CN2291670Y - Optical fiber unit positioning device for astronomical spectroscopic telescope - Google Patents

Abstract

The utility model relates to an optical fiber positioner used on a focal surface of an astronomical spectrum telescope, which is composed of a rotary motion mechanism and a radial translational movement mechanism which are combined. In the rotary motion mechanism, a hollow axle is driven to be rotated within the range of from-180 DEG to +180 DEG by a control motor via a reducing transmission mechanism, and in the radial translational movement mechanism, a parallelogram translational mechanism is pushed by the control motor via the transmission mechanism. A connection rod board where an optical fiber head is arranged makes a translation motion in some radial direction of the hollow shaft, and the polar coordinate positioning of the optical fiber head is realized. In addition, operation is convenient. When the utility model is used in a large-size telescope, a plurality of unit devices are assembled on an identical focal surface plate, a plurality of celestial bodies can be simultaneously observed, and when different sky regions are observed, convenient and rapid adjustment can be carried out.

Description

The fiber unit locating device that is used for astronomical solar spectral telescope

The utility model relates to the making of astronomical solar spectral telescope focal plane system, relates to the fiber orientation device on the focal plane particularly.

Optical fiber is the light receiving element of astronomical solar spectral telescope.During actual observation, by optical fiber receive head aim at gather the star picture in celestial body star image position light through Optical Fiber Transmission in spectrometer.Because it district is big, celestial body quantity is many, and telescopical bore is limited, and its focal plane area is also limited, and therefore, a telescope can only be observed a part of day district in a time.Change observation day district as need, then need adjust the position that optical fiber receives head, make the celestial body star image position in its corresponding Xin Tian district.Under the situation that the focal plane area is fixed, the observer wishes can observe simultaneously star picture as much as possible, then needs to be provided with on focal plane plate optical fiber head as much as possible, and not only requiring has higher positional precision, and can conveniently adjust, and reorientates.This feasible location and installation to optical fiber head has very high technical difficulty.Now common in the world way has following two kinds: a kind of is fixing punch method, promptly the correspondence position of the celestial body star picture of distinguishing by required observation sky on a substrate distributes and stamps the hole, optical fiber is fixedly mounted in these holes then, during observation this plate is placed on the telescopical focal plane.The DSS telescope of Univ Chicago USA is promptly installed optical fiber with this method.Its deficiency is, when the observer will change observation day district, i.e. and the fiber optic substrate that will more renew, processing capacity is very big.Because its position, hole is fixed, make fine setting very inconvenient simultaneously.Another kind of way is the magnetic clasp method, it promptly is substrate with the iron plate, in the position of each corresponding celestial body star picture a magnetic discount is set, on the top of magnetic discount one prism is arranged, it is mapped to the light deflection of celestial body star picture in the optical fiber that lies low on iron plate for 90 °, and then be transferred in the spectrometer and go, the placement of magnetic clasp head is carried out by the robot of exquisiteness.Europe ESO (Europcar Souotbcn Obscrratory) telescope is promptly used this method fixed fiber.Though this method has advantage easy to adjust, its complex structure, and also each receiving terminal all has an optical fiber to drag on substrate, therefore its cloth dot density should not be too big, because its stability and error are considered in the artificial cantilever operation of machine, generally only be applicable to small-sized fiber optic substrate simultaneously.

The purpose of this utility model is to provide a kind of optical fiber that can make to receive the fiber orientation device that head moves on the circumference that can change radial dimension, thereby the observer can fixedly be adjusted, in the disk to the position that optical fiber receives head one with the different star image position of correspondence.

The purpose of this utility model is realized by following mode.

