CN213240689U

CN213240689U - Light path calibration tool

Info

Publication number: CN213240689U
Application number: CN202022527043.9U
Authority: CN
Inventors: 唐世彪; 王浩; 代云启
Original assignee: Quantumctek Co Ltd
Current assignee: Quantumctek Co Ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-05-18
Anticipated expiration: 2030-11-04

Abstract

The utility model provides an instrument is markd to light path, including the dead lever of coaxial setting with mark the pole, the diameter of marking the pole is roughly the same with the facula diameter of waiting to mark, the dead lever can be with the fixed orifices on optical platform surface along the axial cooperation of pegging graft, makes to mark the pole and be in waiting to mark the light path and place in the optical platform top. The utility model has the advantages that: the dead lever can directly peg graft in the fixed orifices, need not use screwed connection, can realize the quick plug of demarcation instrument during the use, convenient to use. The utility model is suitable for an optical experiment in quantum communication, quantum measurement equivalent quantum information field.

Description

Light path calibration tool

Technical Field

The utility model relates to a light path debugging technical field especially relates to a light path calibration instrument.

Background

In optical experiments and related applications using point light sources, light is generally required to be vertically incident on some optical lenses, especially in quantum optical experiments, and whether the adjustment of the light path is accurate or not often directly affects the experimental result, so it is important to maintain the alignment of the light path, i.e. no offset exists in the horizontal direction and the vertical direction. The existing method for adjusting the light path alignment is generally a multi-diaphragm method, such as a method for quickly assembling and adjusting a folded resonant cavity of a laser disclosed in the patent application with the publication number of CN104242029A, that is, a method for calibrating light rays by using a diaphragm is disclosed; the diaphragm is a shading piece with a light ray through hole on the surface; referring to fig. 1, a beam of indicating light 10 is set up along the axial direction of the center of the fixed laser crystal 1, and the axial direction is calibrated by small-

hole diaphragms

11 and 12; placing small-

hole diaphragms

21 and 22 on the vertical L-shaped reflecting light path, adjusting the angle of the 45-degree reflector 4 to enable the reflected light beam to pass through the centers of the two diaphragms, and fixing the 45-degree reflector 4; constructing an indicating light 20 on a reflected light path, enabling the indicating light to pass through the

small hole diaphragms

11, 12, 21 and 22, and canceling the original indicating light 10; the

cavity mirrors

6 and 7 are respectively arranged at the two ends of the resonant light path, so that the light reflected by the

cavity mirrors

6 and 7 returns to the indicating light 20. The resonator has the working mode as follows: the pump light path is composed of an LD pump light source 8 and a coupling lens group 9, and the pump light passes through the center of the laser crystal 1 after being collimated and focused by the coupling lens. And increasing the pumping current, then finely adjusting the angles of the

cavity mirrors

6 and 7, and simultaneously observing whether the output mirror outputs laser. If not, the current can be properly increased and then the angles of the

cavity mirrors

6 and 7 can be finely adjusted until laser output exists.

The existing multi-diaphragm calibration method has the following problems:

(1) the diaphragm needs to be screwed into a fixing hole penetrating through the surface of the optical platform to calibrate the light path each time the light rays are turned, the calibration process is relatively complex, and the use is inconvenient;

(2) because a plurality of diaphragms are needed to be used for calibration at the same time, the accuracy of light calibration can be influenced due to different processing technological errors of different diaphragms;

(3) the diaphragm support is of a threaded structure, the diaphragm support needs to be screwed into the fixing hole of the optical platform in a manual rotating mode, and the positions of the screwed fixing holes are different due to different torsion, so that inaccurate light ray calibration is caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that solve lies in how to simplify the operation and improve the precision that the light path was markd.

The utility model discloses a solve above-mentioned technical problem through following technical scheme: the utility model provides a light path calibration instrument, includes the dead lever and the demarcation pole of coaxial setting, and the diameter of demarcation pole is roughly the same with the facula diameter of waiting to demarcate, the dead lever can be followed the axial grafting cooperation with the fixed orifices on optical platform surface, makes the demarcation pole be in the light path of waiting to demarcate and place in the optical platform top.

