Variable resolution OCT surgical microscope

Abstract

The utility model discloses a kind of OCT operating microscopes of variable resolution, including eyepiece module, image conversion prism module, camera module, illumination module, OCT scanning module, objective lens module and OCT host computer, also include resolution switching module, the resolution switching module is used to change beam entrance pupil diameter, to change the numerical aperture of scanning optical path, realize resolution dynamic adjustable;The utility model increases resolution switching module in sample arm optical path, focusing is carried out by manual or electric displacement stage, can dynamically change the numerical aperture of reference arm objective lens and scanning field of view without affecting focal plane, realize the high-low switching of lateral resolution;Without affecting scanning speed, reach the effect of large field of view finding target and small field of view fine observation.

Description

TECHNICAL FIELD

[0001] The utility model relates to ophthalmic microscope technical field, especially in a kind of OCT operating microscope of variable resolution. BACKGROUND

[0002] The lateral resolution of current OCT operating microscope is fixed, in order to realize fast real-time imaging, while having certain observation field of view, lateral resolution usually cannot reach very high. User finds target in larger field of view, cannot observe target with higher resolution by switching small field of view. To limit the further observation of user to target details. SUMMARY

[0003] The utility model provides a kind of OCT operating microscope of variable resolution, can solve the problem that part of microscope in prior art cannot realize lateral resolution adjustable.

[0004] A kind of OCT operating microscope of variable resolution, including eyepiece module, image rotating prism module, camera module, illumination module, OCT scanning module, objective lens module and OCT host computer, still include resolution switching module, the resolution switching module is used to change beam entrance pupil diameter, to change the numerical aperture of scanning light path, realize dynamic adjustable resolution.

[0005] Preferably, the resolution switching module includes a rotating body and a plurality of fixed magnification lens groups mounted on the rotating body, the axis of the plurality of fixed magnification lens groups, the optical axis and the rotation center line of the rotating body intersect at the same point.

[0006] Preferably, the rotating body is rotatably disposed in the housing of the operating microscope, and the operating microscope further comprises a driving component for driving the rotating body to rotate.

[0007] Preferably, the driving component is a rotating handle, the axis of the rotating handle coincides with the center line of the rotating body, one end of the rotating handle extends into the housing of the operating microscope and is connected with the rotating body, and a through hole is formed in the housing of the operating microscope and matched with the rotating handle.

[0008] Preferably, the resolution switching module includes a fixed lens group, a focusing lens group, a compensation lens group and an electric displacement table arranged along the optical path, wherein the focusing lens group and the compensation lens group are mounted on the electric displacement table, and the electric displacement table is used to change the distance between the focusing lens group, the compensation lens group and the fixed lens group.

[0009] Preferably, the OCT host computer includes a spectrometer module, a fiber-coupled interference module, a reference arm module, a sample arm module, a light source module and a data acquisition and control module, and the data acquisition and control module is connected with the reference arm module, the light source module, the spectrometer module and the OCT scanning module.

[0010] The light source module emits a light beam to the optical fiber coupling interference module, the light beam is divided into the reference arm module and the sample arm module through the light source coupling interference module, the light beam entering the reference arm module is reflected back to the optical fiber coupling interference module, the light beam entering the sample arm module passes through the collimating lens, the resolution switching module, the galvanometer group, is reflected into the objective lens and is imaged on the anterior segment of the eye, the light beam carrying the information of the anterior segment of the eye returns to the optical fiber coupling module along the original path, the spectral information is collected through the spectrometer, and finally is sent to the data acquisition and control module.

[0011] Preferably, the electric displacement table is driven by a stepping motor or a linear motor.

[0012] Preferably, the electric displacement table is connected with the data acquisition and control module, the electric displacement table can receive the control instruction sent by the data acquisition and control module and realize the adjustment of the resolution.

[0013] Compared with the prior art, the utility model discloses a resolution switching module in the sample arm light path, and through manual or electric displacement table focusing, the numerical aperture and scanning field of view of the reference arm objective lens can be dynamically changed without affecting the focal plane, and the high and low switching of the lateral resolution is realized. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure diagram of the utility model's structure diagram of OCT host computer;

[0015] Figure 2 It is the structure diagram of the utility model's structure diagram of OCT host computer;

[0016] Figure 3 It is the structure diagram of the resolution switching module of embodiment two;

[0017] Figure 4 It is the structure diagram of the resolution switching module of embodiment three.

