CN106389004A - Laser adapter with continuously adjustable light spots and fundus laser therapeutic instrument - Google Patents

Abstract

The invention is suitable for the technical field of medical equipment, and provides a laser adapter with continuously adjustable light spots, which comprises an input optical fiber, and an imaging lens group, a collimating lens and a focusing lens which are arranged on a laser output light path of the input optical fiber; the imaging lens group images the laser to form a first light spot with energy distribution being flat-top distribution, an object space focal plane of the collimating lens coincides with the first light spot, the focusing lens focuses parallel light beams output by the collimating lens on the light receiving surface to form a second light spot, and the second light spot is continuously adjustable through the linkage of the imaging lens group and the collimating lens. According to the invention, the laser is imaged into the first light spots distributed in a flat-top manner through the imaging lens group, and the energy distribution states of the second light spots and the first light spots are basically consistent, so that the light spots have uniform energy, clear and sharp edges, real and reliable sizes, and the treatment effect is obviously improved; continuous change of the size of the second light spot is achieved through linkage of the imaging lens group and the collimating lens, the treatment area is convenient to change according to the actual pathological change condition, and the treatment effect and efficiency are improved.

Description

A continuously adjustable laser adapter and fundus laser therapy instrument

technical field

The invention belongs to the technical field of medical devices, in particular to a laser adapter with continuously adjustable light spots and a fundus laser treatment instrument.

Background technique

The fundus laser therapy instrument irradiates laser light to the fundus, and the fundus tissue absorbs the energy of the laser to heat up, denature and solidify the protein in the tissue, and achieve the purpose of treating various fundus diseases. At present, it is mainly used clinically to treat central serous chorioretinopathy, retinal hole, retinal detachment, diabetic retinopathy, age-related macular degeneration, retinal vein occlusion, retinal vasculitis, retinal tumor and other fundus diseases.

The laser adapter is the main optical transmission system of the fundus laser therapy instrument. It is usually used in conjunction with the slit lamp microscope, and its performance directly affects the quality of the light spot on the fundus. In the prior art, the laser adapter with a continuously variable spot generally has a Gaussian distribution, the center is bright and the edge is dark. During treatment, the tissue in the center of the spot will be overheated, while the tissue at the edge of the spot does not achieve the therapeutic effect, resulting in uneven treatment.

Contents of the invention

The object of the present invention is to provide a laser adapter with continuously adjustable light spot, aiming to make the energy of the laser spot irradiated to the fundus uniform, the edge clear, and improve the treatment effect.

The present invention is achieved in this way, a laser adapter with continuously adjustable spot, including an input optical fiber and an imaging lens group, a collimating mirror and a focusing mirror arranged on the laser output optical path of the input optical fiber; The laser imaging forms a first light spot whose energy distribution is a flat-top distribution, the object focal plane of the collimating mirror coincides with the first light spot, and the focusing mirror focuses the parallel light beam output by the collimating mirror A second light spot is formed on the light-receiving surface, and the imaging lens group and the collimating lens can move along a direction parallel to the light path, so that the second light spot can be continuously adjusted.

Another object of the present invention is to provide a fundus laser therapy instrument, including a laser light source and a laser adapter for transmitting laser light to the lesion, the laser adapter includes an input optical fiber and a laser output optical path arranged on the input optical fiber An imaging lens group, a collimating mirror, and a focusing mirror; the laser beam passes through the imaging lens group to form a first light spot whose energy distribution is a flat-top distribution, and the object focal plane of the collimating mirror coincides with the first light spot , the focusing mirror focuses the parallel light beam output by the collimating mirror on the lesion to form a second spot, and the imaging lens group and collimating mirror can move along the direction parallel to the optical path, so that the second spot is continuous adjustable.

The laser adapter provided by the present invention images the output laser light of the input fiber into a first light spot through the imaging lens group, and the first light spot is basically consistent with the energy distribution at the output end face of the input fiber, both of which are flat-top distributions, and then the collimator and The focusing mirror forms the second spot, which has basically the same energy distribution state as the first spot. The spot energy is uniform, the edge is clear and sharp, the size is real and reliable, and the treatment effect is significantly improved; the second spot is realized through the linkage of the imaging lens group and the collimator The continuous change in size makes it easier to change the treatment area according to the actual lesion situation, improving the treatment effect and efficiency.

