CN112230440A - Cassegrain telescope assembling and adjusting mechanism and assembling and adjusting method - Google Patents
Cassegrain telescope assembling and adjusting mechanism and assembling and adjusting method Download PDFInfo
- Publication number
- CN112230440A CN112230440A CN202011050503.1A CN202011050503A CN112230440A CN 112230440 A CN112230440 A CN 112230440A CN 202011050503 A CN202011050503 A CN 202011050503A CN 112230440 A CN112230440 A CN 112230440A
- Authority
- CN
- China
- Prior art keywords
- optical axis
- laser
- mirror
- adjusting
- primary mirror
- 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.)
- Granted
Links
Images
Classifications
-
- 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
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
- G02B7/1822—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors comprising means for aligning the optical axis
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Telescopes (AREA)
Abstract
The invention discloses a Cassegrain telescope adjusting mechanism and an adjusting method, wherein the Cassegrain telescope adjusting mechanism comprises a laser for emitting light beams to a primary mirror of a Cassegrain telescope, a rotary mechanism for driving the laser to rotate around an optical axis of the primary mirror and a light receiving piece vertically arranged on the optical axis of the primary mirror, the optical axis of emergent light of the laser is parallel to the optical axis of the primary mirror, and the light receiving piece can move along the optical axis direction of the primary mirror; when adjusting cassegrain telescope, make the laser optical axis that laser emitter sent be on a parallel with the optical axis of primary mirror earlier, set up a set of light receiving piece in the back one end of primary mirror, rotatory laser instrument and removal light receiving piece, form the change of circular shape centre of a circle and diameter by a plurality of projection points on the light receiving piece under the different positions through comparing, adjust interval and inclination between primary mirror and the secondary mirror, reduce spherical aberration, coma and the influence of aberration such as out of focus, measuring equipment simple structure, need not to use the interferometer, and convenient operation.
Description
Technical Field
The invention relates to the field of optical imaging detection, in particular to a Cassegrain telescope adjusting mechanism and an adjusting method.
Background
The Cassegrain telescope is a reflection telescope consisting of two reflectors, the length of a lens barrel is greatly reduced by adopting the design of folding optics, wherein the larger reflector is called a primary mirror, the smaller reflector is called a secondary mirror, a paraboloid of the primary mirror is provided with a hole, the telescope is imaged behind the primary mirror, and the focus of the telescope is called a Cassegrain focus; the parabolic primary mirror reflects parallel light rays entering the telescope and converges the parallel light rays on a focus, the focus is also a focus of the secondary mirror, and then the secondary mirror reflects the light rays for imaging; the structure is described as a Cassegrain telescope in an ideal state, and in the actual installation and adjustment process, the optical axis of the primary mirror should be coaxial with the optical axis of the secondary mirror as much as possible so as to reduce the influence of spherical aberration, coma aberration, defocusing and other aberrations.
The application number 201910881002.9 discloses a method for assembling and adjusting a common-aperture optical system with a secondary mirror focusing mechanism, which comprises the steps of firstly measuring the deviation of a secondary mirror by using a central deviation measuring instrument, enabling the axis of a guide rail to be consistent with the rotating shaft of an instrument rotary table, then enabling the optical axis of the secondary mirror to be consistent with the axis of the guide rail by using a double-optical-path measuring method, building a light path by using a plane compensator in the process, performing auto-collimation and adjustment by using an interferometer, adjusting the integral assembly position of the secondary mirror focusing mechanism, enabling the wave aberration to meet the requirement of the wave aberration of the system at a zero position, using the interferometer, a spherical lens compensator, a plane tool reflector and other structures, and enabling the whole measuring process.
Disclosure of Invention
The invention aims to provide a Cassegrain telescope adjusting mechanism and method without using an interferometer.
A cassegrain telescope adjustment mechanism comprising:
the laser is used for emitting light beams to a primary mirror of the Cassegrain telescope, and the optical axis of the emitted light of the laser is parallel to the optical axis of the primary mirror;
the slewing mechanism is used for driving the laser to rotate around the optical axis of the main mirror;
the light receiving piece is vertically arranged on the optical axis of the main mirror and is connected with a guide mechanism so that the light receiving piece can move along the optical axis direction of the main mirror.
