CN106813652A - Laser beam emitting device and its optical module - Google Patents
Laser beam emitting device and its optical module Download PDFInfo
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- CN106813652A CN106813652A CN201610679430.XA CN201610679430A CN106813652A CN 106813652 A CN106813652 A CN 106813652A CN 201610679430 A CN201610679430 A CN 201610679430A CN 106813652 A CN106813652 A CN 106813652A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 43
- 239000000758 substrate Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/002—Active optical surveying means
- G01C15/004—Reference lines, planes or sectors
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Semiconductor Lasers (AREA)
Abstract
The invention discloses a kind of laser beam emitting device and its optical module, wherein optical module includes：First emitting element and the second radiated element, can be along second exit surface in the direction shoot laser face parallel to the second plane with one；Ray Of Light for laser head to be launched is divided into the light-dividing device for being incident upon first emitting element and the second radiated element respectively；Wherein, the second radiated element, light-dividing device and laser head are along arranged in a straight line；First emitting element sets the side of the straight line；Light-dividing device has：Incident light can be made to be divided into the light splitting interface of the orthogonal emergent ray of two beams；Planar tilt where the lasing area that plane where light splitting interface is launched with first emitting element or the second radiated element intersects.Laser beam emitting device of the invention can launch multiple lasing areas by a laser head and relevant optical components.
Description
Technical Field
The invention relates to a laser emitting device and an optical assembly thereof.
Background
In order to project a plurality of light rays on a plurality of different planes, a plurality of laser emitters are generally installed to project the plurality of different planes toward different angles. For the laser projector mentioned in US6,931,739, four laser modules are installed in combination in pairs to realize the projection of two fan-shaped planes, and the two orthogonal fan-shaped planes are formed by the respective projections. However, such a laser emitting device is large in size, complicated in manufacturing process, and high in cost.
Disclosure of Invention
To overcome the disadvantages of the prior art, the present invention provides an optical assembly for a laser emitting device capable of emitting two different projection lights through one laser emitter.
An optical assembly suitable for use in a laser head comprising: a first emitting element having a first exit surface capable of exiting the laser plane in a direction parallel to the first plane; a second emitting element having a second exit surface capable of exiting the laser plane in a direction parallel to the second plane; the light splitting device is used for splitting a beam of light emitted by the laser head into a first emitting element and a second emitting element which are respectively emitted into; the second emission element, the light splitting device and the laser head are arranged along a straight line; the first emitting element is arranged on one side of the straight line; the light splitting device includes: the light splitting interface can enable incident light to be split into two beams of emergent light which are vertical to each other; the plane of the light splitting interface is obliquely intersected with the plane of the laser plane emitted by the first emitting element or the second emitting element.
Further, the light splitting device includes: the low-beam polyhedron at least comprises an incident plane vertical to the emergent ray of the laser head; the high beam source polyhedron has at least one outgoing plane perpendicular to the outgoing ray of laser head. The low-beam polyhedron has: a low beam mid-plane for receiving light incident from the plane of incidence; the high-beam source polyhedron includes: and the high beam middle plane is used for emitting the light to the emergent plane. Wherein the low beam mid-plane is parallel to the high beam mid-plane and they fit together to form a light splitting interface.
Further, the low-beam source polyhedron further has: a low beam exit plane for exiting the light obtained from the light splitting interface to the first emitting element; the low-beam exit plane is perpendicular to the entrance plane.
Furthermore, the low beam reflecting surface is used for reflecting the light rays reflected back to the low beam source polyhedron from the light splitting interface to the low beam emergent plane; the low-beam reflecting surface is positioned on one side of the low-beam polyhedron far away from the first emitting element.
Further, the low beam reflecting surface obliquely intersects with the low beam incident plane, and the plane on which the low beam reflecting surface is located obliquely intersects with the plane on which the light splitting interface is located.
An optical assembly suitable for use in a laser head, the optical assembly comprising a light-splitting element, the light-splitting element comprising: a light-transmissive substrate through which light can pass; the light splitting film can enable part of light rays to pass through and enable the other part of light rays to be reflected; the light splitting film is covered on the surface of the light-transmitting base body, and the light splitting interface is formed on the interface of the light splitting film and the light-transmitting base body.
