CN221106019U

CN221106019U - Automatic focusing laser ranging device and laser system

Info

Publication number: CN221106019U
Application number: CN202322063043.1U
Authority: CN
Inventors: 钟学东; 王军强; 韩巍; 孟瑶; 张腾
Original assignee: Beijing Huigu Medical Technology Co ltd
Current assignee: Beijing Huigu Medical Technology Co ltd
Priority date: 2023-08-02
Filing date: 2023-08-02
Publication date: 2024-06-11
Anticipated expiration: 2033-08-02

Abstract

The utility model discloses an automatic focusing laser ranging device and a laser system, comprising: the device comprises a reflecting device, a focusing device, a distance measuring laser device, a transmission device and a shell. In the device, the ranging laser has the functions of focus indication and ranging, and the ranging laser irradiates the surface of bones or soft tissues and then returns to a nearby receiver to perform real-time ranging; through introducing motor and lead screw, both pass through the gear coupling, and the motor is according to the positive, negative electricity signal feedback that range finding laser given, carries out forward or reverse rotation, drives the rotatory adjustment lens position of lead screw, finally obtains the correct focusing of work laser.

Description

Automatic focusing laser ranging device and laser system

Technical Field

The utility model belongs to the field of focusing of lasers, and particularly relates to an automatic focusing laser ranging device and a laser system.

Background

In the laser surgery, in order to obtain a better bone or soft tissue cutting effect, the working laser is often focused by a lens, so as to obtain a smaller spot size and a larger energy density. Because the surface of the bone or soft tissue is not a plane, but a curved surface or other complex arc surfaces, the working distance of the working laser needs to be adjusted in real time in the laser operation process, so that the distance between the working surface and the lens is kept as a focal length, otherwise, the laser is out of focus, and the cutting efficiency is reduced.

In a common laser surgery working scene, three lasers are generally required to be combined and matched: one beam is working laser, sometimes invisible, mainly used for cutting bones or soft tissues; one beam of visual indicating laser is coaxial with the working laser, is green or red in general, and is used for indicating the position of a light spot of the actual working laser on the surface of bones or soft tissues; one beam is ranging laser, which is not coaxial with the working laser, and is usually used for real-time ranging by adopting a triangular ranging method, and mainly used for measuring the distance between a focusing lens and a working surface. In the laser operation process, when working laser is in a focusing state, the light spot size of the working laser irradiated to the working surface is minimum, the energy density is maximum, and higher cutting efficiency can be kept, and at the moment, the light spots of three laser beams are usually gathered to the same point; when the working laser is in a defocusing state at a certain moment, namely, the distance between the lens and the surface of the bone or soft tissue is larger or smaller, the spot size is increased, the energy density is reduced, the cutting efficiency is reduced, and the distance measuring laser and the spot of the working laser are not overlapped at the moment.

Disclosure of utility model

In order to improve the above technical problems, the present utility model provides a laser ranging device, comprising:

The reflecting device comprises an indication light cylinder and a reflecting mirror, wherein the reflecting mirror is arranged in the indication light cylinder and forms 45 degrees with the horizontal plane;

the focusing device is connected with the reflecting device and comprises a lens, a lens cone and a lens cone fixing ring;

The ranging laser device comprises a ranging laser, a receiver and a receiver fixing piece;

the distance measuring laser is arranged on the indicating light cylinder, and distance measuring laser emitted by the distance measuring laser is coaxially coupled with working laser after passing through the reflecting mirror;

The receiver is arranged on the lens cone fixing ring through a receiver fixing piece and is used for receiving the reflected light of the ranging laser irradiated to the working surface, and the signal converter converts the optical signal into an electric signal;

The transmission device is arranged on the other side of the focusing device and comprises a connecting piece, a lead screw and a motor; the connecting piece is fixed on the lens cone fixing ring and the screw rod, the motor is electrically connected with the signal converter, forward or reverse rotation is carried out according to the electric signal of the signal converter, and the focusing device and the receiver are driven to move.

According to an embodiment of the present utility model, the connection member is a rotation nut having a center hole through which the rotation nut is disposed on the screw shaft and a side hole through which the rotation nut is fixed to the barrel fixing ring.