Furthermore, a displacement mechanism is arranged on the slewing mechanism, the moving direction of the displacement mechanism is perpendicular to the slewing axis of the slewing mechanism, and the laser is arranged on the displacement mechanism.
Further, the light receiving part is a CCD camera or a light screen.
Furthermore, the assembling and adjusting mechanism also comprises two groups of lens cone adjusting frames, two ends of a lens cone of the Cassegrain telescope respectively penetrate through the lens cone adjusting frames, and a plurality of second fasteners are in threaded connection with each group of lens cone adjusting frames; the plurality of second fastening pieces are uniformly arranged around the outer wall of the lens cone, and the end part of each group of second fastening pieces is abutted against the lens cone.
Further, the guide mechanism is a linear guide rail, and the light receiving element is arranged on a sliding block of the linear guide rail.
A Cassegrain telescope adjusting method comprises the following steps:
s1, before the secondary mirror is installed, the laser is adjusted to enable the optical axis of the primary mirror to be parallel to the optical axis of emergent light of the laser;
s2, after the secondary mirror is installed, rotating the laser by taking a straight line parallel to the optical axis of emergent light of the laser as an axis; the emergent light of the laser is reflected by the primary mirror and the secondary mirror in sequence and then emitted out, a plurality of projection points are formed on a light receiving piece vertical to the optical axis of the primary mirror, and a group of circles connected with the projection points in series are drawn;
s3, moving the light receiving piece along the axial direction of the emergent light of the laser for multiple times, and repeating the step S2 after each movement to draw multiple groups of circles;
s4, observing whether the diameters of the multiple groups of circles in the step S3 are equal, if not, adjusting the distance between the primary mirror and the secondary mirror, and repeating the step S2 and the step S3 until the diameters of the multiple groups of circles in the step S3 are equal; and observing whether the circle centers of the multiple groups of circles in the step S3 coincide, if not, adjusting the inclination angle of the secondary mirror and repeating the steps S2 and S3 until the circle centers of the multiple groups of circles coincide.
Preferably, the step S1 includes the following sub-steps:
s1.1, arranging a light receiving piece at the focus of the primary mirror, wherein emergent light of the laser forms a projection point on the light receiving piece after being reflected by the primary mirror;
s1.2, a virtual optical axis is simulated by the optical axis trend of the primary mirror, and the laser rotates around the virtual optical axis to form a plurality of dispersed projection points on the light receiving piece;
s1.3, adjusting parallelism and clearance between emergent light of the laser and the virtual optical axis until the dispersed projection points are gathered into a group of projection points in the process of rotating the laser, and observing whether the position of the group of projection points gathered by the dispersed projection points is changed;
if not, the optical axis of the primary mirror is parallel to the optical axis of emergent light of the laser;
if yes, adjusting the included angle between the emergent light of the laser and the virtual optical axis, keeping the adjusted included angle unchanged, and repeating the step S1.2 until the position of the projection point is not changed any more.
Preferably, in step S1, the laser outgoing light is reflected by the main mirror to form a projection point at the focus of the main mirror, and the microscope arranged at the focus of the main mirror is used to observe the before-focus and after-focus star point images of the projection point;
if there is aberration, the laser projection is adjusted to reduce or eliminate the aberration so that the star point observed in the microscope is the most rounded, and the optical axis of the primary mirror is parallel to the optical axis of the light emitted by the laser.
Preferably, in the step S5, the secondary mirror is deflected to improve parallelism between an optical axis of the secondary mirror and an optical axis of the primary mirror.
Preferably, in steps S1.2 and S1.3, the rotation angle of the laser is not less than degrees.
The invention has the beneficial effects that:
the Cassegrain telescope adjusting mechanism comprises a laser, a rotary mechanism and a light receiving piece, wherein the laser is used for emitting light beams to a primary mirror of the Cassegrain telescope; when the assembling and adjusting mechanism is used for assembling and adjusting the Cassegrain telescope, the optical axis of laser emitted by a laser emitter is parallel to the optical axis of the primary mirror, a group of light receiving pieces are arranged at one end of the back surface of the primary mirror by utilizing the reflection principle of the Cassegrain telescope, a laser is rotated and the light receiving pieces are moved, the distance and the inclination angle between the primary mirror and the secondary mirror are adjusted by comparing the change of the circle center and the diameter of a circle formed by a plurality of projection points on the light receiving pieces at different positions, the influence of the aberration such as spherical aberration, coma aberration, defocusing and the like is reduced, the measuring equipment has a simple structure, an interferometer is not needed, and the operation is convenient.
