CN107137057A - A kind of anterior ocular segment OCT image device and method - Google Patents

Abstract

The invention discloses an anterior segment OCT imaging device and method. The device comprises: a light source, a line splitter, a sample arm, a reference arm and a signal processor, the line splitter is connected with the signal processor, and the sample arm includes a first collimator Lens, scanning galvanometer, motorized turret, scanning lens and ophthalmoscope. The scanning galvanometer includes X scanning galvanometer and Y scanning galvanometer. The light beam emitted by the light source is divided into sample arm beam and reference arm beam after passing through the splitter ; The electric turret controls the beam of the sample arm to switch between the achromatic lens and the dichroic mirror to realize real-time imaging of the anterior segment and the posterior segment of the eye respectively; the beam of the reference arm enters the reference arm and is reflected back to the splitter. The OCT imaging device and method of the anterior segment of the present invention add an electric runner frame to the optical path of the sample arm, and the electric wheel frame controls the optical path of the sample arm to switch between the achromatic lens and the dichroic mirror, respectively realizing the imaging of the anterior segment and the eye. The test in the latter section has a simpler structure and easier operation.

Description

An anterior segment OCT imaging device and method

technical field

The invention relates to the technical field of medical imaging, in particular to an anterior segment OCT imaging device and method.

Background technique

OCT, also known as optical correlation tomography, is an imaging technology developed rapidly in the past decade. It uses the basic principle of weakly coherent light interferometer to detect the back reflection or several times of incident weakly coherent light at different depths of biological tissue. Scattering signals can be scanned to obtain two-dimensional or three-dimensional structural images of biological tissues. When the existing anterior segment OCT imaging device scans, it is necessary to switch the main scanning optical path of the OCT, or add an additional lens in front of the OCT, which is complicated to operate and takes up a lot of space.

Contents of the invention

In view of the deficiencies of the prior art, one of the objectives of the present invention is to provide an anterior segment OCT imaging device with simple structure, simple operation and space saving.

The second object of the present invention is to provide an anterior segment OCT imaging method that does not need to switch the optical path of the entire sample arm and is easy to operate.

One of purpose of the present invention adopts following technical scheme to realize:

An anterior segment OCT imaging device, a light source, a line splitter, a sample arm, a reference arm and a signal processor, the line splitter is connected to the signal processor, and the sample arm includes a first collimating lens, a scanning galvanometer, a motorized rotary A wheel frame, a scanning lens and an ophthalmoscope, the scanning galvanometer includes an X scanning galvanometer and a Y scanning galvanometer, and the light beam emitted by the light source is divided into a sample arm beam and a reference arm beam after passing through the line splitter;

The light beam of the sample arm passes through the first collimating lens, the scanning galvanometer, the motorized turret, the scanning lens and the ophthalmoscope to reach the human eye, and then reflects back to the splitter, so The electric turret is provided with an achromatic lens and a dichroic mirror, and the electric turret controls the light beam of the sample arm to switch between the achromatic lens and the dichroic mirror, respectively realizing the anterior segment and the dichroic mirror. Real-time imaging of the posterior segment of the eye;

The light beam of the reference arm enters the reference arm and is reflected back to the splitter.

Further, the reference arm includes a second collimator lens and a reflector, and the light beam of the reference arm is collimated after passing through the second collimator lens, and then reflected back to the splitter after passing through the reflector.

Further, the ophthalmoscope is a double-sided even-order aspheric lens.

Two of the purpose of the present invention adopts following technical scheme to realize:

An anterior segment OCT imaging method, comprising:

The light beam emitted by the light source is divided into the sample arm beam and the reference arm beam after passing through the splitter, the sample arm beam enters the sample arm, and the reference arm beam enters the reference arm;

The electric turret in the sample arm controls the light beam of the sample arm to switch between the achromatic lens and the dichroic mirror, respectively realizing the imaging of the anterior segment and the posterior segment;

The light beam of the sample arm is reflected back to the splitter after imaging;

The light beam of the reference arm enters the reference arm and is reflected back to the splitter;

The reflected sample arm beam interferes with the reference arm beam;

The signal processor realizes OCT imaging after processing the interference information.

Further, the electric turret controls the light beam of the sample arm to switch between the achromatic lens and the dichroic mirror, respectively realizing real-time imaging of the anterior segment and the posterior segment, specifically including:

When testing the anterior segment, the motorized turret in the sample arm switches the sample arm beam to the achromatic lens, and when testing the posterior segment, the motorized turret in the sample arm switches the sample arm beam to the dichroic mirror.

