Square Bandpass Filters

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Overview

Our 2 x 2 in. square bandpass filters pass a narrow spectral band of UV, visible, or NIR radiation and reject out-of-band wavelengths from X-ray to the far IR. Applications include spectra radiometry, medical diagnostics, chemical analysis, colorimetry, astronomy, or any application where spectral isolation is required.

Out-of-band blocking to less than 0.01% (10-4)
Center wavelengths available from 310 nm to 900 nm
50.8 x 50.8 mm square shape
Superior lifetime in harsh environmental conditions
Excellent temperature stability

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Products

Compare	Model	Compatibility	rankScore	Center Wavelength	FWHM	Minimum Peak Transmission	Availability	Price	Brand
20BPF10-340 Bandpass Filter, 50.8x50.8 mm, 340±2 nm Center, 12±2 nm FWHM $847 In Stock	20BPF10-340 Bandpass Filter, 50.8x50.8 mm, 340±2 nm Center, 12±2 nm FWHM	UNIVERSAL	1.0	340 nm	12±2 nm	35%	In Stock	$847	Newport
20BPF10-350 Bandpass Filter, 50.8x50.8 mm, 350±2 nm Center, 11±2 nm FWHM $847 In Stock	20BPF10-350 Bandpass Filter, 50.8x50.8 mm, 350±2 nm Center, 11±2 nm FWHM	UNIVERSAL	1.0	350 nm	11±2 nm	30%	In Stock	$847	Newport
20BPF10-360 Bandpass Filter, 50.8x50.8 mm, 360±2 nm Center, 11±2 nm FWHM $847 In Stock	20BPF10-360 Bandpass Filter, 50.8x50.8 mm, 360±2 nm Center, 11±2 nm FWHM	UNIVERSAL	1.0	360 nm	11±2 nm	30%	In Stock	$847	Newport
20BPF10-370 Bandpass Filter, 50.8x50.8 mm, 370±2 nm Center, 12±2 nm FWHM $847 4 Weeks	20BPF10-370 Bandpass Filter, 50.8x50.8 mm, 370±2 nm Center, 12±2 nm FWHM	UNIVERSAL	1.0	370 nm	12±2 nm	30%	4 Weeks	$847	Newport
20BPF10-380 Bandpass Filter, 50.8x50.8 mm, 380±2 nm Center, 12±2 nm FWHM $847 In Stock	20BPF10-380 Bandpass Filter, 50.8x50.8 mm, 380±2 nm Center, 12±2 nm FWHM	UNIVERSAL	1.0	380 nm	12±2 nm	30%	In Stock	$847	Newport
20BPF10-390 Bandpass Filter, 50.8x50.8 mm, 390±2 nm Center, 12±2 nm FWHM $847 4 Weeks	20BPF10-390 Bandpass Filter, 50.8x50.8 mm, 390±2 nm Center, 12±2 nm FWHM	UNIVERSAL	1.0	390 nm	12±2 nm	30%	4 Weeks	$847	Newport
20BPF10-400 Bandpass Filter, 50.8x50.8 mm, 400±2 nm Center, 10±2 nm FWHM $463 4 Weeks	20BPF10-400 Bandpass Filter, 50.8x50.8 mm, 400±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	400 nm	10±2 nm	30%	4 Weeks	$463	Newport
20BPF10-410 Bandpass Filter, 50.8x50.8 mm, 410±2 nm Center, 10±2 nm FWHM $463 4 Weeks	20BPF10-410 Bandpass Filter, 50.8x50.8 mm, 410±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	410 nm	10±2 nm	45%	4 Weeks	$463	Newport
20BPF10-420 Bandpass Filter, 50.8x50.8 mm, 420±2 nm Center, 10±2 nm FWHM $463 In Stock	20BPF10-420 Bandpass Filter, 50.8x50.8 mm, 420±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	420 nm	10±2 nm	45%	In Stock	$463	Newport
20BPF10-430 Bandpass Filter, 50.8x50.8 mm, 430±2 nm Center, 10±2 nm FWHM $468 In Stock	20BPF10-430 Bandpass Filter, 50.8x50.8 mm, 430±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	430 nm	10±2 nm	45%	In Stock	$468	Newport
20BPF10-440 Bandpass Filter, 50.8x50.8 mm, 440±2 nm Center, 10±2 nm FWHM $463 In Stock	20BPF10-440 Bandpass Filter, 50.8x50.8 mm, 440±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	440 nm	10±2 nm	45%	In Stock	$463	Newport