Drawings
FIG. 1 is a perspective view of a Cassegrain telescope adjustment mechanism of the present invention;
FIG. 2 is a schematic structural diagram of a swing mechanism according to the present invention;
FIG. 3 is a first lens barrel structure of the present invention;
FIG. 4 is a second schematic view of a lens barrel according to the present invention;
FIG. 5 is an optical path diagram of the Cassegrain telescope of the present invention in a state;
FIG. 6 is an optical path diagram of the Cassegrain telescope of the present invention in state two;
FIG. 7 is an optical path diagram of the Cassegrain telescope of the present invention in state three;
FIG. 8 is an optical path diagram of the Cassegrain telescope of the present invention in state four;
icon: 1-lens cone, 10-primary mirror, 11-secondary mirror, 110-secondary mirror fixing piece, 111-lens frame, 112-first fastening piece, 113-adjusting mechanism, 113 a-first threaded hole, 113 b-second threaded hole, 120-lens cone adjusting frame, 121-second fastening piece, 2-platform, 20-support, 21-rotating mechanism, 210-laser, 211-lever dial indicator, 212-displacement mechanism, 22-guiding mechanism, 220-sliding block and 221-light receiving piece.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
As shown in fig. 4, the cassegrain telescope includes a lens barrel 1, and a primary mirror 10 and a secondary mirror 11 provided in the lens barrel 1.
As shown in fig. 3, the secondary mirror 11 is mounted on a secondary mirror fixing member 110, the secondary mirror fixing member 110 is mounted on a mirror frame 111, and the mirror frame 111 is mounted on an end portion of the lens barrel 1; a plurality of first fasteners 112 are arranged on the wall of the lens barrel 1 around the outer circumferential surface of the lens frame 111, in this embodiment, 3 sets of the first fasteners 112 are provided, the three sets of the first fasteners 112 are in threaded connection with the lens barrel 1, and each set of the first fasteners 112 penetrates through the lens barrel 1 and is inserted into a blind hole on the outer circumferential surface of the lens frame 111, so that the coaxiality of the optical axis of the secondary mirror 11 and the optical axis of the primary mirror 10 can be adjusted by screwing/unscrewing the three sets of the first fasteners 112; the secondary mirror fixing piece 110 is connected with the mirror frame 111 through three groups of adjusting mechanisms 113, the three groups of adjusting mechanisms 113 are arranged around the axis of the secondary mirror fixing piece 110, each group of adjusting mechanisms 113 comprises a group of first threaded holes 113a and a group of second threaded holes 113b, the first threaded holes 113a penetrate through the mirror frame 111, the second threaded holes 113b penetrate through the mirror frame 111 and the secondary mirror fixing piece 110 simultaneously, the second threaded holes 113b can be fixedly connected with the mirror frame 111 and the secondary mirror fixing piece 110 through a group of screws, one group of screws in the first threaded holes 113a can prop open the secondary mirror fixing piece 110 in the screwing process, and the mounting angle of the secondary mirror 11, namely the included angle between the optical axis of the secondary mirror 11 and the axis of the lens barrel 1 can be adjusted by adjusting the screws in the three groups of adjusting mechanisms 113, so that the inclination direction and the inclination angle between the mirror surface of the secondary mirror.
As shown in fig. 5, as a knowledge of optical theory, when the optical axis of the primary mirror 10 is coaxial with the optical axis of the secondary mirror 11 and the focal point of the primary mirror 10 is confocal with the focal point of the secondary mirror 11 (this is the state one of the cassegrain telescope of the present invention), the incident light is projected onto the primary mirror 10 and reflected by the primary mirror 10 and the secondary mirror 11 in sequence to form a set of parallel lights which are emitted along the through hole at the center of the primary mirror 10 and projected onto the light receiving element, and the light receiving element is moved back and forth along the optical axis direction of the primary mirror 10, and the size of the aperture formed on the light receiving element at the right side is not changed.
