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639/21 nm Semrock® Polarizing Bandpass filter

Part Number: PBP01-639/21-25x36

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  • Your filter spectrum may differ slightly from the typical spectrum above, but is certified to meet the optical specifications noted below.
  • Above data is for s & p polarized light at 45 degrees incidence. P-pol is measured and S-pol is theory data.
Optical Specifications
Transmission Band 1 (p-pol)Tabs > 95% 628.5 – 650 nm
Center Wavelength 1639.5 nm
Guaranteed Minimum Bandwidth 120 nm
FWHM Bandwidth 1 (nominal)33.5 nm
Blocking Band 1ODavg > 2 300 – 511 nm
Blocking Band 1 (p-pol)ODavg > 6 511 – 602 nm
Blocking Band 1 (s-pol)ODavg > 6 488 – 840 nm
Blocking Band 2ODavg > 2 795 – 1100 nm
Blocking Band 2 (p-pol)ODavg > 6 675 – 795 nm

General Filter Specifications
Angle of Incidence45 ± 0.5 degrees
Cone Half-angle0 degrees
Angle of Incidence (wide)40.5 – 51 degrees
Optical Damage Rating1 J/cm2 at 532 nm (10 ns pulse width, p-pol), 2 J/cm2 at 1064 nm (10 ns pulse width, s-pol)
Laser Wavelength 1640 nm
Contrast                    1,000,000:1
Contrast (note)Ratio of transmission through two identical aligned polarizers to transmission through same pair of crossed polarizers
Filter Effective Index1.79 Understanding ‘Effective Index of Refraction’ neff

Physical Filter Specifications (applies to standard sized parts; contact us regarding other sizes)
Transverse Dimensions (L x W)25.2 mm x 35.6 mm
Transverse Dimensions (Diameter)25.0 mm
Transverse Tolerance± 0.1 mm
Filter Thickness (unmounted)2.0 mm
Filter Thickness Tolerance (unmounted)± 0.1 mm
Clear Aperture≥ 85%
Substrate TypeFused Silica
Substrate Thickness (unmounted)2.0 mm
Substrate Thickness Tolerance (unmounted)± 0.1 mm
OrientationCoating text towards light – For use as a polarizer
Coating text away from light – For use as an analyzer

Laser Clean-up Filters


632.8 nm MaxLine® laser clean-up filter

• Laser Wavelength = 632.8 nm
• Tabs > 90% 632.8 nm
• FWHM of 2.4 nm (typical); 4.4 nm (maximum)

Custom sizing delivery confirmed ARO (sizing fee applies).
Part # LL01-633-12.5
(Non-US pricing info)


640/8 nm MaxDiode™ laser clean-up filter

• Laser Wavelength = 640 nm
• Tavg > 90% 636.3 – 644.3 nm
• Center Wavelength of 640 nm and GMBW of 8 nm

Custom sizing delivery confirmed ARO (sizing fee applies).
Part # LD01-640/8-12.5
(Non-US pricing info)


647.1 nm MaxLine® laser clean-up filter

• Laser Wavelength = 647.1 nm
• Tabs > 90% 647.1 nm
• FWHM of 2.5 nm (typical); 4.5 nm (maximum)

Custom sizing delivery confirmed ARO (sizing fee applies).
Part # LL01-647-12.5
(Non-US pricing info)

US domestic pricing only. If you are ordering from outside the US, please contact your nearest regional distributor for the correct list price.
Tech Note
Cleaning Optical FiltersInstructions for cleaning hard coated optical filters
Filter ReliabilityCompares the performance and reliability of hard coated filters to traditional soft-coated filters and provides information about the testing standards for Semrock filters
Laser Damage ThresholdProvides information for calculating laser damage threshold for pulsed and continuous wave lasers
Working with Optical DensityTables to describe the relationship between OD and transmission with tips for quickly calculating OD
Thin Film Plate PolarizersCompares the benefits and drawbacks of the three main types of polarizers
White Paper
A New Class of Polarization Optics Designed Specifically for LasersAn in-depth comparison of the major types of polarizers and polarizing beamsplitters in terms of key performance parameters
Understanding Polarization A guide to understanding linear, circular and elliptical polarization, birefringence and the tools available for controlling polarization
Fluorescence Polarization in Life SciencesA review of various applications in life sciences that are based on fluorescence polarization

639/21 Polarization Polarizing Polarizing-Bandpass PBP01-639/21 PBP PBP01 Polarization-Bandpass

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