CN112099222B - Flat field lens assembly focusing device for telescope - Google Patents
Flat field lens assembly focusing device for telescope Download PDFInfo
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- CN112099222B CN112099222B CN202010996433.2A CN202010996433A CN112099222B CN 112099222 B CN112099222 B CN 112099222B CN 202010996433 A CN202010996433 A CN 202010996433A CN 112099222 B CN112099222 B CN 112099222B
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- positioning
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- focusing
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
- G02B23/06—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors having a focussing action, e.g. parabolic mirror
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight
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- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Telescopes (AREA)
Abstract
The invention discloses a focusing device of a plano mirror assembly for a telescope, which comprises a circular casing and a rotary shell screwed in the circular casing, wherein the rotary shell is matched with the circular casing through threads, a positioning hole is formed in the end face of the rotary shell, a positioning track groove corresponding to the positioning hole is formed in the end face of the circular casing, a pin shaft matched with the positioning hole is installed on a focusing ring, the focusing ring is installed on the circular casing through the pin shaft, and a switching shell is arranged on the circular casing. According to the invention, the rotary shell for mounting the field lens and the circular sleeve shell for mounting the telescope end are in threaded connection, the rotary shell is driven to move in the circular sleeve shell through the rotary focusing ring, the linear distance between the field lens and the camera and the telescope can be adjusted after the installation is finished, and the error of focal length adjustment is reduced, so that a better shooting effect can be obtained.
Description
Technical Field
The invention belongs to the technical field of telescope equipment, and particularly relates to a focusing device of a flat field mirror assembly for a telescope.
Background
People often use a camera to shoot images from a telescope for recording, ideally, when the camera images a uniform target (such as a starless background), the gray values of all pixel points in the obtained images should be theoretically the same (that is, the gray values of shot photos are the same).
The conventional flat field mirror assembly can cause corresponding errors when in use, such as errors in processing, mechanical errors and the like, and actual differences are fine numerical values during flat field correction, so that the errors are reduced to be quite important for improving the quality of images.
Disclosure of Invention
The invention aims to provide a focusing device of a field lens assembly for a telescope.
In order to achieve the purpose, the invention adopts the following technical scheme:
a focusing device of a flat field lens assembly for a telescope comprises,
one end of the circular casing is used for installing the telescope, and the other end of the circular casing is used for installing the camera;
the outer wall of the rotary shell is spirally connected with the inner wall of the circular casing;
the positioning holes are formed in the end face, close to the camera, of the rotary shell, and at least one positioning hole is formed in the positioning hole;
the positioning rail groove is formed in the end face, close to the positioning hole, of the circular casing, and is used for positioning when the rotary casing rotates;
one end of the connecting piece penetrates through the positioning track groove to be inserted into the positioning hole, the other end of the connecting piece is fixed on the focusing ring, and the focusing ring is located between the circular casing and the telescope.
A rotatory casing for installing the flat field lens and be used for installing threaded connection between the circular cover shell of telescope end, the connecting piece inserts the installation in the locating hole, can drive rotatory casing through rotatory focusing ring and carry out screw motion in circular cover shell, and the lens of installation just takes place at the ascending rectilinear motion of axial for camera and telescope to adjust the linear distance between the three, thereby reduce the error and reach the best focus of shooting effect.
According to a further improvement scheme of the invention, when the connecting piece is inserted into the positioning hole, the end face of the focusing ring is in contact fit with the circular sleeve.
In a further improvement of the present invention, the positioning rail groove is an annular groove, and when the rotating housing is mounted in the circular casing, the positioning hole corresponds to the positioning rail groove.
The invention has the further improvement scheme that the number of the positioning holes is two, the positioning track grooves are closed annular arcs and correspond to the number of the positioning holes, and the two positioning track grooves are symmetrically arranged around the axis and respectively correspond to the two positioning holes.
In a further improvement of the present invention, the positioning holes simultaneously slide from one end to the other end of the corresponding positioning rail groove when the rotary housing is screwed from the start end to the end inside the circular casing.
