CN112448265A

CN112448265A - Dual-wavelength laser

Info

Publication number: CN112448265A
Application number: CN202011333897.1A
Authority: CN
Inventors: 周斌; 邢明明
Original assignee: Xi'an Bogao Photoelectric Technology Co ltd
Current assignee: Xi'an Bogao Photoelectric Technology Co ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-03-05

Abstract

The invention belongs to the field of laser, and particularly relates to a dual-wavelength laser. The laser beam emitted by the first pumping source passes through the first collimating mirror and then strikes the first reflecting mirror, and the laser beam reflected by the first reflecting mirror is reflected by the second reflecting mirror to enter the light splitting sheet and is refracted and output through the light splitting sheet; a second collimating mirror and a third reflecting mirror are sequentially arranged along the laser emission direction of the second pumping source, the laser emitted by the second pumping source passes through the second collimating mirror and then strikes the second reflecting mirror, and the laser reflected by the second reflecting mirror is reflected and output through the beam splitter again; and the laser refracted by the light splitting sheet and the laser reflected by the light splitting sheet are concentrically and coaxially output. The invention ensures the concentric and coaxial output of the dual-wavelength laser only through the action of the reflector and the beam splitter.

Description

Dual-wavelength laser

Technical Field

The invention belongs to the field of laser, and particularly relates to a dual-wavelength laser.

Background

The solid laser has a plurality of types, is widely applied in the market, and is particularly applied to point-shaped solid lasers in aspects of indication, collimation, aiming and the like, such as laser pens, pointing star pens, gun aiming and the like.

At present, most of small-sized products such as a gun sight or a laser pen on the market have single wavelength, and only one color can be emitted for indication. A single wavelength, such as 530nm for green, has the disadvantage that when indicating a green colored object, the indication point is not apparent.

At present, double-wavelength or multi-wavelength lasers in the market also have the problems of poor concentricity, large size and the like.

As in the Chinese patent: CN201921732425.6 discloses a dual-fiber coupled output laser, which comprises a dual-wavelength semiconductor laser, wherein the dual-wavelength semiconductor laser emits laser beams with two wavelengths which are arranged at intervals to form an array; laser beams with one wavelength are respectively incident to the same converging lens I through respective reflectors I, and the converging lens I and the independent optical fiber I are coaxially mounted through the converging lens and the optical fiber fixing frame I; laser beams with another wavelength are respectively incident to the same converging lens II through respective reflectors II, and the converging lens II is coaxially mounted with the independent optical fiber II through the converging lens and the optical fiber fixing frame II. The invention provides a semiconductor laser with double optical fiber coupling output, which can effectively reduce the volume of a high-lumen pure laser light source, reduce the cost and eliminate speckles.

However, the dual-wavelength light of the patent is not coaxial, and when the dual-wavelength light is used for indicating, collimating and aiming, two light spots appear, so that accurate indicating, collimating and aiming cannot be achieved.

Disclosure of Invention

The invention provides a dual-wavelength laser. The invention aims to solve the defect of non-coaxial dual-wavelength light in the prior art.

The invention is realized by the following technical scheme:

a dual-wavelength laser comprises two pumping sources, two collimating mirrors, three reflecting mirrors and a beam splitter, wherein the pumping source I and the pumping source II are arranged in parallel;

the laser beam emitted by the first pumping source passes through the first collimating mirror and then strikes the first reflecting mirror, and the laser beam reflected by the first reflecting mirror is reflected by the second reflecting mirror to enter the light splitting sheet and is refracted and output through the light splitting sheet;

a second collimating mirror and a third reflecting mirror are sequentially arranged along the laser emission direction of the second pumping source, the laser emitted by the second pumping source passes through the second collimating mirror and then strikes the second reflecting mirror, and the laser reflected by the second reflecting mirror is reflected and output through the beam splitter again;

and the laser refracted by the light splitting sheet and the laser reflected by the light splitting sheet are concentrically and coaxially output.

Further, the first mirror and the third mirror are both reflected towards a symmetry line between the first pump source and the second pump source.

Further, the transmittance of the light splitting sheet is 20% -80%.

Further, the light splitter is arranged by inclining for 45 degrees, and the reflector is arranged by inclining for 30 degrees to 60 degrees.

Further, the light splitting sheet and the reflecting mirror are arranged in an inclined mode by 45 degrees.

