Thorlabs ECU1 - PMT

The Thorlabs ECU a is controller box which is used as part of the BScope. The ECU1 is capable of controlling a resonant-galvo scanhead, and 2 PMTs

Hardware Configuration

Use either of the below diagrams to make all the applicable connections depending on DAQ equipment.

../../_images/vDAQThorECU1.png ../../_images/ThorlabsECUWiring.png

Software Config

In ScanImage, open the Resource configuration window from the startup dialog or from the Main Controls window under File>Configuration.

  1. From the Resource Configuration window, click the “+” button. Select Thorlabs from the sidebar, and select Thorlabs ECU1 from the device list. Give it a name and continue.

  2. A window like shown to the right should appear. Below is a description of each of the configuration parameters


COM Port

The COM port that is being used to connect the ECU to the PC


Use windows device manager to determine the COM port by (while the ECU is switched off) unplugging and re-plugging the USB cable the port should appear under Ports (COM and LPT)

DAQ Board

The DAQ board which has been configured to control the scanhead

Enable PMT Control

Enable this checkbox to control a PMT which has been connected according to the diagram in the hardware configuration section of this page.

Show vDAQ wiring diagram

Press this button to see the vDAQ wiring diagram using a Thorlabs ECU

Two additional devices are added when adding the ECU device - [user entered name] X-Res Scanner and [user entered name] Y-Res Scanner.


Nominal Frequency

This is the frequency that the resonant scanner is expected to oscillate at.

Angular range [optical degrees]

This is the maximum range of the resonant scanner in optical degrees

Settle Time [s]

This is the time that ScanImage® will wait after beginning an acquisition to start acquiring fluorescence data.


Control Channel

The analog output channel used to control the deflection angle of the beam

Volts per optical degree

The scaling factor between control channel signal voltage and Y-Galvo beam deflection

Angular range [optical degrees]

The change in angle of the beam from one extent of the galvo’s travel to the other

Park position [optical degrees]

The Y-axis position component of the beam’s parked position.

Slew rate limit [Volts/second]

The rate at which the control channel’s signal voltage is allowed to change.

Feedback Channel (optional)

The analog input channel used to receive the analog galvo position feedback signal for calibration and optimization.