Personal LADAR sensor

An apparatus for personal scene detection comprising:

• a personal ladar sensor with a field of view and a wavelength of operation having
• a semiconductor laser with a laser light output digitally modulated using a Barker code, and a diffusing optic for illuminating a scene in the field of view of said personal ladar sensor,
• a zero reference circuit having a zero range reference output, and the zero range reference output indicating the time of emission of said laser light output,
• a two dimensional array of light sensitive detectors positioned at a focal plane of a light collecting and focusing system, each of said light sensitive detectors with an output producing an electrical response signal from a reflected portion of said laser light output,
• a readout integrated circuit with a plurality of unit cell electrical circuits, each of said unit cell electrical circuits having an input connected to one of said light sensitive detector outputs, each said unit cell electrical circuit having an electrical response signal demodulator with a demodulator output, and a range measuring circuit connected to said demodulator output, said range measuring circuit further connected to said zero range reference output, and each range measuring circuit having a range output adapted to provide a range measurement derived from the demodulator output and the zero range reference output,
• and said readout integrated circuit further having an output control section
• adapted to select a unit cell range output, and output a range measurement,
• a detector bias circuit connected to at least one voltage distribution grid of said array of light sensitive detectors, and a temperature stabilized frequency reference;
• said personal ladar sensor mounted inside a radome attached to a personal electronic device, said radome comprising at least one transparent surface adapted to transmit light at said wavelength of operation.