CN211042668U - Point source transmittance testing system of optical device - Google Patents
Point source transmittance testing system of optical device Download PDFInfo
- Publication number
- CN211042668U CN211042668U CN201922365676.1U CN201922365676U CN211042668U CN 211042668 U CN211042668 U CN 211042668U CN 201922365676 U CN201922365676 U CN 201922365676U CN 211042668 U CN211042668 U CN 211042668U
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- collimator
- optical
- flat
- supporting structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
The utility model relates to an optical device's point source transmissivity test system. A collimator is fixed at one end of an X axis of a supporting structure of the system, a two-dimensional turntable is arranged at the other end of the X axis of the supporting structure, and a photoelectric theodolite and an optical device to be detected are arranged on the two-dimensional turntable. The electro-optic theodolite is provided with a telescope capable of adjusting the azimuth angle and the pitch angle. The two-dimensional rotary table is a rotary table which is provided with a vertical Z-direction rotating shaft and a horizontal Y-direction rotating shaft and can adjust a horizontal azimuth angle and a vertical pitching angle. When in use, the rotation theta of the photoelectric theodolite and the rotation-theta of the two-dimensional turntable are adjusted1The center of the flat-top optical fiber in the field of view returns to the center of the cross wire, and the angle at the moment and the point source transmittance PST corresponding to the optical device to be tested are recorded; continuously adjustingThe rotation angle of the photoelectric theodolite is saved to obtain a series of thetaiAnd corresponding PST (theta)i) The PST curve is made. The system improves the dynamic range of point source transmittance measurement, and has the advantages of simple principle, convenient operation and easy implementation.
Description
Technical Field
The utility model relates to an optical detection field specifically is an optical device's point source transmittance test system.
Background
In a wireless optical communication system, in order to realize the establishment of a long-distance communication link, the establishment of a long-distance communication link is usually started from three aspects, namely, the reduction of the divergence angle of a transmitting end, the increase of the receiving aperture of a receiving end and the increase of the sensitivity of a photoelectric detector. In practical applications, the reduction of the divergence angle of the emitted beam is limited due to diffraction limitations and tracking accuracy. Due to the manufacturing process limitation of the large-aperture objective lens, the requirements of equipment volume, weight and turntable power consumption, the aperture of the receiving objective lens cannot be increased all the time. The design of high sensitivity detectors is another direction of development. With the increasing communication distance, the required detector sensitivity requirement is higher and higher, and the problem with the required detector sensitivity is that the influence of stray light is more and more prominent.
Stray light rejection of off-axis point sources of optical systems is typically expressed in terms of Point Source Transmittance (PST). The PST is defined as the ratio of the irradiance produced at the image plane after a light source with the off-axis angle theta outside the field of view of the optical system passes through the optical system to the irradiance at the entrance pupil. A common stray light test and evaluation method at home and abroad is a point source transmittance test method. The testing method has the advantages of precise requirements on the rotary table, high electric control requirements, large equipment volume and no contribution to the popularization of engineering application; the existing test equipment has a complex mode of generating uniformly distributed parallel light; the wavelength of the light source of the collimator is fixed, and the wavelength of visible light to near infrared or even middle and far infrared wave bands cannot be considered; the dynamic range of the test is narrow, and the measurement of the stray light power from a large angle to the edge of a view field cannot be considered.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a point source transmittance testing system of an optical device, which comprises a supporting structure, a collimator, a two-dimensional turntable and a photoelectric theodolite, wherein the collimator is fixed at one end of an X axis of the supporting structure, and outputs light along the X axis direction; a two-dimensional turntable capable of adjusting the horizontal angle and the pitch angle is arranged at the other end of the X axis. And the two-dimensional turntable is provided with the photoelectric theodolite and the optical device to be tested. The electro-optic theodolite is provided with a telescope capable of adjusting the azimuth angle and the pitch angle. Adjusting the two-dimensional turntable to enable the optical axis of the optical device to be measured to be parallel to the optical axis of the light emitted by the collimator, and measuring the light power value at the entrance pupil of the optical device to be measured; adjusting the attenuation of the variable optical attenuator; adjusting the center of the flat-top optical fiber at the focal point of the collimator of the electro-optic theodolite to be at the center of the cross wire of the telescope; rotation angle theta of photoelectric theodolite1Adjusting the rotation-theta of the two-dimensional turntable1The center of the flat-top optical fiber is positioned at the center of the cross wire of the theodolite telescope again, and the light power value P (theta) received by the photoelectric detector at the moment is recorded1) And calculating the point source transmittance PST (theta) of the optical device to be measured at the moment1) (ii) a Continuously adjusting the photoelectric theodolite to rotate the angle delta theta to obtain a series of thetaiAnd P (theta)i) And making a PST curve of the optical device to be tested. The system improves the dynamic range of point source transmittance measurement, and has the advantages of simple principle, convenient operation and easy implementation and application.
