Ophthalmologic Apparatus Optical Head Movement Area Adjustment
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Solution Overview
Problem
Ophthalmologic apparatuses face challenges in efficiently switching between anterior segment and fundus photography modes, often requiring careful operation to ensure proper attachment and focus, leading to potential errors in image acquisition due to the complexity of managing different optical paths and attachment members.
Innovation Solution
An ophthalmologic apparatus with a photographing mode selecting unit, a moving unit for the optical path, and an area changing unit that adjusts the movement area based on the selected mode, ensuring proper attachment and focus by disabling the start button until all necessary attachment members are correctly attached for anterior segment photography, and restricting the optical head's movement area to maintain appropriate distance for easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a large Z axis stroke is used to enable focusing on both fundus and anterior segment, then the apparatus can perform multiple photography modes, but the main body becomes large and operation becomes complex
Solution Approach 1:
The invention divides the photography function into separate modes (anterior segment mode and fundus mode) with dedicated optical paths and attachment members. Each mode has its own optimized optical configuration, allowing the apparatus to achieve versatility through functional segmentation rather than a single complex optical system.
Solution Approach 2:
The apparatus employs detachable attachment members that can be configured for different photography modes. The universal main body supports multiple specialized attachments, enabling one apparatus to perform multiple functions (anterior segment photography, fundus photography) without requiring a permanently complex structure.
2Device complexity
If detachable attachment members are used for anterior segment photography, then the apparatus can be compact, but it may be forgotten to attach or detach the members properly
Solution Approach 1:
The control unit receives attachment status information from detection means (such as sensors or switches) and provides feedback by displaying the current mode status. This feedback mechanism alerts the operator to the attachment state, reducing the likelihood of forgetting to attach or detach members properly.
Solution Approach 2:
The system performs preliminary checks of attachment status before allowing operation in a specific mode. The control unit verifies that the correct attachment member is in place before enabling the corresponding photography mode, preventing operation with incorrect or missing attachments.
3Manufacturing precision
If the distance between apparatus main body and eye is decreased for anterior segment photography, then the optical path is optimized, but the operation must be performed carefully to avoid errors
Solution Approach 1:
The moving unit dynamically adjusts the optical head position based on the selected photography mode. When anterior segment mode is selected, the optical head automatically moves to the appropriate distance from the eye. This dynamic positioning eliminates the need for manual distance adjustment and reduces operational errors.
Solution Approach 2:
The system automatically configures the optical path and positioning when a photography mode is selected. The apparatus performs self-adjustment of the optical head position and optical parameters based on the selected mode, reducing the burden on the operator and minimizing manual intervention errors.
Data Source
AI summary
When an anterior segment photographing mode is selected, ease of operation by an inspector is improved. An ophthalmologic apparatus includes an area changing unit for changing a movement area of an optical unit including an optical path of measuring light, when an anterior segment photographing mode for photographing an anterior segment of an eye to be inspected is selected, to be different from a movement area when a mode other than the anterior segment photographing mode is selected.