The utility model provides an instrument is markd to light path, dead lever can directly peg graft in the fixed orifices, need not use screwed connection, can realize the quick plug of demarcation instrument during the use, convenient to use.

Preferably, the diameter of the calibration rod is larger than that of a fixing hole of the optical platform, and the fixing rod is in transition fit with the fixing hole.

Preferably, the fixing rod is a cylinder with a uniform and smooth surface.

Preferably, the fixing rod is integrally formed with the calibration rod.

Preferably, the calibration rod is detachably and fixedly connected with the fixing rod.

Preferably, the fixing rod is provided with external threads, the calibration rod is provided with a recessed counter bore, the counter bore is provided with internal threads, and the fixing rod can be in threaded connection with the counter bore on the calibration rod.

Preferably, the optical platform further comprises a mounting seat above the optical platform, the size of the mounting seat is larger than the diameter of the fixing hole of the optical platform, and the calibration rod and the fixing rod are respectively arranged on the upper side and the lower side of the mounting seat and are vertically connected with the mounting seat.

Preferably, the calibration rod is detachably fixed on the mounting seat.

Preferably, a fixing bolt coaxial with the fixing rod is fixed on the upper surface of the mounting seat along the vertical direction, a matching hole is axially formed in the bottom of the calibration rod, and the matching hole is provided with an internal thread matched with the fixing bolt in a threaded mode.

Preferably, the surface of the calibration rod is provided with a scale.

The utility model provides an instrument is markd to light path's advantage lies in:

(1) the calibration tool can be directly plugged and disassembled, and the working position can be switched quickly and conveniently;

(2) judging the calibration result according to whether the light spot can be completely covered by the calibration rod or not, and preventing the calibration accuracy from being influenced by machining errors;

(3) the surface of the calibration rod is provided with scales, the height of a light spot can be directly read, the fixed rod is matched with the fixed hole in an inserting mode, and when calibration is carried out at different positions, the depth of the fixed rod entering the fixed hole is consistent, so that the height error caused by different screwing positions when a screw is used for fixing is solved;

(4) the surface of the fixing rod is uniform and smooth and is in transition fit with the fixing hole, so that the fixing rod can be ensured to be completely inserted into the fixing hole, and the fixing rod is ensured to be positioned on the upper surface of the optical platform at different positions; errors caused by calibration in the vertical direction when the insertion positions are switched are prevented;

(5) the calibration rod is detachably and fixedly matched with the fixed rod or the mounting seat, so that the corresponding calibration rod can be conveniently replaced according to the size of the light spot; is convenient to use.

Drawings

FIG. 1 is a drawing referred to in the background of the invention;

fig. 2 is a schematic view of a light path calibration tool according to a first embodiment of the present invention;

fig. 3 is an exemplary optical path diagram provided in the first embodiment of the present invention;

fig. 4 is a schematic view of a light path calibration tool according to a second embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention are described in detail and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are not all but some of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example one

As shown in fig. 2, the present embodiment provides an optical path calibration tool, which is suitable for optical experiments in the field of quantum information such as quantum communication and quantum measurement, and includes a fixing rod 5 and a calibration rod 2 coaxially disposed, where the diameter of the calibration rod 2 is substantially the same as the diameter of a light spot to be calibrated; the fixing rod 5 can be axially inserted into and matched with a fixing hole of an optical platform (not shown), so that the calibration rod 2 is positioned on a light path to be calibrated and is placed above the optical platform.

Based on the above embodiments, the use method of the optical path calibration tool provided by this embodiment is as follows:

step A: selecting a calibration rod 2 with the same diameter according to the size of the light spot, and fixedly connecting the selected calibration rod 2 with a fixed rod 5;

and B: inserting the fixed rod 5 into the first section of the uncalibrated light path to enable the calibration rod 2 to be positioned on the light path;

and C: if the light spot is completely covered by the calibration rod 2, returning to the step B; otherwise, adjusting the optical device at the front end of the section of the interval until the light spot is completely covered by the calibration rod 2, and then returning to the step B until all the intervals of the light path to be calibrated are calibrated.

