Method and apparatus for agile light path steering

An optical system comprising:

• a light transceiver having a steering axis associated with such light transceiver, wherein the light transceiver transmits and/or receives a first light beam along an external light path;
• a first beam-deviation optical element, which controls the external light path, including a first prism having a first diffraction grating thereon, and wherein the steering axis passes through the first beam-deviation optical element, the first prism and the first diffraction grating collectively providing a first grism,
• the first prism diffraction grating having a diffraction order in the first order ;
• and
• a second beam-deviation optical element, which also controls the external light path, including a second prism structure having a second diffraction grating thereon, wherein the steering axis passes through the second beam-deviation optical element, the second prism and the second diffraction grating collectively providing a second grism;
• the second prism diffraction grating also having a diffraction order in the first order;
• and
• a rotational drive assembly operable to provide rotation to at least one of the first beam-deviation optical element and the second beam-deviation optical element about the steering axis, and
• the rotation adjusting an angle of the external light path as compared with the steering axis.