GVD-120 / GVD-120PCIE

Scan Controller Card for 2 Lasers

  • Scan Controller for Galvanometer and Piezo Scanners
  • Scan Waveforms Generated Purely by Hardware
  • No Software Interaction Required During Scan
  • Differential Output Voltage X+/X-, Y+/Y-
  • Standard Output Voltage Range +/- 2.5 V
  • Maximum Output Voltage Range +/- 10 V
  • Linear-Ramp or Sinusoidal Scan Modes
  • Fast-Preview Mode
  • Single-Point Mode
  • Variable Scan Speed and Scan Amplitude
  • Fast Scan due to Cycloid Flyback Characteristics
  • Pixel Times Down to 0.6 Microseconds
  • Control of Two Lasers Integrated
  • Laser Intensity Control, Beam Blanking
  • Laser ON/OFF Control
  • Laser Multiplexing
  • Simultaneous FLIM/PLIM Operation
  • Integrated in bh SPCM Instrument Software
  • PCI and PCIe Versions Available
  • Software for Windows 10/11
  • Part of bh DCS-120 Series FLIM Systems


The GVD-120 card generates the x and y deflection signals for galvanometer scanners and piezo scan stages. The x-y signals are generated by the hardware of the GVD module, the software is only used to load different waveforms or scan parameters in the scan controller. The waveforms are therefore independent of the computer speed and of software reaction times. The DCS-120 uses a cycloid trajectory for the fly-back of the scanner. This minimises mechanical resonances and thus allows the scanner to be operated at high scan rates. The GVD-120 also generates the scan synchronisation pulses for bh TCSPC modules, and the beam blanking, multiplexing, and intensity control signals for two bh BDL-SMN, or BDS-SM ps diode lasers. The control of the GVD card is fully integrated in the SPCM software of the bh TCSPC systems. The GVD Software panel is shown in the figure below.



The bh TCSPC Handbook
10th edition, September 2023


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