CN111190282A - Large-view-field transmission type high-energy laser emission system - Google Patents
Large-view-field transmission type high-energy laser emission system Download PDFInfo
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- CN111190282A CN111190282A CN201911395824.2A CN201911395824A CN111190282A CN 111190282 A CN111190282 A CN 111190282A CN 201911395824 A CN201911395824 A CN 201911395824A CN 111190282 A CN111190282 A CN 111190282A
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- laser emission
- energy laser
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/105—Scanning systems with one or more pivoting mirrors or galvano-mirrors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver
- G01V8/14—Detecting, e.g. by using light barriers using one transmitter and one receiver using reflectors
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
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Abstract
In order to overcome the defects that a transmission type system in the prior art has a small view field, is not beneficial to detecting and searching a target and increases the caliber of the system, the invention provides a transmission type high-energy laser emission system with a large view field, which comprises: the system comprises a common-caliber telescope system, a swing mirror, a beam combiner and a receiving lens; the laser is transmitted through the common-caliber telescopic system after the transmission action of the beam combining mirror and the reflection action of the swing mirror; the visible light is received by the receiving lens through the reflection action of the swing mirror and the beam combining mirror after passing through the common-caliber telescopic system. The invention is suitable for the miniaturization design of the high-energy laser emission system.
Description
Technical Field
The invention relates to the field of high-energy laser emission systems, in particular to a large-view-field transmission type high-energy laser emission system.
Background
Along with the continuous improvement of semiconductor laser output power, the development wave of high energy laser emission equipment has been driven, and this equipment has that working distance is far away, and output energy is high, follows the characteristics of aiming and launching the common light path, can realize that the position of following the aiming is unanimous with the laser far field position of assembling, and the system realizes the focus that lasts of laser at the target assigned position through the stable tracking to the target. The existing high-power laser emission system is divided into a reflection type and a refraction type, and the scanning field of view cannot be enlarged due to the influence of off-axis aberration of the reflection type system; the traditional transmission system can increase the light-passing aperture of the system due to laser scanning, and a high-energy laser system can not shield light beams like a traditional optical system, and is limited by the processing aperture of a transmission lens, the scanning field of view can not be enlarged, the traditional system is a small field of view system, the instantaneous field of view and the scanning field of view are both within 10', the detection and the search of targets are not facilitated, the precision requirement on a system turntable is overhigh, the overall cost of the system is increased, and high-energy laser beams move at the emission port of the system in the laser scanning process, the aperture of the system is increased, and the miniaturization and the light weight of equipment are not facilitated.
Disclosure of Invention
The invention aims to overcome the defects that a transmission type system in the prior art is small in view field, is not beneficial to detection and search of a target and increases the caliber of the system.
The invention provides a large-view-field transmission type high-energy laser emission system, which comprises: the system comprises a common-caliber telescope system, a swing mirror, a beam combiner and a receiving lens; the laser is transmitted through the common-caliber telescopic system after the transmission action of the beam combining mirror and the reflection action of the swing mirror; the visible light is received by the receiving lens through the reflection action of the swing mirror and the beam combining mirror after passing through the common-caliber telescopic system.
Preferably, the exit pupil position is located at the first optical surface position of the common aperture telescopic system.
Preferably, the entrance pupil position is located at the oscillating mirror.
Preferably, the common-aperture telescopic system is designed for secondary imaging, and the focus of the common-aperture telescopic system is converged in a quartz structure.
Preferably, the common aperture telescopic system comprises a negative lens group and a positive lens group along the laser emission direction.
Preferably, the oscillating mirror realizes the scanning functions of emitting laser and detecting a view field through two-dimensional oscillation.
Preferably, the beam combiner has a coating film, which can transmit the laser light through the beam combiner and can reflect the visible light on the surface of the beam combiner.
Preferably, the wavelength band of the laser is 1080 +/-5 nm.
Preferably, the wavelength band of visible light is 480nm to 650 nm.
Preferably, the system further comprises a folding mirror for reflecting the laser beam to fold the optical path.
The invention has the beneficial effects that:
1. the scanning field of view of the system is increased, the detection and search difficulty of the system is reduced, the precision requirement of the system on the rotary table is lowered, the system cost is lowered, and the laser spots are not changed at the outlet position of the system in the scanning process of the system.