Description of drawings

Fig. 1 is a schematic structural diagram of a laser adapter with continuously adjustable spot provided by an embodiment of the present invention;

Fig. 2 is another structural schematic diagram of the laser adapter with continuously adjustable spot provided by the embodiment of the present invention;

Fig. 3 is a schematic structural view of a fundus laser therapeutic apparatus provided by an embodiment of the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The specific realization of the present invention is described in detail below in conjunction with specific embodiment:

Please refer to Fig. 1, the embodiment of the present invention provides a laser adapter with continuously adjustable spot, which includes an input optical fiber 1 and an imaging lens group 2, a collimating mirror 3 and a focusing mirror 4 arranged on the laser output optical path of the input optical fiber 1 The imaging lens group 2 images the laser output from the input optical fiber 1 to form a first spot S1 whose energy distribution is a flat-top distribution. The object focal plane of the collimator 3 coincides with the first spot S1, and the laser can be output as a parallel beam , the focusing mirror 4 focuses the parallel light beam output by the collimating mirror 3 on the light-receiving surface to form the second spot S2, the imaging lens group 2 and the collimating mirror 3 can move along the direction parallel to the optical path, so that the second spot S2 can be continuously adjusted .

Wherein, the laser energy distribution of the output end surface of the input optical fiber 1 is relatively uniform, and after the laser output passes through the imaging lens group 2, a circular first spot S1 is formed. The same, or similar, are flat-top distributions. The so-called flat-top distribution: refers to the uniform distribution of light intensity in the cross-section of the beam, and its energy distribution curve is a square wave. The beam of the first spot S1 is output as a parallel beam through the collimating mirror 3, and the parallel beam is focused by the focusing mirror 4 into the second spot S2, and the energy distribution of the second spot S2 is basically the same as or slightly different from that of the first spot S1 , therefore, the second light spot S2 also has the light energy distribution characteristics of the light output end face of the input optical fiber. The imaging lens group 2 moves back and forth along the optical path to change the size of the first light spot S1, and the collimator 3 and the imaging lens group 2 move at the same time to keep the object focal plane of the collimator 3 coincident with the first light spot S1, thereby ensuring collimation The mirror 3 outputs parallel light beams without changing the image transfer ratio between the collimating mirror 3 and the focusing mirror 4, and the size of the second spot S2 changes simultaneously with the first spot S1, realizing the continuous adjustment of the second spot S2.

Moreover, for the laser adapter used for fundus treatment, the second spot acts on the lesion, and its axial position is required to be stable. The output end face of the input fiber 1 is usually fixed, and the size and position of the first spot S1 and the size of the second spot S2 will be changed through the linkage of the imaging lens group 2 and the collimating lens 3, as long as the focusing lens 4 is kept relatively to the input If the position of the light-emitting end surface of the optical fiber 1 remains unchanged, the axial position of the second light spot S2 can be guaranteed to remain unchanged, so that safe and reliable fundus treatment can be performed.

With further reference to Fig. 2, scanning vibrating mirror 5 can also be set between collimating mirror 3 and focusing mirror 4, and this scanning vibrating mirror 5 is installed on the output optical path of collimating mirror 3, and its mirror surface and the output optical path of collimating mirror 3 form a certain angle, and the mirror surface can be rotated, and then reflect the laser light in different directions, and then focus through the focusing mirror 4 to realize scanning. Specifically, the scanning galvanometer rotates on the axis of a straight line that passes through the focus of the focusing mirror and is perpendicular to the optical axis of the collimating mirror. At the focal point of the object side, the parallel light beam reflected by the vibrating mirror passes through the focusing mirror to form the second spot S2, and the second spot moves laterally in the fundus treatment area.

The laser adapter provided by the embodiment of the present invention images the output laser light of the input optical fiber 1 through the imaging lens group 2, which is equivalent to transferring the energy distribution at the output end face of the input optical fiber 1 to the first spot S1, and then the collimating lens 3 and the focusing lens 4 Form the second spot S2, which is basically the same as the energy distribution state of the first spot S1, avoiding the Gaussian distribution state of the spot energy, the spot energy is uniform, the edge is clear and sharp, the size is real and reliable, and the treatment effect is obviously improved; and through the imaging lens The linkage of group 2 and collimating mirror 3 realizes the continuous change of the size of the second spot S2, which is more convenient to change the treatment area according to the actual lesion situation, and improves the treatment effect and efficiency; the position of the focusing mirror 4 relative to the output end face of the input optical fiber 1 remains unchanged , the axial position of the second light spot S2 can be kept stable, so as to perform safe and reliable treatment.

