초록

An optical system makes use of solar illumination as a light source to achieve covert operation.

대표청구항 ▼

A system for sensing optical characteristics of equipment located on a remote target, said equipment including at least one optical sensor oriented to receive optical illumination from directions which include said sensing system, comprising: target illumination means for directing a time controlled

A system for sensing optical characteristics of equipment located on a remote target, said equipment including at least one optical sensor oriented to receive optical illumination from directions which include said sensing system, comprising: target illumination means for directing a time controlled burst transmission of solar radiation from said sensing system in the direction of said target, to illuminate said target with solar radiation, said illumination means including a solar radiation collector, an optical modulator and an optical projector for emitting solar radiation modulated by said modulator in said target direction; retro-reflection receiving means for detecting solar radiation from said illumination means which is retro-reflected in a focused beam from the optical components of said optical sensor, said receiving means including means for collecting said retro-reflected light and providing said light on an optical path; and radiation measuring means, responsive to said light on said optical path, for measuring selected properties of said light representative of characteristics of the optical components of said optical sensor, thereby to determine said characteristics.