The invention has the further improvement scheme that the end surface of the circular casing is annular, the positioning track groove is arranged between the inner ring and the outer ring of the circular casing, the inner ring is provided with an annular bulge along the axial direction, and the inner wall of the focusing ring is in clearance fit with the outer wall of the annular bulge.
According to a further improvement scheme of the invention, steel balls are arranged on the inner wall of the focusing ring at intervals, a groove is formed in the outer wall of the annular protrusion, and when the focusing ring is in clearance fit with the outer wall of the annular protrusion, the steel balls are in contact fit with the groove.
According to a further improvement scheme of the invention, the outer wall of one end, far away from the focusing ring, of the circular casing is connected with a switching shell through a screw, an annular end cover is arranged on the switching shell, and when the rotating shell rotates from an initial section to a terminal end, threads of the rotating shell are in contact fit with the annular end cover.
The invention has the further improvement scheme that the part of the outer wall of the annular bulge, which exceeds the focusing ring, is provided with an external thread for mounting a telescope.
In a further improvement of the invention, scales are engraved on the periphery of the circular casing, and the positions of the minimum value and the maximum value of the scales respectively correspond to the two ends of the positioning track groove.
Compared with the prior art, the invention has the following beneficial effects:
(1) A rotatory casing for installing the field flattener lens and be used for installing threaded connection between the circular cover shell of telescope end, the connecting piece inserts the installation in the locating hole, can drive rotatory casing through rotatory focusing circle and carry out screw motion in circular cover shell, and the lens of installation just takes place at the ascending rectilinear motion of axial for camera and telescope, with the linear distance between the adjustment three, thereby reduce the error of adjustment focus and reach the best focus of shooting effect.
(2) When the connecting piece is inserted into the positioning hole, the end face of the focusing ring is contacted with the circular casing, so that the focusing ring is more attractive and is not easy to slip.
(3) The positioning track groove corresponding to the positioning hole is an annular arc, the maximum central angle of the positioning hole which can rotate is limited, and the distance adjustment between the lens and the camera and the telescope can be determined.
(4) The regulation circle further contacts the cooperation with annular bulge for the installation of regulation circle is more stable, also is difficult for taking place radial ascending slip during the use.
(5) The setting of steel ball makes the slip between regulation circle and the annular bulge more smooth.
(6) When the adapter shell is installed, the annular end cover can limit one end, far away from the focusing ring, of the rotary shell, and the rotary shell is placed to rotate excessively to fall off.
(7) The scale marks are arranged, so that a clear concept of quantization can be realized during focusing.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention
FIG. 2 is a schematic view of a lens structure without field lens
FIG. 3 is a schematic top view of a focusing ring according to an embodiment of the present invention
FIG. 4 is a schematic structural view of the steel ball shown in FIG. 3 of the present invention
FIG. 5 is a schematic diagram of the top view of the positioning holes and the initial positions of the positioning rail slots according to the present embodiment
FIG. 6 is a front view of the focusing ring of FIG. 3
In the figure: 1-a circular housing; 2-rotating the housing; 3-positioning holes; 4-positioning the track groove; 5-a pin shaft; 6-a focusing ring; 7-a groove; 8-bulge; 9-steel balls; 10-a field flattener gasket; 11-a flat field mirror pressing ring; 12-lens cover.
Detailed Description
The present invention is further illustrated by the following detailed description in conjunction with the accompanying drawings, it being understood that the following detailed description is illustrative of the invention only and is not intended to limit the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which will occur to those skilled in the art upon reading the present specification.
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example (b):
a focusing device of a flat field lens assembly for a telescope comprises,
the telescope-mounted camera comprises a circular casing 1, wherein one end of the circular casing 1 is used for mounting a telescope, and the other end of the circular casing 1 is used for mounting a camera;
the outer wall of the rotary shell 2 is spirally connected with the inner wall of the circular casing 1;
in this scheme, the lens that rotatory casing 2 internal fixation has three interval to set up, be equipped with flat field lens packing ring 10 between the lens, be close to the camera the lens with still install flat field lens clamping ring 11 between the 2 tip of rotatory casing.
