IR-AOS detects spectral characteristics of optical radiation of infra-red range. It can be used in measurements based on emission spectroscopy and absorption differential spectroscopy.
- Out-of-door measurements: atmosphere gas analysis, express-analysis.
- Industrial applications: quality testing, plastics identification.
- Laboratory investigations: scientific researches, spectral analysis, spectral identification algorithms development, spectral data base accumulation.
- 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.
- Spectral range 2.1 – 4.4 mcm
- Bandwidth 10 nm at 3.39 mcm (9 cm-1)
- Aperture 2°* 2° 12* 12 mm
- Sizes:control unit 24.5*12*21.5 cm3 4 kg
- optical head 36*14*6 cm3 2 kg
- Temperature interval 3¸35°C
The basic part of spectrometer is a monochromator comprising a pair of acousto-optic tunable filters. Each filter contains a TeO2 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 and the wavefront of a certain spectral component of incident radiation and a system of diaphragms separates it. As the wavelength of selected spectral component is defined by the grating period, the acousto-optic filter is tuned by varying the frequency of the signal supplied to the acoustic source. Due to polarization principle of separation used by acousto-optic filters, only one polarization component of incident radiation (horizontal) is detected.
Acousto-optic spectrometer consists of small-size optic head and control unit based on Compact PC system box. The spectrometer is programmable and allow short-time random spectral access. Spectrometer can be controlled from any IBM-compatible computer via serial port. Device can be used as a separate computer-controlled instrument.