Ophthalmologic apparatus and method for controlling ophthalmologic apparatus

By setting up an interference optical system and optical path length change unit in the ophthalmic device, combining the control methods of pre-scan and formal scanning, adjusting the optical path length and detecting the tomographic shape, the problem of large bending of the fundus tomography under wide-angle scanning is solved, and good three-dimensional data generation is achieved.

CN119768103APending Publication Date: 2025-04-04TOPCON CORPORATION
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Patent Information

Application Number
CN202380062341.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-09-02
Filing Date
2023-08-07
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

When performing three-dimensional fundus OCT shooting of the eye under test, especially the wider the scanning range of the measured light, the greater the curve of the fundus tomography in the B-scan image, resulting in the part of the fundus tomography not being displayed normally, affecting the generation of three-dimensional data.

Method used

By providing an interference optical system, an optical path length change unit, an optical scanner, a pre-scanning control unit, a tomographic shape acquisition unit, a formal scanning control unit, an optical path length adjustment control unit and a three-dimensional data generation unit in the ophthalmic device, the adjustment of the optical path length and detection of the tomographic shape are realized to ensure that the position of the fundus tomographic image in the B-scanning image is adjusted to the reference position.

Benefits of technology

It is possible to simply generate good three-dimensional data of the observed part of the eye to be examined, ensuring that the entire fundus tomography is included in the B-scan image, and improving the effect of three-dimensional OCT shooting.

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Abstract

Provided are an ophthalmologic device and a method for controlling the ophthalmologic device that can easily generate good three-dimensional data of a site to be observed of an eye to be examined. The present invention is provided with: a pre-scan control unit (216) that performs a pre-scan on a site to be observed (fundus (Ef)); a fault shape acquisition unit (218) that detects or predicts the fault shape of the site to be observed; a main scan control unit (220) that controls the optical scanner and performs a main scan on the site to be observed; an optical path length acquisition unit (214) that acquires an optimal optical path length in a specific scanning position of the main scan at least before the main scan; an optical path length adjustment control unit (224) that controls the optical path length changing unit and adjusts the optical path length to an optimal optical path length during execution of the main scan; and a three-dimensional data generation unit (226) that generates three-dimensional data (404) of the site to be observed.
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