CN215264245U

CN215264245U - Lattice laser system

Info

Publication number: CN215264245U
Application number: CN202121229954.1U
Authority: CN
Inventors: 李瑾; 姜立国
Original assignee: Shenzhen Sanshiguang Technology Co ltd
Current assignee: Shenzhen Sanshiguang Technology Co ltd
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2021-12-21
Anticipated expiration: 2031-06-02

Abstract

The utility model discloses a dot matrix laser system, include: a laser light source for emitting a laser beam; the collimating device is arranged in a beam path of the laser light source and is used for collimating the beams emitted by the laser light source in the fast axis direction and the slow axis direction; the lattice diffraction optical sheet is arranged on one side of the collimating device, which is far away from the laser light source, and is used for splitting the laser collimated by the collimating device to form a group of light beams; the converging lens is arranged on one side of the lattice diffraction optical sheet, which is far away from the collimating device, and is used for collimating a group of light beams passing through the lattice diffraction optical sheet into a group of parallel light beams; the utility model has the advantages of low cost, simple structure, can be miniaturized and can realize micron order dot matrix facula etc. can obtain wide application in portable consumer electronics class product.

Description

Lattice laser system

Technical Field

The utility model relates to a dot matrix laser field especially relates to a dot matrix laser system.

Background

The lattice laser is widely applied to the fields of industry, medical cosmetology and the like as a laser coding method, and the lattice laser technology is the latest and hottest skin cosmetology technology in recent years, is published by laser medical experts of Harvard university in America in 2004, is immediately approved by experts all over the world and is rapidly applied to clinical treatment.

Consumer electronics products refer to electronic devices that are used by individuals on a daily basis, and are commonly used in entertainment, communications, personal care, and office applications. With the penetration of digital life and the improvement of the living standard of consumers, portable consumer electronic products develop at a high speed, and the traditional life style and consumption concept are changed. But the popularization of new products is affected by the aspects of quality, price, service and the like. The conventional dot matrix laser usually adopts technical schemes such as a scanning galvanometer or a micro lens and the like, so that the dot matrix laser is difficult to further popularize and apply in portable consumer electronic products.

1) The laser scanning galvanometer mainly comprises an XY scanning mirror, a field lens, a galvanometer, computer control software and the like. The working principle is that the laser beam is incident on two reflecting mirrors (scanning mirrors), the reflecting angles of the reflecting mirrors are controlled by a computer, and the two reflecting mirrors can respectively scan along X, Y axes, so that the deflection of the laser beam is achieved, and a laser focus point with certain power density moves on a marking material according to the required requirement, thereby leaving vector graphics, characters or dot matrix marks on the surface of the material. The galvanometer scanning marking has the advantages of wide application range, vector pattern marking and dot matrix marking, adjustable marking range, high response speed, high marking speed and the like, is a mainstream product, is considered to represent the development direction of future laser marking, and is widely applied to medium-high-end large-scale medical beauty equipment and industrial processing equipment. However, the structure and the control system are precise and complex, so that the cost is high, the volume is large, and the further popularization and application in portable consumer electronic products are difficult.

2) The micro lens array is an array formed by regularly arranging a plurality of small lenses with the same shape and small size in a row, wherein the small lenses can be in a circular shape, a square shape, a hexagonal shape or other shapes and are arranged into a regular one-dimensional linear lattice structure or a two-dimensional lattice structure to realize laser beam splitting or beam focusing. But the cost is too high due to the large difficulty in processing the micro lens; the application scene is limited due to the small working distance; and the laser light source has more strict requirements, and finally, the application of the laser light source in portable consumer electronic products is limited in partial scenes.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to prior art's the aforesaid because structure and control system are comparatively complicated, the great miniaturization that is difficult to of volume, a great deal of drawback such as with high costs, only use in medium and high-end large-scale medical cosmetic equipment and industrial processing equipment, can't be in the further popularization and application defect of portable consumer electronics class product, provide a low cost, simple structure, can miniaturize and can realize a great deal of advantages such as micron order dot matrix facula, can obtain widely applied dot matrix laser system in portable consumer electronics class product.