As shown in fig. 6, when there is an inclination between the optical axis of the primary mirror 10 and the optical axis of the secondary mirror 11 (this is the second state of the cassegrain telescope of the present invention), there is also an included angle between the outgoing light and the incoming light, and the position of the outgoing light forming the projection point on the light receiving element changes by rotating the incident light angle or moving the light receiving element along the optical axis direction of the primary mirror.
As shown in fig. 7 and 8, when the optical axis of the primary mirror 10 is coaxial with the optical axis of the secondary mirror 11, but the focal point of the primary mirror 10 is not confocal with the focal point of the secondary mirror 11, the emergent light forms a projection point in a convergent or divergent state on the light receiving member; when the focal point of the secondary mirror 11 is located between the focal points of the primary mirror 10 and the primary mirror 10 (this is the state three of the cassegrain telescope of the present invention), the state diagram is shown in fig. 7, and when the focal point of the secondary mirror 11 is located outside the focal point of the primary mirror 10 (this is the state four of the cassegrain telescope of the present invention), the state diagram is shown in fig. 8.
The first embodiment is as follows:
as shown in fig. 1 to 4, the present embodiment provides a cassegrain telescope adjusting mechanism, which includes a laser 210 for emitting a light beam to a primary mirror 10 of a cassegrain telescope, a revolving mechanism 21 for driving the laser 210 to rotate around an optical axis of the primary mirror 10, and a light receiving member 221 vertically arranged on the optical axis of the primary mirror 10, wherein the optical axis of the emitted light of the laser 210 is parallel to the optical axis of the primary mirror 10; the light receiving element 221 is connected to a guide mechanism 22 so that the light receiving element 221 can move in the optical axis direction of the main mirror 10.
As shown in fig. 1 and 2, in order to make the optical axis of the emergent light of the laser 210 parallel to the optical axis of the primary mirror 10, a platform 2 is first provided, the lens barrel 1 of the cassegrain telescope is supported on the platform 2, the primary mirror 10 is installed in the lens barrel 1, two groups of lens barrel adjusting frames 120 are vertically provided on the platform 2, two ends of the lens barrel 1 of the cassegrain telescope respectively penetrate through one group of the lens barrel adjusting frames 120, each group of the lens barrel adjusting frames 120 is connected with a plurality of second fasteners 121 through threads, in this embodiment, each group of the lens barrel adjusting frames 120 is provided with three groups of the second fasteners 121, the three groups of the second fasteners 121 are uniformly arranged around the outer wall of the lens barrel 1, and the end of each group of the second fasteners 121 abuts against the lens barrel 1.
Be located and be equipped with support 20 on the platform 2 of installation secondary mirror 11 one side on lens cone 1, be equipped with rotation mechanism 21 on the support 20, and rotation mechanism 21's pivot is on a parallel with platform 2 place plane, as shown in fig. 3, be equipped with displacement mechanism 212 on rotation mechanism 21, just displacement mechanism 212 moving direction perpendicular to rotation axis of rotation mechanism 21, laser instrument 210 is located on displacement mechanism 212, in this embodiment displacement mechanism 212 adopts the unipolar displacement platform, promptly laser instrument 210 can wind rotation of rotation mechanism 21's axis is at vertical in-plane rotation, and the interval between the axis of laser instrument 210 and rotation mechanism 21 is adjustable.
The guide mechanism 21 is a linear guide rail, and the light receiving member 221 is disposed on the slider 220 of the linear guide rail.
The support 20 is further provided with a lever dial indicator 211, the lever dial indicator 211 is attached to the end of the lens barrel 1, and the value of the lever dial indicator 211 can be observed to assist in adjusting the lens barrel 1, so that the central axis of the lens barrel 1 is parallel to the axis of the swing mechanism 21.
Example two:
when the cassegrain telescope is adjusted, firstly, the optical axis of the emergent light emitted by the laser 210 needs to be parallel to the optical axis of the primary mirror 10, that is, the first step of the adjusting method is as follows:
s1, before mounting the secondary mirror 11, the laser 210 is adjusted so that the optical axis of the primary mirror 10 is parallel to the optical axis of the outgoing light from the laser 210.