The device comprises a lower shell and an upper shell, wherein two cylindrical holes are formed in the lower shell, the cylindrical holes are used for arranging a pumping source and a collimating mirror, the upper shell is arranged at one end, close to the collimating mirror, of the lower shell, four connecting holes are formed in the upper shell, the four connecting holes are arranged in parallel, and the four connecting holes are perpendicular to a step hole; reflectors are arranged in the three connecting holes, and one is provided with a light splitting piece.

Furthermore, the four connecting holes are respectively a first connecting hole, a second connecting hole, a third connecting hole and a fourth connecting hole, the first connecting hole is located on a laser light path emitted by the first pumping source, the third connecting hole is located on a laser light path emitted by the second pumping source, and the second connecting hole and the fourth connecting hole are located between the first connecting hole and the third connecting hole.

Furthermore, the central connecting line of the second connecting hole and the fourth connecting hole is parallel to the light path.

Further, still include the shell body, the shell body sets up outside last shell body, and with lower shell body coupling.

By adopting the technical scheme, the invention has the following advantages:

1. the invention can realize the dual-wavelength laser output only by arranging two pumping sources, two collimating mirrors, three reflecting mirrors and one beam splitter, uses less equipment, reduces the weight and the volume of the laser and obtains the miniaturized dual-wavelength laser. Meanwhile, the concentric and coaxial output of the dual-wavelength laser can be ensured only through the action of the reflector and the light splitting sheet.

2. The invention can emit light with two different wavelengths simultaneously, thereby avoiding the problem of unclear indication caused by the color emphasis of the laser color and the indication position; and the light with two wavelengths is concentric and coaxial, so that the problem of different spot indication positions formed by the two wavelengths of light which can be seen by naked eyes can not occur.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a first schematic structural diagram of the lower housing of the present invention;

FIG. 3 is a second schematic structural view of the lower housing of the present invention;

FIG. 4 is a first schematic structural diagram of the outer casing of the present invention;

FIG. 5 is a second schematic structural view of the outer case of the present invention;

FIG. 6 is a first schematic structural diagram according to an embodiment of the present invention;

FIG. 7 is a second schematic structural diagram according to an embodiment of the present invention;

FIG. 8 is a third schematic structural diagram in accordance with an embodiment of the present invention;

FIG. 9 is a fourth schematic structural diagram according to an embodiment of the present invention;

in the drawings: 1. the device comprises a first pumping source, a second pumping source, a first collimating mirror, a second collimating mirror, a first reflecting mirror, a second reflecting mirror, a third reflecting mirror, a lower shell, 10, a cylindrical hole, 11, an upper shell, 12, a first connecting hole, 13, a second connecting hole, 14, a third connecting hole, 15, a fourth connecting hole, 16, an outer shell, 17, a connecting frame, 18, a small end cover, 19 and a large end cover.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it should be noted that when an element is referred to as being "fixed" or "disposed" to another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

As shown in fig. 1, the present invention provides a dual wavelength laser, which includes two pumping sources, two collimating mirrors, three reflecting mirrors and a beam splitter 5, wherein the pumping source one 1 and the pumping source two 6 are arranged in parallel;

the laser beam splitter comprises a first collimating mirror 2 and a first reflecting mirror 3 which are sequentially arranged along the laser emission direction of a first pumping source 1, wherein laser emitted by the first pumping source 1 passes through the first collimating mirror 2 and then strikes the first reflecting mirror 3, and the laser reflected by the first reflecting mirror 3 is reflected by a second reflecting mirror 4 again to enter a light splitting sheet 5 and is refracted and output through the light splitting sheet 5;

a second collimating mirror 7 and a third reflecting mirror 8 are sequentially arranged along the laser emission direction of the second pumping source 6, the laser emitted by the second pumping source 6 passes through the second collimating mirror 7 and then strikes the second reflecting mirror 4, and the laser reflected by the second reflecting mirror 4 is reflected and output through the beam splitter 5 again;

and the laser refracted by the light splitting sheet 5 and the laser reflected by the light splitting sheet 5 are concentrically and coaxially output.

As in fig. 1, a light path diagram of the present invention is shown.

The reflecting mirror is a kind of optical lens with plane reflection function, and for example, a beam splitter can also be used as the reflecting mirror.