The light path calibration tool can quickly and conveniently realize the calibration of the light path in the horizontal direction, and ensure that no deflection in the horizontal direction exists; the calibration result has higher precision and convenient use.

In the light path debugging stage, the light path calibration tool is respectively arranged between two optical devices (for example, between a laser and a reflector), and the fixing rod 5 is inserted into and matched with the fixing hole of the optical platform, so that the calibration rod 2 can be fixed on the optical platform in a manner of being perpendicular to the surface of the optical platform; the calibration rod 2 is made to block the light path, because the diameter of the light spot is approximately the same as that of the calibration rod 2, if the light spot can basically cover the width range of the calibration rod 2, the horizontal direction of the light path before the calibration rod 2 is considered to be satisfactory, and if the light spot can not basically cover the width range of the calibration rod 2, the horizontal direction of an optical device before the calibration rod 2 needs to be adjusted, so that the light path is ensured not to have deflection in the horizontal direction. When the calibration is carried out, the fixing rod 5 can be directly inserted into the fixing hole without using screws for connection, so that the calibration tool can be quickly inserted and pulled out during use, and the use is convenient; the calibration result is judged according to whether the light spot is completely covered by the calibration rod 2, so that the light path calibration precision is high; and can directly use the facula to shine calibration rod 2 before the experiment and examine whether the size is suitable, prevent to demarcate the precision because of the influence of machining error.

The optical platform with the fixing hole is a common experimental device in the field, and in the preferred embodiment, the calibration rod 2 is made of a light-shielding material, so that the calibration rod 2 needs to be inserted into each section of optical path from front to back in sequence for calibration. Technical personnel in the field can also be based on the utility model of this application think about, use transparent material preparation calibration rod 2, can all set up the demarcation instrument that is used for maring in each section light path this moment, adjust optical device in proper order from the front to the back and make the facula on each section light path all completely through the width range of calibration rod 2, the refraction that light passed calibration rod 2 and the diameter error of different calibration rod 2 all probably influence the calibration result this moment, consequently generally can not use transparent calibration rod 2 to mark in a plurality of positions simultaneously.

The above method can only calibrate the horizontal direction of the light path, so as to ensure that no deflection in the horizontal direction exists, sometimes the calibration in the vertical direction needs to be performed, the surface of the calibration rod 2 is also provided with scales 21, so that the height of the light spot can be measured, when the height calibration is performed, at least two positions are selected on the first section of the light path to respectively obtain the height of the light spot, two positions close to the front and rear optical devices are generally selected to measure, whether the light spot has the deflection is determined, and if the front and rear heights are not consistent, the front optical device needs to be adjusted until the heights of the light spots at the two positions are consistent; after the calibration of the first section of the light path is finished, the subsequent light paths are sequentially adjusted by using the same method, if the heights of the light spots in the subsequent light paths are consistent with the height of the light spot in the first section of the light path and the heights of the two light spots in the same section of the light path are consistent, the vertical direction of the light path in the section is considered to be in accordance with the requirement, and if the scales are not consistent, the adjustment is carried out. The heights of the light rays passing through the calibration rods 2 at different positions are kept consistent, so that the deflection in the vertical direction is adjusted and calibrated, and the accurate calibration of a light path is realized; because the fixed rod 5 is completely inserted into the fixed hole, when the calibration position is replaced, the bottom surface of the calibration rod 2 is in contact with the surface of the optical platform, and the calibration result is judged at different positions through scale values, so that the calibration error caused by replacement of the position is avoided, and the calibration precision is improved.

Based on the setting of above scale 21, the light path calibration tool that this embodiment provided can calibrate horizontal direction and vertical direction simultaneously, and the use as follows:

step I: selecting a calibration rod 2 with the same diameter according to the size of the light spot, and coaxially and fixedly connecting the calibration rod 2 with a fixed rod 5;

step II: selecting two calibration points in a first section of an uncalibrated light path, and sequentially inserting a calibration tool into the optical platform fixing holes corresponding to the two calibration points respectively;

step III: and (3) adjusting an optical device at the front end of the current interval to enable the light spot to be covered by the calibration rod 2 at the two calibration points, enabling scale values on the two calibration rods 2 to be consistent, and returning to the step (II) until all intervals of the light path to be calibrated are calibrated.