20BPF10-450 Bandpass Filter, 50.8x50.8 mm, 450±2 nm Center, 10±2 nm FWHM $463 In Stock	20BPF10-450 Bandpass Filter, 50.8x50.8 mm, 450±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	450 nm	10±2 nm	45%	In Stock	$463	Newport
20BPF10-460 Bandpass Filter, 50.8x50.8 mm, 460±2 nm Center, 10±2 nm FWHM $438 In Stock	20BPF10-460 Bandpass Filter, 50.8x50.8 mm, 460±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	460 nm	10±2 nm	50%	In Stock	$438	Newport
20BPF10-470 Bandpass Filter, 50.8x50.8 mm, 470±2 nm Center, 10±2 nm FWHM $439 7 Weeks	20BPF10-470 Bandpass Filter, 50.8x50.8 mm, 470±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	470 nm	10±2 nm	50%	7 Weeks	$439	Newport
20BPF10-480 Bandpass Filter, 50.8x50.8 mm, 480±2 nm Center, 10±2 nm FWHM $438 7 Weeks	20BPF10-480 Bandpass Filter, 50.8x50.8 mm, 480±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	480 nm	10±2 nm	50%	7 Weeks	$438	Newport
20BPF10-490 Bandpass Filter, 50.8x50.8 mm, 490±2 nm Center, 10±2 nm FWHM $438 7 Weeks	20BPF10-490 Bandpass Filter, 50.8x50.8 mm, 490±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	490 nm	10±2 nm	50%	7 Weeks	$438	Newport
20BPF10-500 Bandpass Filter, 50.8x50.8 mm, 500±2 nm Center, 10±2 nm FWHM $438 In Stock	20BPF10-500 Bandpass Filter, 50.8x50.8 mm, 500±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	500 nm	10±2 nm	50%	In Stock	$438	Newport
20BPF10-510 Bandpass Filter, 50.8x50.8 mm, 510±2 nm Center, 10±2 nm FWHM $438 7 Weeks	20BPF10-510 Bandpass Filter, 50.8x50.8 mm, 510±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	510 nm	10±2 nm	50%	7 Weeks	$438	Newport
20BPF10-520 Bandpass Filter, 50.8x50.8 mm, 520±2 nm Center, 10±2 nm FWHM $440 In Stock	20BPF10-520 Bandpass Filter, 50.8x50.8 mm, 520±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	520 nm	10±2 nm	50%	In Stock	$440	Newport
20BPF10-530 Bandpass Filter, 50.8x50.8 mm, 530±2 nm Center, 10±2 nm FWHM $438 In Stock	20BPF10-530 Bandpass Filter, 50.8x50.8 mm, 530±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	530 nm	10±2 nm	50%	In Stock	$438	Newport
20BPF10-540 Bandpass Filter, 50.8x50.8 mm, 540±2 nm Center, 10±2 nm FWHM $415 7 Weeks	20BPF10-540 Bandpass Filter, 50.8x50.8 mm, 540±2 nm Center, 10±2 nm FWHM	UNIVERSAL	1.0	540 nm	10±2 nm	50%	7 Weeks	$415	Newport
20BPF10-550 Bandpass Filter, 50.8x50.8 mm, 550±2 nm, 10±2 nm FWHM $438 In Stock	20BPF10-550 Bandpass Filter, 50.8x50.8 mm, 550±2 nm, 10±2 nm FWHM	UNIVERSAL	1.0	550 nm	10±2 nm	50%	In Stock	$438	Newport
20BPF10-560 Bandpass Filter, 50.8x50.8 mm, 560±2 nm, 10±2 nm FWHM $438 In Stock	20BPF10-560 Bandpass Filter, 50.8x50.8 mm, 560±2 nm, 10±2 nm FWHM	UNIVERSAL	1.0	560 nm	10±2 nm	50%	In Stock	$438	Newport
20BPF10-570 Bandpass Filter, 50.8x50.8 mm, 570±2 nm, 10±2 nm FWHM $438 7 Weeks	20BPF10-570 Bandpass Filter, 50.8x50.8 mm, 570±2 nm, 10±2 nm FWHM	UNIVERSAL	1.0	570 nm	10±2 nm	50%	7 Weeks	$438	Newport
20BPF10-580 Bandpass Filter, 50.8x50.8 mm, 580±2 nm, 10±2 nm FWHM $438 7 Weeks	20BPF10-580 Bandpass Filter, 50.8x50.8 mm, 580±2 nm, 10±2 nm FWHM	UNIVERSAL	1.0	580 nm	10±2 nm	50%	7 Weeks	$438	Newport
20BPF10-590 Bandpass Filter, 50.8x50.8 mm, 590±2 nm, 10±2 nm FWHM $438 7 Weeks	20BPF10-590 Bandpass Filter, 50.8x50.8 mm, 590±2 nm, 10±2 nm FWHM	UNIVERSAL	1.0	590 nm	10±2 nm	50%	7 Weeks	$438	Newport
