CN112846489B

CN112846489B - Angle-adjustable laser beam expanding focusing device

Info

Publication number: CN112846489B
Application number: CN202011628191.8A
Authority: CN
Inventors: 张硕
Original assignee: Zhejiang Dipu Diagnosis Technology Co ltd
Current assignee: Zhejiang Dipu Diagnosis Technology Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2023-03-21
Anticipated expiration: 2040-12-31
Also published as: CN112846489A

Abstract

The invention provides an angle-adjustable laser beam expanding and focusing device, wherein a collimating lens, a beam expanding lens and a focusing lens are sequentially fixed on a lens barrel body, the barrel body is fixed on a focusing seat, the collimating lens and the beam expanding lens are fixed through a switching ring to form a beam expanding assembly, one end of the beam expanding assembly is fixed at the upper end part of the barrel body through the switching ring, the other end of the beam expanding assembly is movably fixed on the barrel body through the beam expanding lens, and the beam expanding assembly can adjust the angle through the matching of the switching ring, the wall of the barrel body, a pressing ring and an elastic element.

Description

Angle-adjustable laser beam expanding focusing device

Technical Field

The invention belongs to the field of medical instruments, and particularly relates to an angle-adjustable laser beam expanding and focusing device.

Background

Time-of-flight mass spectrometers are a very common type of mass spectrometer. The principle of the mass spectrometer is that ion clouds generated by bombarding a sample by laser pulses enter a field-free drift tube after being accelerated, and are finally received by an ion detector to generate detection signals, and the number and the mass of the ion clouds bombarded by the laser pulses are related to indexes such as signal accuracy, signal-to-noise ratio and the like. Therefore, strict requirements are imposed on the spot diameter, the incident angle and the position of the laser, a structure capable of conveniently adjusting the focal length and the incident angle of the light beam at any time is needed, and the adjusted focal length and angle are kept stable in a vibration environment.

At present, domestic similar products are few, most of the similar products do not have an angle adjusting function, and the light beam angle is slightly changed and the light beam irradiation position is shaken due to fit clearance and tolerance when the focal length is adjusted. In addition, most products with the focal length and angle adjusting functions use a reflection type angle adjusting mechanism, the adjusting range is too large, the adjusting sensitivity is too high, and the adjustment is very inconvenient.

Disclosure of Invention

In order to solve the technical problem that the angle of a light beam cannot be adjusted or is difficult to adjust in the prior art, the invention provides a laser beam expanding and focusing device capable of adjusting the focal length and the angle of the light beam simultaneously.

Therefore, the invention provides the following technical scheme:

a laser beam expanding and focusing device with an adjustable angle comprises a lens barrel and a focusing seat, wherein a barrel body of the lens barrel is fixed on the focusing seat, a collimating lens, a beam expanding lens and a focusing lens are sequentially arranged on the barrel body, the axes of the collimating lens and the beam expanding lens are on the same straight line, and the axes of the focusing lens and the barrel body are on the same straight line; the collimating lens and the beam expanding lens are fixed through the adapter ring to form a beam expanding assembly, one end of the beam expanding assembly is fixed at the upper end of the barrel body through the adapter ring, and the other end of the beam expanding assembly is movably fixed on the barrel body through the beam expanding lens; the opening part at the upper end of the barrel body is provided with a pressing ring, and the adapter ring is fixed at the upper end part of the barrel body through the pressing ring and an elastic element positioned between the pressing ring and the upper surface of the adapter ring; the outer edge of the adapter ring is matched with the inner edge of the upper port of the cylinder body, and a gap is formed between the outer edge of the adapter ring and the side wall of the cylinder body; the beam expander and the fixing component of the cylinder body comprise a clamping ring arranged on the outer wall of the beam expander and a positioning component capable of penetrating through the wall of the cylinder body and being in compression fit with the clamping ring.

Preferably, the outer surface of the snap ring is a conical surface.

Preferably, the outer edge of the adapter ring is provided with an arc surface, and the inner edge of the upper port of the cylinder body is provided with a conical surface matched with the arc outer edge of the adapter ring.

Preferably, the pressing ring is a threaded pressing ring in threaded connection with the barrel body.

Preferably, the positioning parts are screws with spring ball heads, and the number of the screws is at least three.

Preferably, the focusing mirror is fixed on the cylinder body through a focusing mirror compression ring; the cylinder body is fixed on the focusing seat through the focusing ring.

Preferably, the focusing device further comprises a second screw, a mounting hole is formed in the position, corresponding to the focusing ring, of the cylinder body, and the second screw can penetrate through the mounting hole of the focusing ring to be matched with the threaded mounting hole of the cylinder body.