Further, the mirror one 3 and the mirror three 8 are both reflected toward the symmetry line between the pump source one 1 and the pump source two 6. It can be understood that, as shown in fig. 1, the first mirror 3 reflects the laser light downwards, and the second mirror 4 reflects the laser light upwards, so as to ensure that the optical path of the laser light emitted by the beam splitter 5 is located between the optical paths of the laser light emitted by the first pump source 1 and the second pump source 6, i.e. as shown in fig. 1. Because the laser light path emitted by the light splitting sheet 5 is positioned between the laser light paths emitted by the pumping source I1 and the pumping source II 6, the transverse width of the laser can be ensured to be minimum.

Of course, it is preferred that mirror one 3 and mirror three 8 both face the line of symmetry between pump source one 1 and pump source two 6.

Further, the transmittance of the spectroscopic sheet 5 is 20% to 80%.

Further, the light splitter 5 is arranged by inclining for 45 degrees, and the reflector is arranged by inclining for 30 degrees to 60 degrees. The light splitter 5 is inclined by 45 degrees to avoid the light output by the light splitter 5 from forming stray spots.

Further, the light splitter 5 and the reflector are both inclined at 45 °. The tilting is to be understood as meaning that the beam splitter 5 and the mirror are tilted relative to the beam path of the laser light emitted by the pump source. As shown in fig. 1, the 45 ° inclined spectroscope 5 and the reflector do not mean that the inclination direction of the spectroscope 5 and the reflector is the same, but means that the acute angle at which the spectroscope 5 and the reflector are inclined is 45 °. The 45-degree inclined light splitting sheet 5 and the reflecting mirror can meet the optimal concentric and coaxial inclination angle of the dual-wavelength light, and the setting position of the reflecting mirror and the light splitting sheet 5 is convenient to control. Because of the inclination angle, as shown in fig. 1, the light path between the first reflector 3 and the second reflector 4 is ensured to be perpendicular to the light path between the second reflector 4 and the beam splitter 5, and then the third reflector 8 is moved left and right until the light paths reflected and refracted by the beam splitter 5 are concentric and coaxial, so that the position can be determined.

The connection line of the first mirror 3 and the second mirror 4 is understood to be the connection line of the laser receiving position of the first mirror 3 and the laser receiving position of the second mirror 4.

As shown in fig. 2 and 3, the optical fiber bundle further comprises a lower shell 9 and an upper shell 11, two cylindrical holes 10 are formed in the lower shell 9, the cylindrical holes 10 are used for arranging a pumping source and a collimating mirror, the upper shell 11 is arranged at one end, close to the collimating mirror, of the lower shell 9, four connecting holes are formed in the upper shell 11, the four connecting holes are arranged in parallel, and the four connecting holes are perpendicular to the step hole; reflectors are arranged in the three connecting holes, and one is provided with a light splitting sheet 5.

Four of the connecting holes are arranged in parallel, it should be understood that any two connecting holes are arranged in parallel, and it does not mean that the four connecting holes are located on the same plane.

It should be noted that, of course, the upper housing 11 can satisfy that the laser energy reflected by the first reflector 3 is reflected by the second reflector 4 and enters the beam splitter 5, and the laser energy reflected by the third reflector 8 is reflected by the beam splitter 5, and meanwhile, the laser output by the reflection of the beam splitter 5 and the laser output by the refraction are concentric and coaxial. I.e. the upper housing 11 must have a light path therein.

Further, the four connecting holes are respectively a connecting hole I12, a connecting hole II 13, a connecting hole III 14 and a connecting hole IV 15, the connecting hole I12 is located on a laser light path emitted by the pumping source I1, the connecting hole III 14 is located on a laser light path emitted by the pumping source II 6, and the connecting hole II 13 and the connecting hole IV 15 are located between the connecting hole I12 and the connecting hole III 14. The arrangement mode can ensure that the whole volume of the laser is minimized.

Further, the central connecting line of the second connecting hole 13 and the fourth connecting hole 15 is parallel to the light path. After the beam splitter 5 and the reflector are arranged, the dual-wavelength laser concentric and coaxial output can be ensured only by adjusting the inclination angle.

