Linear Variable Filters


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Linear Variable Filters (LVFs) from Ocean Optics are handy tools for any optical experiment where high-pass, low-pass or bandpass filters are required. The filters are epoxied into slide carriers so you can move the transmission or blocking band through each filter’s wavelength range. LVFs are available with accessories for mounting the filters in-line or adapting them to the filter slot of CUV-ALL-UV cuvette holders.

LVFs are available in single and double filter versions, have excellent transmission (~90%) and blocking (99.8%) bands and are optimized for 230-500 nm or 300-750 nm wavelength ranges. LVFs are especially useful for spectrally shaping the excitation energy from broadband sources used for fluorescence.

  • Versatile – can be used for high-pass, low-pass and variable bandpass filtering
  • Applications – block excitation energy in fluorescence setups or reduce stray light in absorbance setups
  • Adaptable – accessories for use with cuvette or filter holders
Item Filter Type Wavelength Range
LVF-H Single high-pass 300-750 nm
LVF-HH Double high-pass 300-750 nm
LVF-HL Adjustable bandpass 300-750 nm
LVF-KIT Kit comprising adjustable bandpass filter and accessories 300-750 nm
LVF-L Single low-pass 300-750 nm
LVF-LL Double low-pass 300-750 nm
LVF-UV-H Single high-pass 230-500 nm
LVF-UV-HH Double high-pass 230-500 nm
LVF-UV-HL Adjustable bandpass 230-500 nm
LVF-UV-KIT Kit comprising adjustable bandpass filter and accessories 230-500 nm
LVF-UV-L Single low-pass 230-500 nm
LVF-UV-LL Double low-pass 230-500 nm

LVF accessories and adapters for use with cuvette and filters are also available.

Engineering Specifications Linear Variable Filters
Filter dimensions: 57 mm x 10 mm
Filter material: Interference coating on quartz substrate
Filter types: High-pass, low-pass and variable bandpass
Filter ranges: 300-750 nm (LVF series)230-500 nm (LVF-UV series)
Single filter transmission bands: ~90%
Single filter blocking bands: ~98.8%
Double filter transmission bands: ~80%
Double filter blocking bands: ~99.96%
Transmission bandwidth (variable bandpass filters): Preset at ~25 nm; adjustable by sliding filters within the carrier

Applications in which this product is used:

Measurement Techniques in which this product is used:

LVF-H High Pass Filter spectra LVF-HL Variable Bandwidth Filter spectra