JP2018171168A5

JP2018171168A5 -

Info

Publication number: JP2018171168A5
Application number: JP2017070040A
Authority: JP
Filing date: 2017-03-31
Publication date: 2020-05-07

Claims

An OCT optical system that divides the light from the OCT light source into a measurement optical path and a reference optical path, and detects an interference signal between the measurement light guided to the fundus of the eye to be examined via the measurement optical path and the reference light from the reference optical path by a detector. And an image processor capable of processing the spectral interference signal output from the OCT optical system to obtain OCT data.
The OCT optical system is
An OCT optical system that guides the measurement light to a wide-angle region including a fundus central portion and a fundus peripheral portion in one transverse direction in which the measurement light traverses the fundus,
A first reference optical path having an optical path length set to obtain OCT data including the center of the fundus, and a first reference optical path having an optical path length set to obtain OCT data including the peripheral part of the fundus. A second reference light path different from the reference light path,
The image processor is
While obtaining OCT data including the fundus center part based on an interference signal between the measurement light guided to the fundus center part and the reference light from the first reference optical path, the OCT data including the fundus center part is guided to the fundus peripheral part. An OCT apparatus comprising: obtaining OCT data including the fundus peripheral portion based on an interference signal between measurement light and reference light from the second reference light path.

The fundus center part is a region including at least the macula and the papilla of the fundus,
The OCT apparatus according to claim 1, wherein the fundus peripheral portion is a region including regions outside both end portions of the fundus central portion in one transverse direction.

The OCT optical system is
A first detector for detecting an interference signal between the measurement light guided to the center of the fundus and the reference light from the first reference light path;
A second detector different from the first detector for detecting an interference signal between the measurement light guided to the fundus peripheral portion and the reference light from the second reference optical path. 2 detectors,
Either OCT apparatus according to claim 1-2, characterized in that it comprises a.

In the first reference optical path, the first OCT data in a state where the choroid in the center of the fundus is formed on the anterior side of the zero delay position where the optical path lengths of the measurement light and the reference light match each other is acquired. either OCT apparatus according to claim 1 to 3, characterized in that the optical path length is set.

The OCT optical system is
Furthermore, an interference signal between the measurement light guided to the anterior segment of the eye to be inspected through the measurement optical path and the reference light from the reference optical path can be detected by a detector,
The first reference optical path and the second reference optical path are set to different optical path lengths, and one of the first reference optical path and the second reference optical path is for obtaining OCT data including a cornea of an eye to be inspected. 2. The optical path length of the first reference optical path and the second reference optical path are set to the optical path length for obtaining OCT data including the crystalline lens of the eye to be inspected. An OCT apparatus according to any one of 4 to 4 .