Compact 16-element APD array suitable for various light level detection (parallel output) The S14137-01CR is a compact optical device that integrates a 16-element APD array and a preamp. The incident light pulse is converted into a voltage pulse, and then the converted pulse is output. It has a built-in DC feedback circuit for reducing the effects of background light. The parallel output 16-element array enables simultaneous measurement of all pixels.