For the purpose of step S1, in this embodiment, the step S1 includes the following sub-steps:
s1.1, arranging a light receiving part at the focus of the main mirror 10, wherein the light receiving part can be a light receiving part 221 mentioned below or can be arranged independently, the light receiving part 221 can be a CCD camera or a light screen, the CCD camera is adopted in the implementation, and the emergent light of the laser 210 forms a projection point on the light receiving part at the focus after being reflected by the main mirror 10;
s1.2, because the optical axis of the main mirror 10 can not be determined at present, but a virtual optical axis can be simulated according to the trend of the optical axis of the main mirror 10, in this embodiment, because three groups of second fasteners 121 on the two groups of lens barrel adjusting frames 120 are adjusted, the axis of the lens barrel 1 is kept parallel to the plane of the platform 2, and therefore the virtual optical axis can refer to the axis of the rotating mechanism 21; the laser 210 rotates a certain angle around the axis of the rotating mechanism 21, so that a plurality of dispersed projection points are formed on the light receiving member;
s1.3, adjusting the parallelism and the gap between emergent light of the laser 210 and the virtual optical axis; as shown in fig. 3, the fixing manner of the laser 210 is similar to that of the lens barrel 1, two ends of the laser 210 are sleeved on the laser brackets, three sets of fasteners are arranged around each set of laser brackets, and the direction of the optical axis of the emergent light of the laser 210 can be adjusted by screwing/unscrewing the fasteners on any laser bracket; adjusting the laser 210 or the lens barrel 1 until the plurality of dispersed projection points are gathered into a group of projection points in the process of rotating the laser 210, and observing whether the position of the group of projection points gathered by the plurality of dispersed projection points is changed;
if not, that is, no matter how the laser 210 is rotated, the position of the projection point does not change, the optical axis of the primary mirror 10 is parallel to the optical axis of the light emitted from the laser 210.
If the position of the projection point changes, the angle between the emergent light of the laser 210 and the virtual optical axis is adjusted by screwing/unscrewing the fastener on the laser support, the adjusted angle is kept unchanged, and the step S1.2 is repeated until the position of the projection point does not change.
Further, preferably, in steps S1.2 and S1.3, the rotation angle of the laser 210 is not less than 360 degrees.
In another embodiment, in step S1, after the outgoing light of the laser 210 is reflected by the primary mirror 10, a projection point is formed at the focal point of the primary mirror 10, a microscope disposed at the focal point of the primary mirror 10 can be used to observe whether there is a phase difference between the before-focus star point image and the after-focus star point image of the projection point, if there is an aberration, the fastening member on any laser holder is screwed/unscrewed to adjust the projection direction of the laser 210, so as to reduce or eliminate the aberration, and make the star point observed in the microscope be the most rounded, and the optical axis of the primary mirror 10 is parallel to the optical axis of the outgoing light of the laser 210, which can be used as an alternative to step S1.1 to step S1.3.
After step S1 is completed, the optical axis of the primary mirror 10 is parallel to the optical axis of the outgoing light of the laser 210, and the following steps are required:
s2, after the secondary mirror 11 is installed, rotating the laser 210 with a straight line parallel to the optical axis of the light emitted from the laser 210 as the axis (therefore, after the optical axis of the primary mirror 10 is adjusted on the revolving mechanism 21, the optical axis of the light emitted from the laser 210 is already parallel to the optical axis of the light emitted from the laser 210, at this time, the optical axis of the light emitted from the laser 210 is parallel to the axis of the revolving mechanism, and the laser 210 can be rotated around the axis of the revolving mechanism 21); the emergent light of the laser 210 is reflected by the primary mirror 10 and the secondary mirror 11 in sequence and then emitted out, and a plurality of projection points are formed on a light receiving element 221 vertical to the optical axis of the primary mirror 10; for example, each time the laser is rotated by an angle of 60 degrees, 6 projection points can be formed on the light receiving element 221 after one rotation, the 6 projection points are marked, and a group of circles connected in series with the 6 projection points is drawn;
s3, moving the light receiving element 221 on the linear guide many times along the axial direction of the outgoing light of the laser 210, and repeating step S2 after each movement to draw a plurality of sets of circles, i.e., drawing a plurality of sets of circles containing the 6 projection points on the light receiving element 221.
