CN221571669U

CN221571669U - Laser energy sampling device

Info

Publication number: CN221571669U
Application number: CN202323659924.6U
Authority: CN
Inventors: 王建卫; 刘贵霞
Original assignee: Spule Zhuhai Biotechnology Co ltd
Current assignee: Spule Zhuhai Biotechnology Co ltd
Priority date: 2023-12-29
Filing date: 2023-12-29
Publication date: 2024-08-20
Anticipated expiration: 2033-12-29

Abstract

The utility model relates to the field of sensors, and particularly discloses a laser energy sampling device which comprises a spectroscope seat and a spectroscope lens, wherein the spectroscope seat and the spectroscope lens are sequentially arranged along a main light path; the spectroscope seat is provided with a second through hole for passing laser; the beam splitting lens is fixedly arranged at the rear side of the second through hole, and reflected light and emergent light are formed after incident light of laser passes through the beam splitting lens; the spectroscope seat is provided with a third through hole for passing through reflected light, the outer side of the third through hole is fixedly provided with a metal cylinder, the metal cylinder is a round tube which is communicated with two ends along the light path direction of the reflected light, a light homogenizing sheet is arranged between the metal cylinder and the third through hole, one end, far away from the third through hole, of the metal cylinder is fixedly provided with a sensor, and an amplifying circuit which is electrically connected with the sensor is used for detecting the laser energy intensity of the transmitted light homogenizing sheet in the metal cylinder through the sensor, and the amplifying circuit is used for outputting the reading of the sensor after amplifying. The utility model has simple structure, compactness, small size and low realization cost.

Description

Laser energy sampling device

Technical Field

The utility model relates to the field of sensors, in particular to a laser energy sampling device.

Background

With the development of laser technology, medical lasers are increasingly applied to the fields of minimally invasive human surgery, medical science and the like, the market is expanding gradually, and the demands for the lasers are also becoming diversified. The laser device is integrated with the optical and mechanical equipment, has complex composition and affects a plurality of factors of laser output stability, such as laser mode, gain medium temperature, cavity type, pumping energy and the like. For these factors, many methods for solving the stability of laser are adopted, such as adopting a fundamental mode for output, adopting air cooling and water cooling to cool a gain medium, stabilizing a cavity, adopting a constant current power supply and the like. The method used is also different for different lasers.

However, the lifetime of the laser is generally short, the conversion efficiency of the excitation laser is gradually reduced with the increase of the service time, which results in that the laser device newly shipped or just replaced with the laser has high energy intensity in the early stage, the output power needs to be reduced, and after a period of use, the output power needs to be gradually increased to counteract the reduction of the output laser energy.

The adjustment operation is time-consuming and labor-consuming, has high requirement on experience of operators, and is easy to cause reduction of treatment effect and even occurrence of medical accidents because of insufficient power adjustment. Therefore, the laser beam energy intensity finally output by the laser is detected in real time, and the output power is automatically compensated and adjusted, so that the laser beam energy intensity detection device is an important function of the medical laser. However, the existing laser beam splitting sampling sensor is generally provided with a complex optical path system (at least two lenses), the general volume is large, the structure is complex, the cost is high, the maintenance is difficult, and the small sensor has the problems of insufficient sampling precision, large fluctuation range of the compensated laser power and the like. In an environment where the integration level of laser equipment is higher and the market competition is stronger, the simplification of the laser energy sampling device is needed to improve the sensitivity of the laser energy sampling device, reduce the cost and reduce the volume.

Disclosure of utility model

The utility model provides a laser energy sampling device, which aims to solve the problems of large volume, high cost and insufficient accuracy of the existing laser energy sampling device.

The technical scheme adopted by the utility model is as follows: the laser energy sampling device is fixedly arranged on a main light path of emergent laser of a laser and comprises a spectroscope seat and a spectroscope lens which are sequentially arranged along the main light path;

The spectroscope seat is fixedly connected with the laser, and a second through hole for passing the laser is formed in the spectroscope seat;

The beam splitting lens is fixedly arranged at the rear side of the second through hole, the angle between the plane where the beam splitting lens is positioned and the main light path is more than 0 degrees and less than 90 degrees, and reflected light and emergent light are formed after incident light of laser passes through the beam splitting lens;

The spectroscope seat is provided with a third through hole for passing through reflected light, the outer side of the third through hole is fixedly provided with a metal cylinder, the metal cylinder is a round tube which is communicated with two ends of the light path direction of the reflected light, a light homogenizing sheet is arranged between the metal cylinder and the third through hole, one end, far away from the third through hole, of the metal cylinder is fixedly provided with a sensor and an amplifying circuit which is electrically connected with the sensor, the sensor is used for detecting the laser energy intensity of the transmitted light homogenizing sheet in the metal cylinder through the sensor, and the amplifying circuit is used for outputting the reading of the sensor after amplifying.