20BPF10-600 Bandpass Filter, 50.8x50.8 mm, 600±2 nm, 10±2 nm FWHM $438 In Stock	20BPF10-600 Bandpass Filter, 50.8x50.8 mm, 600±2 nm, 10±2 nm FWHM	UNIVERSAL	1.0	600 nm	10±2 nm	50%	In Stock	$438	Newport
20BPF10-610 Bandpass Filter, 50.8x50.8 mm, 610±2 nm, 10±2 nm FWHM $433 In Stock	20BPF10-610 Bandpass Filter, 50.8x50.8 mm, 610±2 nm, 10±2 nm FWHM	UNIVERSAL	1.0	610 nm	10±2 nm	50%	In Stock	$433	Newport
20BPF10-620 Bandpass Filter, 50.8x50.8 mm, 620±2 nm, 10±2 nm FWHM $439 In Stock	20BPF10-620 Bandpass Filter, 50.8x50.8 mm, 620±2 nm, 10±2 nm FWHM	UNIVERSAL	1.0	620 nm	10±2 nm	50%	In Stock	$439	Newport
20BPF10-630 Bandpass Filter, 50.8x50.8 mm, 630±2 nm, 10±2 nm FWHM $433 In Stock	20BPF10-630 Bandpass Filter, 50.8x50.8 mm, 630±2 nm, 10±2 nm FWHM	UNIVERSAL	1.0	630 nm	10±2 nm	50%	In Stock	$433	Newport
20BPF10-640 Bandpass Filter, 50.8x50.8 mm, 640±2 nm, 10±2 nm FWHM $438 In Stock	20BPF10-640 Bandpass Filter, 50.8x50.8 mm, 640±2 nm, 10±2 nm FWHM	UNIVERSAL	1.0	640 nm	10±2 nm	50%	In Stock	$438	Newport
20BPF10-650 Bandpass Filter, 50.8x50.8 mm, 650±2 nm, 10±2 nm FWHM $438 In Stock	20BPF10-650 Bandpass Filter, 50.8x50.8 mm, 650±2 nm, 10±2 nm FWHM	UNIVERSAL	1.0	650 nm	10±2 nm	50%	In Stock	$438	Newport
20BPF10-660 Bandpass Filter, 50.8x50.8 mm, 660±2 nm, 11±2 nm FWHM $438 In Stock	20BPF10-660 Bandpass Filter, 50.8x50.8 mm, 660±2 nm, 11±2 nm FWHM	UNIVERSAL	1.0	660 nm	11±2 nm	50%	In Stock	$438	Newport
20BPF10-670 Bandpass Filter, 50.8x50.8 mm, 670±2 nm, 11±2 nm FWHM $438 7 Weeks	20BPF10-670 Bandpass Filter, 50.8x50.8 mm, 670±2 nm, 11±2 nm FWHM	UNIVERSAL	1.0	670 nm	11±2 nm	50%	7 Weeks	$438	Newport
20BPF10-680 Bandpass Filter, 50.8x50.8 mm, 680±2 nm, 11±2 nm FWHM $438 In Stock	20BPF10-680 Bandpass Filter, 50.8x50.8 mm, 680±2 nm, 11±2 nm FWHM	UNIVERSAL	1.0	680 nm	11±2 nm	50%	In Stock	$438	Newport
20BPF10-690 Bandpass Filter, 50.8x50.8 mm, 690±2 nm, 11±2 nm FWHM $438 7 Weeks	20BPF10-690 Bandpass Filter, 50.8x50.8 mm, 690±2 nm, 11±2 nm FWHM	UNIVERSAL	1.0	690 nm	11±2 nm	50%	7 Weeks	$438	Newport
20BPF10-700 Bandpass Filter, 50.8x50.8 mm, 700±2 nm, 12±2 nm FWHM $438 In Stock	20BPF10-700 Bandpass Filter, 50.8x50.8 mm, 700±2 nm, 12±2 nm FWHM	UNIVERSAL	1.0	700 nm	12±2 nm	50%	In Stock	$438	Newport
20BPF10-750 Bandpass Filter, 50.8x50.8 mm, 750±2 nm, 13±2 nm FWHM $438 In Stock	20BPF10-750 Bandpass Filter, 50.8x50.8 mm, 750±2 nm, 13±2 nm FWHM	UNIVERSAL	1.0	750 nm	13±2 nm	50%	In Stock	$438	Newport
20BPF10-800 Bandpass Filter, 50.8x50.8 mm, 800±2 nm, 12±2 nm FWHM $438 In Stock	20BPF10-800 Bandpass Filter, 50.8x50.8 mm, 800±2 nm, 12±2 nm FWHM	UNIVERSAL	1.0	800 nm	12±2 nm	45%	In Stock	$438	Newport
20BPF10-850 Bandpass Filter, 50.8x50.8 mm, 850±2 nm, 13±2 nm FWHM $438 In Stock	20BPF10-850 Bandpass Filter, 50.8x50.8 mm, 850±2 nm, 13±2 nm FWHM	UNIVERSAL	1.0	850 nm	13±2 nm	45%	In Stock	$438	Newport
20BPF10-900 Bandpass Filter, 50.8x50.8 mm, 900±2 nm, 10±2 nm FWHM $438 In Stock	20BPF10-900 Bandpass Filter, 50.8x50.8 mm, 900±2 nm, 10±2 nm FWHM	UNIVERSAL	1.0	900 nm	10±2 nm	45%	In Stock	$438	Newport
20BPF25-400 Bandpass Filter, 50.8x50.8 mm, 400±3.5 nm, 25±3.5 nm FWHM $462 In Stock	20BPF25-400 Bandpass Filter, 50.8x50.8 mm, 400±3.5 nm, 25±3.5 nm FWHM	UNIVERSAL	1.0	400 nm	25±3.5 nm	35%	In Stock	$462	Newport
