least one selected from the first second examinations; and a face photographing unit to photograph a face image including at least one of examinee's right and left eyes. The controller switches, according to the selection signal, between a first path for alignment of the first optometry unit with the eye detected from the face image and a second path for alignment of the second optometry unit with the eye detected from the face image.