CN214379241U - Laser device - Google Patents
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- CN214379241U CN214379241U CN202120423393.2U CN202120423393U CN214379241U CN 214379241 U CN214379241 U CN 214379241U CN 202120423393 U CN202120423393 U CN 202120423393U CN 214379241 U CN214379241 U CN 214379241U
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Abstract
The present application relates to a laser, wherein the laser comprises a laser beam generating unit, a beam adjusting unit and an optical scribing unit; the light beam adjusting unit is arranged on a light path between the laser beam generating unit and the optical scribing unit; the laser beam generating unit is used for generating a first laser beam; the light beam adjusting unit comprises a flat hole, the flat hole is used for limiting the light transmission amount of a second laser beam incident to the optical scribing unit from the first laser beam, the optical scribing unit is used for expanding the second laser beam into a projectable linear laser line, and by the laser device, the problem that the depth of field of the laser device cannot be changed is solved, the depth of field range of the laser device is improved, the front-back distance of laser device scanning is increased, and the scanning precision of the laser device is improved.
Description
Technical Field
The present application relates to the field of three-dimensional scanning, and more particularly to lasers.
Background
In the field of three-dimensional scanning, a laser, which mainly includes a diode, a lens, a prism, and a diffractive optical element, can perform three-dimensional scanning of a measurement object by emitting laser lines. The light emitting diode is used as a light emitting device and mainly outputs light with a fixed wavelength, the lens is mainly used for converging the light emitted by the light emitting diode, the prism is mainly used for processing light spots focused by the lens into a straight line, and the diffraction optical element is mainly used for splitting a single point or line into multiple points or multiple lines.
The field depth range of the existing laser is mainly determined by the size of a light-emitting angle of a diode and the size of a focal length of a lens, and the field depth of the laser cannot be changed under the condition of selecting the type and the focal length of the diode.
At present, no effective solution is provided for the problem that the depth of field of a laser in the related art cannot be changed.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a laser to at least solve the problem that the depth of field of the laser cannot be changed in the related art.
In a first aspect, an embodiment of the present application provides a laser, where the laser includes:
a laser beam generating unit, a beam adjusting unit and an optical scribing unit; the light beam adjusting unit is arranged on an optical path between the laser beam generating unit and the optical scribing unit; the laser beam generating unit is used for generating a first laser beam; the beam adjusting unit comprises a flat hole, the flat hole is used for limiting the light flux of a second laser beam incident to the optical scribing unit from the first laser beam, and the optical scribing unit is used for expanding the second laser beam into a projectable linear laser line.
In some of these embodiments, the flat hole has a major axis and a minor axis perpendicular to each other, the direction of the major axis being parallel to the laser plane corresponding to the line laser line.
In some embodiments, the laser beam generation unit includes a point light source generation unit and an optical processing unit for processing the light beam emitted from the point light source generation unit into the first laser beam.
In some of these embodiments, the point light source generating unit comprises a laser diode; the optical processing unit comprises a lens having an optical focusing effect.
In some embodiments, the laser further includes a first fixing member, the beam adjusting unit is integrally formed with the first fixing member, and the first fixing member is configured to fix the optical processing unit and the optical scribing unit and maintain a separation distance between the optical processing unit and the optical scribing unit.
In some embodiments, the first fixing member is a cylinder, an optical path channel is formed inside the cylinder, a first limiting groove and a second limiting groove are respectively formed at two ends of the first fixing member, and the first limiting groove and the second limiting groove respectively fix the optical processing unit and the optical scribing unit in the optical path channel.
In some embodiments, the laser further includes a second fixing member for fixing the optical processing unit, the beam adjusting unit and the optical scribing unit and maintaining a spaced distance between the optical processing unit and the optical scribing unit.
In some embodiments, the second fixing member includes a first fixing component and a second fixing component, the first fixing component and the second fixing component cooperate with each other to form the optical path channel, an inner wall of the first fixing component and an inner wall of the second fixing component are circumferentially provided with a third limiting groove, a fourth limiting groove and a fifth limiting groove, and the third limiting groove, the fourth limiting groove and the fifth limiting groove respectively fix the optical processing unit, the beam adjusting unit and the optical scribing unit in the optical path channel.
In some of these embodiments, the laser further comprises: the shielding piece and the light beam adjusting unit are made of the same material and are connected through metal glue or welding rods, and the length of the short shaft of the flat hole is reduced through the shielding piece.