2. The system adopts a common laser transmitting and receiving light path design, can simultaneously realize the functions of detecting a long-distance target and transmitting high-energy laser, has a detection view field of 1.5 degrees and a scanning view field of 1.5 degrees, and is far larger than the view field within 10' in the prior art.
3. The system realizes pupil coupling through secondary imaging, the entrance pupil is designed at the position of the swing mirror, the exit pupil is coupled to the first position of the system lens group, the laser facula is unchanged at the position of the system exit in the process of swing mirror scanning, and the aperture utilization rate of the system is effectively increased. In one embodiment, the aperture of the system is 90mm, the aperture of the light-emitting device is 75mm, the aperture utilization rate reaches 83%, the aperture of the system is reduced, and the overall miniaturization and light weight of the device are realized.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic structural diagram of a large field of view transmission type high-energy laser emission system according to the present invention;
FIG. 2 is a block diagram of one embodiment of the present invention;
FIG. 3 is a graph of aberration in the visible wavelength band according to an embodiment of the present invention;
FIG. 4 is an aberration curve for the laser band of one embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The invention provides a large-view-field transmission type high-energy laser emission system, as shown in figure 1, comprising:
a common-caliber telescopic system 10, a swing mirror 20, a beam combiner 30 and a receiving lens 40; after the laser passes through the transmission action of the beam combining mirror 30 and the reflection action of the swing mirror 20, the laser is emitted through the common-caliber telescopic system 10; the visible light passes through the common-aperture telescope system 10 and is then received by the receiving lens 40 through the reflection action of the oscillating mirror 20 and the beam combiner 30.
The system exit pupil position is located at the first optical surface position of the common-aperture telescopic system 10, the entrance pupil position is located at the tilting mirror 20, and the common-aperture telescopic system 10 is designed for secondary imaging. The first optical surface is the closest optical element to the outside world in the lens system. The oscillating mirror 20 realizes the scanning functions of emitting laser and detecting a view field through two-dimensional oscillation. By the arrangement, the laser facula does not generate position change on the surface in the scanning process of the oscillating mirror 20, and the physical caliber of the system is reduced. The real focus of the common-caliber telescopic system 10 is converged in the quartz structure 15, so that the arrangement can ensure that the real focus position of the high-energy laser does not have breakdown and ionization phenomena.
The common-aperture telescope system comprises a negative lens group and a positive lens group along the laser emission direction, in the embodiment shown in fig. 2, the positive lens group consists of 4 lenses, the telescope negative group consists of 7 lenses, the focal length ratio of the front group to the rear group is 3:1, and the beam expansion power of the telescope group is 3 times.
The beam combiner 30 has a coating film, and can transmit laser light through the beam combiner 30 and reflect visible light on the surface of the beam combiner 30. In one embodiment, the common-aperture telescope system 10 is a common-path transmission system for 1080 ± 5nm band laser and 480nm to 650nm visible light band, and the beam combiner 30 realizes a dual-band coupling function through coating, wherein the 1080 ± 5nm band is transmitted through the beam combiner, and the 480nm to 650nm band visible light is reflected on the front surface of the beam combiner.
The system can also include a turning mirror 50, which reflects the laser beam to turn the light path and reduce the volume of the system.
The receiving lens 40 realizes visible light imaging and provides image information for system detection and tracking.
< example >
FIG. 2 illustrates one embodiment of a large field of view transmissive high energy laser emission system. In the figure 2, a common-aperture telescope system is designed for secondary imaging, real focuses are converged in a high-purity quartz rod, so that the real focus position of high-energy laser is guaranteed against breakdown and ionization, a positive group of lenses consists of 4 lenses, a telescope negative group consists of 7 lenses, the focal length ratio of the front group to the rear group is 3:1, the beam expansion magnification of the telescope group is 3 times, an entrance pupil of the system is located at a position of a swing mirror, an exit pupil of the system is located on a first surface of the system, and therefore laser spots are not subjected to position transformation on the surface in the process of swing mirror scanning, and the physical aperture of the system is reduced; the receiving lens group consists of 11 transmission lenses, the accurate tracking instantaneous field of view of the system is 1.5 degrees, the scanning field of view is +/-0.75 degrees, and the field of view is increased by more than 10 times compared with the traditional high-energy laser emission field of view, so that the detection capability of the system is effectively improved, and the precision requirement of the system on a turntable is reduced.
