25mm Dia., 785nm Laser Line Longpass Filter

Product Details 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. Specifications General Type: Longpass Filter Angle Tuning Range, for 0 – 8° Shift: -0.3% of Laser Wavelength Physical & Mechanical Properties Diameter (mm): 25.00 +0.0/-0.1 Clear Aperture CA (mm): 22 Clear Aperture (%): 88 Optical Properties Angle of Incidence (°): 0 ±2 Bandwidth (nm): >900 OD 6 Blocking Wavelength Range (nm): 638 – 785 Optical Density OD (Average): ≥6.0 Design Wavelength DWL (nm): 785 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Fused Silica (Corning 7980) Coating: Hard Coated Surface Quality: 60-40 Transmission (%): 93.00 Transmission Wavelength (nm): 795.2 – 1770.7 Edge Steepness (nm): 3.90 Transition Width (nm): <7.8 Laser Blocking Wavelength (nm): 785 Damage Threshold, By Design: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification. 0.5 J/cm 2 @ 266nm, 10ns, 10Hz 1 J/cm 2 @ 532nm, 10ns, 10Hz Threading & Mounting Mount Thickness (mm): 3.5 Environmental & Durability Factors Durability: Environmental: MIL-STD-810F, Physical: MIL-C-48497A Temperature Dependence (ppm/°C): <5 Regulatory Compliance RoHS 2015: Compliant × Reach 209: Compliant × Certificate of Conformance: View ×