In some of these embodiments, the material of the beam modification unit is aluminum.
In some embodiments, the second fixing member is a cylinder, an optical path channel is formed inside the cylinder, a sixth limiting groove and a seventh limiting groove are respectively formed at two ends of the second fixing member, the sixth limiting groove and the seventh limiting groove respectively fix the optical processing unit and the optical scribing unit in the optical path channel, an eighth limiting groove is formed between two ends of the second fixing member, and the eighth limiting groove fixes the beam adjusting unit in the optical path channel.
In some embodiments, the second fixing member further comprises a limiting structure capable of preventing the optical processing unit from rotating along the axial direction of the fixing member; and/or
The second fixing piece also comprises a limiting structure capable of preventing the light beam adjusting unit from rotating along the axial direction of the fixing piece; and/or
The second fixing piece further comprises a limiting structure capable of preventing the optical scribing unit from rotating along the axial direction of the fixing piece.
In some embodiments, the laser further includes a sliding pair, the sliding pair includes a first sliding component and a second sliding component that can move relatively along a straight line where the light path is located, the first sliding component is connected with the second fixing component, and the second sliding component is connected with the point light source generating unit.
In some of these embodiments, the flat holes include kidney-shaped holes and rectangular holes.
In some of these embodiments, the optical scribing unit comprises a powell prism.
In some of these embodiments, the beam adjustment unit comprises a diaphragm.
In a second aspect, embodiments of the present application provide a three-dimensional laser scanner comprising a laser as described in the first aspect above.
Compared with the related art, the laser provided by the embodiment of the application comprises a laser beam generating unit, a beam adjusting unit and an optical scribing unit; the light beam adjusting unit is arranged on an optical path between the laser beam generating unit and the optical scribing unit; the laser beam generating unit is used for generating a first laser beam; the light beam adjusting unit comprises a flat hole, the flat hole is used for limiting the light transmission amount of a second laser beam which is emitted to the optical scribing unit by the first laser beam, the optical scribing unit is used for expanding the second laser beam into a projectable linear laser line, the problem that the depth of field of the laser cannot be changed is solved, the depth of field range of the laser is improved, the front-rear distance of laser scanning is increased, and the scanning precision of the laser is improved.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a first schematic view of a flat hole according to an embodiment of the present invention;
FIG. 2 is a second schematic view of a flat hole according to an embodiment of the present invention;
fig. 3 is a first schematic structural diagram of a laser according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of a laser structure according to an embodiment of the present invention;
fig. 5 is a cross-sectional view of a laser structure according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference herein to "a plurality" means greater than or equal to two. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
In this embodiment, a laser is provided, including:
a laser beam generating unit, a beam adjusting unit and an optical scribing unit; the light beam adjusting unit is arranged on a light path between the laser beam generating unit and the optical scribing unit; the laser beam generating unit is used for generating a first laser beam; the beam adjusting unit comprises a flat hole used for limiting the light flux of a second laser beam incident to the optical scribing unit from the first laser beam, and the optical scribing unit is used for expanding the second laser beam into a projectable linear laser line.
In this embodiment, the first laser beam forms a light spot at the beam adjusting unit, the light spot has a long axis and a short axis perpendicular to each other, the short axis of the light spot is parallel to the short axis of the flat hole, and the length of the short axis of the flat hole is smaller than that of the light spot, for example, if the length of the short axis of the light spot is 0.5 cm, the length of the short axis of the flat hole is smaller than 0.5 cm.
It should be noted that, the flat hole has a length and a width, which are respectively marked as h and k, fig. 1 is a first schematic diagram of the flat hole according to an embodiment of the present invention, fig. 2 is a second schematic diagram of the flat hole according to an embodiment of the present invention, as shown in fig. 1 and fig. 2, the length h of the flat hole is greater than the width k of the flat hole, and the shape of the flat hole here includes but is not limited to the embodiments of fig. 1 and fig. 2.
In the above manner, the laser beam generating unit is used for generating a first laser beam; the light beam adjusting unit is arranged on a light path between the laser beam generating unit and the optical scribing unit; the light beam adjusting unit comprises a flat hole, the flat hole is used for limiting the light transmission amount of a second laser beam which is emitted into the optical scribing unit by the first laser beam, the optical scribing unit is used for expanding the second laser beam into a projectable linear laser line, the depth of field range of the laser is improved, the front-back distance of laser scanning is increased, and the scanning precision of the laser is improved.