Compared with the prior art, the angle-adjustable laser beam expanding and focusing device provided by the embodiment of the invention has the following beneficial effects:

1. the beam expanding assembly is fixed on the barrel body by using the threaded compression ring and the elastic element, so that the beam expanding lens can be reliably fixed on the barrel body, and the beam expanding lens can adapt to different positions of the beam expanding assembly through the deformation of the elastic element during angle adjustment;

2. in the installation process, the beam expanding assembly and the lens cone can be positioned and matched through the arc surface on the beam expanding assembly and the conical surface on the cylinder body, the angle of the light beam is fixed near an ideal angle, and the angle is not required to be adjusted greatly;

3. the problem that the angle of a light beam is changed due to fit clearance and tolerance when the focal length is adjusted in the prior art is solved.

4. The direction of the axis of the beam expanding assembly can be adjusted by the compression fit of the clamping ring fixed on the beam expanding assembly and the positioning part penetrating through the cylinder body, the adjusting range is all directions in a cone taking the axis of the cylinder body as the center, and the adjusting range is large; the direction and the adjustment amount are adjusted by adjusting the depth of the positioning component, and the adjustment effect is very visual and obvious. Moreover, if the positioning component is a hand screw, the operation can be convenient without using tools.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of an angle-adjustable laser beam expanding and focusing apparatus according to the present invention;

fig. 2 is a schematic sectional view of a lens barrel structure according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a focus adjustment base according to an embodiment of the invention.

In the figure: 1-cylinder body, 2-first screw, 3-adapter ring, 4-press ring, 5-collimating lens, 6-elastic element, 7-focusing lens, 8-focusing lens press ring, 9-snap ring, 10-beam expanding lens, 11-second screw, 12-focusing seat and 13-focusing ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 and fig. 2 are schematic diagrams illustrating a preferred embodiment of an angle-adjustable laser beam expanding and focusing apparatus according to the present invention. The laser beam expanding and focusing device of the embodiment comprises a lens barrel, and the lens barrel comprises a barrel body 1, a first screw 2, a switching ring 3, a pressing ring 4, a collimating lens 5, an elastic element 6, a focusing lens 7, a focusing lens pressing ring 8, a clamping ring 9, a beam expanding lens 10, a second screw 11, a focusing seat 12 and a focusing ring 13. The barrel body 1 of the lens barrel is fixed on the focusing seat 12, and the collimating lens 5, the beam expanding lens 10 and the focusing lens 7 are sequentially fixed on the barrel body 1.

The collimating lens 5 and the beam expanding lens 10 are fixed through the adapter ring 3 to form a whole beam expanding assembly. The adapter ring of this embodiment is discoid solid of revolution, and 3 upper portions of adapter ring are equipped with the screw thread mounting hole one with 5 complex collimating lenses, and 3 lower parts of adapter ring are equipped with the screw thread mounting hole two with beam expanding lens 10 complex, and screw thread mounting hole one communicates with each other with screw thread mounting hole two. One end of the beam expanding component is fixed at the upper end part of the barrel body through the adapter ring 3, and the other end of the beam expanding component is fixed on the barrel body through the beam expanding lens 10.

The opening part of the upper end of the cylinder body 1 is provided with a pressing ring 4, the pressing ring 4 can be an extension part of the opening part of the upper end of the cylinder body 1, and also can be a threaded pressing ring connected with the opening part of the upper end of the cylinder body 1. The upper surface of the adapter ring 3 is matched with the lower surface of the upper end part of the pressure ring 4, an elastic element 6 is arranged between the lower surface of the pressure ring 4 and the upper surface of the adapter ring 3, and the adapter ring 3 is tightly pressed and fixed at the upper end part of the barrel body through the pressure ring 4 and the elastic element 6.

In order to better cooperate, fix switching ring 3 and stack 1, and in order to adjust the angle of the subassembly of expanding the beam in convenience, the outward flange of switching ring 3 of this embodiment is equipped with the arc surface, stack upper end mouth inner edge be equipped with the convex outward flange complex conical surface of switching ring be equipped with the space between 3 outward flanges of switching ring and the stack lateral wall, can make the subassembly of expanding the beam as required by the angle, adjust the angle of the subassembly of expanding the beam through the cooperation position of 3 outward flanges of adjustment switching ring and stack upper end mouth inner edge, adjust the angle after, clamping ring 4 passes through the threaded fixation on stack 1 in, extrude elastic element 6 and apply for 3 axial power of switching ring, make the switching ring fix on stack 1 reliably, like this, the angle of the subassembly of expanding the beam is just adjusted and is fixed. The axis of collimating lens and beam expanding lens is on same straight line, and the axis of focusing lens and stack shell is located same straight line, and when not doing any angular adjustment, two axes are unanimous basically, and after the beam expanding subassembly angular adjustment, the axis of collimating lens and beam expanding lens and the axis of focusing lens and stack shell can form an contained angle, and the contained angle control range of this embodiment is between about 5.

