Band-pass Filters | Optical Band-pass Filters | Filters

Optometrics

Bandpass Filters

A bandpass filter is a relatively inexpensive type of optical filter used as a wavelength selector that allows transmission of a predetermined wavelength while rejecting or blocking other wavelengths.

Applications for a bandpass filter include, but are not limited to:

Clinical chemistry instrumentation
Environmental testing
Colorimetry
Elemental and laser line separation
Flame photometry
Fluorescence
Immunoassays

Along with our wide selection of standard bandpass filters, we design and manufacture optimized solutions for instrument manufacturers world wide.

For more detailed technical information about bandpass filters, please click here.

Bandpass Filter Terminology

Product SKUs

Bandpass Filter Specifications | F-380-10-12.5

CWL	380 nm	CWL Tolerance	± 2 nm
FWHM	10 nm	FWHM Tolerance	± 2 nm
Minimum Peak Transmission	25	Blocking	≥ 4 OD
Blocking Range	X-ray – 1200 nm	Size (mm)	12.5 mm dia.
Size Tolerance	+0, -0.2 mm	Thickness	7.5 mm
Thickness Tolerance	+0, -0.2 mm	Clear Aperture	9.0 mm
Mount	Aluminum, Black Anodized	Ring Marking	CWL, FWHM, Light Direction
Specification Temperature	23˚ C	Humidity Resistance	MIL-810-810E, Method 507.3, 5 Cycles
Optical Quality	Commercial	CWL (Range)	300 – 399 nm

Bandpass Filter Specifications | F-380-10-25

CWL	380 nm	CWL Tolerance	± 2 nm
FWHM	10 nm	FWHM Tolerance	± 2 nm
Minimum Peak Transmission	25	Blocking	≥ 4 OD
Blocking Range	X-ray – 1200 nm	Size (mm)	25.0 mm dia.
Size Tolerance	+0, -0.1 mm	Thickness	7.5 mm
Thickness Tolerance	+0, -0.2 mm	Clear Aperture	21.0 mm
Mount	Aluminum, Black Anodized	Ring Marking	CWL, FWHM, Light Direction
Specification Temperature	23˚ C	Humidity Resistance	MIL-810-810E, Method 507.3, 5 Cycles
Optical Quality	Commercial	CWL (Range)	300 – 399 nm

Bandpass Filter Specifications | F-390-10-12.5

CWL	390 nm	CWL Tolerance	± 2 nm
FWHM	10 nm	FWHM Tolerance	± 2 nm
Minimum Peak Transmission	25	Blocking	≥ 4 OD
Blocking Range	X-ray – 1200 nm	Size (mm)	12.5 mm dia.
Size Tolerance	+0, -0.2 mm	Thickness	7.5 mm
Thickness Tolerance	+0, -0.2 mm	Clear Aperture	9.0 mm
Mount	Aluminum, Black Anodized	Ring Marking	CWL, FWHM, Light Direction
Specification Temperature	23˚ C	Humidity Resistance	MIL-810-810E, Method 507.3, 5 Cycles
Optical Quality	Commercial	CWL (Range)	300 – 399 nm

Bandpass Filter Specifications | F-390-10-25

CWL	390 nm	CWL Tolerance	± 2 nm
FWHM	10 nm	FWHM Tolerance	± 2 nm
Minimum Peak Transmission	25	Blocking	≥ 4 OD
Blocking Range	X-ray – 1200 nm	Size (mm)	25.0 mm dia.
Size Tolerance	+0, -0.1 mm	Thickness	7.5 mm
Thickness Tolerance	+0, -0.2 mm	Clear Aperture	21.0 mm
Mount	Aluminum, Black Anodized	Ring Marking	CWL, FWHM, Light Direction
Specification Temperature	23˚ C	Humidity Resistance	MIL-810-810E, Method 507.3, 5 Cycles
Optical Quality	Commercial	CWL (Range)	300 – 399 nm

Bandpass Filter Specifications | F-394-10-12.5

CWL	394 nm	CWL Tolerance	± 2 nm
FWHM	10 nm	FWHM Tolerance	± 2 nm
Minimum Peak Transmission	35	Blocking	≥ 4 OD
Blocking Range	X-ray – 1200 nm	Size (mm)	12.5 mm dia.
Size Tolerance	+0, -0.2 mm	Thickness	7.5 mm
Thickness Tolerance	+0, -0.2 mm	Clear Aperture	9.0 mm
Mount	Aluminum, Black Anodized	Ring Marking	CWL, FWHM, Light Direction
Specification Temperature	23˚ C	Humidity Resistance	MIL-810-810E, Method 507.3, 5 Cycles
Optical Quality	Commercial	CWL (Range)	300 – 399 nm

