1. A camera for determining distances to a scene, the camera comprising: a light source comprising at least one vertical cavity surface emitting light emitting laser (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 wherein bias error resulting from a temperature difference between the light source and the shutter is less than about 10 percent of the displacement of an imaging slice of the scene.