The positioning holes 3 are formed in the end face, close to the camera, of the rotating shell 2, and at least one positioning hole 3 is formed in the rotating shell 3;
the positioning track groove 4 is formed in the end face, close to the positioning hole 3, of the circular casing 1, and the positioning track groove 4 is used for positioning the rotary shell 2 during rotation;
one end of the connecting piece penetrates through the positioning track groove 4 and is inserted into the positioning hole 3, the other end of the connecting piece is fixed on the focusing ring 6, and the focusing ring 6 is located between the circular casing 1 and the telescope. The connecting piece is a pin shaft 5.
In the scheme, the focusing ring 6 and the circumferential side of the circular casing 1 are provided with spaced anti-slip stripes along the axial direction, so that the friction force when the hand rotates the rotating part is effectively increased.
When the connecting piece is inserted into the positioning hole 3, the end surface of the focusing ring 6 is in contact fit with the circular casing 1.
The locating hole 3 has two, the locating track groove 4 be closed, use circular cover shell 1's axle center be circular shape annular arc and with 3 quantity of locating hole correspond, two locating track grooves 4 set up with the axle center symmetry, work as rotatory casing 2 is installed when in circular cover shell 1, two locating hole 3 corresponds with two respectively locating track groove 4 position.
When the rotary case 2 is screwed from the start end to the end in the circular casing 1, the positioning holes 3 are simultaneously slid from one end to the other end of the corresponding positioning rail groove 4.
In this scheme, 1 inner wall of circular cover shell is equipped with the internal thread, be equipped with on the 2 outer walls of rotatory casing with the bull thread that the internal thread of circular cover shell 1 matches, the setting up of bull thread makes short time internal rotation speed very fast.
The end face of the circular casing 1 is annular, the positioning track groove 4 is formed between the inner ring and the outer ring of the circular casing 1, the inner ring is provided with an annular protrusion 8 along the axial direction, and the inner wall of the focusing ring 6 is in clearance fit with the outer wall of the annular protrusion 8. The outer wall of the annular bulge 8 exceeds the focusing ring 6, and is provided with an external thread for mounting a telescope.
In the scheme, a through hole is formed in the inner wall of the focusing ring 6 and penetrates through the focusing ring, the through hole is in a radial strip shape, a fastener is installed in the through hole, the fastener is installed in the through hole, and the steel ball 9 is in sliding fit with the fastener.
The circular casing 1 is kept away from the one end outer wall of focusing ring 6 has the switching casing through threaded connection, be equipped with annular end cover on the switching casing, work as rotatory casing 2 is rotatory when terminating the end from the initial segment, the screw thread of rotatory casing 2 with annular end cover contact cooperation.
The periphery of the circular casing 1 is marked with scales, and the positions of the minimum value and the maximum value of the scales respectively correspond to the two ends of the positioning track groove 4. According to data in practical application, the error of secondary adjustment is usually about 1-2mm, in the scheme, the scale value is set to be 0-5mm, namely when the positioning hole 3 is driven to rotate from one end of the positioning track groove 4 to the other end through the rotation of the focusing ring 6, the alignment line on the focusing ring 6 also rotates from the scale 0 to the scale 5.
In this scheme, rotary housing 2 with the contact surface of circular cover shell 1 scribbles the lubricant, lubricant adopts damping grease, scribbles the friction that lubricant can further reduce when rotating, when reducing the noise that the friction produced, rotates more in the same time smoothly.
In this embodiment, when the device is not in use, the two ends, i.e. the adapter housing and the annular protrusion 8, are both connected with the lens cap 12 by screw threads.
The specific use mode is as follows: the lens cap 12 of the device is taken down, the end of the annular bulge 8 is screwed to the telescope, the camera is screwed to the switching shell, the alignment line on the focusing ring 6 is aligned with the scale value 0 on the circular casing 1 in the initial state, the rotating shell 2 is screwed to the state close to the telescope and far away from the camera, the adjusting ring is rotated according to the image presented in the camera, the pin 5 clamped in the positioning hole 3 is driven by the adjusting ring to rotate along the positioning track groove 4, the alignment line also rotates from 0 to 5, the field flattener in the rotating shell 2 moves from the telescope to the direction of the camera, the linear distance of the field flattener changes, and the focusing ring 6 is rotated to be properly stopped at the focal length.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A focusing apparatus for a plano-field mirror assembly for a telescope, the focusing apparatus comprising: comprises the steps of (a) preparing a substrate,
one end of the circular casing (1) is used for installing a telescope, and the other end of the circular casing (1) is used for installing a camera;
the rotary shell (2) is used for mounting a field flattener lens, and the outer wall of the rotary shell (2) is spirally connected with the inner wall of the circular casing (1);
the positioning hole (3), the positioning hole (3) is arranged on the end face, close to the camera, of the rotary shell (2);
the positioning track groove (4) is formed in the end face, close to the positioning hole (3), of the circular casing (1) and used for positioning the rotary shell (2) during rotation;
one end of the connecting piece penetrates through the positioning track groove (4) and is inserted into the positioning hole (3), the other end of the connecting piece is fixed on the focusing ring (6), the focusing ring (6) is positioned between the circular casing (1) and the telescope, when the connecting piece is inserted into the positioning hole (3), the end surface of the focusing ring (6) is in contact fit with the circular casing (1), the positioning track groove (4) is an annular groove, when the rotary housing (2) is mounted inside the circular casing (1), the positioning hole (3) corresponds to the positioning track groove (4), the number of the positioning holes (3) is two, the positioning track grooves (4) are closed annular arcs and correspond to the number of the positioning holes (3), the two positioning rail grooves (4) are symmetrically arranged around the axis and respectively correspond to the two positioning holes (3), when the rotary housing (2) is screwed from a start end to a termination end inside the circular casing (1), the positioning holes (3) simultaneously slide from one end to the other end of the corresponding positioning track groove (4), the end surface of the circular casing (1) is annular, the positioning track groove (4) is arranged between the inner ring and the outer ring of the circular casing (1), the inner ring is provided with an annular bulge (8) along the axial direction, and the inner wall of the focusing ring (6) is in clearance fit with the outer wall of the annular bulge (8).
2. The apparatus of claim 1, wherein the focusing means comprises: steel balls are installed on the inner wall of the coke adjusting ring (6) at intervals, a groove (7) is formed in the outer wall of the annular protrusion (8), and when the coke adjusting ring (6) is in clearance fit with the outer wall of the annular protrusion (8), the steel balls are in contact fit with the groove (7).
3. A focusing apparatus for a piano mirror assembly of claim 1, wherein: circular cover shell (1) is kept away from the one end outer wall of focusing circle (6) has the switching casing through threaded connection, be equipped with annular end cover on the switching casing, work as rotatory casing (2) are rotatory to the termination end from the initial segment when, the screw thread of rotatory casing (2) with annular end cover contact cooperation.
4. The apparatus of claim 1, wherein the focusing means comprises: and the part of the outer wall of the annular bulge (8) exceeding the focusing ring (6) is provided with external threads.
5. The apparatus of claim 4, wherein the focusing means comprises: the periphery of the circular casing (1) is marked with scales, and the positions of the minimum value and the maximum value of the scales respectively correspond to the two ends of the positioning track groove (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010996433.2A CN112099222B (en) | 2020-09-21 | 2020-09-21 | Flat field lens assembly focusing device for telescope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010996433.2A CN112099222B (en) | 2020-09-21 | 2020-09-21 | Flat field lens assembly focusing device for telescope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112099222A CN112099222A (en) | 2020-12-18 |
| CN112099222B true CN112099222B (en) | 2022-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010996433.2A Active CN112099222B (en) | 2020-09-21 | 2020-09-21 | Flat field lens assembly focusing device for telescope |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115016093A (en) * | 2022-06-16 | 2022-09-06 | 中国科学院长春光学精密机械与物理研究所 | Horizontal telescope and camera focusing despin mechanism thereof |
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