Preferably, the light-equalizing sheet is one of a ceramic sheet, diffuse transmission glass or frosted glass.

Preferably, the thickness of the ceramic sheet is in the range of 1-1.5mm.

Preferably, the spectroscopic lens is a planar lens.

Preferably, a surface coating is arranged on one surface of the beam splitting lens, which is close to the laser, and the surface coating is used for enabling the energy of reflected light to be 2% of the energy of incident light and the energy of emergent light to be 98% of the energy of the incident light.

Preferably, the beam-splitting lens is a plate-shaped optical glass, and the optical glass is used for enabling the energy of the reflected light to be 2% of the energy of the incident light and the energy of the emergent light to be 98% of the energy of the incident light.

Preferably, the angle between the plane of the beam splitting lens and the main light path is 45 degrees, and the incident light is perpendicular to the reflected light.

Preferably, the laser energy sampling device further comprises a spectroscope bracket and a sampling bracket;

The spectroscope support is fixedly connected with the laser, and the other end of the spectroscope support is fixedly connected with the spectroscope seat;

One end of the sampling support is fixedly connected with the laser, the other end of the sampling support is fixedly connected with the metal cylinder, and the sensor and the amplifying circuit are fixedly arranged on the sampling support.

Preferably, a first through hole for passing through the laser is formed in the other end of the spectroscope support, and the spectroscope support is in threaded connection with the spectroscope base through a plurality of second screws.

Preferably, the sampling bracket is provided with a fourth through hole for passing through the sensor, the metal cylinder is in threaded connection with the front surface of the sampling bracket through a plurality of first screws, the amplifying circuit is fixedly arranged on the back surface of the sampling bracket, and the sensor is fixedly connected with the amplifying circuit.

The beneficial effects of the utility model are as follows:

(1) The beam splitter lens is used for splitting a certain proportion of energy in laser to the light homogenizing sheet through reflection, and the sensor in the metal cylinder is used for detecting the laser energy intensity after light homogenizing, so that the energy intensity of the laser is calculated, and the beam splitter is simple in structure, small in size and low in implementation cost.

(2) Through the light homogenizing sheet, the laser after beam splitting is further homogenized and then irradiated onto the sensor sealed in the metal cylinder, so that when the energy intensity of the laser is high, the energy received by the sensor is in a measuring range, only one reflection is performed, the correlation between the laser energy and the reading of the sensor is high, and the measuring precision is high.

Drawings

The utility model will be further described with reference to the accompanying drawings, in which:

FIG. 1 is an exploded view of a first embodiment of the present utility model;

fig. 2 is a schematic diagram of an optical path of a beam splitter lens according to a second embodiment of the utility model.

In the figure: 1. a spectroscope support; 2. a spectroscope base; 3. a beam-splitting lens; 301. incident light; 302. reflecting light; 303. emitting light; 4. a ceramic sheet; 5. a metal cylinder; 6. a first screw; 7. a sampling bracket; 8. a sensor; 9. an amplifying circuit; 10. a second screw; 11. a first through hole; 12. and a second through hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 and fig. 2, in a first embodiment of the present utility model, the main optical path of the outgoing laser beam of the laser is fixedly arranged, and this embodiment specifically discloses a laser energy sampling device, which includes a beam splitter base 2 and a beam splitter lens 3 that are sequentially arranged along the main optical path;

The spectroscope seat 2 is fixedly connected with the laser, and a second through hole 12 for passing laser is formed in the spectroscope seat 2;

The beam splitter lens 3 is fixedly arranged at the rear side of the second through hole 12, and an included angle (i.e. an incident angle theta) between a normal vector of a plane where the beam splitter lens 3 is positioned and the main light path is larger than 0 degree and smaller than 90 degrees. Here, the surface of the spectroscope base 2 for fixing the spectroscope lens 3 may be an inclined plane parallel to the spectroscope lens 3, and is embedded into the spectroscope lens 3 by means of a buckle or the like; or an oblique slot for inserting and fixing the beam splitting lens 3.

After the incident light 301 of the laser passes through the beam-splitting lens 3, reflected light 302 and emergent light 303 are formed; referring to fig. 2, the emergent light 303 is refracted by the spectroscopic lens 3, and traverses the incident light 301 by Δd in the direction of the main optical path, where Δd is positively related to the angle of incidence angle θ, the refractive index of the spectroscopic lens 3, and the thickness d of the spectroscopic lens 3, and the smaller the incidence angle θ, the lower the refractive index of the spectroscopic lens 3, the smaller the thickness d, and the smaller the distance Δd.