In some of these embodiments, the flat hole has a major axis and a minor axis perpendicular to each other, with the direction of the major axis being parallel to the laser plane corresponding to the linear laser line.
In some embodiments, the laser beam generating unit includes a point light source generating unit and an optical processing unit for processing the light beam emitted from the point light source generating unit into the first laser beam.
By the mode, the light beam emitted by the point light source generating unit is processed into the first laser beam through the optical processing unit, so that the light beam emitted by the point light source is converted into the corresponding first laser beam.
In some of these embodiments, the point light source generating unit includes a laser diode; the optical processing unit comprises a lens having an optical focusing effect.
By the mode, the umbrella-shaped light beams emitted by the point light source generating unit are converged.
In some embodiments, the laser further includes a first fixing member, the beam adjusting unit is integrally formed with the first fixing member, and the first fixing member is configured to fix the optical processing unit and the optical scribing unit and maintain a distance between the optical processing unit and the optical scribing unit.
In the present embodiment, changing the separation distance between the optical processing unit and the optical scribing unit affects the quality of the multi-line laser scanning, and therefore, in the present embodiment, the separation distance between the optical processing unit and the optical scribing unit is fixed.
Through the mode, the light beam limiting unit and the first fixing piece are integrally formed, the number of external metal supporting structures is reduced, and the optical processing unit and the optical scribing unit are fixed.
In some embodiments, the first fixing member is a cylinder, the inside of the cylinder forms a light path channel, two ends of the first fixing member are respectively provided with a first limiting groove and a second limiting groove, and the first limiting groove and the second limiting groove respectively fix the optical processing unit and the optical scribing unit in the light path channel.
Through the mode, the optical processing unit and the optical scribing unit are fixed in the optical path channel through the first limiting groove and the second limiting groove respectively, and the optical processing unit and the optical scribing unit are fixed.
In some embodiments, the laser further comprises a second fixing member for fixing the optical processing unit, the beam adjusting unit and the optical scribing unit and maintaining a separation distance between the optical processing unit and the optical scribing unit.
Through the mode, the optical processing unit, the light beam adjusting unit and the optical scribing unit are fixed.
Fig. 3 is a schematic structural diagram of a laser according to the embodiment of the present invention, as shown in fig. 3, the second fixing member includes a first fixing component 301 and a second fixing component 302, the first fixing component 301 and the second fixing component 302 cooperate with each other to form an optical path channel, a third limiting groove 303, a fourth limiting groove 304 and a fifth limiting groove 305 are circumferentially disposed on inner walls of the first fixing component 301 and the second fixing component 302, and the third limiting groove 303, the fourth limiting groove 304 and the fifth limiting groove 305 fix the optical processing unit 306, the beam adjusting unit 307 and the optical scribing unit 308 in the optical path channel respectively.
Through the mode, the optical processing unit, the optical scribing unit and the light beam adjusting unit are fixed in the light path channel, the assembling structure is reduced, the assembling efficiency is improved, and the line forming quality is improved.
In some of these embodiments, the laser further comprises: the shielding piece and the light beam adjusting unit are made of the same material and are connected through metal glue or welding rods, and the length of the short shaft of the flat hole is reduced through the shielding piece.
In this embodiment, when finding that the short axis length of the flat hole is not suitable for an application scenario, the short axis length of the flat hole may be reduced by using a shielding sheet, for example, the short axis length of the original flat hole is 0.5 cm, the depth of field is 100, and the length of the short axis of the flat hole needs to be changed if the depth of field needs to be increased.
By the mode, the shielding piece is connected with the light beam adjusting unit through the metal glue or the welding electrode, and the length of the short shaft of the flat hole in the optical limiting unit is changed.
In some of these embodiments, the material of the beam modification unit is aluminum.
It should be noted that the aluminum profile has good casting performance, can be processed into aluminum profiles with different shapes, has good surface treatment performance and bright appearance color, has strong plasticity and good productivity of aluminum shapes compared with other metal materials, and has good advantages for production and manufacture.
