Abstract: A derotation mirror system for a common-optical-path panoramic stabilized periscope. The derotation system has a first surface-reflecting mirror, a second surface-reflecting mirror and a third surface-reflecting mirror. Through subsequent reflection of light from the surface of the first surface-reflecting mirror, the second surface-reflecting mirror, the third surface-reflecting mirror and a rotation of the entire derotation mirror system with respect to the Z-axis, the derotation is achieved. Since this invention only requires three reflections, the derotation system allows the lights with various wavebands (such as visible light, infrared light and laser beam). In addition, the derotation system manages to constrain the propagation of the output image vector and the output image vector along the same Z-axis line.

Abstract: A field-of-view switching and focusing system of a common-optical-path periscope, having an aspherical reflecting mirror system, a field-of-view driving system and a focus driving system. The field-of-view driving system and the focus driving system are located at two sides of the aspherical reflecting mirror system. The field-of-view driving system allows the aspherical reflecting mirror system to rotate, thereby, different curved faces of the aspherical reflecting mirror can reflect the incident light, so that the field of view can be switched. Further, by a linear movement of the aspherical reflecting mirror system driven along the optical path by the focus driving system, the focus fine adjustment is performed.