The utility model relates to a point source transmittance test system of optical device, the optical device of this system test includes lens group and photoelectric detector, the lens group is a lens, or the combination of a plurality of lenses and light filter, optical device has single straight line optical axis, photoelectric detector is located the focus of lens group; the size of the detection surface of the photoelectric detector determines the focal length and the field of view of the lens group, namely the product of the focal length and the field of view of the lens group is equal to the area of the detection surface of the photoelectric detector, which is hereinafter referred to as an optical device to be detected. The system comprises a supporting structure, a collimator and an electro-optic theodolite, wherein the electro-optic theodolite is provided with a telescope capable of adjusting an azimuth angle and a pitch angle.
The collimator comprises a main reflecting mirror, a secondary reflecting mirror and a light source emitting device, wherein the light source emitting device comprises a flat-top optical fiber, a variable optical attenuator, an optical fiber jumper and a laser. The output end of the laser is connected with one end of an optical fiber jumper, and the other end of the optical fiber jumper is connected with the input end of the variable optical attenuator. The output end of the adjustable optical attenuator is connected with one end of the flat-top optical fiber, the other end of the flat-top optical fiber is fixed on the supporting structure, the end of the flat-top optical fiber is the light source emitting end of the collimator, and the central point of the end face of the end is located at the focus of the collimator. The numerical aperture of the flat-top optical fiber, the numerical aperture of the optical fiber jumper and the relative aperture of the parallel light pipe are matched with each other. The main reflector and the secondary reflector are fixed on the supporting structure, light emitted by the flat-top optical fiber reaches the secondary reflector above the flat-top optical fiber, the secondary reflector reflects light beams to the main reflector, the light beams reflected by the main reflector are parallel light beams, and the central line of the light beams is the optical axis of the collimator. The parallel light tube is provided with a red collimated indicating light source, and the indicating light source and the light source emitting device are fixed on the electric horizontal guide rail. The red indicating light emitted by the indicating light source is positioned on the optical axis of the collimator.
The system also comprises a two-dimensional turntable, wherein the installation horizontal plane of the supporting structure is an X, Y plane, the collimator is fixed on the supporting structure and is positioned at one end of the X axis, and the output light of the collimator faces the two-dimensional turntable along the X axis direction of the supporting structure; the two-dimensional rotary table is arranged at the other end of the X axis on the supporting structure and is a rotary table which is provided with a vertical Z-direction rotating shaft and a horizontal Y-direction rotating shaft and can adjust the horizontal azimuth angle and the vertical pitching angle. The two-dimensional turntable is provided with the photoelectric theodolite, and the optical device to be detected is also fixed on the two-dimensional turntable.
The optical power attenuation value of the variable optical attenuator is equal to or more than 50dB, and the variable optical attenuator is provided with a screen for displaying the attenuation amount.
The flat-top optical fiber emits light beams with uniform spatial distribution from visible light to middle and far infrared wave bands.
The optical fiber jumper is connected with the laser through an optical fiber interface or a flange plate. When the laser is in spatial output, the coupling lens is configured to couple the output laser to the output optical fiber, and the output optical fiber is connected with the optical fiber jumper through the optical fiber interface or the flange plate.
And a horizontal rotating shaft and a vertical rotating shaft of the two-dimensional turntable are both provided with a manual thread adjusting mechanism.
