Plasma & Gas density measurement


Key Features

UNRIVALLED HIGH RESOLUTION | 400×300 phase pixels

  • Ultra high resolution – 400×300 measurement points – for robust wavefront analysis
  • Achromaticity from 400 to 1100nm – without calibrating
  • Compact
  • Self-referenced: insensitive to vibrations & easy to align
  • Easy set-up: direct measurement of diverging and collimated beam
  • Achieves easy and accurate quantitative phase imaging



Wavelength range400 - 1100 nm
Aperture dimension8.9 x 11.8mm2
Spatial resolution29.6 µm
Phase & intensity sampling300 x 400 (> 120 000 points)
Resolution (Phase)< 2 nm RMS
Accuracy15 nm RMS
Acquisition rate> 10 fps
Real-time processing frequency> 3 fps (full resolution)
Computer connectionGiga Ethernet
Dimensions (w x h x l)54 x 46 x 79 mm
Weight~250 g

SID4 Density software


SID4 DENSITY software package supports the whole process to measure gas and plasma electron density. It calculates density maps from phase acquisition. It also offers various options for acquisition and data analysis.



ApplicationAny axisymmetric monoatomic gas jet/plasma for inverse-Abel transform analysis
Probe sourceWhite light (halogen), LED, laser or fs-laser
PressureFrom 2 to 300 bars
Plasma lengthDepends on the imaging system (typically 2 mm long and diameter of 0.2 mm)
AcquisitionReal Time, programmed, trigger
SettingsWavelength, magnification, jet direction, gas type
AnalysisDensity map & profiles, Symmetrization, filters

Performances such as the spatial resolution or the density resolution entirely depend on both the optical set-up (imaging system, probe source) and the injected gas (molar refractivity). Please contact us for an estimation of specifications for your set-up.
As an example, for an laser produced plasma using an Argon gas jet at working pressure between 2 and 300 bars, the lowest measured Argon density in a single shot is: 1017 particles/cm3 with a nozzle of 1.5 mm diameter.

Contact us to get those products