S4, observing whether the diameters of the multiple groups of circles in the step S3 are equal, if not, the primary mirror 10 and the focal point of the secondary mirror 11 are not confocal, adjusting the distance between the primary mirror 10 and the secondary mirror 11, and repeating the step S2 and the step S3 until the diameters of the multiple groups of circles in the step S3 are equal, wherein the focal points of the primary mirror 10 and the secondary mirror 11 are confocal.
S5, observing whether the circle center positions of the multiple groups of circles in the step S3 coincide, if not, the optical axis of the primary mirror 10 is not coaxial with the optical axis of the secondary mirror 11, adjusting the inclination angle of the secondary mirror 11, improving the parallelism between the optical axis of the secondary mirror 11 and the optical axis of the primary mirror 10, repeating the step S2 and the step S3 until the circle centers of the multiple groups of circles coincide, at the moment, the optical axis of the primary mirror 10 is coaxial with the optical axis of the secondary mirror 11 and confocal, and the state is shown in FIG. 5.
In some embodiments, the above steps S4 and S5 can be switched to order, i.e. the primary mirror 10 and the secondary mirror 11 are coaxial, and then the focus of the primary mirror 10 and the focus of the secondary mirror 11 are confocal.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a cassegrain telescope adjusting mechanism which characterized in that includes:
a laser (210) for emitting a beam to the primary mirror (10) of the Cassegrain telescope, the optical axis of the emitted beam of the laser (210) being parallel to the optical axis of the primary mirror (10);
a turning mechanism (21) for driving the laser (210) to rotate around the optical axis of the main mirror (10);
and a light receiving member (221) vertically disposed on the optical axis of the main mirror (10), the light receiving member (221) being connected to a guide mechanism (22) so that the light receiving member (221) can move in the direction of the optical axis of the main mirror (10).
2. The cassegrain telescope adjustment mechanism of claim 1, wherein: the laser device is characterized in that a displacement mechanism (212) is arranged on the swing mechanism (21), the moving direction of the displacement mechanism (212) is perpendicular to the swing axis of the swing mechanism (21), and the laser device (210) is arranged on the displacement mechanism (212).
3. The cassegrain telescope adjustment mechanism according to claim 1 or 2, characterized in that: the light receiving part (221) is a CCD camera or a light screen.
4. The cassegrain telescope adjustment mechanism according to claim 1 or 2, characterized in that: the assembling and adjusting mechanism further comprises two groups of lens cone adjusting frames (120), two ends of a lens cone (1) of the Cassegrain telescope are respectively arranged in the lens cone adjusting frames (120) in a penetrating mode, and a plurality of second fastening pieces (121) are connected to each group of lens cone adjusting frames (120) in a threaded mode; the plurality of second fastening pieces (121) are uniformly arranged around the outer wall of the lens cone (1), and the end part of each group of second fastening pieces (121) is abutted to the lens cone (1).
5. The cassegrain telescope adjustment mechanism according to claim 1 or 2, characterized in that: the guide mechanism (21) is a linear guide rail, and the light receiving piece (221) is arranged on a sliding block (220) of the linear guide rail.
6. A method of adjusting a cassegrain telescope adjustment mechanism according to claim 1, comprising the steps of:
s1, before the secondary mirror (11) is installed, the laser (210) is adjusted to enable the optical axis of the primary mirror (10) to be parallel to the optical axis of emergent light of the laser (210);
s2, after the secondary mirror (11) is installed, rotating the laser (210) by taking a straight line parallel to the optical axis of the emergent light of the laser (210) as an axis; the emergent light of the laser (210) is reflected by the primary mirror (10) and the secondary mirror (11) in sequence and then emitted out, a plurality of projection points are formed on a light receiving piece (221) vertical to the optical axis of the primary mirror (10), and a group of circles connected with the projection points in series are drawn;
s3, moving the light receiving piece (221) along the axial direction of the emergent light of the laser (210) for a plurality of times, and repeating the step S2 after each movement to draw a plurality of groups of circles;
s4, observing whether the diameters of the multiple groups of circles in the step S3 are equal, if not, adjusting the distance between the primary mirror (10) and the secondary mirror (11), and repeating the step S2 and the step S3 until the diameters of the multiple groups of circles in the step S3 are equal; and (5) observing whether the circle centers of the multiple groups of circles in the step S3 coincide, if not, adjusting the inclination angle of the secondary mirror (11) and repeating the step S2 and the step S3 until the circle centers of the multiple groups of circles coincide.