[0018] BRIEF DESCRIPTION OF DRAWINGS

[0019] 1-ocular module, 2-converts image prism module, 3-camera module, 4-resolution switching module, 5-illumination module, 6-OCT scanning module, 7-objective lens module, 8-OCT host computer, 9-spectrometer module, 10-optical fiber coupling interference module, 11-reference arm module, 12-sample arm module, 13-light source module, 14-data acquisition and control module, 15-collimating lens, 16-galvanometer group, 17-rotary body, 18-constant magnification mirror group, 19-fixed mirror group, 20-focusing mirror group, 21-compensation mirror group, 22-electric displacement table. DETAILED DESCRIPTION

[0020] One specific embodiment of the present application will be described in detail below with reference to the drawings, but it should be understood that the scope of protection of the present application is not limited by the specific embodiment.

[0021] As shown in the figure, the utility model discloses an OCT operating microscope of variable resolution, which comprises an eyepiece module 1, a turning prism module 2, a camera module 3, a resolution switching module 4, an illumination module 5, an OCT scanning module 6, an objective lens module 7 and an OCT host 8. Figures 1 to 2

[0022] The eyepiece module 1 can have adjustable pupil distance and adjustable diopter function, which is convenient for users with different vision and pupil distance to observe and use.

[0023] The turning prism module 2 is used for converting the inverted image formed by the objective lens into a positive image, so that the orientation of the image observed by the user is consistent with the position below the objective lens.

[0024] The camera module 3 images the image below the objective lens to a high-resolution CMOS target surface, so that the user can observe the image below the objective lens through an external high-definition display screen.

[0025] The OCT scanning module 6 can obtain the internal information of the target tissue below the objective lens.

[0026] After the user observes the target inside the tissue under a large field of view, the high-resolution mode can be switched, so that the target can be observed more finely. At the same time, since the field of view is switched to a small field of view, the real-time imaging speed of the OCT is not affected.

[0027] The resolution switching module 4 is used for changing the diameter of the beam entrance pupil, so as to change the numerical aperture of the scanning light path, and realize dynamic adjustable resolution.

[0028] The OCT host 8 comprises a spectrometer module 9, a fiber-coupled interference module 10, a reference arm module 11, a sample arm module 12, a light source module 13 and a data acquisition and control module 14. The data acquisition and control module 14 is connected with the reference arm module 11, the light source module 13, the spectrometer module 9 and the OCT scanning module 6. The data acquisition and control module 14 can realize synchronous control of the light source module 13, the spectrometer module 9 and the galvanometer group 16, convert the collected data into depth information at different positions and output images.

[0029] ​The light source module 13 emits a light beam to the fiber-coupled interference module 10. The light source coupling interference module splits the light beam into the reference arm module 11 and the sample arm module 12. The light beam entering the reference arm module 11 is reflected back to the fiber-coupled interference module 10. The light beam entering the sample arm module 12 passes through the collimating lens 15, the resolution switching module 4, and the galvanometer group 16. It is reflected into the objective lens and imaged on the anterior segment of the eye. The light beam carrying the information of the anterior segment of the eye returns to the fiber coupling module along the original path. The spectrometer collects spectral information and finally sends it to the data acquisition and control module.

[0030] During operation, the user can send control commands through the data acquisition and control module 14 to change the focusing lens inside the resolution switching module 4, thereby achieving the switching between high and low resolution.

[0031] Example 2

[0032] like Figure 3 As shown, based on Embodiment 1, this embodiment proposes a variable resolution OCT surgical microscope. Its resolution switching module 4 includes a rotating body 17 and multiple fixed magnification lens groups 18 mounted on the rotating body 17. The axis and optical axis of the multiple fixed magnification lens groups 18 intersect the rotation center line of the rotating body 17 at the same point.

[0033] In this embodiment, the rotating body 17 is rotatably disposed inside the housing of the surgical microscope, and the surgical microscope is also provided with a driving component for driving the rotating body 17 to rotate.

[0034] The driving component is a rotating handle (not shown in the figure). The axis of the rotating handle coincides with the center line of the rotating body 17. One end of the rotating handle extends into the housing of the surgical microscope and is connected to the rotating body 17. The housing of the surgical microscope has a through hole that mates with the rotating handle.