Further, the reference arm includes a second collimating lens and a reflector, and the beam of the reference arm is collimated after passing through the second collimating lens, and then reflected back to the splitter after passing through the reflector.

Compared with the prior art, the beneficial effect of the present invention is that: an electric turret is added to the optical path of the sample arm, and the optical path of the sample arm is controlled by the electric turret to switch between the achromatic lens and the dichroic mirror, respectively. For the test of the anterior segment and the posterior segment, there is no need to switch the optical path of the entire sample arm, or add an additional lens in front of the OCT. The structure is simpler, the operation is more convenient, the space occupied is reduced, and the work efficiency is improved.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

1 is a schematic diagram of an anterior segment OCT imaging device in an embodiment of the present invention;

Fig. 2 is a schematic diagram of an electric runner frame in an embodiment of the present invention;

Fig. 3 is a schematic diagram of an anterior segment OCT imaging method in an embodiment of the present invention.

In the figure: 10, light source; 20, splitter; 30, sample arm; 31, first collimating lens; 32, scanning galvanometer; 33, electric wheel turret; 331, achromatic lens; 332, dichroic mirror ; 34, scanning lens; 35, ophthalmoscope; 36, human eye; 40, reference arm; 41, second collimating lens; 42, mirror; 50, signal processor.

detailed description

Below, in conjunction with accompanying drawing and specific embodiment, the present invention is described further:

As shown in Figure 1-2, it is an anterior segment OCT imaging device in the embodiment of the present invention, including light source 10, line splitter 20, sample arm 30, reference arm 40 and signal processor 50, line splitter 20 and signal processor 50 connection, the sample arm 30 includes a first collimator lens 31, a scanning galvanometer 32, a motorized rotator frame 33, a scanning lens 34 and an ophthalmoscope 35, and the scanning galvanometer 32 includes an X scanning galvanometer and a Y scanning galvanometer, and the motorized rotation The frame 33 is provided with an achromatic lens 331 and a dichroic mirror 332. The reference arm 40 includes a second collimating lens 41 and a mirror 42. The light beam emitted by the light source 10 is divided into the sample arm light beam and the reference arm light beam after passing through the line splitter 20. .

The optical path of the beam of the sample arm is as follows: the beam of the sample arm passes through the first collimating lens 31, the scanning galvanometer 32, the motorized turret 33, the scanning lens 34 and the ophthalmoscope 35 to reach the human eye 36, and then reflects back to the splitter 20, and the motorized rotatable The frame 33 controls the sample arm beam to switch between the achromatic lens 331 and the dichroic mirror 332, wherein, when testing the anterior segment, the motorized rotator frame 33 switches the sample arm beam to the achromatic lens 331, and when testing the posterior segment of the eye , the motorized turret 33 switches the light beam of the sample arm to the dichroic mirror 332 to realize real-time imaging of the anterior segment and the posterior segment respectively;

The optical path of the reference arm beam is as follows: the reference arm beam is collimated after passing through the second collimating lens 41, and then reflected back to the splitter 20 through the mirror 42;

The reflected beam of the sample arm interferes with the beam of the reference arm, and the signal processor 50 processes the interference information to realize OCT imaging.

As a further embodiment, the ophthalmoscope 35 is a double-sided even-order aspheric lens, which makes the focal plane of the scanning optical path of the beam of the sample arm arc focused, which is closer to the physiological structure of the human eye and clearer.

As shown in Figure 3, it is an anterior segment OCT imaging method in an embodiment of the present invention, including:

Step 10, the light beam emitted by the light source is divided into the sample arm beam and the reference arm beam after passing through the splitter, the sample arm beam enters the sample arm, and the reference arm beam enters the reference arm;

Wherein, the sample arm includes a first collimating lens, a scanning galvanometer, a motorized turret, a scanning lens and an ophthalmoscope, and the reference arm includes a second collimating lens and a mirror.

Step 20, the electric turret in the sample arm controls the light beam of the sample arm to switch between the achromatic lens and the dichroic mirror, respectively realizing the test on the anterior segment and the posterior segment;

Specifically, the light beam of the sample arm passes through the first collimator lens, the scanning galvanometer, the motorized turret, the scanning lens and the ophthalmoscope to reach the human eye in sequence. The scanning galvanometer includes the X scanning galvanometer and the Y scanning galvanometer, and Equipped with an achromatic lens and a dichroic mirror, when testing the anterior segment, the motorized turret in the sample arm switches the beam of the sample arm to the achromatic lens, and when testing the posterior segment, the motorized rotator in the sample arm Switch the sample arm beam to the dichroic mirror.