Adopt the utility model discloses a when optical device's point source transmissivity test system used, earlier at optical power value P is measured with space optical power meter in optical device's the receipt objective focus department that awaits measuring, then the optical power value of optical device entrance pupil department that awaits measuring, the optical power value on optical device objective receiving surface that awaits measuring promptly is P0P/T; t is the lens transmittance T of the receiving objective of the optical device under test. Adjusting a telescope of the photoelectric theodolite to enable the center of the flat-top optical fiber in the field of view of the telescope to be located at the center of a cross wire of the telescope; and adjusting the rotation angle theta of the photoelectric theodolite, adjusting the two-dimensional turntable to rotate reversely by the same angle theta, so that the center of the flat-top optical fiber in the telescope field is positioned at the center of the cross wire of the photoelectric theodolite telescope again, and the angle of the optical axis of the optical device to be tested deviating from the parallel light pipe to emit parallel light is theta at the moment, namely the incident angle of the parallel light beam entering the receiving objective of the optical device to be tested is theta. Recording the light power value received by the photoelectric detector at the moment, and calculating the point source transmittance PST of the optical device to be measured at the moment; continuously adjusting the photoelectric theodolite to obtain a series thetaiAnd drawing a point source transmittance curve of the optical device to be measured according to the corresponding point source transmittance, and completing the current test of the point source transmittance PST of the optical device to be measured.
Compared with the prior art, the utility model relates to an optical device's point source transmittance test system's beneficial effect is: 1. the system adopts the flat-top optical fiber and the two reflectors to generate uniform parallel light, the method is simple, the flat-top optical fiber emits light in a range from visible light to middle and far infrared bands, the spectrum application range is wide, and engineering application is facilitated; 2. the system adopts the manual threaded turntable to match with the photoelectric theodolite, so that the equipment is simple, the size is small, the occupied area is small, and the operability is strong; 3. the optical fiber jumper is connected with the laser through an optical fiber interface or a flange plate, so that the laser with various wavelengths can be conveniently accessed; 4. the adjustable optical attenuator improves the dynamic range of point source transmittance measurement, and improves the dynamic range by at least 50dB on the basis of the sensitivity of the photoelectric detector; 5. the testing principle is simple, the operation is convenient, and the implementation and the application are easy.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of a point source transmittance testing system of the present optical device;
FIG. 2 is a schematic diagram of an optical device according to an embodiment of the present optical device for measuring point source transmittance;
FIG. 3 is a schematic view of a collimator structure of an embodiment of the point source transmittance testing system of the optical device.
The reference number in the figure is 1, an electro-optic theodolite, 2, an optical device to be measured, 21, a receiving objective, 22, an objective focus, 23, an eyepiece, 24, an optical filter, 25, a focusing lens, 26, a photoelectric detector, 3, a two-dimensional turntable, 4, a supporting structure, 5, a collimator, 51, a main reflector, 52, a secondary reflector, 53, a flat-top optical fiber, 54, a tunable optical attenuator, 55, an optical fiber jumper, 56 and a laser.
Detailed Description
In order to make the technical solution of the present invention clearer, the following description is made in detail with reference to the accompanying drawings.
The overall structure schematic diagram of the point source transmittance testing system of the optical device is shown in fig. 1, and comprises a supporting structure 4, a collimator 5, a two-dimensional turntable 3 and a photoelectric theodolite 1, wherein the installation horizontal plane of the supporting structure 4 is X, Y plane, the collimator 5 is fixed on the supporting structure 4 and is positioned at one end of an X axis, and the output light of the collimator is along the X axis direction of the supporting structure 4; the two-dimensional rotary table 3 is arranged at the other end of an X axis on the supporting structure 4, and the two-dimensional rotary table 3 is provided with a vertical Z-direction rotating shaft and a horizontal Y-direction rotating shaft of a manual thread adjusting mechanism and can adjust a horizontal azimuth angle and a vertical pitching angle. The photoelectric theodolite 1 is arranged on the two-dimensional rotary table 3, and the optical device 2 to be measured is also fixed on the two-dimensional rotary table 3. The electro-optic theodolite 1 is equipped with a telescope capable of adjusting the azimuth angle and the pitch angle.