As shown in fig. 4 and 5, the portable electronic device further comprises an outer shell 16, wherein the outer shell 16 is arranged outside the upper shell 11 and connected with the lower shell 9. The outer case 16 also has an emission hole for outputting the laser light of the two wavelengths.

Further, the pump source and the collimator lens are shown fixed in the lower housing 9 by a connecting frame 17. As shown in fig. 6, it is a schematic structural view of the connecting frame 17; the connecting frame 17 is cylindrical, a step hole is formed in the connecting frame 17, as shown in fig. 7, the pumping source and the collimating mirror are positioned and installed through the step of the step hole, and the pumping source and the collimating mirror can be fixed in a dispensing mode after being installed in the connecting frame 17.

Through the connection of the connecting frame 17, the relative position of the pumping source and the collimating lens can be fixed firstly, the lower shell 9 is more convenient to install, and the installation accuracy can be ensured.

As shown in fig. 7, a small end cap 18 is further disposed in the connecting frame 17, and the pump source is fixed by the small end cap 18.

As shown in fig. 8 and 9, the lower case 9 is further provided with a connecting groove, and a large end cap 19 is arranged in the connecting groove. The large end cap 19 can be used to secure the connecting frame 17 and also to perform the function of encapsulation.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A dual wavelength laser, comprising: the device comprises two pumping sources, two collimating mirrors, three reflecting mirrors and a light splitting sheet (5), wherein the pumping source I (1) and the pumping source II (6) are arranged in parallel;

the laser beam splitter comprises a first collimating mirror (2) and a first reflecting mirror (3) which are sequentially arranged along the laser emission direction of a first pumping source (1), wherein laser emitted by the first pumping source (1) passes through the first collimating mirror (2) and then impinges on the first reflecting mirror (3), and the laser reflected by the first reflecting mirror (3) is reflected by a second reflecting mirror (4) again to enter a light splitting sheet (5) and is refracted and output through the light splitting sheet (5);

a second collimating mirror (7) and a third reflecting mirror (8) are sequentially arranged along the laser emission direction of the second pumping source (6), laser emitted by the second pumping source (6) passes through the second collimating mirror (7) and then impinges on the second reflecting mirror (4), and the laser reflected by the second reflecting mirror (4) is reflected and output through the beam splitter (5);

the laser refracted by the light splitting sheet (5) and the laser reflected by the light splitting sheet (5) are concentrically and coaxially output.

2. A dual wavelength laser as defined in claim 1 wherein: and the first reflecting mirror (3) and the third reflecting mirror (8) both reflect towards a symmetrical line between the first pumping source (1) and the second pumping source (6).

3. A dual wavelength laser as defined in claim 1 wherein: the transmittance of the light splitting sheet (5) is 20-80%.

4. A dual wavelength laser as defined in claim 1 wherein: the light splitting sheet (5) is inclined by 45 degrees, and the reflector is inclined by 30-60 degrees.

5. A dual wavelength laser as claimed in claim 4 wherein: the light splitting sheet (5) and the reflector are inclined by 45 degrees.

6. A dual wavelength laser as defined in claim 1 wherein: the device is characterized by further comprising a lower shell (9) and an upper shell (11), wherein two cylindrical holes (10) are formed in the lower shell (9), the cylindrical holes (10) are used for arranging a pumping source and a collimating mirror, the upper shell (11) is arranged at one end, close to the collimating mirror, of the lower shell (9), four connecting holes are formed in the upper shell (11), the four connecting holes are arranged in parallel, and the four connecting holes are perpendicular to the step hole; reflectors are arranged in the three connecting holes, and one is provided with a light splitting sheet (5).

7. A dual wavelength laser as defined in claim 6 wherein: the four connecting holes are respectively a connecting hole I (12), a connecting hole II (13), a connecting hole III (14) and a connecting hole IV (15), the connecting hole I (12) is located on a laser light path emitted by the pumping source I (1), the connecting hole III (14) is located on a laser light path emitted by the pumping source II (6), and the connecting hole II (13) and the connecting hole IV (15) are located between the connecting hole I (12) and the connecting hole III (14).

8. A dual wavelength laser as defined in claim 7 wherein: and the central connecting line of the second connecting hole (13) and the fourth connecting hole (15) is parallel to the light path.

9. A dual wavelength laser as defined in claim 6 wherein: the shell body (16) is arranged outside the upper shell body (11) and connected with the lower shell body (9).