Bandpass Filter, 50.8x50.8 mm, 400±10 nm, 70±30 nm FWHM

The 20BPF70-400 Bandpass Filter is a 2 x 2 inch (50.8 x 50.8 mm) square bandpass filter with a center wavelength of 400 ± 10 nm and a Full Width Half Max of 70 ± 30 nm. See Curve 22, for transmission graph. Our Bandpass Filters pass a narrow spectral band of UV, visible, or NIR radiation and reject out-of-band wavelengths from the X-ray to the far IR. Applications include spectral radiometry, medical diagnostics, chemical analysis, colorimetry, astronomy, and wherever spectral isolation is required.

Specifications

Technical Specs

Type
Bandpass Filters
Center Wavelength
400 nm
Center Wavelength Tolerance
±10 nm
FWHM
70±30 nm
Effective Index of Refraction
1.79
Size
50.8 x 50.8 mm
Size Tolerance
+0/-0.5 mm
Thickness
0.123 in.
Surface Quality
80-50 scratch-dig

Minimum Peak Transmission
60%
Humidity Resistance
Per MIL-STD-810E, method 507.3, procedure III, modified to 5 cycles
Clear Aperture
45.5 mm
Temperature Range
-50 to 100°C
Wavelength Shift with Temperature
0.01 to 0.02 nm/°C
Cleaning
See How to Clean Optics

Type
Bandpass Filters
Center Wavelength
400 nm
Center Wavelength Tolerance
±10 nm
FWHM
70±30 nm
Effective Index of Refraction
1.79
Size
50.8 x 50.8 mm
Size Tolerance
+0/-0.5 mm
Thickness
0.123 in.
Surface Quality
80-50 scratch-dig

Minimum Peak Transmission
60%
Humidity Resistance
Per MIL-STD-810E, method 507.3, procedure III, modified to 5 cycles
Clear Aperture
45.5 mm
Temperature Range
-50 to 100°C
Wavelength Shift with Temperature
0.01 to 0.02 nm/°C
Cleaning
See How to Clean Optics

Resources & Downloads

2D Product Drawings

BAND-S(58.2 kB, PDF)

Other

20BPF70-400 RoHS Certificate(264.5 kB, PDF)
20BPF70-400_ROHS2-2021.pdf(281 kB, PDF)

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