In the optical device 2 to be measured of this embodiment, as shown in fig. 2, the lens group includes a receiving objective 21, an eyepiece 23, a filter 24 and a focusing lens 25, the focal point 21 of the receiving objective is located in front of the eyepiece 23, and the centers of the elements are all located on the same straight optical axis. A photodetector 26 is placed at the focal point of the optical device under test 2 in this example. The photodetector 26 of the optical device under test in this example has a diameter of 0.5mm and a field of view of 1.8mrad (. + -. 0.9 mrad). The focal length of the optical device 2 to be measured is 0.5mm/1.8mrad＝278mm。
The collimator of this example is shown in FIG. 3 and comprises a primary mirror 51, a secondary mirror 52, and a light source emitting device comprising a flat-topped optical fiber 53, a variable optical attenuator 54, an optical fiber jumper 55, and a laser 56. The output end of the laser 56 is connected with one end of an optical fiber jumper 55 through an optical fiber interface, and the other end of the optical fiber jumper 55 is connected with the input end of the adjustable optical attenuator 54. The output end of the adjustable optical attenuator 54 is connected with one end of the flat-top optical fiber 53, the other end of the flat-top optical fiber 53 is fixed on the supporting structure 4, the end of the flat-top optical fiber 53 is the light source emission end of the collimator 5, and the end face center point of the end is positioned at the focus of the collimator. The numerical aperture of the flat-top optical fiber 53, the numerical aperture of the optical fiber jumper wire 55 and the relative aperture of the collimator 5 are matched with each other; the main reflector 51 and the secondary reflector 52 are fixed on the support structure 4, the light emitted by the flat-top optical fiber 53 reaches the secondary reflector 52 above the flat-top optical fiber, the secondary reflector 52 reflects the light beam to the main reflector 51, the light beam reflected by the main reflector 51 is a parallel light beam, the light beam is parallel to the X axis of the support structure 4 and faces the two-dimensional turntable 3, and the central line of the light beam is the optical axis of the collimator 5; the collimator 5 is provided with a red collimated indicating light source, and the indicating light source and the light source emitting device are fixed on the electric horizontal guide rail. The red indicating light emitted by the indicating light source is positioned on the optical axis of the collimator.
The maximum optical power attenuation of the variable optical attenuator 54 of this example is 70dB (i.e., maximum attenuation 1 x 10)-7) And is provided with a screen displaying the attenuation amount.
The flat-topped optical fiber 53 of this example emits a spatially uniformly distributed beam of visible light to the mid-and far-infrared bands.
The above embodiments are only specific examples for further detailed description of the objects, technical solutions and advantages of the present invention, and the present invention is not limited thereto. Any modification, equivalent replacement, improvement and the like made within the scope of the disclosure of the present invention are all included in the protection scope of the present invention.
Claims (5)
1. A point source transmittance test system of an optical device comprises a lens group and a photoelectric detector, wherein the lens group is a lens, or a combination of a plurality of lenses and a light filter; the system comprises a supporting structure (4), a collimator (5) and a photoelectric theodolite (1);
the photoelectric theodolite (1) is provided with a telescope capable of adjusting an azimuth angle and a pitch angle;
the collimator (5) comprises a main reflecting mirror (51), a secondary reflecting mirror (52) and a light source emitting device, wherein the light source emitting device comprises a flat-top optical fiber (53), a variable optical attenuator (54), an optical fiber jumper (55) and a laser (56); the output end of the laser (56) is connected with one end of an optical fiber jumper (55), and the other end of the optical fiber jumper (55) is connected with the input end of the variable optical attenuator (54); the output end of the variable optical attenuator (54) is connected with one end of the flat-top optical fiber (53), the other end of the flat-top optical fiber (53) is fixed on the supporting structure (4), the end of the flat-top optical fiber (53) is a light source emitting end of the collimator (5), and the center point of the end surface of the end is positioned at the focus of the collimator (5); the numerical aperture of the flat-top optical fiber (53), the numerical aperture of the optical fiber jumper wire (55) and the relative aperture of the collimator (5) are matched with each other; the main reflector (51) and the secondary reflector (52) are fixed on the supporting structure (4), light emitted by the flat-top optical fiber (53) reaches the secondary reflector (52) above the flat-top optical fiber, the secondary reflector (52) reflects light beams to the main reflector (51), the light beams reflected by the main reflector (51) are parallel light beams, and the central line of the light beams is the optical axis of the collimator (5); the collimator (5) is provided with a red collimated indicating light source, and the indicating light source and the light source emitting device are fixed on the electric horizontal guide rail; the red indicating light emitted by the indicating light source is positioned on the optical axis of the collimator (5); the method is characterized in that:
the system further comprises a two-dimensional turntable (3);
the mounting horizontal plane of the supporting structure (4) is an X, Y plane, the collimator (5) is fixed on the supporting structure (4) and is positioned at one end of the X axis, and the output light of the collimator is along the X axis direction of the supporting structure (4); the two-dimensional rotary table (3) is arranged at the other end of the X axis on the supporting structure (4), is provided with a vertical Z-direction rotating shaft and a horizontal Y-direction rotating shaft, and can adjust the horizontal azimuth angle and the vertical pitching angle; the photoelectric theodolite (1) is arranged on the two-dimensional rotary table (3), and the optical device (2) to be measured is also fixed on the two-dimensional rotary table (3).