The spectroscope seat 2 is provided with a third through hole for passing through the reflected light 302, the outer side of the third through hole is fixedly provided with a metal cylinder 5, the metal cylinder 5 is a round tube which is communicated with the two ends along the light path direction of the reflected light 302, a light equalizing piece is arranged between the metal cylinder 5 and the third through hole, one end, far away from the third through hole, of the metal cylinder 5 is fixedly provided with a sensor 8, and an amplifying circuit 9 which is electrically connected with the sensor 8.

The metal cylinder 5, the light-equalizing sheet and the sensor 8 form an integrating cavity, and the metal cylinder 5 is used for preventing light rays except the reflected light 302 transmitted by the light-equalizing sheet, so that the sensor 8 can only receive the reflected light 302 transmitted by the light-equalizing sheet; the sensor 8 is used for detecting the laser energy intensity of the light-homogenizing sheet transmitted through the metal cylinder 5 through the sensor 8; the amplifying circuit 9 is used for amplifying the reading of the output sensor 8. The sensor 8 is a diode detector, of the type photodiode or pyroelectric detector.

The spectroscopic lens 3 of the present embodiment is a plate-shaped optical glass (i.e., a planar lens) for making the energy of the reflected light 302 2% of the energy of the incident light 301 and the energy of the outgoing light 303 98% of the energy of the incident light 301. By selecting the optical glass with specific reflectivity as the material of the beam-splitting lens 3, only a small proportion of the laser energy can be split for measuring the laser intensity, so that the loss of the laser is reduced, the energy intensity on the sensor 8 is reduced, and the ratio of the energy of the reflected light 302 to the energy of the incident light 301 is basically fixed due to the fixed reflectivity, so that the energy intensity measured by the sensor 8 is in direct proportion to the output laser intensity, and the correlation degree of the measurement result is high.

In the embodiment, a certain proportion of energy in laser is split to the light homogenizing sheet through reflection by the light splitting lens 3, and the energy intensity of the laser after light homogenizing is detected by the sensor 8 in the metal cylinder 5, so that the energy intensity of the laser is calculated, and the light homogenizing device is simple in structure, small in size and low in implementation cost. Through the light homogenizing sheet, the laser after beam splitting is further homogenized and then irradiates the sensor 8 sealed in the metal cylinder 5, when the energy intensity of the laser is high, the energy received by the sensor 8 is in a measuring range, only one reflection is carried out, the correlation between the laser energy and the reading of the sensor 8 is high, and the measuring precision is high.

The second embodiment of the present utility model is different from the first embodiment in that the light equalizing sheet of the present embodiment is a ceramic sheet 4; the ceramic plate 4 is a ceramic plate 4 with the thickness of 1-1.5mm, and is used for homogenizing laser energy through diffuse transmission, the beam shape is Gaussian beam, the beam passing through the ceramic plate 4 becomes a round surface, the energy distribution on the round surface can be homogenized after a certain distance is passed, and the homogenized energy can be detected by a detector outside the distance. In other embodiments, the light-equalizing sheet may be a diffuse transmission glass or a frosted glass, as long as the energy of the laser light can be homogenized.

The surface of the beam splitter lens 3 close to the laser is provided with a surface coating, and the surface coating is used for enabling the energy of the reflected light 302 to be 2% of the energy of the incident light 301 and the energy of the emergent light 303 to be 98% of the energy of the incident light 301.

The normal vector of the plane of the beam-splitting lens 3 is 45 degrees to the angle of the main optical path (i.e., the incident angle θ), and the incident light 301 is perpendicular to the reflected light 302. Therefore, the axes of the spectroscope seat 2 and the metal cylinder 5 are also mutually perpendicular, the design and the processing of each part are more convenient, and the selection of the spectroscope lens 3 suitable for reflectivity is easier.

The laser energy sampling device of the embodiment also comprises a spectroscope bracket 1 and a sampling bracket 7;

the spectroscope support 1 is fixedly connected with the laser, and the other end of the spectroscope support 1 is fixedly connected with the spectroscope base 2;

One end of a sampling bracket 7 is fixedly connected with the laser, the other end of the sampling bracket 7 is fixedly connected with the metal cylinder 5, and a sensor 8 and an amplifying circuit 9 are fixedly arranged on the sampling bracket 7; the other end of the spectroscope support 1 is provided with a first through hole 11 for passing laser, and the spectroscope support 1 is in threaded connection with the spectroscope base 2 through a plurality of second screws 10.

