CN114421263A

CN114421263A - Large-fan-angle linear laser

Info

Publication number: CN114421263A
Application number: CN202210059345.9A
Authority: CN
Inventors: 蔡震; 陈浩; 吉俊文
Original assignee: Jiangsu Liangdian Photoelectric Technology Co ltd
Current assignee: Jiangsu Liangdian Photoelectric Technology Co ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-04-29

Abstract

The invention provides a large-fan-angle linear laser, which enlarges the angle of a fan angle by splicing two linear optical effects, has simple structure, utilizes engineering operation and has low cost. It includes: a laser; a first Powell prism; the second Powell prism and the beam splitting prism are used for realizing orthogonal direction beam splitting and comprise an incident surface, a beam splitting surface, a first emergent surface and a second emergent surface, and the first emergent surface is vertical to the second emergent surface; the emergent light beam of the laser is parallel light, the emergent light beam of the laser faces the incident surface of the beam splitter prism, the beam splitting surface of the beam splitter prism splits the parallel light into a transmitted light beam and a reflected light beam, the transmitted light beam is emitted to the first emergent surface without changing the angle, and the emitted light beam is emitted to the second emergent surface after vertically changing the direction.

Description

Large-fan-angle linear laser

Technical Field

The invention relates to the technical field of laser, in particular to a large-fan-angle linear laser.

Background

The powell prism is an aspheric cylindrical mirror, the top of the powell prism is a complex two-dimensional aspheric surface curved surface, and when laser passes through the complex two-dimensional aspheric surface curved surface, a large amount of spherical aberration is generated, so that light energy is redistributed, the light energy in the central area is reduced, and the light energy is enhanced to the edge area to form a uniform straight line, as shown in fig. 1, a laser with the optical effect is called a linear laser in the prior art.

The maximum fan angle of the existing linear laser is generally 110-120 degrees, which cannot meet the use requirement of a larger fan angle, when a linear with a larger fan angle is needed, two or more linear lasers are needed to be spliced and assembled, the positioning accuracy cannot be reliably ensured, and therefore, a linear laser with a large fan angle is urgently needed to be developed.

Disclosure of Invention

In view of the above problems, the present invention provides a large-fan-angle in-line laser, which enlarges the fan angle by splicing the optical effects of two in-line lines, and has the advantages of simple structure, engineering operation utilization, and low cost.

A large fan angle in-line laser, comprising:

a laser;

a first Powell prism;

second Powell prism

The light splitting prism is used for realizing orthogonal direction light splitting and comprises an incident surface, a light splitting surface, a first emergent surface and a second emergent surface, wherein the first emergent surface is vertical to the second emergent surface;

the emergent light beam of the laser is parallel light, the emergent light beam of the laser faces to the incident surface of the beam splitter prism, the beam splitting surface of the beam splitter prism splits the parallel light into a transmitted light beam and a reflected light beam, the angle of the transmitted light beam is unchanged, the transmitted light beam is emitted to the first emergent surface, and the emitted light beam is emitted to the second emergent surface after being vertically changed;

the rear end of the first emergent surface is provided with a first Bawell prism, the transmission light beam of the first emergent surface is arranged towards the incident curved surface of the first Bawell prism, and the emergent surface of the first Bawell prism forms a first horizontal linear light beam;

a second Powell prism is arranged on the rear side of the second emergent surface, a reflected light beam of the second emergent surface is arranged towards an incident curved surface of the second Powell prism, and a second first line light beam is formed on the emergent surface of the second Powell prism;

and the first word line beam and the second first word line beam are combined to form an output word line beam.

It is further characterized in that:

the transmission light beam generates a first linear light beam with a fan angle of M degrees after being incident on the first Baville prism, and the reflection light beam generates a second linear light beam with a fan angle of N degrees after being incident on the second Baville prism;

when M, N is larger than right angle, the two word line beams are spliced to generate a word line beam with a large fan angle exceeding the straight angle;

when M, N is smaller than the right angle, the two word line beams are spliced to generate a large fan-angle word line beam with a gap in the middle and exceeding the right angle;

the inverse transmission ratio of the beam splitter prism is 50: 50.

After the structure of the invention is adopted, in one system, two groups of the first word line optical effects are spliced, so that the fan angle of the first word line laser exceeds a straight angle, or the large fan angle first word line optical effect exceeding a right angle with a gap in the middle is generated, and the splicing and positioning of two or more groups of the first word line lasers are not needed to be carried out subsequently, thereby improving the positioning accuracy; the angle of the fan angle is enlarged by splicing the two word lines through the optical effect, the structure is simple, engineering operation is utilized, and the cost is low.

Drawings

FIG. 1 is a schematic diagram of a Powell prism generating a word line optical effect;

FIG. 2 is an optical schematic of the present invention;

FIG. 3 is a schematic diagram of the assembly structure of the present invention;

the names corresponding to the sequence numbers in the figure are as follows:

the laser device comprises a laser device 10, a first Powell prism 20, a second Powell prism 30, a beam splitting prism 40, an incident surface 41, a beam splitting surface 42, a first emergent surface 43, a second emergent surface 44, a first word line light beam 50, a second word line light beam 60, a shell 70 and a word line emergent opening 71.

Detailed Description

A large-fan-angle in-line laser, see fig. 2-3, which comprises a laser 10, a first powell prism 20, a second powell prism 30, and a beam splitter prism 40;

the beam splitter prism 40 is used for realizing orthogonal beam splitting, the beam splitter prism 40 comprises an incident surface 41, a beam splitting surface 42, a first exit surface 43 and a second exit surface 44, and the first exit surface 43 is arranged perpendicular to the second exit surface 44;

the outgoing beam of the laser 10 is parallel light, the outgoing beam of the laser 10 is arranged towards the incident surface 41 of the beam splitter prism 40, the beam splitting surface 42 of the beam splitter prism 40 splits the parallel light into a transmitted beam and a reflected beam, the transmitted beam is emitted to the first outgoing surface 43 with a constant angle, and the transmitted beam is emitted to the second outgoing surface 44 after being vertically changed;

the rear end of the first exit surface 43 is provided with a first powell prism 20, the transmitted light beam of the first exit surface 43 is arranged towards the incident curved surface of the first powell prism 20, and the exit surface of the first powell prism 20 forms a first horizontal linear light beam 50;

a second powell prism 30 is arranged at the rear side of the second exit surface 44, the reflected light beam of the second exit surface 44 is arranged towards the incident curved surface of the second powell prism 30, and the exit surface of the second powell prism 30 forms a second first word line light beam 60;

the first wordline beam 50 and the second first wordline beam 60 combine to form an output wordline beam.

The transmitted beam is incident on the first powell prism 20 to generate a first word line beam 50 with a fan angle of M degrees, and the reflected beam is incident on the second powell prism 30 to generate a second first word line beam 60 with a fan angle of N degrees;

when M, N are both smaller than a right angle, the two word line beams pass through the splice, producing a large fan angle word line beam that exceeds the right angle with a gap in the middle.

In specific implementation, the inverse transmission ratio of the beam splitter prism is 50: 50; the light beam emitted by the laser 10 is circular; the Powell prism 20 is an aspheric cylindrical mirror;

in specific implementation, the laser device further comprises a device housing 70, the laser device 10, the first powell prism 20, the second powell prism 30, and the beam splitter prism 40 are disposed in an inner cavity of the device housing 70, and the device housing 70 is provided with a word line ejection port 71.

In the specific embodiment, the wavelength of the laser 10 is 532 nm; the light beam emitted by the laser 10 is a parallel light beam, and the diameter phi of the light beam is 2 mm; the inverse ratio of the beam splitter prism 40 transmission is 50: 50; the first Powell prism 20 generates a fan angle of 100 degrees, and forms a word line with a width of about 2mm at a distance of 2m-5 m; the second Powell prism generates a fan angle of 100 degrees, and a word line with the width of about 2mm is formed at the distance of 2m-5 m; after the first Powell prism 20 and the second Powell prism 30 are spliced by a word line light beam, the fan angle can reach 190 degrees, and a word line with the width of about 2mm is formed at a distance of 2m-5 m.

The working principle is as follows, in one system, two groups of one-word line optical effects are spliced, so that the fan angle of one-word line laser exceeds a straight angle, or the large fan angle one-word line optical effect exceeding a right angle with a gap in the middle is generated, the splicing and positioning of two or more groups of one-word line lasers are not needed in the follow-up process, and the positioning accuracy is improved.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A large fan angle in-line laser, comprising:

a laser;

a first Powell prism;

second Powell prism

2. The large fan angle, in-line laser of claim 1, wherein: the transmission light beam is incident on the first Baville prism to generate a first word line light beam with a fan angle of M degrees, and the reflection light beam is incident on the second Baville prism to generate a second first word line light beam with a fan angle of N degrees.

3. A large fan angle, in-line laser as claimed in claim 2, wherein: when M, N are both larger than a right angle, the two word line beams pass through the splice, creating a large fan angle word line beam that exceeds a straight angle.

4. A large fan angle, in-line laser as claimed in claim 2, wherein: when M, N are both smaller than a right angle, the two word line beams pass through the splice, producing a large fan angle word line beam that exceeds the right angle with a gap in the middle.

5. The large fan angle, in-line laser of claim 1, wherein: the inverse transmission ratio of the beam splitter prism is 50: 50.