When the light spot height is adjusted, the position of the calibration tool may need to be changed by plugging and unplugging for many times, only the light spot heights of any two points on the light path are required to be consistent, and the light path in the later section also ensures that the light spot height is consistent with the light spot height in the first section; therefore, the calibration of the horizontal direction and the vertical direction of the optical path is realized, the accuracy is high, the use is convenient, the calibration error caused by the production error is avoided, and the popularization prospect is good.

If the spot height is known before calibration, only one calibration point per optical path can be selected for horizontal and vertical calibration.

Further, when the light path is calibrated, if the light path is debugged by one section, the operation is more complicated, most light paths only care whether the final emergent light meets the requirements or not, therefore, the final emergent light path can only be calibrated, two calibration points are selected on the final calibration light path and are respectively calibrated by using a calibration tool, the light heights of two points are firstly obtained respectively, then the light path is adjusted according to the light heights based on the requirements, the light heights of the light rays of the emergent light path at the two calibration points meet the requirements and are all covered by the calibration rod 2, so that the horizontal direction and the vertical direction of the light path both meet the requirements of the emergent light, and the light path debugging work is completed.

Referring to fig. 2 again, based on the above working principle, a person skilled in the art may set the calibration tool to include only one fixing rod 5 and the calibration rod 2 coaxially and fixedly connected to the fixing rod 5, and the fixing rod 5 is in transition fit with the fixing hole, so that the fixing rod 5 can be conveniently and directly inserted into the fixing hole, and substantially no shaking exists, thereby preventing the calibration rod 2 from tilting relative to the optical platform, and the precision is high; the surface of the fixing rod 5 is uniform and smooth, so that the fixing rod can be completely inserted into the fixing hole, the lower surface of the calibration rod 2 is in contact with the upper surface of the optical platform, the height of the calibration tool is kept consistent when calibration is carried out at different positions, and the calibration rod 2 and the fixing rod 5 can be integrally formed at the moment.

In order to conveniently replace the calibration rod 2 with a corresponding diameter according to the size of a light spot, the fixing rod 5 and the calibration rod 2 are detachably and fixedly matched, the fixing mode can be connected by selecting the prior art according to needs, for example, the fixing rod 5 is provided with an external thread, the calibration rod 2 is provided with an inwards concave counter bore and an internal thread, and the fixing rod 5 and the calibration rod 2 are connected by screwing; although the calibration rod 2 is connected by the screw thread, the position of the calibration rod 2 does not need to be adjusted after the connection, namely the tightness of the screw thread is not adjusted, and the subsequent work only needs to insert the fixing rod 5, so that the tightness of the screw thread does not cause the difference of the calibration results.

Because the whole calibration tool is fixed in the fixed hole in an inserting way, if the diameter of the calibration rod 2 is not larger than that of the fixed hole, the whole calibration tool can directly slide off the optical platform from the fixed hole, so that the light path calibration cannot be carried out; therefore, the calibration tool provided by the above embodiment is only suitable for the case that the diameter of the light spot is larger than that of the fixed hole. When the light spot smaller than the diameter of the fixing hole is used for testing, a person skilled in the art can directly screw a fixing nut and other limiting parts on the fixing rod 5 to prevent the calibration tool from falling off.

Example two

Referring to fig. 4, in this embodiment, the optical path calibration tool further includes an installation seat 3 located above the optical platform, the calibration rod 2 and the fixing rod 5 are respectively vertically connected to the upper end surface and the lower end surface of the installation seat 3, at this time, the fixing rod 5 is still in transition fit with the fixing hole, and the diameter of the installation seat 3 is greater than that of the fixing hole, so that the calibration tool is prevented from sliding off the fixing hole, the calibration rod 2 and the fixing rod 5 are coaxially arranged to perform optical path calibration, and since the limitation can be performed by the installation seat 3, the diameter of the calibration rod 2 can be smaller than that of the fixing hole, the calibration tool shown in fig. 4 can adapt to light spots of any size.

