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Laser Line Longpass Filters

Laser Line Longpass Filters

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  • Up to 93% Transmission to Detect Weak Signals
  • Deep > OD 6 Blocking for Maximum Laser Rejection
  • Ideal for Raman Spectroscopy, Confocal Microscopy, and Biotech Instrumentation
  • Unrivaled Performance and Lifetime

Our Laser Line Longpass filters offer unprecedented performance in longpass laser edge filter applications. The steep edges (measured from an optical density of 6.0 to a transmission of 50%) make it possible to measure even the smallest Raman shifts, making these filters a superior alternative to costly holographic notch filters for Stokes Raman scattering measurements. Compared to notch filters, these edge filters offer better transmission, higher laser line blocking, and steeper edges, permitting measurement of Raman signals extremely close to the laser line. The large bandwidths and exceptional transmission permit these filters to be used in even the most demanding imaging applications.

Common Specifications

Diameter (mm):
25.00 +0.0/-0.1
Clear Aperture CA (mm):
22
Thickness Tolerance (mm):
±0.1
Clear Aperture (%):
88
Angle of Incidence (°):
0 ±2
Optical Density OD (Average):
≥6.0
Substrate:
Fused Silica (Corning 7980)
Coating:
Hard Coated
Surface Quality:
60-40
Damage Threshold, By Design:
0.5 J/cm2 @ 266nm, 10ns, 10Hz
1 J/cm2 @ 532nm, 10ns, 10Hz
Mount Thickness (mm):
3.5
Durability:
Environmental: MIL-STD-810F, Physical: MIL-C-48497A

Products

Dia. (mm)  Laser Blocking Wavelength (nm)   Transition Width (nm)   Edge Steepness (nm)   Bandwidth (nm)   Transmission Wavelength (nm)   Compare   Stock Number   Price  Buy
25.00 248.6 <5.0 2.0 >250 261 - 560.8
25.00 266 <2.7 2.1 >300 272.4 - 600
25.00 325 <3.3 1.60 >400 329.2 - 733.1
25.00 355 <3.6 1.80 >400 359.6 - 800.8
25.00 473 <4.7 2.40 >550 479.1 - 1066.9
25.00 488 <4.9 2.40 >600 494.3 - 1100.8
25.00 514.5 <5.1 2.60 >600 521.2 - 1160.5
25.00 532 <5.3 2.70 >600 538.9 - 1200
25.00 632.8 <6.3 3.20 >600 641 - 1427.4
25.00 785 <7.8 3.90 >900 795.2 - 1770.7
25.00 808 <8.1 4.0 >1000 818.5 - 1822.6
25.00 830 <8.3 4.2 >1000 840.8 - 1872.2
25.00 980 <9.8 4.90 >1000 992.7 - 2000
25.00 1064 <10.6 5.30 >900 1077.8 - 2000

Technical Information