Absorbing Glass Optical Filters

Schott glass filters contain colored substances that absorb light energy in certain regions of the spectra. Filters fit easily into our light sources, cuvette holders and in-line or direct-attach filter holders. Filters can also be installed into our spectrometers.

Ocean Optics offers three filter types.

• High-pass Filters are transmissive approximately 50% at the nominal cutoff wavelength, >99% at wavelengths 50 nm higher than the cutoff, and less than 0.1% at 50 nm lower than the cutoff. High-pass filters are used to block second orders, test for stray light, and block excitation energy in fluorescence or Raman experiments.

• Balancing Filters absorb energy in some regions while transmitting in others. The BG34 filter, for example, reduces the intensity of light at 600 nm from a tungsten halogen bulb while transmitting all of the light at the blue and red regions, where detector sensitivity is lower.

• Bandpass Filters transmit a particular wavelength range while rejecting energies higher and lower than the selected range.

High-pass Filters

OF2-WG305	pass >305 nm	square 25.4 x 25.4 x 3 mm	$104
OF2-GG375	pass >375 nm	square 25.4 x 25.4 x 3 mm	$115
OF2-GG395	pass >395 nm	square 25.4 x 25.4 x 3 mm	$115
OF2-GG475	pass >475 nm	square 50.8 x 50.8 x 3 mm or square 25.4 x 25.4 x 3 mm	$165
OF2-OG515	pass >515 nm	square 25.4 x 25.4 x 3 mm	$115
OF2-OG550	pass >550 nm	square 25.4 x 25.4 x 3 mm	$115

Balancing Filters 

OF2-FG3	enhance blue and red	square 25.4 x 25.4 x 3 mm	$115
OF2-BG34R	enhance blue and red	round 12.7 mm OD	$92

Bandpass Filters 

OF2-KG3	>325 nm and <700 nm	square 25.4 x 25.4 x 3 mm	$115
OF2-U360	>340 nm and <380 nm	square 25.4 x 25.4 x 3 mm	$150
OF2-RG780	>780 nm and 50%  transmission <2.7 µm	square 25.4 x 25.4 x 3 mm	$160

Filter Kit for use with LS-1 Light Source 

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Optical Filters (Installed)

FHS-UV In-line Filter Holder

USB-FHS Filter Holder