阅读说明：本技术 一种利用反射镜的锥扫观星实现方法 (Method for realizing cone scanning star observation by utilizing reflecting mirror ) 是由 王海涌 王勇帅 朱宏玉 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种利用反射镜的锥扫观星实现方法,涉及仪器仪表领域和天文导航领域,可改善锥扫机构的结构动力特性。所述内容包括：反射镜紧固在旋转轴上,与旋转轴成一定角度,相机或星敏感器静基座安装。旋转轴与相机或星敏感器的光轴保持重合或平行,所述两个轴的间距足够小以保障反射光场景可以覆盖相机或星敏感器视场。电机等动力模块驱动旋转轴带动反射镜实现锥扫,锥扫母线为相机或星敏感器的光轴在反射面的转折方向,在锥扫过程中相机或星敏感器拍摄沿母线方向的周边天区,采集星空图像序列。本发明适用于锥扫式相机或星敏感器,只利用反射镜的锥扫比带动整个光学系统进行锥扫,结构质量更小,可明显改善锥扫机构的结构动力特性。(The invention discloses a method for realizing the viewing of a star by using a cone scanning of a reflector, relates to the field of instruments and meters and the field of astronomical navigation, and can improve the structural dynamic characteristic of a cone scanning mechanism. The content comprises the following steps: the reflector is fastened on the rotating shaft and forms a certain angle with the rotating shaft, and the camera or the star sensor static base is installed. The rotating shaft and the optical axis of the camera or the star sensor are kept coincident or parallel, and the distance between the two shafts is small enough to ensure that a reflected light scene can cover the view field of the camera or the star sensor. And the motor and other power modules drive the rotating shaft to drive the reflector to realize cone scanning, a cone scanning bus is the turning direction of the optical axis of the camera or the star sensor on the reflecting surface, and the camera or the star sensor shoots a peripheral sky area along the bus direction in the cone scanning process to acquire a starry sky image sequence. The invention is suitable for a cone scanning type camera or a star sensor, only utilizes the cone scanning ratio of the reflector to drive the whole optical system to carry out cone scanning, has smaller structural mass, and can obviously improve the structural dynamic characteristic of the cone scanning mechanism.)

1. A method for realizing the star viewing by cone scanning by using a reflector is characterized by comprising the following steps: the reflector is fastened on the rotating shaft and forms a certain angle with the rotating shaft, and the camera or the star sensor static base is installed.

2. The cone-scan star realization method using reflectors as claimed in claim 1, wherein: the rotating shaft and the optical axis of the camera or the star sensor are kept coincident or parallel, and the distance between the two shafts is small enough to ensure that a reflected light scene can cover the view field of the camera or the star sensor.

3. The cone-scan star realization method using reflectors as claimed in claim 1, wherein: and the motor and other power modules drive the rotating shaft to drive the reflector to realize cone scanning, a cone scanning bus is the turning direction of the optical axis of the camera or the star sensor on the reflecting surface, and the camera or the star sensor shoots a peripheral sky area along the bus direction in the cone scanning process to acquire a starry sky image sequence.

Technical Field

The invention relates to the field of instruments and meters and the field of astronomical navigation, in particular to a cone scanning star observation implementation method by utilizing a reflector.

Background

The day star viewing and attitude determination of the star sensor are key technologies of astronomical navigation in the current atmosphere, and two technical routes of a multi-view-field star sensor device and a cone scanning type star sensor device exist at present. The multi-view field star sensor device is generally called a multi-view star sensor, and the problem of insufficient observed star quantity of the small-view field star sensor is solved by increasing the number of lenses, but the method causes the problems of large equipment volume, complex structure and circuit and the like. The cone scanning type star sensor device controls the whole optical system to rotate around the main shaft to realize cone scanning, but the whole optical system has large mass, and the vibration generated in dynamic motion can prevent the star sensor from imaging clearly. Therefore, the invention designs a method for realizing the cone scanning of the star by using the reflecting mirror, only uses the cone scanning ratio of the reflecting mirror to drive the whole optical system to carry out cone scanning, has smaller structural quality, and can obviously improve the structural dynamic characteristic of the cone scanning mechanism.

Disclosure of Invention

The invention aims to provide a method for realizing cone scanning by using a reflecting mirror, which reduces the quality of a scanning component and improves the structural dynamic characteristic of a cone scanning mechanism.

The purpose of the invention is realized by the following technical scheme: the reflector is fastened on the rotating shaft and forms a certain angle with the rotating shaft, and the camera or the star sensor static base is installed. The rotating shaft and the optical axis of the camera or the star sensor are kept coincident or parallel, and the distance between the two shafts is small enough to ensure that a reflected light scene can cover the view field of the camera or the star sensor. And the motor and other power modules drive the rotating shaft to drive the reflector to realize cone scanning, a cone scanning bus is the turning direction of the optical axis of the camera or the star sensor on the reflecting surface, and the camera or the star sensor shoots a peripheral sky area along the bus direction in the cone scanning process to acquire a starry sky image sequence.

The beneficial effects of the invention are illustrated as follows:

the invention provides a method for realizing the viewing of a star by using a cone scanning of a reflector, which is suitable for a cone scanning type camera or a star sensor, only uses the cone scanning ratio of the reflector to drive the whole optical system to carry out cone scanning, has smaller structural mass, and can obviously improve the structural dynamic characteristic of a cone scanning mechanism.

Drawings

FIG. 1 is a schematic diagram of the present invention;

fig. 2 is a schematic view of the apparatus in the preferred embodiment.

Detailed Description

The principles of the present invention are described in detail below:

the law of reflection of light refers to the fact that when light strikes an interface, the reflected light rays are at the same angle as the incident light rays.

As shown in fig. 1, an incident star 101 is obliquely projected toward a mirror 103, and a reflected star 102 enters a lens of a camera or star sensor 104. The reflector is fastened with the rotating shaft, the included angle between the reflector and the rotating shaft is constant, the rotating shaft drives the reflector to rotate, the optical axis of the camera or the star sensor is turned on the reflecting surface according to the law of reflection, and the field of view of the camera or the star sensor rotates along with the rotating shaft to realize conical scanning. The rotating shaft and the main optical axis of the star sensor are arranged in alignment, so that the reflected starlight scene can cover the view field of the optical system in the cone scanning process.

The present invention will be described in further detail with reference to preferred embodiments. The following examples are given to illustrate the present invention, but are not intended to limit the scope of the present invention.

Figure 2 is a preferred embodiment designed according to this invention. The motor 202 and the rotating shaft 203 of the preferred embodiment are installed on the upper portion of the frame structure 201, the star sensor 206 is installed on the lower portion of the frame structure 201, and the rotating shaft 203 is aligned with the main optical axis of the star sensor 206. The mirror 204 is mounted at the other end of the rotation axis 203 in a plane that makes an angle of less than 45 ° with the rotation axis. The light shield 205 may filter stray light that affects reflections.

In the preferred embodiment, the angle between the reflector 204 and the rotation axis 203 is 22.5 °, and according to the principle shown in fig. 1, the angle formed by the optical axis direction of the turn of the star sensor 206 and the main optical axis direction is 45 °. In the working state, the motor 202 drives the reflector 204 to rotate through the rotating shaft 203, and the optical axis direction of the turn of the star sensor 206 rotates along with the reflector 204 and scans along the conical surface with the half cone angle of 45 degrees.