CN107137057B - OCT imaging device and method for anterior ocular segment - Google Patents
OCT imaging device and method for anterior ocular segment Download PDFInfo
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- CN107137057B CN107137057B CN201710404090.4A CN201710404090A CN107137057B CN 107137057 B CN107137057 B CN 107137057B CN 201710404090 A CN201710404090 A CN 201710404090A CN 107137057 B CN107137057 B CN 107137057B
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- ocular segment
- sample arm
- deconcentrator
- arm
- reference arm
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
- A61B3/1225—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes using coherent radiation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
Abstract
The invention discloses an OCT imaging device and method for anterior ocular segment, the device comprises: the device comprises a light source, a deconcentrator, a sample arm, a reference arm and a signal processor, wherein the deconcentrator is connected with the signal processor, the sample arm comprises a first collimating lens, a scanning galvanometer, an electric rotating frame, a scanning lens and an ophthalmoscope, the scanning galvanometer comprises an X scanning galvanometer and a Y scanning galvanometer, and a light beam emitted by the light source is divided into a sample arm light beam and a reference arm light beam after passing through the deconcentrator; the electric wheel rotating frame controls the sample arm beam to be switched between the achromatic lens and the dichroic mirror, so that real-time imaging of the anterior segment and the posterior segment of the eye is realized respectively; the reference arm beam is reflected back into the splitter after entering the reference arm. According to the OCT imaging device and method for the anterior ocular segment, the electric rotating wheel frame is added in the optical path of the sample arm, the electric rotating wheel frame controls the optical path of the sample arm to be switched between the achromatic lens and the dichroic mirror, so that the anterior ocular segment and the posterior ocular segment can be tested respectively, the structure is simpler, and the operation is more convenient.
Description
Technical Field
The invention relates to the technical field of medical imaging, in particular to an OCT imaging device and method for anterior ocular segment.
Background
OCT is also called optical correlation tomography, which is an imaging technology developed rapidly in the last decade, and uses the basic principle of a weak coherent light interferometer to detect back reflection or several scattering signals of different depth layers of biological tissues facing incident weak coherent light, and can obtain two-dimensional or three-dimensional structural images of the biological tissues through scanning. When the existing anterior ocular segment OCT imaging device scans, the OCT main scanning light path needs to be switched, or a lens is additionally added in front of the OCT, so that the operation is complex, and more space is occupied.
Disclosure of Invention
Aiming at the defects of the prior art, one of the purposes of the invention is to provide an OCT imaging device for the anterior ocular segment, which has simple structure, simple operation and space saving.
The second purpose of the invention is to provide an OCT imaging method of the anterior ocular segment, which is simple to operate and does not need to switch the light path of the whole sample arm.
One of the purposes of the invention is realized by adopting the following technical scheme:
the OCT imaging device comprises a light source, a deconcentrator, a sample arm, a reference arm and a signal processor, wherein the deconcentrator is connected with the signal processor, the sample arm comprises a first collimating lens, a scanning galvanometer, an electric rotating frame, a scanning lens and an ophthalmoscope, the scanning galvanometer comprises an X scanning galvanometer and a Y scanning galvanometer, and a light beam emitted by the light source is divided into a sample arm light beam and a reference arm light beam after passing through the deconcentrator;
the sample arm light beam sequentially passes through the first collimating lens, the scanning galvanometer, the electric wheel rotating frame, the scanning lens and the ophthalmoscope to reach human eyes, and then is reflected back to the deconcentrator, an achromatic lens and a dichroic mirror are arranged on the electric wheel rotating frame, and the electric wheel rotating frame controls the sample arm light beam to be switched between the achromatic lens and the dichroic mirror, so that real-time imaging of anterior ocular segment and posterior ocular segment is respectively realized;
the reference arm beam enters the reference arm and is reflected back to the deconcentrator.
Further, the reference arm comprises a second collimating lens and a reflector, and the reference arm beam is collimated after passing through the second collimating lens and then reflected back to the deconcentrator after passing through the reflector.
Further, the ophthalmoscope is a double-sided even aspherical lens.
The second purpose of the invention is realized by adopting the following technical scheme:
an anterior ocular segment OCT imaging method comprising:
the light beam emitted by the light source is divided into a sample arm light beam and a reference arm light beam after passing through the deconcentrator, the sample arm light beam enters the sample arm, and the reference arm light beam enters the reference arm;
the electric wheel turning frame in the sample arm controls the sample arm beam to be switched between the achromatic lens and the dichroic mirror, so that the imaging of the anterior ocular segment and the posterior ocular segment is respectively realized;
the sample arm beam is reflected back to the deconcentrator after being imaged;
the reference arm beam enters the reference arm and then is reflected back to the deconcentrator;
the reflected sample arm beam interferes with the reference arm beam;
the signal processor processes the interference information to realize OCT imaging.
