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CN202486409U - Astronomical telescope back-end precision auto-focusing device - Google Patents

Astronomical telescope back-end precision auto-focusing device Download PDF

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Publication number
CN202486409U
CN202486409U CN201220045166.1U CN201220045166U CN202486409U CN 202486409 U CN202486409 U CN 202486409U CN 201220045166 U CN201220045166 U CN 201220045166U CN 202486409 U CN202486409 U CN 202486409U
Authority
CN
China
Prior art keywords
worm gear
focusing
worm
stationary magazine
magazine creel
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.)
Expired - Fee Related
Application number
CN201220045166.1U
Other languages
Chinese (zh)
Inventor
周志中
王金虎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Astronomical Observatories of CAS
Original Assignee
National Astronomical Observatories of CAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by National Astronomical Observatories of CAS filed Critical National Astronomical Observatories of CAS
Priority to CN201220045166.1U priority Critical patent/CN202486409U/en
Application granted granted Critical
Publication of CN202486409U publication Critical patent/CN202486409U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a rear-end precision automatic focusing device for an astronomical telescope. The rear-end precision automatic focusing device comprises a fixing barrel, a stepping motor, a worm gear, a focusing inner barrel, a limit support, a Hall-effect switch and a control system. A guide groove extending along the axial direction is arranged on the fixing barrel, the stepping motor is mounted on the fixing barrel through a motor base, a worm is arranged at a power output end of the stepping motor, the worm gear is matched with the worm and is rotatably sleeved outside the fixing barrel through a close bead shaft system, an internal thread is arranged on the inner circumferential surface of the worm gear, the focusing inner barrel is sleeved in the fixing barrel, a threaded slider is mounted on the focusing inner barrel, positioned in the guide groove and provided with an external thread matched with the internal thread of the worm gear, the limit support is arranged on the fixing barrel, and the control system is used for receiving and processing a detection signal of the Hall-effect switch and outputting a control signal to the stepping motor. The worm gear and the worm drive the threaded slider to move in the guide groove, circumferential movement is transformed into horizontal linear movement, and the purpose of focusing is achieved.

Description

The accurate automatic focusing device in astronomical telescope rear end
Technical field
The utility model relates to the accurate automatic focusing device in a kind of astronomical telescope rear end.
Background technology
The most of method of secondary mirror focusing that adopts of general large-scale professional astronomical telescope focus adjusting mechanism obtains; The method that adopts primary mirror and rear end focusing is also arranged for some race glasses; And most rear end focus control all adopts transmissions such as rack-and-pinion to realize; Its shortcoming is to carry overweight terminal device, and its stability and precision are all relatively poor, is prone to be not intended to run into focus adjusting mechanism in the use and makes focal length variations etc.
Summary of the invention
To the problem that prior art exists, the purpose of the utility model is to provide a kind of simple in structure, accurate automatic focusing device in the high astronomical telescope of precision rear end.
The accurate automatic focusing device in a kind of high astronomical telescope rear end that the utility model provides comprises:
Stationary magazine creel offers the gathering sill that in axial direction extends on the said stationary magazine creel;
Stepper motor is installed on the said stationary magazine creel through motor cabinet, and the clutch end of said stepper motor is provided with worm screw;
Worm gear, suitable with said worm screw, and be sleeved on outside the said stationary magazine creel through dense ball bearing shafting is rotatable, the inner peripheral surface of said worm gear is provided with internal thread;
The focusing inner core is set in the said stationary magazine creel, on the said focusing inner core thread slider is installed, and said thread slider is positioned at said gathering sill, and has on the said thread slider and the suitable external thread of the internal thread of said worm gear;
Limiting bracket is arranged on the said stationary magazine creel, and this limiting bracket has along the axially extended extension of said worm gear;
Hall switch is arranged on the said limiting bracket;
Magnet holder is arranged on the said focusing inner core;
Magnet is arranged on the said magnet holder;
Control system receives and handles the detection signal of said Hall switch, and to said stepper motor output control signal.
The utility model mainly is made up of the structures such as stepper motor, worm and gear, high precision dense ball bearing shafting and thread slider, focusing inner core and Hall switch of band segmentation, and the inner core of wherein focusing can connect different rear end equipment.The stepper motor outputting power drives thread slider through worm and gear and in gathering sill, moves, thereby accomplished the conversion of circular motion to horizontal rectilinear motion, has realized the purpose of focusing.
In addition, the utility model also have simple in structure, precision is high, double self locking property; No backlash, focus is not rotated, good stability; Load-bearing capacity is big; Easy to operate, can focusing automatically adjust, can prevent that user's collision unintentionally, extruding from causing the advantages such as focal length variations that regulated simultaneously again.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
As shown in Figure 1, the utility model comprises: stationary magazine creel 1, stepper motor 3, worm gear 5, worm screw 4, focusing inner core 7, Hall switch 12, limiting bracket 14, magnet holder 15, magnet 13 and control system 11.Specific as follows:
Offer the gathering sill 10 that in axial direction extends on the stationary magazine creel 1, stepper motor 3 is installed on the stationary magazine creel 1 through motor cabinet 2, and worm screw 4 is arranged on the clutch end of stepper motor 3.Worm gear 5 is suitable with worm screw 4, and through dense ball bearing shafting 6 rotatable being sleeved on outside the stationary magazine creel 1, the inner peripheral surface of worm gear 5 is provided with internal thread.Focusing inner core 7 is set in the stationary magazine creel 1, on the focusing inner core 1 thread slider 8 is installed, and thread slider 8 is positioned at gathering sill 10, and has on the thread slider 8 and the suitable external thread of the internal thread of worm gear 5.Limiting bracket 14 is arranged on the stationary magazine creel 1, and this limiting bracket 14 has along worm gear 5 axially extended extensions.Hall switch 12 is arranged on the extension of limiting bracket 14.Magnet holder 15 is arranged on the focusing inner core 7.Magnet 13 is arranged on the magnet holder 15.
Control system 11 receives and handles the detection signal of Hall switch 12, and to stepper motor 3 output control signals.
During use, stepper motor 3 rotations drive worm screw 4 rotations, and worm screw 4 drives worm gear 5 rotations again; Thread slider 8 just moves along gathering sill 10; Make focusing inner core 7 move, thereby realize the conversion of circular motion, realized the purpose of focusing to horizontal rectilinear motion along the axial straight line of focusing inner core 7.
Simultaneously, control system 11 can realize automatic focusing according to the positional information of the detection magnet 13 of Hall switch 12, and in the utility model, the system that control system 11 adopts computing machine and single-chip microcomputer to form realizes control.