The present invention further provides a fundus laser therapeutic apparatus, referring to FIG. 3 , including a laser light source 01 and a laser adapter 02 with continuously adjustable light spots provided by the present invention. The laser light output by the laser light source 01 is input through the input optical fiber 1 of the laser adapter 02, and then The first light spot S1 is formed through the imaging lens group 2, the second light spot S2 is formed through the collimating lens 3 and the focusing lens 4, the size of the second light spot S2 is changed through the linkage change of the imaging lens group 2 and the collimating lens 3, and the The position of the focusing lens 4 keeps the position of the second light spot S2 fixed, so as to perform fundus laser treatment.

The fundus laser treatment instrument adopts the above-mentioned laser adapter, and the energy of the spot for treating lesions is uniform, the edge is clear and sharp, and the size is real and reliable, which effectively improves the treatment effect and efficiency, and does not increase a lot of cost and operation difficulty.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. A laser adapter with continuously adjustable spot, characterized in that it comprises an input optical fiber and an imaging lens group, a collimating mirror and a focusing mirror arranged on the laser output optical path of the input optical fiber; the laser passes through the imaging lens The lens group forms the first light spot whose energy distribution is a flat-top distribution, the objective focal plane of the collimator mirror coincides with the first light spot, and the focusing mirror focuses the parallel beam output by the collimator mirror on the light-receiving surface A second light spot is formed, and the imaging lens group and the collimating mirror can move along a direction parallel to the optical path, so that the second light spot can be continuously adjusted. 2 . The laser adapter with continuously adjustable light spot according to claim 1 , wherein the energy distribution of the first light spot is the same as the energy distribution of the light output end face of the input optical fiber. 3 . 3. The laser adapter with continuously adjustable light spot according to claim 1, wherein the energy distribution of the second light spot is the same as the energy distribution of the first light spot. 4. The laser adapter with continuously adjustable spot as claimed in claim 1, characterized in that, a scanning vibrating mirror is arranged between the collimating mirror and the focusing mirror, and the scanning vibrating mirror passes through the laser adapter of the focusing mirror The focus of the object side and the straight line perpendicular to the direction of the optical axis of the collimating mirror is the axis rotation, and the center of the light spot on the scanning galvanometer that is irradiated by the parallel light beam output by the collimating mirror is located on the object side of the focusing mirror in focus. 5 . The laser adapter with continuously adjustable light spot according to claim 1 , wherein the position of the focusing mirror relative to the light output end surface of the input optical fiber is fixed. 5 . 6. A fundus laser therapy instrument, characterized in that it includes a laser light source and a laser adapter for conducting laser light to the lesion, and the laser adapter includes an input optical fiber and an imaging imaging device arranged on the laser output optical path of the input optical fiber. A lens group, a collimating mirror and a focusing mirror; the laser light passes through the imaging lens group to form a first light spot whose energy distribution is a flat-top distribution, and the object focal plane of the collimating mirror coincides with the first light spot, so The focusing lens focuses the parallel light beam output by the collimating lens on the lesion to form a second light spot, and the imaging lens group and the collimating lens can move along a direction parallel to the optical path, so that the second light spot can be continuously adjusted . 7 . The fundus laser therapeutic apparatus according to claim 6 , wherein the energy distribution of the first light spot is the same as the energy distribution of the light output end surface of the input optical fiber. 8 . 8. The fundus laser therapeutic apparatus according to claim 6, wherein the energy distribution of the second light spot is the same as that of the first light spot. 9. fundus laser therapeutic apparatus as claimed in claim 6, is characterized in that, is provided with scanning vibrating mirror between described collimating mirror and focusing mirror, and described scanning vibrating mirror passes through the object side focal point of described focusing mirror And the straight line perpendicular to the optical axis direction of the collimating mirror is an axis of rotation, and the center of the light spot of the parallel light beam output by the collimating mirror irradiated on the scanning galvanometer is located on the object focus of the focusing mirror. 10 . The fundus laser treatment apparatus according to claim 6 , wherein the position of the focusing lens relative to the light output end surface of the input optical fiber is fixed. 11 .