Fig. 4 is a first cross-sectional view of a laser structure according to an embodiment of the present invention, as shown in fig. 4, the second fixing member 401 is a cylinder, the inside of the cylinder forms a light path channel, a sixth limiting groove 402 and a seventh limiting groove 403 have been respectively disposed at two ends of the second fixing member 401, the sixth limiting groove 402 and the seventh limiting groove 403 respectively fix the optical processing unit 404 and the optical scribing unit 405 in the light path channel, an eighth limiting groove 406 has been disposed between two ends of the second fixing member 401, and the eighth limiting groove 406 fixes the light beam adjusting unit in the light path channel.
Through the mode, the optical processing unit, the optical scribing unit and the light beam adjusting unit are fixed in the light path channel, the assembling structure is reduced, the assembling efficiency is improved, and the line forming quality is improved.
In some embodiments, the second fixing member further comprises a limiting structure capable of preventing the optical processing unit from rotating along the axial direction of the fixing member; and/or
The second fixing piece also comprises a limiting structure which can prevent the light beam adjusting unit from rotating along the axial direction of the fixing piece; and/or
The second fixing piece also comprises a limiting structure capable of preventing the optical scribing unit from rotating along the axial direction of the fixing piece.
In some embodiments, the laser further comprises a sliding pair, the sliding pair comprises a first sliding component and a second sliding component which can move relatively along a straight line where the light path is located, the first sliding component is connected with the second fixing piece, and the second sliding component is connected with the point light source generating unit.
Through the mode, the distance between the optical processing unit of the second fixing piece and the light source generating unit is adjusted through the first sliding assembly and the second sliding assembly, and the adjustment of the focal length of the optical processing unit is achieved.
In some of these embodiments, the flat holes include kidney-shaped holes and rectangular holes.
In this embodiment, the depth of field is increased by reducing the amount of light incident on the optical scribing unit through the flat hole, and compared with the common circular beam adjusting unit in the camera, the flat hole structure proposed in the present application can allow more second laser beams to be incident on the optical scribing unit while increasing the depth of field, for example, the flat hole structure proposed in the present application is a rectangle, the length of the rectangle is the long axis of the flat hole, the width of the rectangle is the short axis length, assuming that the width of the rectangle is 0.5 cm and the length is 1 cm, and the diameter of the circular beam adjusting unit with the same depth of field range is 0.5, the area of the beam incident on the optical scribing unit through the beam adjusting unit with the circular through hole is 0.19625 square cm, the area of the beam incident on the optical scribing unit through the beam adjusting unit with the rectangular through hole is 0.5 square cm, and 0.5 square cm is far greater than 0.19625 square cm, it is indicated that the beam steering unit having the rectangular through hole can not only increase the depth of field, but also allow more second laser beams to be incident on the optical scribing unit, compared to the beam steering unit having the circular through hole.
In some of these embodiments, the optical scribing unit comprises a powell prism.
It should be noted that the powell prism is an optical line prism, which can optimally scribe a straight line with uniform optical density, good stability and good linearity after the laser beam passes through.
In some of these embodiments, the beam adjustment unit comprises a diaphragm.
The application also provides a three-dimensional laser scanner comprising the laser of any of the above embodiments.
Fig. 5 is a cross-sectional view of a laser structure according to an embodiment of the present invention, as shown in fig. 5, the laser includes: the diode 501, the lens 502, the diaphragm 503, the powell prism 504, the first fixing member 505 and the third fixing member 506 are arranged, a kidney-shaped hole 507 is formed in the diaphragm 503, a light path channel is formed between the diode 501 and the powell prism 504, the first fixing member 505 and the diaphragm 503 are integrally formed, a first limiting groove 508 and a second limiting groove 509 are respectively formed in two ends of the first fixing member 505, the lens 502 and the powell prism 504 are respectively fixed in the light path channel by the first limiting groove 508 and the second limiting groove 509, a ninth limiting groove 510 is formed in the third fixing member 506, the diode 501 is fixed in the light path channel by the ninth limiting groove 510, a gap is reserved between the first fixing member 505 and the third fixing member 506, and the first fixing member 505 and the third fixing member 506 can slide relatively.
Through the mode, the diaphragm and the first fixing piece are integrally formed, the assembling structure is reduced, the assembling efficiency is improved, meanwhile, the light transmission amount of incident Bowell prisms is reduced through the waist-shaped hole structure in the diaphragm, the depth of field of the laser is improved, and the line forming quality is improved.
