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AFM VistaScope - Technical Details

The VistaScope is a multi-purpose scanning near-field microscope which combines high speed imaging with chemical identification.

Optics


Flexible Optical Configurations

A 20x objective (NA = 0.6) with a long working distance offers enough space for various and non-flat samples. Additionally, an inverted 100x immersion objective with a numerical aperture of 1.45 ensures an enormous light collection efficiency.
Parabolic Side Mirror

A parabolic mirror (NA = 0.9) provides efficient excitation and emission light collection from the tip. The mirror design ensures a single focus point for a wavelengths range from 350 nm to 10 m.
Customizable Optical Configuration

Optical ports in different heights provide customizable optical configuration and full access to excitation (illumination) and emission of the sample. The beam path is adjustable via a periscope. All parts and ports are fully compatible to Thorlabs 30 mm cage system and can simply be excanged or modified.

Scanning

Hardware/Amplification/Signal Processing

Advanced Controller

  • FPGA based - two dedicated DSPs
  • 2 independent inputs with > 500 MSa/s
  • 2 reference outputs with 160 MSa/s
  • Ultrafast dynamic mode feedback
  • Pixel rate: > 1 MHz
  • Multiple feedback modes - STM, Contact and Dynamic Mode AFM, and PLL
  • 4 independent 2-phase lock-in amplifiers
  • Q-factor enhancement
  • Thermal tune spring constant measurement
  • Bimodal (1st and 2nd resonance) operation
  • Flexible and powerful spectroscopy modes



  • Active Damping Table

    MVI's AFM on ultra-stable customized inverted optical microscope and active vibration isolation table (marked in yellow).