The sampling bracket 7 is provided with a fourth through hole for penetrating the sensor 8, the metal cylinder 5 is in threaded connection with the front surface of the sampling bracket 7 through a plurality of first screws 6, the amplifying circuit 9 is fixedly arranged on the back surface of the sampling bracket 7, and the sensor 8 is fixedly connected with the amplifying circuit 9.

Through setting up spectroscope support 1, simplified the structure of spectroscope seat 2, make it fixed and installation more easily, through setting up sample support 7, make things convenient for the circuit board of metal cylinder 5, sensor 8 and amplifying circuit 9 to install fixedly, make the structure more compact, the whole fixed is more firm.

The overhauling time of the laser energy sampling device is shortened; the high-low pressure separation is safer during maintenance; the wiring is convenient during maintenance, the whole replacement is convenient, and the maintenance is convenient; the capability requirement of maintenance personnel is reduced, and the damaged module can be confirmed by simple measurement with a universal meter.

The foregoing embodiments have been provided for the purpose of illustrating the technical scheme and advantageous effects of the present utility model in further detail, and it should be understood that the foregoing embodiments are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model. It should be noted that any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without departing from the spirit and principles of the present utility model are intended to be included in the scope of the present utility model.

Claims

1. The laser energy sampling device is fixedly arranged on a main light path of the outgoing laser of the laser and is characterized by comprising a spectroscope seat (2) and a spectroscope lens (3) which are sequentially arranged along the main light path;

The spectroscope seat (2) is fixedly connected with the laser, and a second through hole (12) for passing the laser is formed in the spectroscope seat (2);

The beam splitting lens (3) is fixedly arranged at the rear side of the second through hole (12), the angle between the plane where the beam splitting lens (3) is positioned and the main light path is more than 0 degrees and less than 90 degrees, and reflected light (302) and emergent light (303) are formed after incident light (301) of laser passes through the beam splitting lens (3);

Be equipped with the third through-hole that is used for passing through reflection light (302) on spectroscope seat (2), the outside of third through-hole is fixed to be equipped with metal cylinder (5), metal cylinder (5) are followed the pipe that reflection light (302) light path direction both ends link up, metal cylinder (5) with be equipped with the light homogenizing piece between the third through-hole, metal cylinder (5) are kept away from the fixed sensor (8) that is equipped with of one end of third through-hole, and with amplifying circuit (9) that sensor (8) electric connection, sensor (8) are used for detecting through sensor (8) the laser energy intensity of being permeated light homogenizing piece in metal cylinder (5), amplifying circuit (9) are used for outputting after amplifying the reading of sensor (8).

2. The laser energy sampling device of claim 1, wherein the light homogenizing sheet is one of a ceramic sheet (4), diffuse transmission glass or frosted glass.

3. A laser energy sampling device according to claim 2, characterized in that the thickness of the ceramic plate (4) is in the range 1-1.5mm.

4. A laser energy sampling device according to claim 1, characterized in that the beam splitting lens (3) is a planar lens.

5. The laser energy sampling device according to claim 4, wherein the surface of the beam splitter lens (3) close to the laser is provided with a surface coating for making the energy of the reflected light (302) 2% of the energy of the incident light (301) and the energy of the outgoing light (303) 98% of the energy of the incident light (301).

6. The laser energy sampling device according to claim 4, wherein the beam splitting lens (3) is a plate-shaped optical glass for making the energy of the reflected light (302) 2% of the energy of the incident light (301) and the energy of the outgoing light (303) 98% of the energy of the incident light (301).

7. A laser energy sampling device according to claim 1, characterized in that the angle of the plane of the beam splitting lens (3) to the main light path is 45 degrees, the incident light (301) being perpendicular to the reflected light (302).

8. A laser energy sampling device according to claim 1, characterized in that the laser energy sampling device further comprises a spectroscopic support (1) and a sampling support (7);

The spectroscope support (1) is fixedly connected with the laser, and the other end of the spectroscope support (1) is fixedly connected with the spectroscope base (2);

One end of the sampling support (7) is fixedly connected with the laser, the other end of the sampling support (7) is fixedly connected with the metal cylinder (5), and the sensor (8) and the amplifying circuit (9) are fixedly arranged on the sampling support (7).

9. The laser energy sampling device according to claim 8, wherein a first through hole (11) for passing the laser is formed at the other end of the spectroscope support (1), and the spectroscope support (1) is screwed with the spectroscope base (2) through a plurality of second screws (10).

10. The laser energy sampling device according to claim 8, wherein the sampling support (7) is provided with a fourth through hole for passing through the sensor (8), the metal cylinder (5) is in threaded connection with the front surface of the sampling support (7) through a plurality of first screws (6), the amplifying circuit (9) is fixedly arranged on the back surface of the sampling support (7), and the sensor (8) is fixedly connected with the amplifying circuit (9).