Further, the light splitting interface of the optical element is at 45 ° to the plane of the laser plane emitted by the second emitting element.
Further, the laser planes emitted by the first and second emitting elements cover at least 180 °.
Furthermore, the light emitted to the first emitting element or the second emitting element by the light splitting device and the laser surface emitted by the light after passing through the first emitting element or the second emitting element are positioned on two sides of the first emitting element or the second emitting element.
The present invention also provides a laser transmitter, comprising: laser head and above-mentioned optical assembly.
The laser head has the advantage that two laser planes for indication can be projected by adopting one laser head and the corresponding optical assembly.
Drawings
FIG. 1 is a schematic structural diagram of a laser emitting device according to the present invention;
FIG. 2 is a schematic structural view of a laser module of the laser transmitter apparatus shown in FIG. 1;
FIG. 3 is a plan view of a laser head and optical assembly of a first embodiment of the present invention;
FIG. 4 is a plan view of a light splitting device of the optical assembly shown in FIG. 3;
FIG. 5 is a plan view of a laser head and optical assembly of a second embodiment of the present invention;
fig. 6 is a structural view of a light splitting element of the optical module shown in fig. 5.
The drawings are only for purposes of illustrating selected embodiments and are not to be construed as limiting the scope of the invention in all possible ways.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
As shown in fig. 1, the laser transmitter 100 includes a housing 101 and at least one laser module 102. The laser module 102 is at least partially accommodated in the housing 101, and the laser module 102 can be installed inside the housing 101 of the laser emitting device 100 in a fixed manner without relative movement with the housing; or may be mounted on a horizontal device inside the housing 101 of the laser emitting device 100, following a weight or other form of weight to swing relative to the housing 101. Typically, the housing 101 is made of plastic injection molding or metal die casting, but other materials are not excluded. The laser emitting device 100 further includes a base, a power supply, a bracket, and the like.
The laser emitting device may preferably be a laser line projector, in particular a self-balancing laser line projector, a laser level, a tile line projector or other line projection equipment with distance measuring and/or positioning functions.
Fig. 2 is a basic structure of a laser module 102, and the laser module 102 mainly includes an optical assembly 10 and a laser head 20. The optical module 10 is adapted to the laser head 20, and the optical module 10 is typically adapted and processed to match the state of the laser head 20, for example by being glued, glued or otherwise fixed to the laser head 20, but removable adaptation to the laser head 20 is not excluded. The laser head 20 may be a low frequency red diode at a lower cost, but high frequency red and green diodes at a higher cost are not excluded. The laser beam emitted from the laser head 20 is shaped by the collimator lens and then propagates in a straight line. Generally, a collimating lens is installed in the laser head 20. The optical assembly 10 is used to spatially disperse the shaped light emitted by the laser head 20 into laser facets 103 and 104 having two angular boundaries. It will be appreciated that if the angular boundary of the angled plane extends to infinity, the pattern enclosed by the angular boundary of the light formed by the laser light after passing through the optical assembly 10 and the boundary at infinity will be referred to as the laser plane. Thus, any laser plane is projected on a working plane to form a projection straight line, and the aim of line projection is fulfilled. Of course, because the optical assembly 10 of the present invention can split two light angle planes, when the laser light passes through the optical assembly 10 and is projected onto a plurality of working planes, a projection straight line can be formed on at least two planes respectively.
Referring to fig. 3, the optical assembly 10 includes a first emitting element 11, a first emitting element 12, and a light splitting device 13, where the light splitting device 13 has a light splitting interface, and the plane of the light splitting interface is 105. A shaped collimated beam L emitted by the laser head 201The collimated light L1The light beam is synchronously split into two beams of light rays which are perpendicular to each other through the light splitting interface of the light splitting device 13 and then emitted, and one beam of light is emitted from the emitting surface 111 of the first emitting element 11 to form a laser plane 103; the other light exits the exit surface 121 of the first emitting element 12 forming the laser facet 104.
