Bandpass Filter, 50.8x50.8 mm, 650±3.5 nm, 25±3.5 nm FWHM

The 20BPF25-650 Bandpass Filter is a 2 x 2 inch (50.8 x 50.8 mm) square bandpass filter with a center wavelength of 650 ± 3.5 nm and a Full Width Half Max of 25 ± 3.5 nm. See Curve 19, 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
650 nm
Center Wavelength Tolerance
±3.5 nm
FWHM
25±3.5 nm
Effective Index of Refraction
1.5
Size
50.8 x 50.8 mm
Size Tolerance
+0/-0.5 mm
Thickness
0.122 in.
Surface Quality
80-50 scratch-dig

Minimum Peak Transmission
50%
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
650 nm
Center Wavelength Tolerance
±3.5 nm
FWHM
25±3.5 nm
Effective Index of Refraction
1.5
Size
50.8 x 50.8 mm
Size Tolerance
+0/-0.5 mm
Thickness
0.122 in.
Surface Quality
80-50 scratch-dig

Minimum Peak Transmission
50%
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