CN2297737Y

CN2297737Y - Focal plane target identification measuring device for astronomical telescope

Info

Publication number: CN2297737Y
Application number: CN 97207384
Authority: CN
Inventors: 胡宁生; 胡之珺
Original assignee: Nanjing Research And Development Center Of Astronomical Instruments Chinese Academy Of Sciences
Current assignee: Nanjing Research And Development Center Of Astronomical Instruments Chinese Academy Of Sciences; Nanjing Astronomical Instruments Co Ltd
Priority date: 1997-03-19
Filing date: 1997-03-19
Publication date: 1998-11-18
Anticipated expiration: 2007-03-19

Abstract

The utility model relates to a focal plane target identification measuring device for astronomical telescopes, which is used for the observation of sky conditions. A mobile light source is arranged in front of a spectrograph slit and the mobile light source carries out scanning to optical fiber output ends in turn. A transmission optical fiber is used for reverse transmission, and a measuring telescope provided with a CCD completes the receiving of scanning identification and target measurement. In addition, the measuring telescope is arranged in front of an objective lens of a principal telescope. The device can also measure the coordinates of a celestial body image, and the coordinates of a celestial body image can also be used for automatic guiding on a focal plane.

Description

The focal plane Target Recognition measurement mechanism of astronomical telescope

The utility model application relates to the focal plane Target Recognition measurement mechanism of the astronomical telescope of observation day picture, belongs to the astronomical instrument field.

Before the slit of each spectrometer of multiple goal fiber spectrum astronomical telescope, be arranged with more or less a hundred fiber-optic output, in order to discern pairing day body image of each bar spectrum that spectrometer records, just need the respective input of every fiber-optic output of identification on focal plane, also need to measure the accurate coordinates value of each optic fibre input end on focal plane in some cases.Prior art adopts and numbers, arranges and patch in proper order the method at each optical fiber input, output two ends and discerns each root optical fiber, this has just proposed very complicated action request to optical fiber auto arrangement, the machine of patching, particularly when the number of fibers that needs to handle increases (modern observation often has thousands of Transmission Fibers), the corresponding increase of difficulty of developing above-mentioned machine with cost.

For being discerned with position measurement, the sequence number of the optical fiber of One's name is legion all can carry out automatically, and too complexity and cost are low again to discern measurement mechanism, present patent application provides a kind of easy, reliable measurement mechanism of identification automatically, being provided with one before spectrograph slit moves light source fiber-optic output is scanned successively, utilize Transmission Fibers to carry out reverse signal and transmit, finish the reception of scanning recognition signal and measure coordinate by being arranged on the measuring telescope of being furnished with CCD before the primary telescope object lens.This device also can be measured the coordinate of the bright day body image that is used as automatic guiding on the focal plane.

Concrete technical scheme of the present utility model is on the former basis of containing Transmission Fibers between astronomical telescope object lens, focal plane plate, spectrometer and focal plane plate and the spectrometer, being provided with one on the slit side of spectrometer is contained in by light source and collector lens on the motor-driven straight line moving slide board, after the luminous focusing of collector lens with light source, move with the movable plate straight line fiber-optic output before the spectrograph slit is shone scanning successively; In the place ahead of primary telescope object lens one measuring telescope is set, and on its object lens focal plane a charge-coupled device (CCD) is set, the object lens of measuring telescope and the object lens of primary telescope are staggered relatively.

In order in observation, to utilize the bright star guiding, the bright star picture place that each need be measured on the focal plane plate of primary telescope respectively is provided with a little convex lens that is coated with reflectance coating, and each bright star picture is other on focal plane plate is provided with N (N 〉=1) luminous optical fiber head, and this optical fiber head links to each other with collector lens with corresponding light source by N root (N 〉=1) Optical Fiber Transmission.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the utility model arrangenent diagram.

Embodiment shown in Figure 1 is as follows: light source in the drawings [8] is through collector lens [9] and the former output terminal [11] of first optical fiber before the illumination light spectrometer slit.Luminous energy is through the former input end [5] of the same optical fiber on telescope focal plane [4] behind the optical fiber and outgoing, and the former output terminal of optical fiber this moment [5] becomes luminous point.Become parallel beam and the directive sky after object lens [3] reflection through astronomical telescope of this outgoing beam, the bore that the part of this parallel beam will be injected measurement mechanism is about 100 millimeters telephotolens [2] and is about the CCD target surface [1] that the length of side on 440 millimeters the focal plane is about 40 millimeters at its focal length and goes up imaging.In Schmidt's formula astronomical telescope, this measurement mechanism can be installed in by the focal plane.Because what the CCD device recorded is proportional at the coordinate figure of the luminous point picture on its target surface and the coordinate figure of the luminous point on the astronomical telescope focal plane, therefore learn the optical fiber luminous point behind the coordinate figure of picture on the CCD target surface, just can calculate the respective coordinate value of this optical fiber luminous point on focal plane easily.

Light source [8] and collector lens [9] are installed on the straight line moving slide board [10] (this for prior art), and under a motor-driven, light source [8] and collector lens [9] will be according to each the root optical fiber outgoing end faces that throws light on according to the order of sequence of direction shown in the arrow among the figure.Simultaneously, the CCD device in the focal plane target measurement device is just noted the coordinate of former input end on focal plane of each root optical fiber according to the order of sequence, has also promptly finished the automatic identification of optical fiber sequence number.

This device also can be measured the coordinate that is used as automatic guiding on the astronomical telescope focal plane or proofreaies and correct bright day body image of focal plane plate position.A little convex reflecting mirror [7] is placed in the front of bright star on the focal plane in the drawings, it diminishes the cone angle of dispersing light cone of bright star light and the object lens [3] that reflex to astronomical telescope form parallel beam directive sky, and the part in this parallel beam will be injected the object lens [2] of measurement mechanism and CCD target surface [1] on its focal plane is gone up imaging.In order to improve to the measuring accuracy of bright star coordinate and the influence of temperature drift that is not subjected to the collimation line of astronomical telescope and measuring telescope, bright star side at focal plane can be placed with reference to luminous point [6], it is imaging on the CCD target surface [1] by the bright star picture through the object lens [2] of the object lens [3] of astronomical telescope and measurement mechanism under the illumination of light source [13] and collector lens [12].The CCD device measurement compared the bright star picture and with reference to the coordinate figure of luminous point picture after can send the guiding deviation correcting signal to the tracker of astronomical telescope.

Claims

1. the focal plane Target Recognition measurement mechanism of an astronomical telescope, include the Transmission Fibers between telescope objective, focal plane plate, spectrometer and focal plane plate and the spectrometer, it is characterized in that being provided with one on the slit side of spectrometer is contained in by light source and collector lens on the motor-driven straight line moving slide board, after the luminous focusing of collector lens with light source, move with the movable plate straight line fiber-optic output before the spectrograph slit is shone scanning successively; In the place ahead of primary telescope object lens one measuring telescope is set, and on its object lens focal plane a charge-coupled device (CCD) is set, the object lens of measuring telescope and the object lens of primary telescope are staggered relatively.

2. the focal plane Target Recognition measurement mechanism of astronomical telescope according to claim 1 is characterized in that the bright star picture place that each need be measured on the focal plane plate of primary telescope also respectively is provided with a little convex lens that is coated with reflectance coating.

3. the focal plane Target Recognition measurement mechanism of astronomical telescope according to claim 2, it is characterized in that on focal plane plate that each bright star picture is other is provided with N (N 〉=1) luminous optical fiber head, and this optical fiber head links to each other with collector lens with corresponding light source by N root (N 〉=1) Optical Fiber Transmission.