The Method of Telescope Focusing System
Background technique:
In general, telescope focusing is achieved by directly judging the clarity of the target image. However, in a system that performs optical precision tracking or laser strike on a moving target, due to the distance of the target and the size of the target vary greatly, it is difficult to quickly realize it by directly judging the clarity (or sharpness) of the target image. Accurate focusing of the telescope system on the target.
Technical realization elements:
The object of the present invention is to provide a telescope focusing system and method with simple and reliable structure.
In order to achieve the purpose of the above invention, the embodiments of the present invention provide the following technical solutions:
A telescope focusing system, including a laser ranging unit, a signal processing unit and a focusing execution unit, wherein,
The laser ranging unit is used to measure the distance from the telescope to the target;
The signal processing unit is used to process the target distance data into a focusing amount and output a control signal;
The focus execution unit is configured to execute a focus action under the control of the control signal.
A telescope focusing system includes a Hartmann wavefront sensor unit, a signal processing unit and a focusing execution unit, wherein,
The Hartmann wavefront sensor unit is used to perform aperture segmentation and sub-aperture imaging on the light beam received by the telescope from the target, and output sub-aperture image signals;
The signal processing unit is used to process the sub-aperture image signal into a defocus amount, and output a control signal;
The focus execution unit is configured to execute a focus action until the defocus amount is zero under the control of the control signal.
A telescope focusing system, including a laser ranging unit, a Hartmann wavefront sensor, a signal processing unit and a focusing execution unit, wherein,
The laser ranging unit is used to measure the distance from the telescope to the target;
The Hartmann wavefront sensor unit is used to perform aperture segmentation and sub-aperture imaging on the light beam received by the telescope from the target, and output sub-aperture image signals;
The signal processing unit is configured to process the target distance data as a focusing amount, and output a first control signal; or process the sub-aperture image signal as a defocusing amount, and output a second control signal;
The focus execution unit is configured to execute a focus action under the control of the first control signal or the second control signal.
A telescope focusing method, comprising steps:
Use the laser ranging method to measure the target distance;
Treat target distance as focus amount;
According to the focusing amount, the distance between the primary mirror and the secondary mirror of the telescope is changed to complete the focusing.
A telescope focusing method, comprising steps:
The light from the target received by the telescope passes through the Hartmann wavefront sensor to output sub-aperture image signals;
processing the sub-aperture image signal into a defocus amount;
Change the distance between the primary mirror and the secondary mirror of the telescope until the defocus amount is zero.
Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention uses the data of the laser ranging unit or the Hartmann wavefront sensor unit to calculate the defocus amount of the telescope, and when the target distance is long or the target size is small, the The data of the Hartmann wavefront sensor unit is used to calculate the defocus amount. When the target distance is close or the target size is large, the data of the laser ranging unit is used to calculate the focus amount. Therefore, no matter whether the target distance is far or short, the target size Large or small, the telescope can accurately focus on the target, the system structure is simple, and the operation is easy.
