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See all 14 Products in Family

25mm Dia., 355nm Laser Line Longpass Filter

Laser Line Longpass Filters

Stock #47-499

$695.00

Qty 1
$695.00

Volume Pricing
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Diameter (mm):

25.00 +0.0/-0.1

Thickness Tolerance (mm):

±0.1

Laser Blocking Wavelength (nm):

355

Design Wavelength DWL (nm):

355

Transition Width (nm):

<3.6

Edge Steepness (nm):

1.80

Bandwidth (nm):

>400

Transmission Wavelength (nm):

359.6 - 800.8

Angle of Incidence (°):

0 ±2

Optical Density OD:

≥6.0

OD 6 Blocking Wavelength Range (nm):

200 - 355

Coating:

Hard Coated

Substrate:

Fused Silica

Surface Quality:

60-40

Transmission (%):

93.00

Type:

Longpass Filter

Clear Aperture (%):

>80

Durability:

Environmental: MIL-STD-810F, Physical: MIL-C-48497A

Transmitted Wavefront, P-V:

<λ/4 @ 633nm

Temperature Dependence (ppm/°C):

Angle Tuning Range, for 0 - 8° Shift:

-0.3% of Laser Wavelength

Mount Thickness (mm):

3.5

Damage Threshold, Pulsed:

1 J/cm² @ 532nm, 10ns

Regulatory Compliance

RoHS 2015:

Compliant

REACH 201:

Compliant

Product Family Description

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.