Fiber orientation cell arrangement described in the utility model, include gyration mechanism and radial translation motion, both constitute the polar coordinates motion, described gyration mechanism drives a tubular shaft by the control motor through reduction gearing mechanism and does the transmission of ± 180 ° of scopes and constitute, this tubular shaft is bearing on the telescope focal plane plate, and its axis is vertical with focal plane plate; Described radial translation motion includes control motor and parallelogram parallel moving mechanism, described parallelogram parallel moving mechanism is by last, following two blocks of parallel-plates, hinge and link rod plate constitute, one end of two blocks of parallel-plates is hinged on the tubular shaft upper surface by hinge, the other end of two parallel-plates is hinged on the link rod plate by hinge, described control motor is fixedly mounted on the upper surface of tubular shaft, and be connected with reduction gearing mechanism, this reduction gearing mechanism includes and converts straight-line throw-over gear with rotatablely moving to, as feed screw nut's motion, the oblique contract motions of spiral etc., its last output are connected on the parallel-plate or link rod plate in the above-mentioned parallel-crank mechanism; Described link rod plate is provided with the hole that is used to install the optical fiber head, this axially bored line and tubular shaft parallel axes, and optical fiber is fixed in this hole, and optical fiber is drawn from the tubular shaft endoporus.Described hinge preferably uses flexible hinge, also can use general swing hinge.

In above-mentioned gyration mechanism and radial translation motion, for eliminating the hysterisis error that occurs in the transmission process,, elimination clearance mechanism common in the prior art can be set in gear train to guarantee the positional precision in the fibre movement, as spring anti-backlash mechanism, fixed anti-backlash mechanism etc.

The utility model is used in the optical fiber head of observation celestial body star picture when doing gyration along with tubular shaft, and under the drive of parallelogram parallel moving mechanism, do translation, the reception end face that makes optical fiber accept head does not produce deflection, optical fiber is connected on the spectrometer after passing in the tubular shaft endoporus on the other hand, basically do not rotate and produce torsional deformation with tubular shaft, therefore this device can guarantee that optical fiber head is positioned at the best and accepts the position, and receiving efficiency is preferably arranged; Simultaneously, this device makes the movement locus of optical fiber head by two Electric Machine Control, has realized the polar coordinates location, and non-blind area in its control area can accurately be located at an arbitrary position.Therefore, when the observer need change observation sky district, only need to control two control motors, optical fiber head is adjusted to new observation position accurately locate, need not change other device, thereby provide convenience to the observer.

The utility model can be used in the general astronomical solar spectral telescope, is specially adapted to large-sized astronomical solar spectral telescope.When being used for large-sized astronomical solar spectral telescope, many cell arrangements can be assembled on the same focal plane plate.When for example on the ball focal plane of diameter 1.75m, 4000 cell arrangements described in the utility model being installed, not only can realize observing simultaneously 4000 celestial bodies, and when distinguishing in the different sky of observation, the observer can adjust quickly and easily.Compare the location and installation mode of using other, the utility model also has bearing accuracy height, quick, the total advantage of low manufacturing cost in location.

Be further described below by drawings and Examples.

Fig. 1 is the utility model theory structure synoptic diagram.

(1) is control motor A among the figure, and (2) are train of reduction gears A, and (3) are tubular shaft, (4) be bearing, (5) are focal plane plate, and (6) are control motor B, (7) be train of reduction gears B, (8) be screw rod, (9) are nut, and (10), (11) are upper and lower parallel-plate, (12) be link rod plate, (13) be flexible hinge, (14) optical fiber, (15) are hold-down support.

As can be seen from Figure 1, when control motor A (1) action,, the gear that is packed on the tubular shaft is rotated, thereby tubular shaft (3) is rotated through train of reduction gears A.Tubular shaft is installed on the focal plane plate (5), and by left and right sides bearing (4) supporting, can select stepper motor for use in actual the use, makes it by the forward and reverse driving of gating pulse requirement, thereby makes tubular shaft do the rotation of ± 180 ° of scopes.When control motor B (6) rotates, driving screw rod (8) through train of reduction gears B (7) rotates, nut engaged (9) is connected on the parallel-plate (10) with it, the left and right end of upper and lower parallel-plate (10), (11) is connected on the upper surface and link rod plate (12) of tubular shaft (3) by 4 flexible hinges (13), constitute the relative tubular shaft of energy and make the parallel-crank mechanism of translation motion, when motor B drove the screw rod rotation, link rod plate (12) was along a certain diametric(al) translation of tubular shaft.The head of optical fiber (14) is fixed on the link rod plate, and optical fiber passes from the tubular shaft endoporus and draws, and the optical fiber head simultaneously, is also done circumference ± 180 ° motion along with the rotation of tubular shaft around its axis on the one hand along with link rod plate is done translation, has realized the polar coordinates location.Control motor B and reduction gearing mechanism as translation are bearing on the hold-down support (15), and this hold-down support and tubular shaft upper surface are connected.

