US 10,371,785 B2 · Polar axis calibration system, electronic polar scope, polar axis calibration control device, and equatorial instrument and telescope comprising the same

Abstract

A polar axis calibration system (100) comprises: a polar scope (10), a polar axis calibration control device (20) and a display device (30). The polar scope comprises an optical lens (11) and an image sensor (12) for collecting constellation images (IM); the polar axis calibration control device receives the constellation images from the polar scope and determines the position (P1) of the rotation center of the polar axis and the celestial pole position (P2), the position of the rotation center of the polar axis means the position of the rotation center (R0) of the polar axis (510) of the equatorial instrument in the plane of the constellation image, and the celestial pole position means the position of the celestial pole in the plane of the constellation image; and the display device is coupled to the polar axis calibration control device and used to display the constellation image, the celestial pole position and the position of the rotation center of the polar axis. The present invention also provides a polar scope, a polar axis calibration control device, as well as an equatorial instrument (500) and an astronomical telescope comprising the aforesaid polar scope or polar axis calibration system. According to the present disclosure, it is possible to align the celestial pole position directly with the rotation center of the polar axis, thus improving the calibration accuracy. Furthermore, it is possible to lower the requirements for the installation accuracy of the polar scope.

Claims16

Dependent claims

A polar axis calibration system for an equatorial instrument, the equatorial instrument having a polar axis, the polar axis calibration system comprising:

a polar scope, comprising an optical lens and an image sensor for collecting constellation images;
and
a polar axis calibration control device, for receiving the constellation images from the polar scope and determining the position of the rotation center of the polar axis and the celestial pole position based on the constellation images, wherein the position of the rotation center of the polar axis means the position of the rotation center of the polar axis of the equatorial instrument in the plane of the constellation images, and the celestial pole position means the position of the celestial pole in the plane of the constellation images.

A polar axis calibration control device for an equatorial instrument, the equatorial instrument comprising a polar axis, wherein the polar axis calibration control device receives constellation images from a polar scope, which is mounted on the equatorial instrument and rotates along with the polar axis, and determines the position of the rotation center of the polar axis and the celestial pole position based on the constellation images, the position of the rotation center of the polar axis means the position of the rotation center of the polar axis of the equatorial instrument in the plane of the constellation image, and the celestial pole position means the position of the celestial pole in the plane of the constellation image,

the polar axis calibration control device comprises:
a rotation-center-of-the-polar-axis determining module, which determines the position of the rotation center of the polar axis through the following operations:
obtaining three constellation images collected by the polar scope when the polar scope is rotated to three different positions along with the polar axis of the equatorial instrument;
finding a same star in the three constellation images;
obtaining three position coordinates of the same star in the three constellation images;
and
calculating the position of the rotation center of the polar axis based on the three position coordinates,
and
a celestial-pole-position determining module, which determines the celestial pole position through the following operations;
obtaining the constellation images collected by the polar scope;
identifying at least two stars in the constellation images;
obtaining the star position coordinates of the at least two stars in the constellation images;
and
determining the celestial pole position based on the star position coordinates and the relative positional relationship among the stars and the celestial pole.

11 more elements

Dependencies are inferred from the claim text.

Polar axis calibration system, electronic polar scope, polar axis calibration control device, and equatorial instrument and telescope comprising the same

Life of this patent

Polar axis calibration system, electronic polar scope, polar axis calibration control device, and equatorial instrument and telescope comprising the same

Life of this patent

Abstract

Claims16