CN101738715B - Optical collector with high focal ratio - Google Patents
Optical collector with high focal ratio Download PDFInfo
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- CN101738715B CN101738715B CN2009102734121A CN200910273412A CN101738715B CN 101738715 B CN101738715 B CN 101738715B CN 2009102734121 A CN2009102734121 A CN 2009102734121A CN 200910273412 A CN200910273412 A CN 200910273412A CN 101738715 B CN101738715 B CN 101738715B
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- collector
- focal ratio
- high focal
- optical surface
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- 230000003287 optical effect Effects 0.000 title claims abstract description 107
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000012528 membrane Substances 0.000 claims description 22
- 238000007747 plating Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 5
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 230000003760 hair shine Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Abstract
本发明公开了一种高焦比集光器，主要用于激光雷达、激光通信等系统的光学接收装置。该集光器的基材是一整块双凸透镜，背光面除中心区域外镀反光膜，向光面的中心磨一小凹面并镀反光膜；使得接收的信号光在材料内部进行一次折射与两次反射，汇聚成小光斑输出，口径与焦距之比大。优点在于：在激光雷达或激光通信系统中采用本发明，即可在相同接收口径下达到减小体积、安装简单、性能稳定、调试方便的目的。
The invention discloses a high focal ratio optical collector, which is mainly used for optical receiving devices of laser radar, laser communication and other systems. The base material of the light collector is a whole biconvex lens. The backlight surface is coated with a reflective film except the central area, and a small concave surface is ground toward the center of the light surface and coated with a reflective film; so that the received signal light is refracted and refracted inside the material. The two reflections are converged into a small spot output, and the ratio of the aperture to the focal length is large. The advantage lies in that: when the present invention is adopted in a laser radar or a laser communication system, the purposes of volume reduction, simple installation, stable performance and convenient debugging can be achieved under the same receiving aperture.
Description
Technical field:
The present invention relates to optics and receive, be mainly used in the optical receiver assembly of systems such as laser radar, laser communication.
Background technology:
In optical pickup apparatus, it is big more to receive the optics bore, and received light signal is strong more, and the focal length that receives optics is short more, just more little in identical bore lower volume.Receiving telescope commonly used has various ways such as convex lens refraction type, concave mirror are reflective, the catadioptric formula of Cassegrain, and under identical reception bore, the telescopical length of the catadioptric formula of Cassegrain is short, volume is less.Because in portable set, missile-borne and system such as spaceborne, spatial volume is limited or space resources is precious, even if the catadioptric formula receiving and transmitting unit of Cassegrain still seems too big; And the catadioptric formula receiving and transmitting unit of Cassegrain is made up of a plurality of optical elements, and to parts accuracy requirement height, assembling and debugging difficulty are big, and mechanical stability is easily affected by environment.Therefore, need at present a kind of littler in identical reception bore lower volume, structure is simpler, physical strength is bigger, littler optical transmitting and receiving device affected by environment.
Summary of the invention:
The objective of the invention is: a kind of optical collector with high focal ratio is provided.The base material of this optical collector is the biconvex lens of a monoblock, the shady face of biconvex lens plates reflective membrane except that the central area, reduction one little concave surface and plate reflective membrane in the phototropic face, make the flashlight that receives carry out unirefringence and two secondary reflections at material internal, pool small light spot output, bore is big with the ratio (being coke ratio) of focal length.Advantage is: adopt the present invention in laser radar or laser communication system, can be issued at identical reception bore and reduce volume, simple, stable performance is installed, debugs purpose easily.
To achieve these goals, the present invention adopts following technical scheme:
The base material of optical collector with high focal ratio is a monoblock BK7 material biconvex lens, and the shady face of biconvex lens is called second optical surface, plates reflective membrane MIRROR at second optical surface except that the central area, sees from base material one side reflective membrane on second optical surface to be a concave mirror; The phototropic face of biconvex lens is called first optical surface, and at the middle reduction one little concave surface of first optical surface, little concave surface is called the 3rd optical surface, and the 3rd optical surface plating reflective membrane MIRROR sees from base material one side reflective membrane on the 3rd optical surface to be a convex mirror.
In ZEMAX software, the optical texture parameter such as the following table of optical collector with high focal ratio:
Last tabular has gone out face type (Surf:Type), radius-of-curvature (Radius), optical thickness (Thickness), material type (Glass), bore radius (Semi-Diameter) and quadric surface (Conic) parameter of each optical surface and plated film, can obtain the curved surface of each optical surface of optical collector with high focal ratio and each plated film face according to these parameters, and the mutual relationship between each curved surface, can process optical collector with high focal ratio thus.
