Design Of Three-band Common-zoom Image Stabilization Optical System

In recent years, with the progress of science technology and the improvement of community needs, single-band zoom optical systems can not meet the diversification, facilitation and real-time requirements for access to information. Dual-band and multi-band zoom optical system, which can detect wider range targets, obtain the comprehensive object information and observe the target continuously, are favored by more and more optical design workers. In addition, It is necessary for the optical system that not only have a good image quality in a static environment but also work in a dynamic condition with the increasing complexity of application environment, which requires the system have image stabilization. Therefore, it is a hot research frontier to design a optical system which combine the multi-band zoom and image stabilization. The system is called three-band common-zoom image stabilization optical system.Currently, the majority of multi-band zoom optical system are spliced by a plurality of separate channels, which results in a relatively large scale and complex structure. And most of the optical system which can obtain the image stabilization is the telescope. It is rarely reported that a multi-band optical system which have the function of image stabilization.For the above problems, a three-band common-zoom image stabilization optical system was designed, which zoom ratio is 10x. The information of three band is accepted by the same aperture. A method has been used to compensate the focal length and zoom ration differences between the visible, mid-infrared and the long-infrared each other. In addition, A pechan prism has been used to stabilize the image. The focal length range is 8.6-86 mm. Under the normal temperature, the modulation transfer function of visible (0.38-0.76 um) is greater than 0.4 at the Nyquist frequency of 801p·mm-1; the modulation transfer function of mid-infrared(3-5 um) and long-infrared (8-10 um) is greater than 0.35 at the Nyquist frequency of 201p·mm-1. The optical system which has been designed is smaller than the conventional multi-band zoom optical system. They are lightweight and they can response faster. In addition, the system can work in motion, have the function of image stabilization.