The utility model provides a technical scheme that its technical problem adopted is: constructing a lattice laser system comprising:

a laser light source for emitting a laser beam;

the collimating device is arranged in a beam path of the laser light source and is used for collimating the beams emitted by the laser light source in the fast axis direction and the slow axis direction;

the lattice diffraction optical sheet is arranged on one side of the collimating device, which is far away from the laser light source, and is used for splitting the laser collimated by the collimating device to form a group of light beams;

and the converging lens is arranged on one side of the lattice diffraction optical sheet, which is deviated from the collimating device, and is used for collimating a group of light beams passing through the lattice diffraction optical sheet into a group of parallel light beams.

Preferably, the lattice diffraction optical sheet adopts a diffraction optical sheet with a one-dimensional linear lattice structure or a two-dimensional plane lattice structure or an irregular plane lattice structure.

Preferably, the converging lens is disposed at a focal length one-time behind the lattice diffractive optical sheet.

Preferably, the collimating means comprises:

the fast axis collimating lens is arranged in a beam path of the laser light source and is used for collimating the beam emitted by the laser light source in the fast axis direction;

and the slow axis collimating lens is arranged between the fast axis collimating lens and the lattice diffraction optical sheet and is used for collimating the light beam passing through the fast axis collimating lens in the slow axis direction.

Preferably, the collimating device adopts a cylindrical lens or a spherical lens or an aspheric lens.

Preferably, the converging lens comprises a cylindrical lens or a spherical lens or an aspherical lens or a lens group.

The utility model discloses a dot matrix laser system has following beneficial effect: the utility model discloses utilize diffraction optical device unique beam split characteristic, cooperation collimating device, convergent lens can obtain small dot matrix facula on convergent lens's focal plane, the utility model has the advantages of low cost, simple structure, can miniaturize and can realize micron order dot matrix facula etc. can obtain wide application in portable consumer electronics class product.

Drawings

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

fig. 1 is a schematic structural diagram of the lattice laser system of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Exemplary embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be understood that the embodiments and specific features in the embodiments of the present invention are described in detail in the present application, but not limited to the present application, and the technical features in the embodiments and specific features in the embodiments of the present invention can be combined with each other without conflict.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "rear," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, the lattice laser system of the present embodiment includes a laser light source 1, a collimator 2, a lattice diffractive optical sheet 3, and a condensing lens 4, which are arranged in this order from front to back.

Wherein the laser light source 1 is used for emitting a laser beam. In the embodiment of the present invention, the laser light source 1 is a semiconductor laser.

In the embodiment of the invention, for better convenience and miniaturization, and integration, because the light emitted by the semiconductor laser is divergent light, the light beam of the semiconductor laser needs to be collimated and shaped firstly, and therefore, the collimating device 2 is arranged in the light beam path of the laser light source 1 and is used for collimating the light beam emitted by the laser light source 1 in the fast axis direction and the slow axis direction. The fast axis direction is a vertical direction in which the laser light source 1 emits light, and the slow axis direction is a horizontal direction in which the laser light source 1 emits light.

Specifically, in this embodiment, the collimating device 2 includes:

the fast axis collimating lens 21 is arranged in a beam path of the laser light source 1 and is used for collimating the beam emitted by the laser light source 1 in the fast axis direction;

and the slow-axis collimating lens 22 is arranged between the fast-axis collimating lens 21 and the lattice diffraction optical sheet 3 and is used for collimating the light beam passing through the fast-axis collimating lens 21 in the slow-axis direction.

Although the embodiment uses the fast axis collimating lens 21 and the slow axis collimating lens 22 to collimate the divergent light emitted from the laser light source 1 of the semiconductor laser more precisely in the vertical direction and the horizontal direction, it can be understood that a single collimating lens may be used to collimate the divergent light according to practical applications, including but not limited to cylindrical lenses, spherical lenses, and aspheric lenses.

