Optical Tomography Imaging Area Adjustment via Path Length Control
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Solution Overview
Problem
Current optical tomographic apparatuses for ophthalmic care face challenges in easily changing the size of the imaging area of tomographic images, leading to increased burden on subjects and difficulty in operation, along with decreased resolution and longer processing times during image enlargement.
Innovation Solution
An optical tomographic apparatus equipped with a measuring light path length changing unit and a movable focus lens, controlled by a unit that adjusts the optical path length and lens position to change the imaging area size, allowing for easy modification of the imaging area without compromising resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the imaging area size is changed by moving the fixation lamp and adjusting focus, then the desired site can be positioned in the imaging area, but the burden on the subject increases and operation becomes difficult
Solution Approach 1:
The invention makes the optical path length adjustable and dynamic rather than fixed. By enabling the optical path length to be changed according to different imaging requirements, the system can adapt to various imaging area sizes without requiring complex manual adjustments of the fixation lamp and focus, thereby reducing operational burden while maintaining versatility.
Solution Approach 2:
The invention changes the optical path length parameter to control the imaging area size. By adjusting this parameter, the system can easily switch between different imaging areas without the need for mechanical repositioning of components or complex focus adjustments, simplifying operation while preserving adaptability.
2Adaptability or versatility
If the taken tomographic image is enlarged and electronically sharpened, then the desired site can be emphasized, but resolution decreases and processing time increases
Solution Approach 1:
The invention performs preliminary action by capturing the complete tomographic image at the appropriate scale from the beginning. Instead of enlarging and sharpening a smaller image later (which degrades resolution), the system directly acquires the full-resolution image at the desired imaging area, eliminating the need for post-processing enlargement and preserving measurement precision.
3Device complexity
If the optical path length is fixed, then the interference optical system is simple, but the imaging area size cannot be easily changed
Solution Approach 1:
The invention introduces adjustability in the optical path length parameter while maintaining a relatively simple optical system structure. By enabling this single parameter to be changed, the system achieves versatile imaging area adjustment capability without requiring complex structural modifications, thus balancing device complexity with adaptability.
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
Enables easy adjustment of the imaging area size, reducing operational burden on subjects and maintaining high resolution, while allowing for efficient image processing and display of images with varying fields of view.
Implementation Method 1
measurement with high resolution and high sensitivity can be performed Through use of an interferometer
Implementation Method 2
a movable unit configured to move a focus lens for focusing the measuring light to the object to be inspected
Data Source
AI summary
In order to change a size of an imaging area of a tomographic image of an object to be inspected easily, provided is an optical tomographic apparatus for acquiring a tomographic image of an object to be inspected, the optical tomographic apparatus including a control unit for controlling a measuring light path length changing unit to change an optical path length of measuring light in a case where the size of the imaging area of the tomographic image is changed, and for controlling a movable unit for moving a focus lens for focusing the measuring light to the object to be inspected along an optical path to move the focus lens in association with the change in the optical path length of the measuring light.