The plane of the laser plane 103 is a first plane, the plane of the laser plane 104 is a second plane, and specifically, the first plane and the second plane intersect perpendicularly, and more specifically, the laser plane 103 and the laser plane 104 have two intersecting portions at the upper portion and the lower portion of the housing 101. The plane 105 of the beam-splitting interface of the beam-splitting means 13 intersects the plane of the laser plane 103 emitted by the first emission element 11 or the plane of the laser plane 104 emitted by the first emission element 12 obliquely in space.
Referring to fig. 2 and 3, the laser plane 103 has an opening angle α; the opening angle of the laser plane 104 is beta. Generally, α and β are opening angles greater than 0 °, and further, at least one of the opening angles is greater than 180 °, and more specifically, both α and β are opening angles greater than 180 °. Also, the average energy of the laser plane 103 and the laser plane 104 emitted by the laser module 102 is substantially the same.
The laser head 20, the light splitting means 13 and the first emitting element 12 are spatially arranged substantially in line. The first emitting element 11 is beside the straight line formed by the three elements.
The first emitting element 11 and the first emitting element 12 may be general optical lenses or optical mirrors, specifically, full-circle/semi-cylinder lenses, especially full-circle/semi-cylinder lenses with a high refractive index, or non-circular lenses with other shapes capable of emitting laser planes, or other optical elements with reflecting surfaces, especially optical elements with an angle of light emission greater than 180 °. The light emitted from the light splitter 13 to the first emitting element 11 is L2, L2A laser plane 103 which is a light ray emitted after passing through the first emitting element 11; the light beam emitted from the light splitting device 13 to the second emitting element 12 is L3，L3The light emitted after passing through the second emitting element 12 is the laser plane 104. In particular, at least L2And the laser planes 103 are located on both sides and/or L of the first emitting element 113And laser facets 104 are located on either side of the second emitting element 12. At least one of the exit surface 111 and the exit surface 121 is a light-transmissive exit surface, and particularly, the light-transmissive exit surface is a curved surface, but not limited to a curved surface.
As can be seen from fig. 4, the light-splitting means 13 has a low-beam polyhedron 131 and a high-beam polyhedron 132. Thus, those skilled in the art will appreciate that the low-beam polygon 131 is one optical element that is closer to the light source, i.e., laser head 20, and the high-beam polygon 132 is another optical element that is farther from the light source than the low-beam polygon 131. Specifically, the low-beam polygon 131 and the high-beam polygon 132 have at least 2 faces.
The low-beam polyhedron 131 has at least one incidence plane 131a, and the low-beam polyhedron 131 also has a low-beam middle plane 131b for receiving light incident from the incidence plane 131 a. There is also a low-beam exit plane 131c for exiting a beam of light obtained from the light splitting interface to the first emission element 11. And also has a low beam reflecting surface 131d for reflectingA light ray emitted from the light splitting interface is reflected back to the light source polyhedron to the near light emergent plane 131 c. As can be seen from FIGS. 3 and 4, the plane of the incident plane 131a and the outgoing light L of the laser head 201The plane is vertical; the low-beam exit plane 131c is perpendicular to the entrance plane 131 a; the low beam reflecting surface 131d is located on a side of the low beam polyhedron 131 away from the first emitting element 11. Outgoing ray L of laser head 201In a plane substantially parallel to, or coincident with, the laser plane 104. Specifically, the outgoing light L of the laser head 201The plane of the low beam reflecting surface 131d is obliquely intersected with the plane of the low beam reflecting surface in the space. The low beam reflection surface 131d obliquely intersects the low beam incidence plane 131a, and the plane on which the low beam reflection surface 131d is located obliquely intersects the plane 105 on which the light splitting interface is located.
The far-light source polyhedron 132 has at least one far-light exit plane 132a and a far-light intermediate plane 132 b. Wherein the high beam intermediate plane 132b emits a bundle of light rays obtained from the light splitting interface to the high beam exit plane 132a, and further, the light rays exit to the first emission element 12 through the high beam exit plane 132 a. The plane of the high beam exit plane 132a is perpendicular to the plane of the exit beam L1 of the laser head 20.