(2) principle of work
Flashlight shines on the optical collector with high focal ratio, reflect through first optical surface earlier, produce converging to a certain degree, shine then on the reflective membrane of second optical surface, the reflection of reflective membrane birefringence light is further converged, and reflected light shines on the reflective membrane of the 3rd optical surface, reflection takes place once more converge, at last from the center of second optical surface not plated film transmit optical collector with high focal ratio.
Advantage of the present invention is: optical collector with high focal ratio adopts a monoblock optical material, makes the flashlight that receives through unirefringence and two secondary reflections, pools very little hot spot, and bore is big with the ratio of focal length.In systems such as laser radar or laser communication,, can be issued at identical reception bore and reduce volume, simple, stable performance is installed, debugs purpose easily if adopt optical collector with high focal ratio of the present invention.
Description of drawings:
Fig. 1 is the optical collector with high focal ratio structural representation.
Wherein: 31 first optical surfaces, 32 second optical surfaces, 33 the 3rd optical surfaces.
Fig. 2 is the optical path-tracing figure of optical collector with high focal ratio.
Fig. 3 is the lidar transmit-receive apparatus structure synoptic diagram that adopts optical collector with high focal ratio.
Wherein: 1 laser instrument, 2 collimation lenses, 3 optical collector with high focal ratio, 4 photodetectors, 5 apertures, 11 leads, 31 first optical surfaces, 32 second optical surfaces, 33 the 3rd optical surfaces.
Embodiment:
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Embodiment one:
As shown in Figure 1, the base material of optical collector with high focal ratio is a monoblock BK7 material biconvex lens, and the shady face of biconvex lens is called second optical surface 32, plates reflective membrane at second optical surface 32 except that the central area, see from base material one side and reflective membrane MIRROR on second optical surface 32 to be a concave mirror; The phototropic face of biconvex lens is called first optical surface 31, at the middle reduction one little concave surface of first optical surface 31, little concave surface is called the 3rd optical surface 33, the three optical surfaces 33 plating reflective membrane MIRROR, see from base material one side and reflective membrane on the 3rd optical surface 33 to be a convex mirror.
In ZEMAX software, the optical texture parameter such as the following table of optical collector with high focal ratio:
Last tabular has gone out face type (Surf:Type), radius-of-curvature (Radius), optical thickness (Thickness), material type (Glass), bore radius (Semi-Diameter) and quadric surface (Conic) parameter of each optical surface and plated film, can obtain the curved surface of each optical surface of optical collector with high focal ratio and each plated film face according to these parameters, and the mutual relationship between each curved surface, can process optical collector with high focal ratio thus, its optical path-tracing figure as shown in Figure 2.
Embodiment two:
As shown in Figure 3, adopt the lidar transmit-receive device of optical collector with high focal ratio to form by Laser emission assembly and optics receiving unit.
The optics receiving unit is made up of optical collector with high focal ratio 3 and photodetector 4, in order to the echo optical signal of reception laser radar, and is converted to electric signal.The base material of optical collector with high focal ratio 3 is monoblock BK7 material biconvex lens, the shady face of biconvex lens is called second optical surface 32, on second optical surface 32, except that the central area, plate reflective membrane MIRROR, its not the area of plated film be the area of photodetector 4 photosurfaces; See from base material one side and reflective membrane on second optical surface 32 to be a concave mirror; The phototropic face of biconvex lens is called first optical surface 31, at the middle reduction one little concave surface of first optical surface 31, little concave surface is called plating reflective membrane MIRROR on the 3rd optical surface 33, the three optical surfaces 33, see from base material one side and reflective membrane on the 3rd optical surface 33 to be a convex mirror.
Adopt ZEMAX software, the optical texture parameter such as the following table of optical collector with high focal ratio 3:
The optical path-tracing figure of the optical collector with high focal ratio of being realized according to last table parameter 3 as shown in Figure 2.
The central area of second optical surface 32 not plated film place is used to install photodetector, its not the area of plated film be the area of photodetector photosurface.