The calibration process of the calibration tool provided by the embodiment is as follows:

step A: selecting a calibration rod 2 with the same diameter according to the size of a light spot, and coaxially and fixedly connecting the selected calibration rod 2 with the mounting base 3;

and B: inserting a fixed rod 5 into a first section of interval of an uncalibrated light path to enable the mounting base 3 to be placed on the surface of the optical platform, and enabling the calibration rod 2 to be located on the light path;

If the calibration in the horizontal direction and the vertical direction needs to be carried out simultaneously, the calibration process is as follows:

step I: selecting a calibration rod 2 with the same diameter according to the size of the light spot, and coaxially and fixedly connecting the calibration rod 2 with the mounting base 3;

step II: selecting two calibration points in a first section of an uncalibrated light path, and sequentially inserting a calibration tool into the optical platform fixing holes corresponding to the two calibration points so as to enable the mounting base 3 to be positioned on the upper surface of the optical platform;

When using the facula of different diameters to test, the calibration rod 2 that needs the change different diameters of adaptability carries out the light path and marks, can directly wholly change the calibration instrument this moment, also can be with calibration rod 2 and the fixed connection of 3 detachable of mount pad to only change calibration rod 2 can.

The fixing mode of the calibration rod 2 and the mounting seat 3 is not strictly required, for example, a fixing bolt (not shown) coaxial with the fixing rod 5 can be arranged on the upper surface of the mounting seat 3 along the vertical direction, a matching hole is axially arranged at the bottom of the calibration rod 2, the matching hole is provided with an internal thread in threaded matching with the fixing bolt, and the detachable connection of the calibration rod 2 and the mounting seat 3 is realized through the threaded matching of the matching hole and the fixing bolt; for the same reason, although the calibration rod 2 and the mounting base 3 are connected by the screw thread, the tightness of the screw thread connection does not affect the calibration precision in the vertical direction.

The technicians in the field can also arrange a polish rod (not shown) in the vertical direction on the mounting seat, the calibration rod 2 is directly inserted on the polish rod and is locked by a radial bolt, and the orientation of the scales can be conveniently adjusted by the fixing mode, so that the use is more convenient.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. An optical path calibration tool, characterized in that: the device comprises a fixing rod and a calibration rod which are coaxially arranged, wherein the diameter of the calibration rod is approximately the same as the diameter of a light spot to be calibrated, and the fixing rod can be in axial insertion fit with a fixing hole in the surface of an optical platform, so that the calibration rod is positioned on a light path to be calibrated and is placed above the optical platform.

2. The optical path calibration tool according to claim 1, wherein: the diameter of the calibration rod is larger than that of the fixing hole of the optical platform, and the fixing rod is in transition fit with the fixing hole.

3. An optical path calibration tool according to claim 2, characterized in that: the fixed rod is a cylinder with a uniform and smooth surface.

4. The optical path calibration tool according to claim 1, wherein: the calibration rod and the fixed rod are integrally formed.

5. The optical path calibration tool according to claim 1, wherein: the calibration rod is detachably and fixedly connected with the fixed rod.

6. An optical path calibration tool according to claim 5, wherein: the fixing rod is provided with external threads, the calibration rod is provided with an inwards-concave counter bore, the counter bore is provided with internal threads, and the fixing rod can be in threaded connection with the counter bore on the calibration rod.

7. The optical path calibration tool according to claim 1, wherein: the optical platform fixing device is characterized by further comprising a mounting seat arranged above the optical platform, the size of the mounting seat is larger than the diameter of a fixing hole of the optical platform, and the calibration rod and the fixing rod are respectively arranged on the upper side and the lower side of the mounting seat and are vertically connected with the mounting seat.

8. An optical path calibration tool according to claim 7, wherein: the calibration rod is detachably fixed on the mounting seat.

9. An optical path calibration tool according to claim 8, wherein: the upper surface of the mounting seat is fixed with a fixing bolt coaxial with the fixing rod along the vertical direction, the bottom of the calibration rod is provided with a matching hole along the axial direction, and the matching hole is provided with an internal thread matched with the fixing bolt in a threaded mode.

10. An optical path calibration tool according to any one of claims 1 to 9, wherein: the surface of the calibration rod is provided with scales.