Gated 3D camera

摘要

A camera for determining distances to a scene, the camera comprising: a light source comprising a VCSEL controllable to illuminate the scene with a train of pulses of light having a characteristic spectrum; a photosurface; optics for imaging light reflected from the light pulses by the scene on the photosurface; and a shutter operable to gate the photosurface selectively on and off for light in the spectrum.

主权项

1. A camera for determining distances to objects in a three-dimensional (3D) scene, the camera comprising:
a light source controllable to illuminate the 3D scene with trains of pulses of light, the light source having a predetermined operating temperature range and a characteristic spectrum that shifts with temperature; a photosurface; optics for imaging light reflected from the trains of light pulses by the objects in the 3D scene on the photosurface; and a shutter operable to gate the photosurface selectively on and off to capture the imaged light, wherein the shutter has a contrast ratio (CR) that is matched over the operating temperature range of the light source with the temperature shifted characteristic spectrum of the light source so that light from the light source is at wavelengths in a peaking portion of an operating band of the shutter over the operating temperature range of the light source.