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You are here:   » Products » Optical Technologies » Components » Optics » Acousto Optics » Acousto Optic Tunable Filters

Acousto Optics

Acousto Optic Tunable Filters

Key Features

  • High efficiency
  • Excellent pointing stability
  • Patented side-lobe suppression
  • High extinction ratio
  • Maintains beam quality


An acousto optic tunable filter is a pass-band transmission filter, which exploits the acousto optic interaction inside an anisotropic medium. Acousto optic tunable filters are generally fabricated in Tellurium Dioxide, operating within the visible to near/mid infra-red. The acousto optic tunable filter allows the user to select and transmit a single wavelength, or in some cases a selection of multiple discrete wavelengths from the incoming light. The centre of the pass-band may be selected simply by tuning the drive frequency.

Over a number of years Gooch & Housego has maintained an ambitious development program which has enabled to enhance the general performance and increase the capabilities of AOTF technology. The product range includes purpose designed solutions for illumination / excitation wavelength selection and multispectral / hyperspectral imaging, for which the company also offers the latest DFS driver technology.


  • Biomedical (confocal microscopy & hyperspectral imaging)
  • Scientific (spectroscopy)
  • Industrial (process control)