|780nm IR Laser Diode pulsed at ~20.2Hz|
Sony NoIR 8mp Camera Module for Raspberry Pi 3
Several different methods of pulsing the GPIO pins were tested; memory mapped IO where the physical ARM peripheral base addresses were mapped into Linux user space via virtual addressing, C and python user space programs that link against user space dynamically linked libraries which in turn read and write the ARM peripheral address space to toggle the GPIO pins, a device driver that disables interrupts and writes to the underlying ARM peripheral address space after being called from a syscall in user space, and bare metal C code that directly writes to the ARM peripheral address space.
These images were shot using the Sony NoIR 8mp Camera module for the Raspberry Pi 3.
|850nm IR Laser Continuous Wave|
Sony NoIR 8mp Camera Module