A panoramic stabilized periscope with common optical path

"Panoramic stabilization" and "common optical path" as designed are two significant issues regarding the technology of periscope detection. The idea of "panoramic stabilization" is to construct a pseudo level coordinate while in 360/spl deg/ searching. Sighting vector to the target expressed by spherical coordinate should be based on this panoramic stabilized level. The design of "common optical path" entirely employs a set of reflection mirrors with folded optical path for various light wave bands to shorten the size of the periscope. Devices associated with these features are developed and wrapped up in terms of an analysis of conceptual configuration.