Bandpass Filter Specifications | F-400-10-12.5

CWL	400 nm	CWL Tolerance	± 2 nm
FWHM	10 nm	FWHM Tolerance	± 2 nm
Minimum Peak Transmission	35	Blocking	≥ 4 OD
Blocking Range	X-ray – 1200 nm	Size (mm)	12.5 mm dia.
Size Tolerance	+0, -0.2 mm	Thickness	7.5 mm
Thickness Tolerance	+0, -0.2 mm	Clear Aperture	9.0 mm
Mount	Aluminum, Black Anodized	Ring Marking	CWL, FWHM, Light Direction
Specification Temperature	23˚ C	Humidity Resistance	MIL-810-810E, Method 507.3, 5 Cycles
Optical Quality	Commercial	CWL (Range)	400 – 499 nm

Bandpass Filter Specifications | F-400-10-25

CWL	400 nm	CWL Tolerance	± 2 nm
FWHM	10 nm	FWHM Tolerance	± 2 nm
Minimum Peak Transmission	35	Blocking	≥ 4 OD
Blocking Range	X-ray – 1200 nm	Size (mm)	25.0 mm dia.
Size Tolerance	+0, -0.1 mm	Thickness	7.5 mm
Thickness Tolerance	+0, -0.2 mm	Clear Aperture	21.0 mm
Mount	Aluminum, Black Anodized	Ring Marking	CWL, FWHM, Light Direction
Specification Temperature	23˚ C	Humidity Resistance	MIL-810-810E, Method 507.3, 5 Cycles
Optical Quality	Commercial	CWL (Range)	400 – 499 nm

Bandpass Filter Specifications | F-400-40-25

CWL	400 nm	CWL Tolerance	± 8 nm
FWHM	40 nm	FWHM Tolerance	± 8 nm
Minimum Peak Transmission	40	Blocking	≥ 4 OD
Blocking Range	X-ray – 1200 nm	Size (mm)	25.0 mm dia.
Size Tolerance	+0, -0.1 mm	Thickness	7.5 mm
Thickness Tolerance	+0, -0.2 mm	Clear Aperture	21.0 mm
Mount	Aluminum, Black Anodized	Ring Marking	CWL, FWHM, Light Direction
Specification Temperature	23˚ C	Humidity Resistance	MIL-810-810E, Method 507.3, 5 Cycles
Optical Quality	Commercial	CWL (Range)	400 – 499 nm

Bandpass Filter Specifications | F-405-10-12.5

CWL	405 nm	CWL Tolerance	± 2 nm
FWHM	10 nm	FWHM Tolerance	± 2 nm
Minimum Peak Transmission	45	Blocking	≥ 4 OD
Blocking Range	X-ray – 1200 nm	Size (mm)	12.5 mm dia.
Size Tolerance	+0, -0.2 mm	Thickness	7.5 mm
Thickness Tolerance	+0, -0.2 mm	Clear Aperture	9.0 mm
Mount	Aluminum, Black Anodized	Ring Marking	CWL, FWHM, Light Direction
Specification Temperature	23˚ C	Operating Temperature Range	-50° C to +70° C
Humidity Resistance	MIL-810-810E, Method 507.3, 5 Cycles	Optical Quality	Commercial
CWL (Range)	400 – 499 nm

Bandpass Filter Specifications | F-405-10-25

CWL	405 nm	CWL Tolerance	± 2 nm
FWHM	10 nm	FWHM Tolerance	± 2 nm
Minimum Peak Transmission	37	Blocking	≥ 4 OD
Blocking Range	X-ray – 1200 nm	Size (mm)	25.0 mm dia.
Size Tolerance	+0, -0.1 mm	Thickness	7.5 mm
Thickness Tolerance	+0, -0.2 mm	Clear Aperture	21.0 mm
Mount	Aluminum, Black Anodized	Ring Marking	CWL, FWHM, Light Direction
Specification Temperature	23˚ C	Operating Temperature Range	-50° C to +70° C
Humidity Resistance	MIL-810-810E, Method 507.3, 5 Cycles	Optical Quality	Commercial
CWL (Range)	400 – 499 nm

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