OCT Device Pivot Point Positioning for Wide-Angle Eye Scanning
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Solution Overview
Problem
Current OCT devices lack the capability for extensive scanning of both the anterior segment and fundus of a subject eye, with limited imaging range and unknown actual position of the fovea centralis, which affects the accuracy of physiological squint angle determination.
Innovation Solution
An OCT device with an optical system that includes a light splitter, detector, and arithmetic controller, along with a light guide optical system featuring an optical scanner and alignment adjuster, which allows for three-dimensional positioning of the pivot point between the subject eye and objective optical system, enabling wide-range imaging of both anterior and fundus segments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional OCT scanning methods are used, then imaging of either anterior segment or fundus can be achieved, but extensive scanning of both anterior segment and fundus in a single acquisition is not possible
Solution Approach 1:
The patent implements dynamic control of the optical scanner to switch between different scanning patterns (anterior segment scanning and fundus scanning) based on the selected imaging mode. The arithmetic controller dynamically adjusts scanner parameters including pivot point position and scanning trajectory to accommodate both anterior segment and fundus imaging requirements within a single acquisition sequence.
Solution Approach 2:
The optical scanner is designed with multi-functionality to perform both anterior segment scanning and fundus scanning using the same hardware components. By adjusting the pivot point position and scanning trajectory through the alignment adjuster and controller, a single scanner serves multiple imaging purposes, eliminating the need for separate dedicated scanning systems for each ocular region.
2Area of stationary object
If the imaging range is expanded to include both anterior segment and fundus, then comprehensive OCT data can be acquired, but the device complexity increases
Solution Approach 1:
The patent merges anterior segment imaging and fundus imaging capabilities into a single integrated OCT system. The same light source, optical scanner, and detector are used for both imaging modes by reconfiguring the optical path through the alignment adjuster and pivot point positioning, combining multiple imaging functions into one unified device.
Solution Approach 2:
The system uses its own optical components and scanning mechanisms to automatically adapt between different imaging modes. The arithmetic controller manages the reconfiguration of the optical path and scanning parameters without requiring external辅助设备, allowing the system to serve multiple imaging purposes through self-reconfiguration.
3Adaptability or versatility
If the pivot point position is fixed, then the optical system is simple, but the imaging range is limited to specific regions
Solution Approach 1:
The alignment adjuster serves as an intermediary component between the fixed optical scanner and the subject eye, enabling dynamic repositioning of the pivot point. This intermediary mechanism allows the system to adapt to different imaging requirements by adjusting the pivot point position without requiring the entire optical scanner to be movable, maintaining relative simplicity while achieving positioning flexibility.
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
Facilitates comprehensive scanning of the anterior segment and fundus in a single shot, providing accurate positional information for synthesizing OCT data and determining physiological squint angles, thereby improving imaging range and accuracy.
Implementation Method 1
a light splitter that splits light from an OCT light source into measurement light and reference light
Implementation Method 2
a detector that detects a spectral interference signal between the measurement light guided to a subject eye and the reference light
Data Source
AI summary
An OCT device includes an OCT optical system, a controller which acquires OCT data based on a signal from the OCT optical system and controls the OCT optical system to execute an OCT data acquisition operation, a light guide optical system, and an adjuster adjusting a three-dimensional position of the light guide optical system with respect to a subject eye. The light guide optical system includes an optical scanner scanning the subject eye with the measurement light, and an objective optical system which is disposed between the optical scanner and the subject eye and forms a pivot point around which the measurement light passing through the optical scanner is pivoted. The controller guides the three-dimensional position such that the pivot point is arranged at a target position set between the subject eye and the objective optical system, and further executes the OCT data acquisition operation at the target position.