The lattice diffraction optical sheet 3 is arranged on one side of the collimating device 2, which is far away from the laser light source 1, specifically on one side of the slow-axis collimating lens 22, which is far away from the fast-axis collimating lens 21, and is used for splitting the laser collimated by the collimating device 2 to form a group of light beams. Specifically, collimated laser is vertically incident on the lattice diffractive optical sheet 3, and is converted into a plurality of laser beams with uniform energy distribution through the lattice diffractive optical sheet 3, and the laser beams are diverged according to a design angle (the number and the divergence angle are determined by the design of a lattice), wherein each laser beam can keep the beam quality of the original laser beam, namely, each laser beam is still a collimated laser beam, and only the energy of each laser beam can be attenuated in the same proportion with the number of the designed lattice.

Specifically, the lattice diffractive optical sheet 3 is a type of optical element that is based on the principle of diffraction of optical waves, adopts computer-aided design, and is etched on a substrate (or the surface of a conventional optical device) through a semiconductor chip manufacturing process to generate a stepped or continuous relief structure, forming a coaxial reproduction, and having very high diffraction efficiency. The lattice diffraction optical sheet 3 can be designed into a one-dimensional linear lattice structure or a two-dimensional plane lattice structure or other irregular plane lattice structures according to the actual application scene, and the divergence angle of the lattice diffraction optical sheet can be designed according to the area of the application scene.

The converging lens 4 is a large collimating focusing lens, and includes, but is not limited to, a cylindrical lens, a spherical lens, an aspherical lens, and a lens group. The converging lens 4 is arranged on one side of the lattice diffraction optical sheet 3, which is far away from the slow axis collimating lens 22, specifically, is arranged at a focal length position one time behind the lattice diffraction optical sheet 3, and is used for collimating a group of light beams passing through the lattice diffraction optical sheet 3 into a group of parallel light beams. The focal length of one time here refers to the focal length of the selected converging lens 4, and the focal length of the converging lens 4 is calculated depending on the applied scene and the size of the converging light spot finally required. Each collimated laser beam after passing through the converging lens 4 is converged again by the converging lens 4 and forms a converging focus near a back focal plane 5 of the converging lens 4, so that the collimated laser beams form a group of lattice spot structures with tiny sizes on the focal plane 5. Therefore, the focal length behind the convergent lens 4 can be set as the use plane, so that a group of lattice convergent points can be obtained on the use plane, and the size of the lattice light spot can be changed along with the back and forth movement of the use plane.

To sum up, the utility model discloses a dot matrix laser system has following beneficial effect: the utility model discloses utilize diffraction optical device unique beam split characteristic, cooperation collimating device, convergent lens can obtain small dot matrix facula on convergent lens's focal plane, the utility model has the advantages of low cost, simple structure can be miniaturized to can realize a great deal of advantages such as micron order dot matrix facula, can obtain the wide application in portable consumer electronics class product, for example conveniently make portable electronic product at medical cosmetology, fields such as biological detection and industrial production are widely used.

While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A dot matrix laser system, comprising:

a laser light source for emitting a laser beam;

2. The lattice laser system of claim 1, wherein the lattice diffractive optical sheet is a diffractive optical sheet having a one-dimensional linear lattice structure, a two-dimensional planar lattice structure, or an irregular planar lattice structure.

3. The lattice laser system of claim 1, wherein the converging lens is disposed one focal length behind the lattice diffractive optical sheet.

4. The lattice laser system of claim 1, wherein the collimating means comprises:

5. The lattice laser system of claim 1, wherein the collimating means is a cylindrical lens, a spherical lens, or an aspheric lens.

6. The lattice laser system of claim 1, wherein the converging lens comprises a cylindrical lens or a spherical lens or an aspherical lens or a lens group.