Fig. 3 and 4 show the visible light aberration graphs of the embodiment, and it can be seen from the graphs that the transfer function of the visible light detection channel is higher than 0.3 at 45 line pairs, and the transfer function of the laser channel is close to the diffraction limit.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A large field of view transmissive high energy laser emission system comprising:
the system comprises a common-caliber telescopic system (10), a swing mirror (20), a beam combiner (30) and a receiving lens (40); the laser is transmitted through the common-caliber telescopic system (10) after the transmission action of the beam combining mirror (30) and the reflection action of the swing mirror (20); visible light passes through the common-caliber telescopic system (10) and is received by the receiving lens (40) through the reflection action of the oscillating mirror (20) and the beam combining mirror (30).
2. The large field of view transmissive high energy laser emission system of claim 1, wherein the exit pupil location is at the first optical surface location of the common aperture telescopic system (10).
3. The large field of view transmissive high energy laser emission system according to claim 1 or 2, wherein the entrance pupil position is located at the oscillating mirror (20).
4. The large field of view transmissive high energy laser emission system according to claim 1, wherein the common aperture telescopic system (10) is designed for secondary imaging, with its real focus converging in a quartz structure (15).
5. The large field of view transmissive high energy laser emission system according to claim 1, wherein said common aperture telescopic system (10) comprises a negative lens group and a positive lens group along the laser emission direction.
6. The large-field transmission type high-energy laser emission system according to claim 1, wherein the oscillating mirror (20) realizes the scanning functions of emitting laser and detecting field of view by two-dimensional oscillation.
7. The large-field-of-view transmissive high-energy laser emission system according to claim 1, wherein the beam combiner (30) has a coating to allow the laser light to transmit through the beam combiner (30) and to reflect the visible light on the surface of the beam combiner (30).
8. The large field of view transmissive high energy laser emission system of claim 1, wherein said laser has a wavelength band of 1080 ± 5 nm.
9. The large field of view transmissive high energy laser emission system of claim 1, wherein said visible light has a wavelength band of 480nm to 650 nm.
10. The large field of view transmissive high energy laser emission system of claim 1, further comprising a turning mirror (50) for reflecting the laser beam to effect a turning of the optical path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395824.2A CN111190282A (en) | 2019-12-30 | 2019-12-30 | Large-view-field transmission type high-energy laser emission system |
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| CN201911395824.2A CN111190282A (en) | 2019-12-30 | 2019-12-30 | Large-view-field transmission type high-energy laser emission system |
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| CN111190282A true CN111190282A (en) | 2020-05-22 |
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| CN201911395824.2A Pending CN111190282A (en) | 2019-12-30 | 2019-12-30 | Large-view-field transmission type high-energy laser emission system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113759542A (en) * | 2021-08-24 | 2021-12-07 | 长春理工大学 | Tracking and capturing optical system of unmanned aerial vehicle laser communication device |
| CN113783626A (en) * | 2021-08-24 | 2021-12-10 | 长春理工大学 | Communication receiving optical system of unmanned aerial vehicle laser communication device |
-
2019
- 2019-12-30 CN CN201911395824.2A patent/CN111190282A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113759542A (en) * | 2021-08-24 | 2021-12-07 | 长春理工大学 | Tracking and capturing optical system of unmanned aerial vehicle laser communication device |
| CN113783626A (en) * | 2021-08-24 | 2021-12-10 | 长春理工大学 | Communication receiving optical system of unmanned aerial vehicle laser communication device |
| CN113759542B (en) * | 2021-08-24 | 2022-08-26 | 长春理工大学 | Tracking and capturing optical system of unmanned aerial vehicle laser communication device |
| CN113783626B (en) * | 2021-08-24 | 2023-02-03 | 长春理工大学 | Communication receiving optical system of unmanned aerial vehicle laser communication device |
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