20BPF25-450 Bandpass Filter, 50.8x50.8 mm, 450±3.5 nm, 25±3.5 nm FWHM $484 4 Weeks	20BPF25-450 Bandpass Filter, 50.8x50.8 mm, 450±3.5 nm, 25±3.5 nm FWHM	UNIVERSAL	1.0	450 nm	25±3.5 nm	45%	4 Weeks	$484	Newport
20BPF25-500 Bandpass Filter, 50.8x50.8 mm, 500±3.5 nm, 25±3.5 nm FWHM $458 In Stock	20BPF25-500 Bandpass Filter, 50.8x50.8 mm, 500±3.5 nm, 25±3.5 nm FWHM	UNIVERSAL	1.0	500 nm	25±3.5 nm	50%	In Stock	$458	Newport
20BPF25-550 Bandpass Filter, 50.8x50.8 mm, 550±3.5 nm, 25±3.5 nm FWHM $466 In Stock	20BPF25-550 Bandpass Filter, 50.8x50.8 mm, 550±3.5 nm, 25±3.5 nm FWHM	UNIVERSAL	1.0	550 nm	25±3.5 nm	50%	In Stock	$466	Newport
20BPF25-600 Bandpass Filter, 50.8x50.8 mm, 600±3.5 nm, 25±3.5 nm FWHM $458 In Stock	20BPF25-600 Bandpass Filter, 50.8x50.8 mm, 600±3.5 nm, 25±3.5 nm FWHM	UNIVERSAL	1.0	600 nm	25±3.5 nm	50%	In Stock	$458	Newport
20BPF25-650 Bandpass Filter, 50.8x50.8 mm, 650±3.5 nm, 25±3.5 nm FWHM $438 7 Weeks	20BPF25-650 Bandpass Filter, 50.8x50.8 mm, 650±3.5 nm, 25±3.5 nm FWHM	UNIVERSAL	1.0	650 nm	25±3.5 nm	50%	7 Weeks	$438	Newport
20BPF25-700 Bandpass Filter, 50.8x50.8 mm, 700±3.5 nm, 25±3.5 nm FWHM $466 In Stock	20BPF25-700 Bandpass Filter, 50.8x50.8 mm, 700±3.5 nm, 25±3.5 nm FWHM	UNIVERSAL	1.0	700 nm	25±3.5 nm	50%	In Stock	$466	Newport
20BPF25-750 Bandpass Filter, 50.8x50.8 mm, 750±3.5 nm, 25±3.5 nm FWHM $438 7 Weeks	20BPF25-750 Bandpass Filter, 50.8x50.8 mm, 750±3.5 nm, 25±3.5 nm FWHM	UNIVERSAL	1.0	750 nm	25±3.5 nm	50%	7 Weeks	$438	Newport
20BPF70-400 Bandpass Filter, 50.8x50.8 mm, 400±10 nm, 70±30 nm FWHM $361 In Stock	20BPF70-400 Bandpass Filter, 50.8x50.8 mm, 400±10 nm, 70±30 nm FWHM	UNIVERSAL	1.0	400 nm	70±30 nm	60%	In Stock	$361	Newport
20BPF70-450 Bandpass Filter, 50.8x50.8 mm, 450±10 nm, 70±30 nm FWHM $360 7 Weeks	20BPF70-450 Bandpass Filter, 50.8x50.8 mm, 450±10 nm, 70±30 nm FWHM	UNIVERSAL	1.0	450 nm	70±30 nm	60%	7 Weeks	$360	Newport
20BPF70-500 Bandpass Filter, 50.8x50.8 mm, 500±10 nm, 70±30 nm FWHM $360 In Stock	20BPF70-500 Bandpass Filter, 50.8x50.8 mm, 500±10 nm, 70±30 nm FWHM	UNIVERSAL	1.0	500 nm	70±30 nm	60%	In Stock	$360	Newport
20BPF70-550 Bandpass Filter, 50.8x50.8 mm, 550±10 nm, 70±30 nm FWHM $360 In Stock	20BPF70-550 Bandpass Filter, 50.8x50.8 mm, 550±10 nm, 70±30 nm FWHM	UNIVERSAL	1.0	550 nm	70±30 nm	60%	In Stock	$360	Newport
20BPF70-600 Bandpass Filter, 50.8x50.8 mm, 600±10 nm, 70±30 nm FWHM $360 7 Weeks	20BPF70-600 Bandpass Filter, 50.8x50.8 mm, 600±10 nm, 70±30 nm FWHM	UNIVERSAL	1.0	600 nm	70±30 nm	60%	7 Weeks	$360	Newport
20BPF70-650 Bandpass Filter, 50.8x50.8 mm, 650±10 nm, 70±30 nm FWHM $360 In Stock	20BPF70-650 Bandpass Filter, 50.8x50.8 mm, 650±10 nm, 70±30 nm FWHM	UNIVERSAL	1.0	650 nm	70±30 nm	60%	In Stock	$360	Newport
20BPF70-700 Bandpass Filter, 50.8x50.8 mm, 700±10 nm, 70±30 nm FWHM $360 7 Weeks	20BPF70-700 Bandpass Filter, 50.8x50.8 mm, 700±10 nm, 70±30 nm FWHM	UNIVERSAL	1.0	700 nm	70±30 nm	60%	7 Weeks	$360	Newport
20BPF70-750 Bandpass Filter, 50.8x50.8 mm, 750±10 nm, 70±30 nm FWHM $360 In Stock	20BPF70-750 Bandpass Filter, 50.8x50.8 mm, 750±10 nm, 70±30 nm FWHM	UNIVERSAL	1.0	750 nm	70±30 nm	60%	In Stock	$360	Newport