[0035] In other embodiments, the driving component may be a motor, the output shaft of which is connected to the rotating body 17. The rotating body 17 is driven by the motor to rotate, thereby aligning the center line of one of the multiple fixed magnification lens groups 18 with the optical axis. The motor is connected to the data acquisition and control module 14, thereby enabling the switching of the multiple fixed magnification lens groups 18.

[0036] Example 3

[0037] like Figure 4As shown, based on Embodiment 1, this embodiment proposes a variable resolution OCT surgical microscope. The resolution switching module 4 of this embodiment includes a fixed lens group 19, a focusing lens group 20, a compensating lens group 21 and an electric displacement stage 22 arranged along the optical path. The focusing lens group 20 and the compensating lens group 21 are mounted on the electric displacement stage 22, which is used to change the distance between the focusing lens group 20 and the compensating lens group 21 and the fixed lens group 19.

[0038] The electric displacement stage 22 is driven by a stepper motor or a linear motor;

[0039] The electric displacement stage 22 is connected to the data acquisition and control module 14. The electric displacement stage 22 can receive control commands issued by the data acquisition and control module 14 and adjust the resolution.

[0040] The fixed lens group 19 focuses the light with a fixed optical power, the focusing lens group 20 is used to dynamically change the divergence angle of the emitted light, thereby achieving the effect of adjustable magnification, and the compensation lens group 21 is used to collimate the diverging beam, thereby ensuring that the OCT scanning plane is in focus at all magnifications. When the electric displacement stage 22 receives the control command issued by the data acquisition and control module 14 and moves according to the specified path, the numerical aperture can be continuously adjusted, thereby dynamically and continuously changing the lateral resolution of the OCT module.

[0041] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit and essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A variable resolution OCT surgical microscope, comprising an eyepiece module, an image-rotating prism module, a camera module, an illumination module, an OCT scanning module, an objective lens module, and an OCT main unit, characterized in that, It also includes a resolution switching module, which is used to change the diameter of the beam entrance pupil, thereby changing the numerical aperture of the scanning optical path and realizing dynamic adjustment of the resolution; The resolution switching module includes a rotating body and multiple fixed magnification lens groups mounted on the rotating body. The axis and optical axis of the multiple fixed magnification lens groups intersect the rotation center line of the rotating body at the same point. The rotating body is rotatably disposed inside the housing of the surgical microscope, and the surgical microscope is also provided with a drive component for driving the rotating body to rotate. The driving component is a rotating handle. The axis of the rotating handle coincides with the center line of the rotating body. One end of the rotating handle extends into the housing of the surgical microscope and is connected to the rotating body. The housing of the surgical microscope has a through hole that mates with the rotating handle. The resolution switching module includes a fixed lens group, a focusing lens group, a compensating lens group, and an electric displacement stage arranged along the optical path. The focusing lens group and the compensating lens group are mounted on the electric displacement stage, which is used to change the distance between the focusing lens group, the compensating lens group, and the fixed lens group. The OCT host includes a spectrometer module, a fiber-coupled interferometer module, a reference arm module, a sample arm module, a light source module, and a data acquisition and control module. The data acquisition and control module is connected to the reference arm module, the light source module, the spectrometer module, and the OCT scanning module. The light source module emits a beam to the fiber-coupled interferometer module, which then splits the beam into the reference arm module and the sample arm module. The beam entering the reference arm module is reflected back to the fiber-coupled interferometer module, while the beam entering the sample arm module passes through the collimating lens, resolution switching module, and galvanometer group. It is then reflected into the objective lens and imaged on the anterior segment of the eye. The beam carrying the information from the anterior segment returns along the original path to the fiber-coupled interferometer module, where spectral information is acquired by the spectrometer and finally sent to the data acquisition and control module.

2. The variable resolution OCT surgical microscope as described in claim 1, characterized in that, The electric displacement stage is driven by a stepper motor or a linear motor.

3. The variable resolution OCT surgical microscope as described in claim 1, characterized in that, The electric displacement stage is connected to the data acquisition and control module, and the electric displacement stage can receive control commands issued by the data acquisition and control module and adjust the resolution.

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