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 Diode Filter Specifications

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

0º AOI application Narrow Laser 10nm B/W +/-2nm 532nm: 532 +/-2nm 660nm: 660 +/-2nm 0º-15º AOI application Narrow Laser 20nm B/W +/-4nm 635nm: 637.5 +/-2nm 656nm: 658.5 +/-2nm 660nm: 662.5 +/-2nm 670nm: 672.5 +/-2nm 680nm: 682.5 +/-2nm 685nm: 687.5 +/-2nm 780nm: 782.5 +/-2nm 830nm: 832.5 +/-2nm
0º-25º AOI application Narrow Laser 40nm B/W +/-8nm 635nm: 640 +/-5nm 656nm: 661 +/-5nm 670nm: 675 +/-5nm 685nm: 690 +/-5nm 780nm: 785 +/-5nm 810nm: 815 +/-5nm 830nm: 835 +/-5nm
0º-35º AOI application Narrow Laser 70nm B/W +/-14nm 635nm: 644 +/-10nm 656nm: 665 +/-10nm 670nm: 679 +/-10nm 685nm: 694 +/-10nm 780nm: 789 +/-10nm 810nm: 819 +/-10nm 830nm: 839 +/-10nm

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 30 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 offices at (978) 670-7192.

Information on Laser Diode Filters is also
available as a downloadable PDF file (and viewable within your web browser).

©2008 SpectroFilm. All rights reserved.
(978) 670-7192 • 34 Dunham Road, Billerica, MA 01821

SpectroFilm is the leading supplier of standard and custom OEM laser diode and optical passband filters.