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Specifications

Type

Bandpass Filter
Size

50.8 x 50.8 mm
Surface Quality

80-50 scratch-dig

Temperature Range

-50 to 100°C
Wavelength Shift with Temperature

0.01 to 0.02 nm/°C
Humidity Resistance

Per MIL-STD-810E, method 507.3, procedure III, modified to 5 cycles

Specifications

Type

Bandpass Filter
Size

50.8 x 50.8 mm
Surface Quality

80-50 scratch-dig

Temperature Range

-50 to 100°C
Wavelength Shift with Temperature

0.01 to 0.02 nm/°C
Humidity Resistance

Per MIL-STD-810E, method 507.3, procedure III, modified to 5 cycles

Features

Scribed and Laminated Construction

Scribed and laminated soft coating construction is a commonly used construction for bandpass and edge filters. Optical filter components are coated onto separate substrate plates. These plates are then scribed to remove the film symmetrically around the required specified active film areas of the optical filters to be produced from the plate. The scribed plates are subsequently laminated together with a moisture resistant epoxy. A glass-epoxy-glass seal is formed in the scribed areas forming the best possible barrier to moisture penetration. Filters are cut through the scribed area to their finished size using diamond cutting tools. Additional moisture barriers may be applied to the cut filters if necessary to achieve extended life requirements.

Bandpass Filter Transmission Curves

A bandpass filter is defined by the pass band region. The two wavelengths in the bandpass where the transmittance is equal to 50% of peak transmittance are called the half-power wavelengths. The bandwidth is the difference between the half-power wavelengths which is called the full width at half maximum (FWHM). A center wavelength is defined by calculating the average of the two half-power wavelengths. The band shape is usually defined as a multiple of the BW or FWHM, and it defines the rate of attenuation with respect to wavelength change along the slopes of the bandpass. Please see the individual product page for the transmission curve.