Fig. 2 is a kind of example structure synoptic diagram of the utility model.This figure is mainly used in and expresses the radial translation motion.

Among the figure, (16) are attachment screw, pin, and (17) are the bearing that floats, and (18) are the pivot pin screw, and (19) are extension spring, and (20) are worm screw, and (21) are worm gear.

In the present embodiment, control motor A (1) drives tubular shaft by speed reduction unit and does ± 180 ° of scopes rotations.There is a big step upper end of tubular shaft (3), one end of hold-down support (15) is fixed on this step end face by attachment screw, pin (16), on hold-down support, a unsteady bearing is installed by a pivot pin screw (18), should float bearing can be with respect to the rotation of hold-down support do around the pivot pin screw, between hold-down support and unsteady bearing, be connected with an extension spring (Ben Tumo expression), in order to eliminate flank in the worm and gear transmission to the crack.Stepper motor B (6) is installed on the bearing that floats, a worm screw (20) has been rigidly connected on its output shaft, on hold-down support, be provided with screw rod (8), worm gear (21) promptly is packed on the screw shaft, the engagement of worm and gear is rotated screw rod (8), and the nut that is mated (9) is connected on the parallel-plate (11), and an end of extension spring (19) is connected and is fixed on the bearing, the other end is connected on the parallel-plate, in order to eliminate the thread pitch in the bolt and nut transmission.When stepper motor B rotates; By worm and gear and screw-and-nut mechanism, promote to have the parallel-crank mechanism swing of flexible hinge, thereby make optical fiber head do the radial translation motion.

The course of work of present embodiment is, according to by observation district star entablement mark, provide instruction by computing machine, respectively control step motor A and B, tubular shaft and parallel-crank mechanism are moved by command request, thereby optical fiber head is positioned on the respective coordinates position of tested star picture exactly.

Claims (4)

1. A fiber optic positioning unit device for astronomical spectrum telescopes, including a rotary motion mechanism and a radial translation motion mechanism, the two are combined to form a polar coordinate motion mechanism, and the rotary motion mechanism is driven by a control motor through a reduction transmission mechanism- The hollow shaft rotates in the range of ±180. The hollow shaft is supported on the focal plane of the telescope, and its axis is perpendicular to the focal plane; the radial translation movement includes a control motor and a parallelogram translation mechanism. The moving mechanism includes two upper and lower parallel plates and a connecting rod plate. One end of the upper and lower parallel plates is respectively hinged on the upper end surface of the hollow shaft by a hinge, and the other ends of the two parallel plates are respectively hinged on the connecting rod plate by a hinge. The control motor is fixedly installed on the upper end surface of the hollow shaft, and is connected with a reduction transmission mechanism. The reduction transmission mechanism includes a conversion mechanism that converts rotary motion into linear motion, and its final output member is fixed on the upper and lower sides of the planar Parallel plate or connecting rod plate; the connecting rod plate is provided with a hole for installing the optical fiber head, the axis of the hole is parallel to the axis of the hollow shaft, the optical fiber head is fixed in the hole, and the optical fiber passes through the inner hole of the hollow shaft lead out. 2. The optical fiber positioning unit device according to claim 1, characterized in that the hinge used in the plateau translation mechanism is a flexible hinge. 3. The optical fiber positioning unit device according to claim 1 or 2, characterized in that a universal rotary hinge can be used in the parallelogram translation mechanism instead of a flexible hinge. 4. The optical fiber positioning unit device according to claim 1, characterized in that a gap elimination mechanism is arranged in the reduction transmission mechanism.