Thus, as shown in fig. 4, the low beam intermediate plane 131b is parallel to the high beam intermediate plane 132b, and they fit together to form the light-splitting interface.
Specifically, the refractive indices of the high-beam source polygon 132 and the high-beam source polygon 132 are different. The shape of the low-beam source polyhedron 131 may be a pentaprism, and the shape of the high-beam source polyhedron 132 may be a wedge lens, without excluding other shapes that can implement the present solution. Both have a low beam intermediate plane 131b and a high beam intermediate plane 132b that may be closely conformed. Those skilled in the art will also appreciate that the low-beam source polyhedron 131 and the high-beam source polyhedron 132 may also be machined as a single piece. In general, specifically, at least the first emitting element 11 is closely attached to the low beam exit plane 131c of the light splitting device 13, or the first emitting element 12 is closely attached to the high beam exit plane 132a of the light splitting device 13. Specifically, the first emitting element 11, the first emitting element 12 and the light splitting device 13 are integrally processed, and other fixing forms capable of realizing the scheme are not excluded.
The present invention also proposes another alternative form as shown in fig. 5, and the other structure is substantially the same as that in the first embodiment except for the difference between the light splitting element 13' and the light splitting device 13, and only the difference between the first embodiment and the second embodiment will be described below.
The optical assembly 10 'includes a first emitting element 11', a first emitting element 12 ', and a light splitting element 13', where the light splitting element 13 'has a light splitting interface, and the plane of the light splitting interface is 105'. A collimated beam of light L 'emitted by laser head 20'1L 'of the collimated light'1The beam splitting interface of the beam splitting element 13 'is synchronously split into two mutually perpendicular light beams L'2And L'3And (4) injecting. The light-splitting element 13' has a light-transmissive substrate 14 through which light can pass.
With further reference to fig. 6, the light-transmissive substrate 14 has at least one exit plane 14a for emitting the laser beam outward. The exit plane 14a is attached with a spectroscopic film 15, and the spectroscopic film 15 and the exit plane 14a of the light-transmitting substrate 14 form a spectroscopic interface. The light splitting film 15 has the characteristic of allowing light to penetrate and reflect, and can allow a part of light to penetrate through the light splitting interface and be emitted to the first emitting element 12 ', and simultaneously allow another part of light to be reflected to the first emitting element 11' through the light splitting interface. Further, the light splitting element 13 ' also has a frame (not shown) for supporting the light-transmissive substrate 14 and the first and second emission elements 11 ', 12 '. It will be appreciated by those skilled in the art that the frame ensures a fixed positional relationship between the three, and the frame may be made of, but not limited to, plastic, metal, etc.
In particular, the plane 105 'in which the light-splitting interface is located makes an angle of 45 ° with the plane of the laser plane 104 emitted by the first emitting element 12'. Moreover, the light emitted to the first emitting element 12' through the light splitting interface is parallel to or coincident with the original propagation direction of the light.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by means of equivalent substitution or equivalent transformation fall within the protection scope of the present invention.
Claims (10)
1. An optical assembly adapted for use in a laser head, comprising:
a first emitting element having a first exit surface capable of exiting the laser plane in a direction parallel to the first plane;
a second emitting element having a second exit surface capable of exiting the laser plane in a direction parallel to the second plane;
the light splitting device is used for splitting a beam of light emitted by the laser head so as to respectively irradiate the light into the first emitting element and the second emitting element;
wherein,
the second emission element, the light splitting device and the laser head are arranged along a straight line; the first emitting element is arranged on one side of the straight line;
the light splitting device includes:
the light splitting interface can enable incident light to be split into two beams of emergent light which are vertical to each other;
the plane where the light splitting interface is located is obliquely intersected with the plane where the laser plane emitted by the first emitting element or the second emitting element is located.