2. The point source transmittance testing system for an optical device according to claim 1, wherein:
the variable optical attenuator (54) has an optical power attenuation value equal to or greater than 50dB and is provided with a screen for displaying the attenuation.
3. The point source transmittance testing system for an optical device according to claim 1, wherein:
the flat-top optical fiber (53) emits light beams with uniform spatial distribution from visible light to middle and far infrared bands.
4. The point source transmittance testing system for an optical device according to claim 1, wherein:
the optical fiber jumper (55) is connected with a laser (56) through an optical fiber interface or a flange plate; when the laser (56) is a space output, the coupling lens is configured to couple the output laser to the output optical fiber, and the output optical fiber is connected with the optical fiber jumper (55) through an optical fiber interface or a flange plate.
5. The point source transmittance testing system for an optical device according to claim 1, wherein:
and a horizontal rotating shaft and a vertical rotating shaft of the two-dimensional turntable (3) are both provided with manual thread adjusting mechanisms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922365676.1U CN211042668U (en) | 2019-12-25 | 2019-12-25 | Point source transmittance testing system of optical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922365676.1U CN211042668U (en) | 2019-12-25 | 2019-12-25 | Point source transmittance testing system of optical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211042668U true CN211042668U (en) | 2020-07-17 |
Family
ID=71530409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922365676.1U Active CN211042668U (en) | 2019-12-25 | 2019-12-25 | Point source transmittance testing system of optical device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211042668U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236510A (en) * | 2021-12-02 | 2022-03-25 | 桂林理工大学 | System for testing laser radar transmittance stray light in water depth measurement |
-
2019
- 2019-12-25 CN CN201922365676.1U patent/CN211042668U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236510A (en) * | 2021-12-02 | 2022-03-25 | 桂林理工大学 | System for testing laser radar transmittance stray light in water depth measurement |
| CN114236510B (en) * | 2021-12-02 | 2023-06-23 | 桂林理工大学 | Laser radar transmissivity stray light test system for measuring water depth |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108152013B (en) | Electro-optical system pointing accuracy measuring device optical path adjusting process | |
| CN103206964B (en) | Spectral-weight-tunable weak light magnitude simulation system | |
| CN110186653B (en) | Optical axis consistency calibration and split image fixed focus adjustment device and method for non-imaging system | |
| CN202522516U (en) | Optical transmissivity test device | |
| CN103207063B (en) | Spectrum weight adjustable spectrum simulation system | |
| CN103983571A (en) | Detector pixel response nonuniform error correction device and correction method thereof | |
| CN104539349A (en) | Multifunctional laser space communication ground test system and static parameter test method | |
| CN102183359B (en) | Method and device for detecting collimation of light beams | |
| CN107817094B (en) | High-precision homodromous double-optical-axis and multi-optical-axis parallelism adjusting method | |
| CN107356914B (en) | Calibration system for satellite-borne laser radar detector | |
| CN109813529A (en) | Optical parameter detection device for laser photoelectricity detection system | |
| CN211042668U (en) | Point source transmittance testing system of optical device | |
| CN111024372A (en) | Point source transmittance testing system and method for optical device | |
| CN107817095B (en) | High-precision homodromous double-optical-axis and multi-optical-axis parallelism adjusting method | |
| CN103424749A (en) | Full-optical-fiber laser radar visibility meter | |
| Kokkalis | Using paraxial approximation to describe the optical setup of a typical EARLINET lidar system | |
| CN202471089U (en) | Spectral-weight-tunable weak light magnitude simulation system | |
| CN116519136B (en) | Same-optical-axis adjustment system and method for moon direct spectrum irradiance instrument | |
| CN110109262B (en) | Coaxiality debugging system and method for light source switching multiplexing unit | |
| CN111707448B (en) | Efficiency detection device and efficiency detection method for optical component of space laser communication terminal | |
| CN107421721B (en) | Scattered light receiving system transmissivity calibration device based on scattering plate | |
| CN109668636B (en) | Imaging type spectrum radiation receiving and light splitting integrated device | |
| CN208795461U (en) | It is a kind of for integrating the integrated detection device of visual field fiber spectrometer optical fiber property | |
| CN202433172U (en) | Device for measuring transmission-type grating diffraction efficiency by using parabolic reflector | |
| CN204129332U (en) | Optical attenuator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |