Ophthalmic treatment equipment

Abstract

The ophthalmic treatment equipment comprises a scanning detection module, a fixation optical module, an imaging observation module, a treatment optical path scanning module, a reflector I, a beam splitter prism I, a dichroscope I, a dichroscope II and a treatment objective lens, compared with an existing ophthalmology treatment device, the scanning detection module is arranged, the cornea can be scanned by a certain depth, cornea depth information is obtained, the cutting effect is ensured, and the risk that cutting needs to be conducted again due to the poor cutting effect is reduced.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, and in particular to an ophthalmic treatment device. Background Art

[0002] Femtosecond laser surgery has become the mainstream procedure for refractive correction, but the existing femtosecond laser refractive correction device can only observe the surface state of the cornea through an imaging device during the operation, and cannot obtain the depth information of the cornea. Therefore, it is impossible to judge the cutting effect after the corneal stromal lens cutting is completed and before the negative pressure is removed. After the negative pressure is removed, if it is found that the cutting effect is not good (for example, the side cutting of the lens is not cut through or the cap cutting is not cut through), the eye and the treatment device need to be realigned and the treatment is started again to repair the poor cutting. However, the position error caused by the realignment makes it impossible for the new processing center to be completely consistent with the first treatment, which leads to the failure of the operation. Summary of the invention

[0003] The present invention provides an ophthalmic treatment device, which can solve the problems pointed out in the background technology.

[0004] An ophthalmic treatment device, comprising:

[0005] A scanning detection module is used to perform a deep scan of the cornea to obtain cross-sectional morphological information of the corneal stroma lens;

[0006] Fixation light module, used to guide the patient's eye gaze;

[0007] Imaging observation module, used to observe the surgical process;

[0008] Treatment light path scanning module; and

[0009] A reflecting mirror, a beam splitting prism, a dichroic mirror, a dichroic mirror and a treatment objective lens;

[0010] Wherein, the reflector 1 is used to reflect the light beam emitted by the fixed light module to the treatment objective lens;

[0011] The beam splitter prism 1 is used to transmit a part of the fixation light and split the light of the treatment objective field of view to the imaging observation module;

[0012] The dichroic mirror 1 is used for reflecting the light emitted by the scanning detection block and transmitting the light emitted by the fixation light module;

[0013] The second dichroic mirror is used to reflect the laser pulses emitted by the treatment light path scanning module and transmit the light emitted by the fixation light module and the scanning detection module.

[0014] Preferably, the scanning detection module includes an OCT module, a collimating lens, an XY scanning galvanometer and an OCT scanning lens group.

[0015] Preferably, the fixation light module includes a fixation light source, an aperture and a focusing lens.

[0016] Preferably, the imaging observation module includes a camera, a surgical microscope, a transfer lens group, a second beam splitter prism, a second reflector, and an imaging relay lens group;

[0017] Among them, the second beam splitter prism divides the objective lens field of view into two paths, one of which is connected to the camera optical path, and the other is connected to the surgical microscope optical path.

[0018] Preferably, the treatment light path scanning module includes a femtosecond laser, a Z scanning module, an X / Y galvanometer and a relay mirror assembly.

[0019] Preferably, it further comprises a detection module, wherein the detection module is used to detect the optical characteristics of the light path.

[0020] Preferably, the dichroic mirror has a transmittance of >99% in the 400mm-750mm band and a reflectivity of >99% in the 1200mm-1400mm band.

[0021] Preferably, the transmittance of the dichroic mirror 2 in the 400mm-750mm band is greater than 99%, the transmittance in the 1200mm-1400mm band is greater than 99%, and the reflectivity in the 1000mm-1100mm band is greater than 99.5%.

[0022] Compared with the prior art, the beneficial effects of the present invention are: compared with the existing ophthalmic treatment equipment, the present invention is equipped with a scanning detection module, which can scan the cornea to a certain depth and obtain corneal depth information, thereby ensuring the cutting effect and reducing the risk of needing to cut again due to poor cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the scanning detection module;

[0025] Figure 3 It is a structural schematic diagram of the fixation light module;

[0026] Figure 4 It is a structural schematic diagram of the imaging observation module;

[0027] Figure 5 This is a structural schematic diagram of the treatment light path scanning module.

[0028] Description of reference numerals:

[0029] 1- scanning detection module, 2- fixation light module, 3- imaging observation module, 4- treatment light path scanning module, 5- reflector 1, 6- beam splitter prism 1, 7- dichroic mirror 1, 8- dichroic mirror 2, 9- treatment objective lens, 10- OCT module, 11- collimating lens, 12- XY scanning lens, 13- OCT scanning lens group, 14- fixation light source, 15- aperture, 16- focusing lens, 17- camera, 18- camera objective lens, 19- beam splitter prism 2, 20- reflector 2, 21- imaging relay lens group, 22- surgical microscope, 23- femtosecond laser, 24- detection module, 25- Z scanning module, 26- X / Y galvanometer, 27- relay lens group. DETAILED DESCRIPTION

[0030] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0031] like Figures 1 to 5 As shown, an ophthalmic treatment device provided by an embodiment of the present invention includes a scanning detection module 1, a fixation light module 2, an imaging observation module 3, a treatment light path scanning module 4, a reflector 1 5, a beam splitter prism 1 6, a dichroic mirror 1 7, a dichroic mirror 2 8 and a treatment objective lens 9;

[0032] Among them, the reflector 1 5 is used to change the direction of the light path and reflect the light beam emitted by the fixed light module to the treatment objective lens 9;

[0033] The beam splitter prism 6 is used to transmit a part of the fixation light and split the field light of the treatment objective lens 9 to the imaging observation module 3;

[0034] The dichroic mirror 1 7 is used to reflect the light emitted by the scanning detection block and transmit the light emitted by the fixation light module 2;

[0035] The second dichroic mirror 8 is used to reflect the laser pulses emitted by the treatment light path scanning module 4 and transmit the light emitted by the fixation light module 2 and the scanning detection module 1;

[0036] The dichroic mirror 7 has high transmittance in the visible light band and high reflectance in the OCT light source band, with a transmittance of >99% in the 400mm-750mm band and a reflectance of >99% in the 1200mm-1400mm band.

[0037] The dichroic mirror 28 has high transmittance to visible light and OCT light source bands, and high reflectance to therapeutic light source bands, that is, the transmittance in the 400mm-750mm band is >99%, the transmittance in the 1200mm-1400mm is >99%, and the reflectance in the 1000mm-1100mm band is >99.5%.

[0038] like Figure 2As shown, the scanning detection module 1 is used to scan the cornea at a certain depth to provide cross-sectional morphological information of the corneal stroma lens. The scanning detection module 1 includes:

[0039] OCT module 10 and reference arm optical path;

[0040] The collimating lens 11 collimates the divergent light beam emitted by the optical fiber of the detection arm into parallel light, so as to compress the divergence angle and provide a certain beam diameter;

[0041] XY scanning lens 12, used to change the direction of the light beam to produce a certain scanning field of view;

[0042] The OCT scanning lens group 13 is used to cooperate with the treatment objective lens 9 to form a complete OCT scanning optical path and focus the light beam to achieve a certain resolution;

[0043] like Figure 3 As shown, the fixation light module 2 is used to guide the patient's eye gaze and improve the alignment accuracy between the eye and the treatment device; the fixation light module 2 includes:

[0044] The fixation light source 14 is used to provide illumination and illuminate the aperture 15, so that the patient can observe the target. The fixation light source 14 is a green light source with a wavelength of 532nm;

[0045] Aperture 15, used as the patient's observation target, guiding the patient's gaze to improve the alignment accuracy between the human eye and the treatment light path;

[0046] The focusing lens 16 is used to project the image of the aperture 15 into the human eye, so that the human eye can observe clearly. The focusing lens 16 can also change the focal length of the optical path to provide a diopter adjustment function, so that patients with different diopters can clearly observe the fixation point. The focusing lens 16 can be realized by changing the position of the lens through a motor;

[0047] like Figure 4 As shown, the imaging observation module 3 is used to observe the alignment process of the eye and the treatment device and the surgical process. The imaging observation module 3 includes:

[0048] Camera 17, which may be a CCD camera 17 or a CMOS camera 17;

[0049] The camera objective lens 18 images the field of view of the objective lens onto the photosensitive target surface of the camera 17;

[0050] The second beam splitter prism 19 divides the field of view of the objective lens into two paths, one path is recorded by the camera 17, and the other path is transferred to the optical path of the surgical microscope 22, that is, one path is connected to the optical path of the camera 17, and the other path is connected to the optical path of the surgical microscope 22. The operator can align the human eye with the equipment and observe the surgical process through the eyepiece of the surgical microscope 22 or an external high-definition display;

[0051] The second reflector 20 is used to fold the optical path and reduce the volume of the system. This is an existing structure and will not be described in detail here.

[0052] An imaging relay lens group 21 is used to image the field of view of the objective lens in the intermediate optical path to facilitate subsequent optical system processing;

[0053] like Figure 5 As shown, the treatment light path scanning module 4 is used to cut a lens of a certain shape inside the cornea to correct refractive errors; the treatment light path scanning module 4 includes:

[0054] A femtosecond laser 23, used to provide laser pulses with short pulse width and high peak power;

[0055] Detection module 24, used to detect the optical properties of the optical path, such as energy, pulse width, power, stability, etc.;

[0056] A Z scanning module 25 is used to change the focusing depth of the light beam inside the human cornea to achieve cutting of tissues at different depths;

[0057] X / Y galvanometer 26, used to change the direction of the light beam to produce a certain scanning field of view;

[0058] The relay mirror group 27 is used for pupil telecentric imaging to achieve high-precision alignment of a large-field scanning light beam between different mirror groups.

[0059] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit and essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0060] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An ophthalmic treatment device, characterized in that: include: A scanning detection module is used to perform a deep scan of the cornea to obtain cross-sectional morphological information of the corneal stroma lens; Fixation light module, used to guide the patient's eye gaze; Imaging observation module, used to observe the surgical process; Treatment light path scanning module; and A reflecting mirror, a beam splitting prism, a dichroic mirror, a dichroic mirror and a treatment objective lens; Wherein, the reflector 1 is used to reflect the light beam emitted by the fixed light module to the treatment objective lens; The beam splitter prism 1 is used to transmit a part of the fixation light and split the light of the treatment objective field of view to the imaging observation module; The dichroic mirror 1 is used for reflecting the light emitted by the scanning detection block and transmitting the light emitted by the fixation light module; The second dichroic mirror is used to reflect the laser pulses emitted by the treatment light path scanning module and transmit the light emitted by the fixation light module and the scanning detection module.

2. An ophthalmic treatment device according to claim 1, characterized in that: The scanning detection module includes an OCT module, a collimating lens, an XY scanning galvanometer and an OCT scanning lens group.

3. An ophthalmic treatment device according to claim 1, characterized in that: The fixation light module comprises a fixation light source, an aperture and a focusing lens.

4. An ophthalmic treatment device according to claim 1, characterized in that: The imaging observation module includes a camera, a surgical microscope, a transfer lens group, a second beam splitter prism, a second reflector, and an imaging relay lens group; Among them, the second beam splitter prism divides the objective lens field of view into two paths, one of which is connected to the camera optical path, and the other is connected to the surgical microscope optical path.

5. An ophthalmic treatment device according to claim 1, characterized in that: The treatment optical path scanning module includes a femtosecond laser, a Z scanning module, an X / Y galvanometer and a relay mirror group.

6. An ophthalmic treatment device according to claim 5, characterized in that: It also includes a detection module, which is used to detect the optical characteristics of the light path.

7. An ophthalmic treatment device according to claim 1, characterized in that: The dichroic mirror has a transmittance of >99% in the 400mm-750mm band and a reflectivity of >99% in the 1200mm-1400mm band.

8. An ophthalmic treatment device according to claim 1, characterized in that: The transmittance of the dichroic mirror 2 in the 400mm-750mm band is greater than 99%, the transmittance in the 1200mm-1400mm band is greater than 99%, and the reflectivity in the 1000mm-1100mm band is greater than 99.5%.

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