Broadband OEM spectrometer

The new JETI broadband OEM spectrometer DE50 is a flat field spectrograph combined with powerful processing electronics. It is available in two versions: DE50 basic and DE50 expert.

The spectrometer can be operated with the intuitive measuring software JETI VersaSpec.

Main characteristics of DE50

  • Wavelength range 200 ... 1050 nm (DE50 expert)
  • Wavelength range  350 ... 1050 nm (DE50 basic)
  • High optical resolution over the whole spectral range
  • High sensitivity in UV, Vis and NIR spectral ranges
  • High dynamic range
  • Compact design
  • Easy integration into customer systems
  • Available with and without mechanical shutter
Broadband OEM spectrometer JETI DE50
Broadband OEM spectrometer JETI DE50


  • Ellipsometry
  • Plasma physics
  • Colorimetry/ Spectroradiometry
  • Biochemistry
  • Analytical instrumentation
  • Thickness measurement
  • Online analyzer
  • Fluorescence spectroscopy
  • In process measurement of interference layers

Controller functions

  • Internal storage of wavelength-pixel relation
  • Preprocessing of data, dark signal correction, absolute calibration
  • Internal calculations like averaging, interpolation, transmission, reflexion, absorption, color coordinates
  • Dedicated control syntax (SCPI compliant)


  • Very low astigmatism
  • Low stray light
  • Processing of spectral calculations
  • Onboard Ethernet Interface (DE50 expert)
  • Hard- and software trigger


Optical parameters

  • Spectral range 200 … 1050 nm  (DE50 expert),
    350 ... 1050 nm (DE50 basic)
  • Optical resolution < 4 nm FWHM (50 µm slit),
    optionally: better 2 nm (20 μm slit), other slit sizes on request
  • Max. wavelength error ± 0.3 nm (HgAr line source)
  • Stray light < 0.1 % (ASTM E387, GG495, λ = 420 nm/ 600 nm)

Optical input

  • F-SMA connector for 200 µm fiber

More parameters can be found in the datasheet


Fiber optic cable
Fiber Optic Cable (core diameter 200 µm, both sides terminated by SMA connectors) is available for all JETI spectrometers. The normal flexible cable has a length of 1 m (sma 200/1). Additionally, a nonflexible version with a length of 10 cm (sma-sma 200) is offered.

Fiber coupled diffusor (ACC 028)
The optical fibers can be combined with a fiber coupled diffusor to convert the spectrometers into Irradiance meters. A suited calibration is optionally available.

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