The other end of the beam expanding component is fixed on the cylinder body through a beam expanding lens 10. The beam expander 10 is movably fixed to the barrel, and the fixing mode can adopt various modes. The fixing mode adopted by the embodiment is as follows: a clamping ring 9 is arranged on the outer wall of the beam expanding lens 10, and at least three positioning parts penetrate through the cylinder wall to be in compression fit with the clamping ring 9. The positioning member may be a conventional screw or screw. The positioning part of the present embodiment is preferably a first screw 2 with a spring ball head which can be screwed by hand, and the number of the first screw is preferably three.

The snap ring 9 can use glue or fix with screw on the beam expander 10, for better for screw compression fit, be equipped with the conical surface on the snap ring 9, the back top is tightened to first screw 2 on the conical surface of snap ring 9, both can protect beam expander 10 like this, can also apply simultaneously and give axial and radial power of beam expander, combine the axial force that elastic element 6 applyed, can improve beam expander 10's axial and radial stability.

The focusing mirror 7 is fixed on the barrel body 1 through a focusing mirror clamping ring 8.

The focusing ring 13 is fixed on the focusing base 12, and the focusing ring 13 can rotate freely.

The cylinder body 1 is fixed on the focusing ring 13 through threads, and when the focusing ring 13 rotates, the cylinder body 1 can axially move in an inner hole of the focusing seat 12 to realize the adjustment of focal length.

The barrel body 1 is provided with a threaded hole, and after the barrel body 1 is fixed on the focusing ring, a second screw 11 can be screwed into the barrel body 1 by hands to realize axial fixation of the barrel body 1.

The elastic element 6 is circular in cross section, and circular rings with other cross sections such as rectangular, square and the like can be selected, and other elastic elements can be used.

When the angle of the light beam is adjusted, the screw 2 on one side of the deflection direction is firstly screwed out according to the requirement, and then the other screws 2 are screwed down to realize the adjustment and the fixation of the direction; when the focal length of the light beam is adjusted, the second screw 11 is loosened, the focusing ring 13 is rotated as required, and the second screw 11 is fixed after the required focal length is reached, so that the adjustment of the focal length can be realized.

Claims

1. The utility model provides an adjustable angle's laser beam expanding focusing device, includes lens cone and focusing seat (12), and barrel (1) of lens cone is fixed on the focusing seat, its characterized in that: the barrel body (1) is sequentially provided with a collimating lens (5), a beam expanding lens (10) and a focusing lens (7), the axes of the collimating lens and the beam expanding lens are on the same straight line, and the axes of the focusing lens and the barrel body are on the same straight line; the collimating lens (5) and the beam expanding lens (10) are fixed through the adapter ring (3) to form a beam expanding assembly, one end of the beam expanding assembly is fixed at the upper end part of the barrel body through the adapter ring (3), and the other end of the beam expanding assembly is movably fixed on the barrel body through the beam expanding lens (10); a pressing ring (4) is arranged at an opening part at the upper end of the barrel body (1), and the adapter ring (3) is fixed at the upper end part of the barrel body through the pressing ring (4) and an elastic element (6) positioned between the pressing ring and the upper surface of the adapter ring (3); the outer edge of the adapter ring (3) is matched with the inner edge of the upper end opening of the cylinder body, the outer edge of the adapter ring (3) is provided with an arc surface, the inner edge of the upper end opening of the cylinder body is provided with a conical surface matched with the arc outer edge of the adapter ring, and a gap is formed between the outer edge of the adapter ring (3) and the side wall of the cylinder body (1); the beam expander (10) and the fixing component of the cylinder body comprise a clamping ring (9) arranged on the outer wall of the beam expander (10) and a positioning component capable of passing through the cylinder body wall and being in press fit with the clamping ring (9).

2. The adjustable angle laser expanded beam focusing apparatus of claim 1, wherein: the outer surface of the snap ring (9) is a conical surface.

3. The adjustable angle laser expanded beam focusing apparatus of claim 1, wherein: the pressing ring (4) is a threaded pressing ring in threaded connection with the barrel body.

4. The adjustable angle laser expanded beam focusing apparatus of claim 3, wherein: the positioning parts are first screws with spring ball heads, and the number of the positioning parts is at least three.

5. The adjustable angle laser expanded beam focusing apparatus according to any one of claims 1-4, wherein: the focusing mirror (7) is fixed on the barrel body through a focusing mirror compression ring (8); the novel focusing device is characterized by further comprising a focusing ring (13), wherein the focusing ring (13) is rotatably connected with the focusing seat (12), and the barrel body (1) is fixed on the focusing seat (12) through the focusing ring (13).

6. The adjustable angle laser beam expanding focusing device according to claim 5, wherein: the focusing device comprises a second screw (11), wherein a mounting hole is formed in the position, corresponding to a focusing ring (13), of the barrel body (1), and the second screw (11) can penetrate through the mounting hole of the focusing ring (13) to be matched with a threaded mounting hole of the barrel body (1).