  We introduce pulsed correlation time-of-flight (PC-ToF) sensing, a new
operation mode for correlation time-of-flight range sensors that combines a
sub-nanosecond laser pulse source with a rectangular demodulation at the sensor
side. In contrast to previous work, our proposed measurement scheme attempts
not to optimize depth accuracy over the full measurement: With PC-ToF we trade
the global sensitivity of a standard C-ToF setup for measurements with strongly
localized high sensitivity -- we greatly enhance the depth resolution for the
acquisition of scene features around a desired depth of interest. Using
real-world experiments, we show that our technique is capable of achieving
depth resolutions down to 2mm using a modulation frequency as low as 10MHz and
an optical power as low as 1mW. This makes PC-ToF especially viable for
low-power applications.