According to an embodiment of the utility model, the transmission further comprises a motor gear connected with the motor and a screw gear connected with the screw, the motor gear and the screw gear being meshed.

When the motor drives the motor gear to rotate, the screw gear simultaneously rotates, and the rotating nut moves back and forth on the screw, so that the front and back position change of the focusing device is driven, and real-time focusing is realized.

According to an embodiment of the present utility model, the laser ranging apparatus further includes a housing, which is a non-closed hexahedron surrounded by the upper cover plate, the lower cover plate, the front cover plate, the rear cover plate, and the side cover plate.

According to an embodiment of the utility model, the reflecting means and the focusing means are located in the housing with a space in the housing that moves back and forth.

According to an embodiment of the utility model, the reflecting means and the focusing means are connected by means of an adapter.

According to an embodiment of the utility model, the receiver fixture comprises a first plate, a second plate and two parallel circular rails;

The first plate is fixed between the upper cover plate and the lower cover plate, and one side edge of the first plate is fixed on the lens barrel fixing ring;

the second plate is connected to the other side edge of the first plate in a hinge mode, and the receiver is fixed on the plate surface of the second plate;

Two parallel circular rails penetrate through the plate surface of the first plate, one end of each circular rail is fixed on the front cover plate, and the other end of each circular rail is fixed on the rear cover plate.

According to an embodiment of the utility model, one end of the screw rod is fixed on the front cover plate, and the other end is fixed on the rear cover plate.

According to an embodiment of the utility model, the two circular rails are parallel to the screw.

According to an embodiment of the utility model, an opening is provided in the back cover plate for the working laser light to pass through into the reflecting means.

According to the embodiment of the utility model, the U-shaped opening is arranged on the front cover plate, so that working laser and ranging laser can conveniently irradiate on a working surface, and the ranging laser on the working surface can conveniently reflect on a receiver.

According to the embodiment of the utility model, the axes of the indicating light cylinder and the lens barrel fixing ring are coincident with the working laser.

According to an embodiment of the present utility model, the material of the lens or the reflecting mirror is selected from calcium fluoride, sapphire, and the like.

According to an embodiment of the utility model, the motor includes, but is not limited to, a stepper motor or a servo motor.

According to a preferred embodiment of the present utility model, the laser ranging apparatus includes:

The transmission device comprises a rotating nut, a screw rod, a motor gear connected with the motor and a screw rod gear connected with the screw rod, wherein the motor gear is meshed with the screw rod gear;

The rotary nut is provided with a central hole and a side hole, the rotary nut is arranged on the screw rod through the central hole, and the rotary nut is fixed on the lens barrel fixing ring through the side hole;

The motor is electrically connected with the signal converter and rotates forward or backward according to the electric signal of the signal converter, so that the focusing device and the receiver are driven to move;

The shell is a non-closed hexahedron surrounded by an upper cover plate, a lower cover plate, a front cover plate, a rear cover plate and a side cover plate, and the reflecting device and the focusing device are positioned in the shell and have a space for moving back and forth in the shell;

the receiver fixing piece comprises a first plate, a second plate and two parallel circular rails;

The first plate is vertically fixed between the upper cover plate and the lower cover plate, and one side edge of the first plate is fixed on the lens barrel fixing ring;

the two parallel circular rails penetrate through the plate surface of the first plate, one end of each circular rail is fixed on the front cover plate, and the other end of each circular rail is fixed on the rear cover plate;

one end of the screw rod is fixed on the front cover plate, and the other end of the screw rod is fixed on the rear cover plate;

An opening is formed in the rear cover plate and used for allowing working laser to pass through and enter the reflecting device;

The front cover plate is provided with a U-shaped opening, so that working laser and ranging laser can conveniently irradiate the working surface, and the ranging laser of the working surface can conveniently reflect to the receiver.

The utility model also provides a laser system comprising the laser ranging device.

According to an embodiment of the utility model, the laser system further comprises a working laser, which is arranged on the back cover plate.