7. The method of claim 6, wherein the step of adjusting the cassegrain telescope adjustment mechanism comprises: the step S1 includes the following sub-steps:
s1.1, arranging a light receiving piece at the focus of a main mirror (10), and forming a projection point on the light receiving piece after the emergent light of a laser (210) is reflected by the main mirror (10);
s1.2, a virtual optical axis is simulated by the optical axis trend of the main mirror (10), and the laser (210) rotates around the virtual optical axis to form a plurality of dispersed projection points on the light receiving piece;
s1.3, adjusting the parallelism and the gap between emergent light of the laser (210) and the virtual optical axis until the plurality of dispersed projection points are gathered into a group of projection points in the process of rotating the laser (210), and observing whether the position of the group of projection points gathered by the plurality of dispersed projection points changes;
if not, the optical axis of the primary mirror (10) is parallel to the optical axis of the light emitted by the laser (210);
if yes, adjusting the included angle between the emergent light of the laser (210) and the virtual optical axis, keeping the adjusted included angle unchanged, and repeating the step S1.2 until the position of the projection point is not changed any more.
8. The method of claim 6, wherein the step of adjusting the cassegrain telescope adjustment mechanism comprises: in the step S1, after the emergent light of the laser (210) is reflected by the main mirror (10), a projection point is formed at the focus of the main mirror (10), and the starpoint images before and after the projection point are observed by using a microscope arranged at the focus of the main mirror (10);
if aberrations are present, the laser (210) projection is adjusted to reduce or eliminate the aberrations so that the star point observed in the microscope is the most rounded, and the optical axis of the primary mirror (10) is parallel to the optical axis of the light exiting the laser (210).
9. The method of claim 6, wherein the step of adjusting the cassegrain telescope adjustment mechanism comprises: in the step S5, the secondary mirror (11) is deflected to improve the parallelism between the optical axis of the secondary mirror (11) and the optical axis of the primary mirror (10).
10. The method of claim 7, wherein the step of adjusting the cassegrain telescope adjustment mechanism comprises: in the steps S1.2 and S1.3, the rotation angle of the laser (210) is not less than 360 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011050503.1A CN112230440B (en) | 2020-09-29 | 2020-09-29 | Cassegrain telescope assembling and adjusting mechanism and assembling and adjusting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011050503.1A CN112230440B (en) | 2020-09-29 | 2020-09-29 | Cassegrain telescope assembling and adjusting mechanism and assembling and adjusting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112230440A true CN112230440A (en) | 2021-01-15 |
| CN112230440B CN112230440B (en) | 2021-12-28 |
Family
ID=74120560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011050503.1A Active CN112230440B (en) | 2020-09-29 | 2020-09-29 | Cassegrain telescope assembling and adjusting mechanism and assembling and adjusting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112230440B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112882186A (en) * | 2021-01-22 | 2021-06-01 | 西安应用光学研究所 | Welding fixing structure and fixing method suitable for adjustable reflector group |
| CN115308918A (en) * | 2022-09-29 | 2022-11-08 | 中国科学院长春光学精密机械与物理研究所 | Machine body device of large-caliber coaxial collimator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5282016A (en) * | 1992-07-29 | 1994-01-25 | Hughes Aircraft Company | Optical alignment by use of arrays of reflective or diffractive optical elements and detectors |
| CN101241190A (en) * | 2007-04-25 | 2008-08-13 | 中国科学院安徽光学精密机械研究所 | Zernike modal based laser atmospheric turbulence intensity profile measuring systems and method |