Further, the electric wheel rotating frame controls the sample arm beam to be switched between the achromatic lens and the dichroic mirror, so as to respectively realize real-time imaging of the anterior eye section and the posterior eye section, and specifically comprises the following steps:
an motorized wheel carriage in the sample arm switches the sample arm beam to the achromat when testing the anterior ocular segment and the dichroic mirror when testing the posterior ocular segment.
Further, the reference arm comprises a second collimating lens and a reflector, and the reference arm beam is collimated after passing through the second collimating lens and then reflected back to the deconcentrator after passing through the reflector.
Compared with the prior art, the invention has the beneficial effects that: an electric rotating wheel frame is added in a sample arm light path, the sample arm light path is controlled to be switched between the achromatic lens and the dichroic mirror through the electric rotating wheel frame, the test of the anterior ocular segment and the posterior ocular segment is respectively realized, the whole sample arm light path is not required to be switched, or a lens is additionally added in front of the OCT, the structure is simpler, the operation is more convenient, the occupied space is reduced, and the working efficiency is improved.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as the preferred embodiments thereof, together with the following detailed description of the invention, given by way of illustration only, together with the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of an OCT imaging device for anterior ocular segment in an embodiment of the present invention;
FIG. 2 is a schematic view of an electric truck in accordance with an embodiment of the present invention;
fig. 3 is a schematic diagram of an OCT imaging method for anterior ocular segment in an embodiment of the present invention.
In the figure: 10. a light source; 20. a wire divider; 30. a sample arm; 31. a first collimating lens; 32. scanning a vibrating mirror; 33. a rotating frame of the electric wheel; 331. an achromatic lens; 332. a dichroic mirror; 34. a scanning lens; 35. an ophthalmoscope; 36. a human eye; 40. a reference arm; 41. a second collimating lens; 42. a reflective mirror; 50. and a signal processor.
Detailed Description
The invention will be further described with reference to the accompanying drawings and detailed description below:
referring to fig. 1-2, in an embodiment of the present invention, the OCT imaging apparatus for anterior ocular segment includes a light source 10, a deconcentrator 20, a sample arm 30, a reference arm 40, and a signal processor 50, where the deconcentrator 20 is connected to the signal processor 50, the sample arm 30 includes a first collimating lens 31, a scanning galvanometer 32, an electric rotating frame 33, a scanning lens 34, and an ophthalmoscope 35, the scanning galvanometer 32 includes an X-scanning galvanometer and a Y-scanning galvanometer, an achromatic lens 331 and a dichroic mirror 332 are disposed on the electric rotating frame 33, the reference arm 40 includes a second collimating lens 41 and a reflective mirror 42, and a beam emitted from the light source 10 is split into a sample arm beam and a reference arm beam after passing through the deconcentrator 20.
The optical path of the sample arm beam is as follows: the sample arm beam sequentially passes through the first collimating lens 31, the scanning galvanometer 32, the electric wheel rotating frame 33, the scanning lens 34 and the ophthalmoscope 35 to reach the human eye 36, and then is reflected back to the deconcentrator 20, the electric wheel rotating frame 33 controls the sample arm beam to be switched between the achromatic lens 331 and the dichroic mirror 332, wherein the electric wheel frame 33 switches the sample arm beam to the achromatic lens 331 when testing the anterior ocular segment, and the electric wheel frame 33 switches the sample arm beam to the dichroic mirror 332 when testing the posterior ocular segment, so that real-time imaging of the anterior ocular segment and the posterior ocular segment is realized respectively;
the optical path of the reference arm beam is as follows: the reference arm beam is collimated by the second collimating lens 41 and then reflected back to the deconcentrator 20 by the mirror 42;
the reflected sample arm beam interferes with the reference arm beam, and the signal processor 50 processes the interference information to perform OCT imaging.
As a further embodiment, the ophthalmoscope 35 is a double-sided even aspheric lens, so that the focal plane of the scanning light path of the sample arm beam is a cambered surface for focusing, and is more close to the physiological structure of human eyes and clearer.
As shown in fig. 3, the method for OCT imaging of anterior ocular segment according to an embodiment of the present invention includes:
step 10, dividing a light beam emitted by a light source into a sample arm light beam and a reference arm light beam after passing through a deconcentrator, wherein the sample arm light beam enters a sample arm, and the reference arm light beam enters a reference arm;
the sample arm comprises a first collimating lens, a scanning galvanometer, an electric rotating wheel frame, a scanning lens and an ophthalmoscope, and the reference arm comprises a second collimating lens and a reflecting mirror.
Step 20, controlling a sample arm beam to be switched between an achromat lens and a dichroic mirror by an electric wheel rotating frame in a sample arm, and respectively realizing the test of a front eye section and a rear eye section;
specifically, the sample arm light beam sequentially passes through the first collimating lens, the scanning galvanometer, the electric wheel rotating frame, the scanning lens and the ophthalmoscope to reach human eyes, the scanning galvanometer comprises an X scanning galvanometer and a Y scanning galvanometer, an achromatic lens and a dichroic mirror are arranged on the electric wheel rotating frame, when the front section of the eyes is tested, the electric wheel rotating frame in the sample arm switches the sample arm light beam to the achromatic lens, and when the rear section of the eyes is tested, the electric wheel rotating frame in the sample arm switches the sample arm light beam to the dichroic mirror.
