LC Selectable Bandwidth Tunable Optical Filter

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LC Selectable Bandwidth Tunable Optical Filter

  • Visible spectrum tuning range
  • Slectable bandwidth FWHM
  • 1/4" - 20, C-mount threads
  • Turnkey system included
  • Multiple control interface options

By utilizing multiple liquid crystal variable retarders and polarizers, this tunable filter allows the user to switch between any wavelength from 420 to 730 nm. In addition to the tunability of wavelength, this filter also allows the user a choice of three different bandwidth sizes at each wavelength. Selecting a wider bandwidth, one can increase the overall transmission of broadband light whereas the narrow FWHM can pass only a few wavelengths from a broadband light source.
All tunable optical filters from Meadowlark Optics come with three components: the optical head, the controller, and the software necessary to run the tunable optical filter. This software can be installed and run on any Windows based PC through either the USB or serial port while using the provided FilterDRIVE software or commands in C++, MatLab or LabVIEW.


Specifications - Selectable Bandwidth Tunable Optical Filter
Wavelength Range 420-730 nm
Typical FWHM at 550 nm *
12 nm
24 nm
39 nm
Polarized Peak Transmission 5-50%
Tuning Resolution 0.1 nm
Tuning Accuracy FWHM/10
Field of View (Half Cone Angle) ±6°
Switching Speed
Long to Short Wavelengths
Short to Long Wavelengths
<100 ms
< 500 ms
Temperature 10˚C to 35˚C
Out-of-Band Blocking (Average) > OD2
Total System Weight 4 lbs.
Minimum System Requirements
PC with Windows™
USB or RS232 COM Port           
Use of LabVIEW™ Instrument Library requires LabVIEW version 6.1 or higher
FWHM is dependent on wavelength.
Transmission is dependent on wavelength.
Custom versions are available. Please contact our Sales Department to
obtain a price quote or your Sales Engineer for technical assistance.


Ordering Information -Tunable Optical Filter
Item Part Number
Selectable Bandwidth TOF-SV
Optical head, controller and software included.
Please contact your Meadowlark Optics sales engineer