General control of the hardware in the microscope is performed using a NI-DAQ acquisition board (
PCIe-6353, National Instruments, Austin, TX, USA). All hardware equipment is controlled with microscope control software ImSwitch 13 written in Python. Control of the etSTED method is performed using a custom-written widget and controller in ImSwitch, available in GitHub (https://github.com/jonatanalvelid/ImSwitch-etSTED), that controls the lasers, image acquisition, and runs the real-time analysis pipeline with customizable parameters to adapt to sample-specific conditions.
Additionally, a focus lock that combines an infrared laser (
CP980S, Thorlabs, Newton, NJ, USA), a CMOS camera (
DMK 33UP1300, The Imaging Source Europe, Bremen, Germany), and the zpiezo through a feedback loop is coupled into the beam path just before the microscope stand. It is controlled with ImSwitch and allows for experiments to run without manual control for prolonged periods of time.
The PC used to control the complete microscope contains a Ryzen 7 3700X 8-core CPU (AMD, Santa Clara, CA, USA), and a GeForce RTX 3060 Ti TUF GAMING OC GPU (ASUS, Taipei, Taiwan).
Alvelid J., Damenti M., & Testa I. (2021). Event-triggered STED imaging.