Step 30, reflecting the sample arm beam back to the deconcentrator after testing;
step 40, the reference arm beam enters the reference arm and then is reflected back to the deconcentrator;
specifically, the reference arm beam is collimated by the second collimating lens and then reflected back to the deconcentrator by the reflector.
Step 50, the reflected sample arm beam interferes with the reference arm beam;
step 60, the signal processor processes the interference information to realize OCT imaging.
As a further embodiment, the ophthalmoscope is a double-sided even aspherical lens, so that the focal plane of a scanning light path of a sample arm beam is in cambered surface focusing, and is closer to the physiological structure of human eyes and clearer.
Compared with the prior art, the invention has the beneficial effects that: an electric rotating wheel frame is added in a sample arm light path, the sample arm light path is controlled to be switched between the achromatic lens and the dichroic mirror through the electric rotating wheel frame, the test of the anterior ocular segment and the posterior ocular segment is respectively realized, the whole sample arm light path is not required to be switched, or a lens is additionally added in front of the OCT, the structure is simpler, the operation is more convenient, the occupied space is reduced, and the working efficiency is improved.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (6)
1. An anterior ocular segment OCT imaging device, comprising: the device comprises a light source, a deconcentrator, a sample arm, a reference arm and a signal processor, wherein the deconcentrator is connected with the signal processor, the sample arm comprises a first collimating lens, a scanning galvanometer, an electric rotating frame, a scanning lens and an ophthalmoscope, the scanning galvanometer comprises an X scanning galvanometer and a Y scanning galvanometer, and a light beam emitted by the light source is divided into a sample arm light beam and a reference arm light beam after passing through the deconcentrator;
the sample arm light beam sequentially passes through the first collimating lens, the scanning galvanometer, the electric rotating wheel frame, the scanning lens and the ophthalmoscope to reach human eyes and then is reflected back to the deconcentrator, an achromatic lens and a dichroic mirror are arranged on the electric rotating wheel frame, and the electric rotating wheel frame controls the sample arm light beam to be switched between the achromatic lens and the dichroic mirror so as to respectively realize real-time imaging of anterior ocular segment and posterior ocular segment;
the reference arm beam enters the reference arm and is reflected back to the deconcentrator.
2. The anterior ocular segment OCT imaging device of claim 1, wherein: the reference arm comprises a second collimating lens and a reflector, and the reference arm beam is collimated after passing through the second collimating lens and then reflected back to the deconcentrator after passing through the reflector.
3. The anterior ocular segment OCT imaging device of claim 1, wherein: the ophthalmoscope is a double-sided even aspherical lens.
4. An anterior ocular segment OCT imaging method, comprising:
the light beam emitted by the light source is divided into a sample arm light beam and a reference arm light beam after passing through the deconcentrator, the sample arm light beam enters the sample arm, and the reference arm light beam enters the reference arm;
an achromatic lens and a dichroic mirror are arranged on an electric rotating wheel frame in the sample arm, and the electric rotating wheel frame controls the sample arm beam to be switched between the achromatic lens and the dichroic mirror so as to respectively image the anterior ocular segment and the posterior ocular segment;
the sample arm beam is reflected back to the deconcentrator after being imaged;
the reference arm beam enters a reference arm and then is reflected back to the deconcentrator;
the reflected sample arm beam interferes with the reference arm beam;
the signal processor processes the interference information to realize OCT imaging.
5. The anterior ocular segment OCT imaging method of claim 4, wherein: the electric rotating wheel frame controls the sample arm beam to be switched between the achromatic lens and the dichroic mirror, so as to respectively realize real-time imaging of the anterior ocular segment and the posterior ocular segment, and the electric rotating wheel frame specifically comprises:
an motorized wheel carriage in the sample arm switches the sample arm beam to the achromat when testing the anterior ocular segment and the dichroic mirror when testing the posterior ocular segment.
6. The anterior ocular segment OCT imaging method of claim 4, wherein: the reference arm comprises a second collimating lens and a reflector, and the reference arm beam is collimated after passing through the second collimating lens and then reflected back to the deconcentrator after passing through the reflector.
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| CN201710404090.4A CN107137057B (en) | 2017-05-31 | 2017-05-31 | OCT imaging device and method for anterior ocular segment |
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| CN107137057B true CN107137057B (en) | 2023-10-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109124566B (en) * | 2018-08-13 | 2022-02-22 | 青岛市市立医院 | Ophthalmic imaging system with automatic retina feature detection |
| CN111272708A (en) * | 2020-01-22 | 2020-06-12 | 深圳湾实验室 | OCT imaging system |
| CN113483679B (en) * | 2021-07-06 | 2022-07-22 | 东北大学秦皇岛分校 | Contact lens parameter measuring device and method |
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