Advantageous effects

The distance measuring laser and the working laser for cutting are coaxially coupled by introducing a 45-degree reflecting mirror, so that the distance measuring laser has the functions of focus indication and distance measurement, and the distance measuring laser is irradiated to a working surface (such as a bone or soft tissue surface) and then is reflected to a nearby receiver for real-time distance measurement; through introducing motor and lead screw, both linkage, the motor carries out forward or reverse rotation according to the positive and negative electric signal feedback that ranging laser given, drives the rotatory adjustment lens position of lead screw, finally obtains the correct focusing and the real-time focusing of working laser on the working surface.

The device omits the related structure of the indication laser, only uses the working laser and the ranging laser, wherein the ranging laser has the functions of ranging and focus indication, and the whole structure is relatively simple and reliable.

Drawings

FIG. 1 is an isometric view A of a laser ranging device;

FIG. 2 is an isometric view B of a laser ranging device;

FIG. 3 is a front view of a laser ranging device;

FIG. 4 is a right side view of the laser ranging device;

FIG. 5 is a front view of the transmission;

FIG. 6 is a right side view of the transmission;

FIG. 7 is a rear view of the transmission;

FIG. 8 is an isometric view of the housing;

FIG. 9 is an isometric view of a focusing assembly and a reflecting assembly;

FIG. 10 is a schematic diagram of the optical paths of the focusing device and the reflecting device.

Reference numerals:

1-range laser, 2-receiver, 3-lens barrel retainer plate, 4-lens barrel, 5-adapter, 6-indicating light barrel, 7-reflector, 8-motor, 9-rotating nut, 10-lead screw, 11-lead screw gear, 12-motor gear, 13-first plate, 14-second plate, 15-circular rail, 16-housing, 17-working surface, 18-upper cover plate, 19-lower cover plate, 20-front cover plate, 21-rear cover plate, 22-side cover plate, 23-lens, 24-working laser, 25-range laser, 26-working laser, 27-reflected range laser.

Detailed Description

The technical scheme of the utility model will be further described in detail below with reference to specific embodiments. It is to be understood that the following examples are illustrative only and are not to be construed as limiting the scope of the utility model. All techniques implemented based on the above description of the utility model are intended to be included within the scope of the utility model.

In describing embodiments of the present application, it should be understood that the azimuth or positional relationship indicated by the terms "upper", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship conventionally put in place when the product of this application is used, or the azimuth or positional relationship conventionally understood by those skilled in the art are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element to be referred must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

Unless otherwise indicated, the receivers, signal converters, and the like used in the following examples are known in the art.

Example 1

A laser ranging apparatus as shown in fig. 1-4, comprising: the device comprises a reflecting device, a focusing device, a distance measuring laser device, a transmission device and a shell;

the reflecting device comprises an indicating light cylinder 6 and a reflecting mirror 7, wherein the reflecting mirror 7 is arranged in the indicating light cylinder 6, and the reflecting mirror 7 forms 45 degrees with the horizontal plane; focusing means connected to the reflecting means, including a lens 23, a lens holder 3, and a lens barrel 4 (see fig. 9);

the ranging laser device comprises a ranging laser 1, a receiver 2 and a receiver fixing piece;

The ranging laser 1 is arranged on the indicating light cylinder 6, and the ranging laser emitted by the ranging laser 1 is coaxially coupled with the working laser after passing through the reflecting mirror 7;

The receiver 2 is arranged on the lens fixing ring 3 through a receiver fixing piece and is used for receiving the return light after the ranging laser irradiates the working surface, and the optical signal is converted into an electric signal through the signal converter;

the transmission device (see fig. 5-7) comprises a motor 8, a rotating nut 9, a screw 10, a motor gear 12 connected with the motor 8 and a screw gear 11 connected with the screw 10, wherein the motor gear 12 is meshed with the screw gear 11;

The rotating nut 9 is provided with a central hole and a side hole, the rotating nut 9 is arranged on the screw rod 10 through the central hole, and the rotating nut 9 is fixed on the lens fixing ring 3 through the side hole;

The motor 8 is electrically connected with the signal converter and rotates forward or backward according to the electric signal of the signal converter so as to drive the focusing device and the receiver 2 to move;

