Laser Diode Filters

Visible laser diode filters are made with advanced processes to enhance their physical longevity, as opposed to standard “off-the-shelf” filters. SpectroFilm laser diode filters have an anticipated working life of five years.

Angle of Incidence and Blue Shifting
The center wavelength of the filter will shift toward shorter (blue) wavelengths as the angle of incidence increases. The greater the angle, the greater the shift. This is known as “blue shifting”.

Laser Diode Tolerances
Diodes typically have a wavelength tolerance of +/-10nm. Corresponding to to surrounding temperature decreases and increases, this wavelength (measured at room temperature) will decrease and increase at a rate of 0.25nm/ºC.

Laser Wavelength (nm): Actual CWL@0º AOI (to compensate for blue shift)

Laser Diode Filter Specifications

Laser Line
Wavelength (nm)

ACTUAL CWL@0° AOI

to compensate for blue shift

SpectroFilm
Part Number

0° AOI Application – Narrow Laser lOnm B/W +/-2nm

532nm
635nm
660nm
685nm
532 +/-2nm
635 +/-2nm
660 +/-2nm
685 +/-2nm
532CW-10BW-24.4
635CW-10BW-24.4
660CW-10BW-24.4
685CW-10BW-24.4
0°-15° AOI Application – Narrow Laser 20nm B/W +/-4nm
635nm
656nm
660nm
670nm
680nm
685nm
780nm
830nm
637.5 +/-2nm
658.5 +/-2nm
662.5 +/-2nm
672.5 +/-2nm
682.5 +/-2nm
687.5 +/-2nm
782.5 +/-2nm
832.5 +/-2nm
635CW-20BW-24.4
656CW-20BW-24.4
660CW-20BW-24.4
670CW-20BW-24.4
680CW-20BW-24.4
685CW-20BW-24.4
780CW-20BW-24.4
830CW-20BW-24.4
0°-25° AOI Application – Narrow Laser 40nm B/W +/-8nm

635nm
656nm
660nm
670nm
680nm
685nm
780nm
830nm

640 +/-5nm
661 +/-5nm
665 +/-5nm
675 +/-5nm
690 +/-5nm
785 +/-5nm
835 +/-5nm

635CW-40BW-24.4
656CW-40BW-24.4
660CW-40BW-24.4
670CW-40BW-24.4
685CW-40BW-24.4
780CW-40BW-24.4
830CW-40BW-24.4

0°-35° AOI Application – Wide Laser 70nm B/W +/-14nm

635nm
656nm
660nm
670nm
685nm
780nm
810nm
830nm

644 +/-10nm
665 +/-10nm
669 +/-10nm
679 +/-10nm
694 +/-10nm
789 +/-10nm
819 +/-10nm
839 +/-10nm

635CW-70BW-24.4
656CW-70BW-24.4
660CW-70BW-24.4
670CW-70BW-24.4
685CW-70BW-24.4
780CW-70BW-24.4
810CW-70BW-24.4
830CW-70BW-24.4

  • Transmission at Laser Line: 80% Minimum (85% Typical)
  • FWHM (Bandwidth): Narrow 20nm, Intermediate 40nm, Wide 70nm
  • Out of Band Transmission: .001% (50db attenuation average)
  • Spectral Range: X-ray to 1150nm
  • Effective Index: 2.1
  • Operating Temperature: 20ºC to 80ºC
  • Humidity Resistance: Minimum 20 Cycles (MIL-STD-810E) Method 507 Procedure 1
  • Size and Tolerance: Diameter 24.4mm =/-.15, Thickness 3mm +/-.25, Usable Aperature 23mm +/-.40
  • Pricing: 1-3 pieces $85 each, 4-10 pieces $70 each. Call for other quantities.
  • Custom black anodized rings for 24.4mm diameter are available upon request. O.D. to 25.4mm (1″ diameter). All laser diode filters are manufactured to be ISO9200-compliant.
  • For further information on laser diode filters call our Billerica, MA office
    at (978) 670-7192.
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