Abstract: An optical device creates a 3D image of a volume of interest comprising horizontal, vertical, and distance information for each voxel. An illumination beam director and an imaging beam director are synchronized to each point to a selected, arbitrary, dynamically selectable reduced field of view, within a total field of view. Each reduced field of view is illuminated at once by a modulated continuous wave light source; and is imaged at once, using a pixel-array image sensor comprising time-of-flight for each of at least 8,000 pixels. The device sequences through 4 to 600 reduced fields of view until the total field of view is imaged. The device is free of rotating mechanical components. The pixel-array image sensor demodulates synchronously with the light source. Modulation frequency and sensor integration time are dynamically adjusted responsive to a desired volume of interest or field of view.

Abstract: An optical device creates a 3D image of a volume of interest comprising horizontal, vertical, and distance information for each voxel. Two pairs of two Risley prisms rotate synchronously to first create outgoing modulated illumination beams, and second to direct incoming light to an image sensor. Synchronization allows the imaging portion of the system to look at the same field of view as is illuminated. This field of view is smaller than the volume of interest. The field of view is scanned both horizontal and vertically to encompass the volume of interest, and may by directed to any arbitrary field of view. The illumination beam is amplitude modulated. The image sensor demodulates synchronously, computing time-of-flight for each pixel. Modulation frequency and sensor integration time are dynamically adjusted responsive to a desired volume of interest or field of view.