It should be understood by those skilled in the art that various features of the above embodiments can be combined arbitrarily, and for the sake of brevity, all possible combinations of the features in the above embodiments are not described, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.
The above examples are merely illustrative of several embodiments of the present application, and the description is more specific and detailed, but not to be construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (13)
1. A laser, comprising: a laser beam generating unit, a beam adjusting unit and an optical scribing unit; the beam adjusting unit is arranged between the laser beam generating unit and the optical scribing unit; the laser beam generating unit is used for generating a first laser beam; the beam adjusting unit comprises a flat hole, the flat hole is used for limiting the light flux of a second laser beam incident to the optical scribing unit from the first laser beam, and the optical scribing unit is used for expanding the second laser beam into a projectable linear laser line.
2. The laser of claim 1, wherein the flat hole has a major axis and a minor axis perpendicular to each other, the major axis being oriented parallel to a laser plane corresponding to the line laser line.
3. The laser of claim 1, wherein the laser beam generation unit comprises a point light source generation unit and an optical processing unit, and the optical processing unit is configured to process the light beam emitted from the point light source generation unit into the first laser beam.
4. The laser of claim 3, wherein the point light source generating unit includes a laser diode; the optical processing unit comprises a lens having an optical focusing effect.
5. The laser of claim 3, further comprising a first fixing member, wherein the beam adjusting unit is integrally formed with the first fixing member, and the first fixing member is configured to fix the optical processing unit and the optical scribing unit and maintain a separation distance between the optical processing unit and the optical scribing unit.
6. The laser device according to claim 5, wherein the first fixing member is a cylinder, an optical path channel is formed inside the cylinder, a first limiting groove and a second limiting groove are respectively formed at two ends of the first fixing member, and the first limiting groove and the second limiting groove respectively fix the optical processing unit and the optical scribing unit in the optical path channel.
7. The laser of claim 3, further comprising a second fixing member for fixing the optical processing unit, the beam adjusting unit and the optical scribing unit and maintaining a spaced distance between the optical processing unit and the optical scribing unit.
8. The laser of claim 7, wherein the second fixing member comprises a first fixing component and a second fixing component, the first fixing component and the second fixing component cooperate with each other to form a light path channel, an inner wall of the first fixing component and an inner wall of the second fixing component are circumferentially provided with a third limiting groove, a fourth limiting groove and a fifth limiting groove, and the third limiting groove, the fourth limiting groove and the fifth limiting groove respectively fix the optical processing unit, the beam adjusting unit and the optical scribing unit in the light path channel.
9. The laser of claim 8, further comprising: the shielding piece is used for reducing the length of the short shaft of the flat hole.
10. The laser of claim 7,
the second fixing piece also comprises a limiting structure capable of preventing the optical processing unit from rotating along the axial direction of the fixing piece; and/or
The second fixing piece also comprises a limiting structure capable of preventing the light beam adjusting unit from rotating along the axial direction of the fixing piece; and/or
The second fixing piece further comprises a limiting structure capable of preventing the optical scribing unit from rotating along the axial direction of the fixing piece.
11. The laser of claim 1, wherein the flat holes comprise a kidney-shaped hole and a rectangular hole.
12. The laser of claim 1, wherein the beam modification unit comprises a diaphragm.
13. A three-dimensional laser scanner, characterized in that it comprises a laser according to any of claims 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120423393.2U CN214379241U (en) | 2021-02-26 | 2021-02-26 | Laser device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120423393.2U CN214379241U (en) | 2021-02-26 | 2021-02-26 | Laser device |
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| Publication Number | Publication Date |
|---|---|
| CN214379241U true CN214379241U (en) | 2021-10-08 |
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| CN202120423393.2U Active CN214379241U (en) | 2021-02-26 | 2021-02-26 | Laser device |
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- 2021-02-26 CN CN202120423393.2U patent/CN214379241U/en active Active
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Address after: Room 102, Unit 1, Building 12, No. 998, Wenyi West Road, Wuchang Street, Yuhang District, Hangzhou City, Zhejiang Province, 311121 Patentee after: Sikan Technology (Hangzhou) Co.,Ltd. Address before: Room 101, building 12, No. 998, Wenyi West Road, Wuchang Street, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU SCANTECH Co. |