The Laser emission assembly is made up of laser instrument 1 and collimation lens 2, in order to emission laser radar signal.Laser instrument 1 is installed in the 3rd optical surface 33 formed concave surfaces, in the front of laser instrument 1 collimation lens 2 is installed, both are at a distance of being one times of focal length of collimation lens 2, and collimation lens 2 is the very little light beam of divergence with laser beam reshaping.
In the edge of the 3rd optical surface 33, bore an aperture 5 along the optical axis direction of optical collector with high focal ratio 3, the lead 11 of laser instrument 1 passes from aperture 5.
Principle of work: the electric signal of laser radar is through lead 11 drive laser 1 emission laser, and emission laser is launched to target through collimation lens 2 shapings; Behind target scattering, echo optical signal turns back to optical collector with high focal ratio 3, earlier through 31 refractions of first optical surface, produce converging to a certain degree, shine then on the reflective membrane of second optical surface 32, reflective membrane birefringence light reflects, further converge, reflected light shines on the reflective membrane of the 3rd optical surface 33, reflects once more, converge on the photosurface of photodetector 4, photodetector 4 converts the echo optical signal that receives to electric signal.The emission and the reception of laser radar signal have been realized thus.
Claims (2)
1. optical collector with high focal ratio, it is characterized in that, the base material of this optical collector is a monoblock BK7 material biconvex lens, the shady face of biconvex lens is called second optical surface (32), plate reflective membrane at second optical surface (32) except that the central area, the phototropic face of biconvex lens is called first optical surface (31), at the middle reduction one little concave surface of first optical surface (31), little concave surface is called the 3rd optical surface (33), the 3rd optical surface (33) plating reflective membrane;
In ZEMAX software, the optical texture parameter such as the following table of optical collector with high focal ratio (3):
Can obtain the curved surface of each optical surface of optical collector with high focal ratio and each plated film face according to these parameters, and the mutual relationship between each curved surface, can process optical collector with high focal ratio thus.
2. optical collector with high focal ratio according to claim 1 is characterized in that, photodetector is installed in second optical surface (32) the central area not zone of plated film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102734121A CN101738715B (en) | 2009-12-25 | 2009-12-25 | Optical collector with high focal ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102734121A CN101738715B (en) | 2009-12-25 | 2009-12-25 | Optical collector with high focal ratio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101738715A CN101738715A (en) | 2010-06-16 |
| CN101738715B true CN101738715B (en) | 2011-06-15 |
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| CN2009102734121A Expired - Fee Related CN101738715B (en) | 2009-12-25 | 2009-12-25 | Optical collector with high focal ratio |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2608972C2 (en) * | 2012-04-26 | 2017-01-30 | Конинклейке Филипс Н.В. | Solid-state laser device with optical pumping and self-adjusted optics for pumping |
| JP2017072709A (en) * | 2015-10-07 | 2017-04-13 | 株式会社トプコン | Imaging optical member and optical system of surveying instrument |
| JP2019515258A (en) * | 2016-05-19 | 2019-06-06 | コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． | Small laser sensor |
| CN108303711A (en) * | 2017-12-19 | 2018-07-20 | 深圳市海梁科技有限公司 | A kind of reflecting strips and intelligent automobile laser radar detecting system |
| WO2022118036A1 (en) * | 2020-12-04 | 2022-06-09 | Ttp Plc. | Lidar receiver |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0109322A1 (en) * | 1982-11-05 | 1984-05-23 | Thomson-Csf | Double reflector antenna for a tracking radar improving the target acquisition capability |
| CN101078765A (en) * | 2007-07-05 | 2007-11-28 | 北京航空航天大学 | Laser radar remote sensing polarized imaging system |
| CN101477196A (en) * | 2009-01-16 | 2009-07-08 | 南京信息工程大学 | Vibrating Raman lidar scattered light processing system and processing method |
-
2009
- 2009-12-25 CN CN2009102734121A patent/CN101738715B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0109322A1 (en) * | 1982-11-05 | 1984-05-23 | Thomson-Csf | Double reflector antenna for a tracking radar improving the target acquisition capability |
| CN101078765A (en) * | 2007-07-05 | 2007-11-28 | 北京航空航天大学 | Laser radar remote sensing polarized imaging system |
| CN101477196A (en) * | 2009-01-16 | 2009-07-08 | 南京信息工程大学 | Vibrating Raman lidar scattered light processing system and processing method |
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| Publication number | Publication date |
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| CN101738715A (en) | 2010-06-16 |
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Granted publication date: 20110615 |