| CN104635760A (en) * | 2015-01-08 | 2015-05-20 | 中国科学院合肥物质科学研究院 | High-precision automatic regulating system for digital atmosphere fine-particle laser radar |
| CN106772922A (en) * | 2017-01-26 | 2017-05-31 | 西安应用光学研究所 | The portable heavy caliber of multiple spectra inlays speculum school axle instrument |
| CN107176311A (en) * | 2017-07-06 | 2017-09-19 | 中国科学院上海技术物理研究所 | A kind of adaptive laser racemization system for space junk |
-
2020
- 2020-09-29 CN CN202011050503.1A patent/CN112230440B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5282016A (en) * | 1992-07-29 | 1994-01-25 | Hughes Aircraft Company | Optical alignment by use of arrays of reflective or diffractive optical elements and detectors |
| CN101241190A (en) * | 2007-04-25 | 2008-08-13 | 中国科学院安徽光学精密机械研究所 | Zernike modal based laser atmospheric turbulence intensity profile measuring systems and method |
| CN104635760A (en) * | 2015-01-08 | 2015-05-20 | 中国科学院合肥物质科学研究院 | High-precision automatic regulating system for digital atmosphere fine-particle laser radar |
| CN106772922A (en) * | 2017-01-26 | 2017-05-31 | 西安应用光学研究所 | The portable heavy caliber of multiple spectra inlays speculum school axle instrument |
| CN107176311A (en) * | 2017-07-06 | 2017-09-19 | 中国科学院上海技术物理研究所 | A kind of adaptive laser racemization system for space junk |
Non-Patent Citations (1)
| Title |
|---|
| 何业文、吕伟忠: "《中3 0 毫米卡塞格林望远镜的装调》", 《现代科学仪器》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112882186A (en) * | 2021-01-22 | 2021-06-01 | 西安应用光学研究所 | Welding fixing structure and fixing method suitable for adjustable reflector group |
| CN112882186B (en) * | 2021-01-22 | 2023-03-03 | 西安应用光学研究所 | Welding fixing structure and fixing method suitable for adjustable reflector group |
| CN115308918A (en) * | 2022-09-29 | 2022-11-08 | 中国科学院长春光学精密机械与物理研究所 | Machine body device of large-caliber coaxial collimator |
| CN115308918B (en) * | 2022-09-29 | 2023-01-03 | 中国科学院长春光学精密机械与物理研究所 | Machine body device of large-caliber coaxial collimator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112230440B (en) | 2021-12-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112230440B (en) | Cassegrain telescope assembling and adjusting mechanism and assembling and adjusting method | |
| CN104541194B (en) | Optical devices and microscope | |
| CN114415389B (en) | Optical-mechanical system adjustment method comprising multiple reflectors | |
| US3469902A (en) | Catoptric light collector | |
| CN104330241A (en) | Universal digital projection/or reproduction fish-eye lens detection system | |
| US20110141594A1 (en) | Reflective objective | |
| JP2002328302A (en) | Optical system | |
| JPWO2016199262A1 (en) | Cassegrain mirror holding mechanism, microscope equipped with the same, and mounting method of cassegrain mirror | |
| JPH0917024A (en) | Method and apparatus for alignment of objective lens | |
| US4059336A (en) | Microscope and magnification changer | |
| US6512868B1 (en) | Precision fiber optic collimator | |
| JP3974976B2 (en) | Stereo microscope with lens barrel | |
| KR101536684B1 (en) | Aligning System for Large Optical Apparatus | |
| JP2004021259A (en) | Optical device for obtaining information on sample or object to be observed | |
| CN106443945B (en) | A kind of zoom cylinder mirror and optical imaging system | |
| KR101749818B1 (en) | Experiment device of reflecting telescope | |
| EP2933671B1 (en) | Robust support structure for an optical mirror telescope | |
| CN110376700B (en) | Light path adjusting mechanism based on digital micromirror unit and adjusting method thereof | |
| CN210222333U (en) | Light path adjusting mechanism based on digital micromirror unit | |
| CN104965391B (en) | A kind of coherence factor adjusting apparatus in lithography illuminating system | |
| JPH05228673A (en) | Laser beam machine | |
| JP3174318B2 (en) | Lens eccentricity measuring device | |
| JP2512876B2 (en) | Illumination optics for stereo microscopes | |
| CN214122551U (en) | Double-view-field scanning infrared optical system | |
| CN113805329A (en) | Method for debugging beam directivity of zoom beam expander |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |