CN-224216956-U - Diffraction optical element, laser, and scanner

CN224216956UCN 224216956 UCN224216956 UCN 224216956UCN-224216956-U

Abstract

The application provides a diffractive optical element, a laser, and a scanner. The diffraction optical element comprises a plurality of beam partitions, and is provided with an incident side and an emergent side, wherein laser light entering the diffraction optical element from the incident side is diffracted by the plurality of beam partitions to form a plurality of beams emitted from the emergent side, and the plurality of beams form at least one linear light spot. The light entering side can be directly connected with laser emitted by the laser source, and the laser of the laser source can be converted into a plurality of light beams forming linear light spots by the light beam partition. Therefore, the number of optical elements of the laser can be reduced to a certain extent, and the complexity of assembling the laser is further improved.

Inventors

CHEN SHANGJIAN
LI XIAONING
ZHENG JUN
WANG JIANGFENG
JIN FENGXIN

Assignees

思看科技(杭州)股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250618

Claims (13)

1. A diffractive optical element for a laser, the diffractive optical element comprising a plurality of beam sections and having an entrance side and an exit side; The laser light entering the diffraction optical element from the light entering side is diffracted by the plurality of beam sections into a plurality of beams emitted from the light emitting side, respectively, and the plurality of beams form at least one linear light spot.
2. The diffractive optical element according to claim 1, characterized in that each beam segment corresponds to one linear spot or each linear spot corresponds to at least one beam segment.
3. The diffractive optical element according to claim 1, wherein each beam section comprises a condensing portion for focusing a light of the laser light and a diffracting portion for diffracting the laser light to form a plurality of beams.
4. A diffractive optical element according to claim 3, characterized in that the diffractive optical element has an entrance surface at the entrance side and an exit surface at the exit side; The light condensing portion and the diffraction portion are integrated between the light incident surface and the light exiting surface, or the light condensing portion and the diffraction portion are integrated on the light incident surface.
5. The diffractive optical element according to claim 3, wherein the light-collecting portion is disposed near the light-emitting side with respect to the diffractive portion, or The diffraction portion is disposed near the light-emitting side with respect to the light-condensing portion.
6. A diffractive optical element according to claim 3, characterized in that the light-gathering part of each beam section is integrally formed with one focusing lens, and the structures of the light-gathering parts are different between the plurality of beam sections.
7. The diffractive optical element according to claim 3, wherein each of the diffractive parts comprises a plurality of diffractive structures, the diffractive optical element being diffracted by the diffractive parts to form a plurality of light beams from the light incident side, wherein the plurality of light beams diffracted by the plurality of diffractive structures of the same diffractive part are used to form one linear spot.
8. The diffractive optical element according to claim 7, wherein the plurality of beam segments form a first alignment direction and the plurality of diffractive structures form a second alignment direction; Wherein the first arrangement direction is perpendicular to the second arrangement direction.
9. The diffractive optical element according to claim 7, characterized in that the plurality of beam segments each comprise the same number of diffractive structures.
10. The diffractive optical element according to claim 8, wherein in the first arrangement direction, the exit angles between the plurality of light beams formed by diffraction of the same light beam section and the light exit surface are the same, and the exit angles between the different light beam sections are different.
11. The diffractive optical element according to claim 1, wherein the plurality of beam segments are configured to form a plurality of juxtaposed linear spots, wherein the plurality of juxtaposed linear spots are equally spaced.
12. A laser comprising the diffractive optical element according to claim 1 to 11.
13. A scanner is characterized in that, comprising the laser of claim 12.

Description

Diffraction optical element, laser, and scanner Technical Field The application relates to the field of optical equipment, in particular to a diffraction optical element, a laser and a scanner. Background In the existing multi-line laser technology, the laser generally includes a laser light source, a lens, a diffraction optical device (DOE, DIFFRACTIVE OPTICAL ELEMENTS), a powell lens, and the like. The light spots emitted by the laser light source enter the DOE for light splitting after being collimated by the lens, and then are stretched into multi-line laser through a column lens, a Powell prism or other aspheric column lenses. The number of laser optical devices is large, and high precision on the relative positions of the laser light source, the DOE and the column lens is required to be ensured. As can be seen, the problem of inability to assemble due to the provision of multiple numbers of optical elements in a laser has not been addressed with an effective solution. Disclosure of utility model Embodiments of the present application provide a diffractive optical element, a laser, and a scanner, which can reduce the number of optical elements of the laser to some extent, thereby reducing the complexity of laser assembly. In a first aspect, embodiments of the present application provide a diffractive optical element for a laser, the diffractive optical element comprising a plurality of beam sections and having an entry side and an exit side; The laser light entering the diffraction optical element from the light entering side is diffracted by the plurality of beam sections into a plurality of beams emitted from the light emitting side, respectively, and the plurality of beams form at least one linear light spot. In a second aspect, embodiments of the present application provide a laser comprising a diffractive optical element as described above. In a third aspect, embodiments of the present application provide a scanner comprising a laser as described above. In the embodiments provided in the present specification, by providing a diffractive optical element in a laser, wherein the diffractive optical element includes a plurality of beam sections and has an incident side and an exit side, laser light incident on the diffractive optical element from the incident side is diffracted by the plurality of beam sections to form a plurality of beams emitted from the exit side, and the plurality of beams form at least one linear spot. The light incidence side can be directly abutted to the laser emitted by the laser source, and the laser of the laser source can be converted into linear light spots by the beam partition and emitted from the light emitting surface, so that the number of optical elements of the laser is reduced, and the problem of laser assembly is further simplified. Drawings Fig. 1 is a schematic structural diagram of a scanner according to an embodiment of the present disclosure. Fig. 2 is a schematic structural diagram of a diffractive optical element according to an embodiment of the present disclosure. Fig. 3 is a schematic view of a linear light spot emitted from a scanner according to an embodiment of the present disclosure. Fig. 4 is a schematic structural diagram of a scanner according to another embodiment of the present disclosure. Description of the reference numerals 100. The light source comprises a diffraction optical element, 103, a light incident surface, 105, a light emergent surface, 110, a light beam partition, 111, a light condensing part, 112, a diffraction part, 113, a diffraction structure, 200, a laser, 210, a housing, 211, a first housing, 212, a second housing, 220, a laser light source, 300 and a scanner. Detailed Description The technical solutions of the embodiments of the present specification will be clearly and completely described below with reference to the drawings of the embodiments of the present specification, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. In this description, the drawings are not necessarily to scale, and local features may be exaggerated or reduced to more clearly show details of the local features. 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 specification belongs. The terminology used in the description is for the purpose of describing particular embodiments only and is not intended to limit the scope of the description. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In the description of the present specification, it should be understood that the terms "first" and "secon