CN101604068A - Optoelectronic scanning telescope - Google Patents

Abstract

A kind of astronomical sight equipment of optoelectronic scanning telescope, solve large tracts of land sky district effectively and monitor an observation difficult problem, key breakthrough the combination of precise rotating platform and CCD state-of-the-art technology, realize turntable velocity of rotation and CCD interline transfer frequency strict synchronism, and to the turntable orientation, the accurate collection of information such as time, the final data disposal system is by the orientation values that collects, time, weather data and utilization are carried out real-time relevant treatment to the front and back image of same lens barrel or the ccd image of adjacent lens barrel, and result, as target direction, pitching and time value send to makes the further analyzing and processing in data center.This equipment is mainly used fields such as astronomical sky patrol, low rail artificial object monitoring, low latitude military surveillance and early warning, and the system architecture height is integrated, cost is low, the automaticity height.

Description

Optoelectronic scanning telescope

Technical field

Astronomical observation instrument

Background technology

Tradition separate unit photo-electric telescope can only expose in the district to a certain Xiao Tian on the celestial sphere and obtain position of heavenly body and luminosity information, utilize many cover photo-electric telescopes to point to the photo-electric telescope array of not distinguishing on the same day and forming independently, be the coverage that can increase observation day district, but bring equipment manufacturing cost high and level of integrated system is low.Compare with traditional photo-electric telescope or photo-electric telescope array, the optoelectronic scanning telescope advantage is as follows:

1) same day district covered, unit reduces.

2) integrated, the automaticity of system height also improves.

3) floor area reduces, and dome capital construction is required to reduce.

4) the total system construction costs is wanted much less relatively.

5) range of application is more extensive, as astronomical sky patrol, artificial satellite monitoring and low latitude military surveillance.

6) improved the device observes service efficiency.

Summary of the invention

The big field angle optical design technology that the optoelectronic scanning telescope utilization has made a breakthrough at present, select big target surface scientific grade CCD (ChargeCoupled Device, charge-coupled image sensor), in conjunction with high-accuracy turntable (no angle range restriction), make telescope mirror velocity of rotation and light signal receiving time shutter synchronous, to obtain to the sky observation data.Can be according to the system design demand, select big field angle lens barrel one or more, be equipped with corresponding high performance CCD, strict control turntable rotating speed, adjust CCD interline transfer frequency, make observed object stable exposure on the CCD target surface, like this, can periodically carry out uninterrupted Continuous Observation to sky sustained height band (ring-type sky district), thereby the celestial body in district is monitored to this day, utilization is handled to obtain unusual target, as supernova in real time to the front and back image of same lens barrel or the image of adjacent lens barrel, the position of solar system near-Earth object and artificial object and monochrome information.

Fig. 1 is the whole side schematic view of optoelectronic scanning telescope, and Fig. 2, Fig. 3 are respectively the center, visual field and point to the altitudinal belt of 22 ° and 36 ° and be made up of 4 big visual field lens barrels, can improve the sample frequency to the space.Like this, the optoelectronic scanning telescope system can cover pitching from 15 ° to 45 ° All Ranges, according to current C CD state-of-the-art technology, system has the ability to carrying out complete observation once to system covering space zone per 2 seconds, and the same space position time shutter can reach 250 milliseconds.

Embodiment

Optoelectronic scanning telescope is made up of subsystems such as turntable, big visual field lens barrel, CCD, clock, frequency generator, weather information, master control and data processing, telescope requires to propose day CCD time shutter of district's observation according to master control, by time shutter calculating CCD interline transfer frequency, according to the accurate telescope velocity of rotation of calculating of following formula, drive telescope turntable average rate and rotate at last.

$V=\mathrm{freq}\×\mathrm{arctg}\frac{\mathrm{Pixelwidth}}{f}$

Wherein pixel size Pixelwidth is a CCD shift direction pixel dimension, and f is the focal length of big visual field lens barrel, and interline transfer frequency f req is that CCD is at telescope velocity of rotation opposite direction pixel transition frequency.

System sends to frequency generator according to the interline transfer frequency values that calculates, and generates the square wave drive CCD exposure interline transfer of corresponding frequencies, triggers simultaneously and latchs turntable orientation values and clock value and read storage in real time.The final data disposal system is carried out real-time relevant treatment by the front and back ccd image of orientation values, time, weather data and the same lens barrel gathered or the ccd image of adjacent lens barrel, and result is sent to data center makes further analyzing and processing.

Claims (4)

1, big field angle lens barrel, CCD (Charge Coupled Device, charge-coupled image sensor) and high-accuracy turntable organically combine, and can periodically carry out uninterrupted Continuous Observation to sky sustained height band (ring-type sky district).

2, the CCD drift scanning is read and is also claimed time delay integration (TDI, Time Delay Integration) to read the observation that is used for equal altitudes sky district.

3, can be in the sustained height band by many big field angle lens barrels, to improve ring-type sky district observed samples frequency.

4, optoelectronic scanning telescope can be installed big field angle lens barrel at differing heights ring-type sky district band, covers to increase the observation of short transverse sky district.

Images