Claims (1)

1. the accurate automatic focusing device in high astronomical telescope rear end is characterized in that, comprising:
Stationary magazine creel offers the gathering sill that in axial direction extends on the said stationary magazine creel;
Stepper motor is installed on the said stationary magazine creel through motor cabinet, and the clutch end of said stepper motor is provided with worm screw;
Worm gear, suitable with said worm screw, and be sleeved on outside the said stationary magazine creel through dense ball bearing shafting is rotatable, the inner peripheral surface of said worm gear is provided with internal thread;
The focusing inner core is set in the said stationary magazine creel, on the said focusing inner core thread slider is installed, and said thread slider is positioned at said gathering sill, and has on the said thread slider and the suitable external thread of the internal thread of said worm gear;
Limiting bracket is arranged on the said stationary magazine creel, and this limiting bracket has along the axially extended extension of said worm gear;
Hall switch is arranged on the said limiting bracket;
Magnet holder is arranged on the said focusing inner core;
Magnet is arranged on the said magnet holder;
Control system receives and handles the detection signal of said Hall switch, and to said stepper motor output control signal.
CN201220045166.1U 2012-02-13 2012-02-13 Astronomical telescope back-end precision auto-focusing device Expired - Fee Related CN202486409U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201220045166.1U CN202486409U (en) 2012-02-13 2012-02-13 Astronomical telescope back-end precision auto-focusing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201220045166.1U CN202486409U (en) 2012-02-13 2012-02-13 Astronomical telescope back-end precision auto-focusing device

Publications (1)

Publication Number Publication Date
CN202486409U true CN202486409U (en) 2012-10-10

Family

ID=46960819

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201220045166.1U Expired - Fee Related CN202486409U (en) 2012-02-13 2012-02-13 Astronomical telescope back-end precision auto-focusing device

Country Status (1)

Country Link
CN (1) CN202486409U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109116544A (en) * 2018-10-19 2019-01-01 南通斯密特森光电科技有限公司 Telescope single hand wheel focusing holder assembly
CN110727076A (en) * 2019-09-29 2020-01-24 舜宇光学(中山)有限公司 Focusing structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109116544A (en) * 2018-10-19 2019-01-01 南通斯密特森光电科技有限公司 Telescope single hand wheel focusing holder assembly
CN109116544B (en) * 2018-10-19 2024-02-23 南通斯密特森光电科技有限公司 Single hand wheel focusing seat assembly for telescope
CN110727076A (en) * 2019-09-29 2020-01-24 舜宇光学(中山)有限公司 Focusing structure

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121010

Termination date: 20130213