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Acousto-optical spectrometer for Ultra-Violet and Visible Range

UV-Vis-AOS detects spectral characteristics of optical radiation of ultra-violet and visible range. It can be used in measurements based on emission spectroscopy, fluorescence spectroscopy, Raman spectroscopy, absorption differential spectroscopy.

Application spheres:

  • Out-of-door measurements: environment monitoring, remote sensing, atmosphere gas analysis, express-analysis.
  • Industrial applications: technological processes control, quality testing.
  • Laboratory investigations: scientific researches, spectral analysis, spectral identification algorithms development, spectral data base accumulation.

Characteristic features:

  • Fast random spectral access.
  • Insensitivity to shocks, impacts, vibration.
  • Applicability to out-of-door environment.
  • Small overall dimensions, compact design of optical head.
  • High throughput combined with rather high spectral resolution.
  • Operation mode variability. Programmability. Background operation.

Technical characteristics:

  • Spectral range: 255 — 780 nm.
  • Bandwidth: 1,5 A at 325 nm (14 cm-1)
  • Aperture diameter 6 mm* 3°.
  • Sizes:
    • control unit  45*50*20 cm3  10 kg
    • optical head 25,5*18*10 cm3 3 kg
  • Temperature interval  3¸35°C

Brief description:

The basic part of spectrometer is an acousto-optical tunable filter. It contains a SiO2 crystal cell, in which a bulk periodic refractive structure is generated by ultrasound wave. The structure serves as a phase diffracting grating for incident radiation. The grating alters the polarization of a certain spectral component of incident radiation and a pair of crossed polarizers separate it. As the wavelength of selected spectral component is defined by the grating period, the acousto-optical filter is tuned by varying the frequency of the signal supplied to the acoustic source. Acousto-optical spectrometer consists of small-size optical head and control unit based on Industrial PC system box. A display, a keyboard and a mouse are attached to the control unit. The spectrometer is programmable and allow short-time random spectral access. Acousto-optical spectrometer operates in background mode so data analysis can be fulfilled just during measurement process. Device can be used as an independent instrument as well as be incorporated in the control systems.

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