2. An optical assembly according to claim 1, comprising a light splitting device comprising:
the low-beam polyhedron at least comprises an incident plane vertical to the emergent ray of the laser head;
the high beam source polyhedron is at least provided with an emergent plane vertical to the emergent ray of the laser head;
the low-beam polyhedron has:
a low beam mid-plane for receiving light incident from the plane of incidence;
the high-beam source polyhedron has:
a high beam intermediate plane for emitting light to the exit plane;
the low beam mid-plane is parallel to the high beam mid-plane and they fit together to form the light splitting interface.
3. The optical assembly of claim 2,
the low-beam polyhedron further has:
a low-beam exit plane for exiting the light obtained from the light splitting interface to the first emission element;
the low-beam exit plane is perpendicular to the incident plane.
4. The optical assembly of claim 3,
the low-beam polyhedron further has:
the low beam reflecting surface is used for reflecting the light rays reflected back to the low beam source polyhedron from the light splitting interface to the low beam emitting surface;
the low-beam reflecting surface is positioned on one side of the low-beam polyhedron far away from the first emitting element.
5. The optical assembly of claim 4,
the low-beam reflecting surface is obliquely intersected with the incident plane, and the plane where the low-beam reflecting surface is located is obliquely intersected with the plane where the light splitting interface is located.
6. The optical assembly of claim 1,
further comprising a light splitting element, the light splitting element comprising:
a light-transmissive substrate through which light can pass;
the light splitting film can enable part of light rays to pass through and enable the other part of light rays to be reflected;
the light splitting film is covered on the surface of the light-transmitting base body, and the light splitting interface is formed on the interface of the light splitting film and the light-transmitting base body.
7. The optical assembly of claim 6,
the light splitting interface of the optical element is 45 degrees to the plane of the laser plane emitted by the second emitting element.
8. The optical assembly of claim 1, wherein:
the laser planes emitted by the first and second emitting elements cover at least 180 °.
9. The optical assembly of claim 1, wherein:
the light beam emitted to the first emitting element or the second emitting element by the light splitting device and the laser surface emitted by the light beam after passing through the first emitting element or the second emitting element are positioned on two sides of the first emitting element or the second emitting element.
10. A laser emitting device comprising: a laser head and an optical assembly according to any one of claims 1 to 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510854077X | 2015-11-30 | ||
| CN201510854077 | 2015-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106813652A true CN106813652A (en) | 2017-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610679430.XA Pending CN106813652A (en) | 2015-11-30 | 2016-08-16 | Laser beam emitting device and its optical module |
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| Country | Link |
|---|---|
| CN (1) | CN106813652A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08320229A (en) * | 1995-05-25 | 1996-12-03 | Topcon Corp | Laser surveying equipment |
| JP2003177020A (en) * | 2001-12-11 | 2003-06-27 | Audio Technica Corp | Laser marker |
| CN1479079A (en) * | 2003-07-22 | 2004-03-03 | 浦建华 | Device for producing two mutually vertical laser light plane surface |
| CN1743807A (en) * | 2004-09-03 | 2006-03-08 | 株式会社拓普康 | Rotary laser apparatus |
| CN2876710Y (en) * | 2006-03-01 | 2007-03-07 | 方础光电科技股份有限公司 | Multi-face laser level-meter |
-
2016
- 2016-08-16 CN CN201610679430.XA patent/CN106813652A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08320229A (en) * | 1995-05-25 | 1996-12-03 | Topcon Corp | Laser surveying equipment |
| JP2003177020A (en) * | 2001-12-11 | 2003-06-27 | Audio Technica Corp | Laser marker |
| CN1479079A (en) * | 2003-07-22 | 2004-03-03 | 浦建华 | Device for producing two mutually vertical laser light plane surface |
| CN1743807A (en) * | 2004-09-03 | 2006-03-08 | 株式会社拓普康 | Rotary laser apparatus |
| CN2876710Y (en) * | 2006-03-01 | 2007-03-07 | 方础光电科技股份有限公司 | Multi-face laser level-meter |
Non-Patent Citations (1)
| Title |
|---|
| 覃辉: "《土木工程测量》", 30 June 2006, 同济大学出版社 * |
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Application publication date: 20170609 |
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