Abstract: Various aspects as described herein are directed to apparatuses, methods, and systems including a sandwiched arrangement having a light-access port, a scanning mirror, an optics region, and a spacer. The spacer provides a light-directing optical region that separates the scanning mirror and the optics region, and includes a mirrored surface that reflects light between the light-access port and the optics region. Additionally, the optics region includes a curved-shaped window that provides a field of view by communicating beams of light between a target region. The optics region also includes a curved-shaped mirror having a surface that reflects light between the scanning mirror and the mirrored surface. Light beams, as conveyed between the light-access port and the curved-shaped window, are folded by being reflected off the scanning mirror, the curved-shaped mirror and the mirrored surface.

Abstract: A sensor array and method for remotely monitoring environmental effects on a selected sensor. In a sensor array comprising a plurality of interferometers, an optical signal of a selected configuration is provided so that portions of the optical signal are propagated through the interferometers. The optical signal configuration causes optical signal portions which have traveled the same signal path, except where separated on signal paths in a selected interferometer, to coherently mix when combined at an output of the selected interferometer. No other optical signal portions in the sensor array will coherently mix. The optical signal comprises plural components such as side bands which are configured to form a power spectrum defining an optical signal coherence function having a maximum which repeats periodically at a rate substantially corresponding to optical signal travel time difference in the selected interferometer.