The housing 16 (see fig. 8) is a non-closed hexahedron surrounded by an upper cover plate 18, a lower cover plate 19, a front cover plate 20, a rear cover plate 21 and a side cover plate 22, and the reflecting means and the focusing means are located in the housing 16 and have a space to move back and forth within the housing 16;

the receiver fixture comprises a first plate 13, a second plate 14 and two parallel circular rails 15;

The first plate 13 is vertically fixed between the upper cover plate 18 and the lower cover plate 19, and one side edge of the first plate 13 is fixed on the lens barrel fixing ring 3;

The second plate 14 is connected to the other side edge of the first plate 13 in a hinge mode, and the receiver 2 is fixed on the plate surface of the second plate 14;

Two parallel circular rails 15 penetrate through the plate surface of the first plate 13, one end of each circular rail 15 is fixed on the front cover plate 20, and the other end is fixed on the rear cover plate 21;

One end of the screw rod 10 is fixed on the front cover plate 20, and the other end is fixed on the rear cover plate 21;

The rear cover plate 21 is provided with an opening for the working laser 26 to pass through into the reflecting device;

The front cover plate 20 is provided with a U-shaped opening to facilitate the irradiation of the working laser 26 and the ranging laser 25 to the working surface and the reception of the reflected ranging laser 27 by the working surface by the receiver.

Example 2

A laser system includes the laser ranging apparatus provided in embodiment 1 and a working laser provided on the back cover plate 21.

Example 3

The laser ranging device provided in embodiment 1 specifically:

The motor of the transmission device is a stepping motor, the diameter of the screw rod is 3.5mm, the lens of the focusing device is a calcium fluoride lens with the focal length of 50mm, the reflector is sapphire glass which is placed at an angle of 45 degrees with the horizontal plane, the ranging laser adopts 635nm working wavelength, the shell adopts 4mm thick 3-series aluminum alloy material, and laser with 2100nm wavelength is adopted as working laser.

The light path in operation is shown in fig. 10: the 635nm red laser emitted by the ranging laser is reflected by the sapphire glass and kept coaxial with the working laser, and is commonly irradiated on the working surface (such as the surface of bones or soft tissues). The receiver receives and calculates the ranging laser. When the distance from the lens to the working surface is greater than or less than 50mm, the stepping motor receives the feedback of positive and negative electric signals given by the ranging laser, and the lead screw is controlled to rotate forward or backward through the linkage of the electric gear, so that the rotating nut fixed on the lead screw drives the lens barrel to be close to or far away from the surface of the skeleton or the soft tissue, thereby realizing real-time focusing, obtaining correct focusing of the working laser, and enabling the focus of the working laser focused by the lens in the lens barrel to always fall on the working surface.

The embodiments of the present utility model have been described above. However, the present utility model is not limited to the above embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A laser ranging device, characterized in that it comprises:

2. The laser ranging apparatus as claimed in claim 1, wherein the connection member is a rotation nut having a central hole through which the rotation nut is disposed on the screw shaft and a side hole through which the rotation nut is fixed to the barrel fixing ring.

3. The laser ranging device as claimed in claim 1, wherein the transmission further comprises a motor gear coupled to the motor and a lead screw gear coupled to the lead screw, the motor gear and the lead screw gear being meshed.

4. The laser ranging device as claimed in claim 1, further comprising a housing, which is a non-closed hexahedron surrounded by an upper cover plate, a lower cover plate, a front cover plate, a rear cover plate and a side cover plate;

The reflecting device and the focusing device are positioned in the shell, and a space for moving back and forth is formed in the shell.

5. The laser ranging device of claim 4, wherein the receiver mount comprises a first plate, a second plate, and two circular rails in parallel;

6. The laser ranging device as claimed in claim 5, wherein one end of the screw is fixed to the front cover plate and the other end is fixed to the rear cover plate;

The two circular rails are parallel to the screw rod.

7. The laser ranging device as claimed in claim 4, wherein the rear cover plate is provided with an opening, and the front cover plate is provided with a U-shaped opening.

8. The laser ranging device as claimed in claim 1, wherein the axes of the indicating light cylinder and the lens barrel retainer ring coincide with the working laser.

9. A laser system comprising a laser ranging device as claimed in any one of claims 1 to 8.

10. The laser system of claim 9, further comprising a working laser disposed on the back plate.