Step 30, the light beam of the sample arm is reflected back to the splitter after the test;

Step 40, the light beam of the reference arm enters the reference arm and is reflected back to the splitter;

Specifically, the light beam of the reference arm is collimated after passing through the second collimating lens, and then reflected back to the splitter after passing through the mirror.

Step 50, interference occurs between the reflected beam of the sample arm and the beam of the reference arm;

Step 60, the signal processor processes the interference information to realize OCT imaging.

As a further embodiment, the ophthalmoscope is a double-sided even-order aspheric lens, so that the focal plane of the scanning optical path of the beam of the sample arm is focused on a curved surface, which is closer to the physiological structure of the human eye and clearer.

Compared with the prior art, the beneficial effect of the present invention is that: an electric turret is added to the optical path of the sample arm, and the optical path of the sample arm is controlled by the electric turret to switch between the achromatic lens and the dichroic mirror, respectively. For the test of the anterior segment and the posterior segment, there is no need to switch the optical path of the entire sample arm, or add an additional lens in front of the OCT. The structure is simpler, the operation is more convenient, the space occupied is reduced, and the work efficiency is improved.

The above-mentioned embodiment is only a preferred embodiment of the present invention, and cannot be used to limit the protection scope of the present invention. Any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of the present invention. Scope of protection claimed.

Claims (6)

1. An anterior segment OCT imaging device is characterized in that comprising: light source, line splitter, sample arm, reference arm and signal processor, line splitter is connected with signal processor, and described sample arm comprises the first collimating lens , a scanning vibrating mirror, a motorized wheel frame, a scanning lens and an ophthalmoscope, the scanning vibrating mirror includes an X scanning vibrating mirror and a Y scanning vibrating mirror, the light beam emitted by the light source is divided into the sample arm beam and the reference arm beam; The light beam of the sample arm passes through the first collimating lens, the scanning galvanometer, the motorized turret, the scanning lens and the ophthalmoscope to reach the human eye, and then reflects back to the splitter, so The electric turret is provided with an achromatic lens and a dichroic mirror, and the electric turret controls the light beam of the sample arm to switch between the achromatic lens and the dichroic mirror, respectively realizing the anterior segment and the dichroic mirror. Real-time imaging of the posterior segment of the eye; The light beam of the reference arm enters the reference arm and is reflected back to the splitter. 2. the anterior segment OCT imaging device as claimed in claim 1, is characterized in that: described reference arm comprises the second collimating lens and mirror, and described reference arm light beam is collimated after passing through described second collimating lens, then passes through The reflector is then reflected back to the splitter. 3. The anterior segment OCT imaging device according to claim 1, wherein the ophthalmoscope is a double-sided even-order aspheric lens. 4. An anterior segment OCT imaging method, characterized in that it comprises: The light beam emitted by the light source is divided into the sample arm beam and the reference arm beam after passing through the splitter, the sample arm beam enters the sample arm, and the reference arm beam enters the reference arm; The electric turret in the sample arm controls the light beam of the sample arm to switch between the achromatic lens and the dichroic mirror, respectively realizing the imaging of the anterior segment and the posterior segment; The light beam of the sample arm is reflected back to the line splitter after imaging; The light beam of the reference arm enters the reference arm and is reflected back to the splitter; The reflected sample arm beam interferes with the reference arm beam; The signal processor realizes OCT imaging after processing the interference information. 5. The OCT imaging method of the anterior segment as claimed in claim 4, characterized in that: the electric turret controls the light beam of the sample arm to switch between the achromatic lens and the dichroic mirror, respectively realizing the imaging of the anterior segment and real-time imaging of the posterior segment of the eye, including: When testing the anterior segment, the motorized turret in the sample arm switches the beam of the sample arm to the achromatic lens, and when testing the posterior segment, the motorized turret in the sample arm switches the beam of the sample arm to the achromatic lens. The sample arm beam is switched to the dichroic mirror. 6. the anterior segment OCT imaging method as claimed in claim 4, is characterized in that: described reference arm comprises the second collimating lens and mirror, and described reference arm light beam is collimated after passing through described second collimating lens, then passes through The reflector is then reflected back to the splitter.