Optical Specifications	Value
Transmission Band 1	Tavg > 93% 491.2 – 1100.8 nm
Blocking Band 1	ODabs > 6 488 nm
Blocking Band 2	ODavg > 6 394 – 488 nm (typical)
Edge Wavelength 1	489.1 nm
Edge Steepness (%)	0.2%
Edge Steepness (cm-1)	40.9 cm-1
Edge Steepness (nm)	1.0 nm
Laser Wavelength 1	488 nm
Transition Width (nm)	2.4 nm
Transition Width (cm-1)	102 cm-1
General Filter Specifications	Value
Angle of Incidence	0 ± 2 degrees
Cone Half-angle	5 degrees
Optical Damage Rating	0.5 J/cm² @ 266 nm (10 ns pulse width), 1 J/cm² @ 532 nm (10 ns pulse width)
Physical Filter Specifications	Value
Transverse Dimensions (diameter)	25 mm
Transverse Tolerance	+ 0.0 / – 0.1 mm
Filter Thickness (mounted)	3.5 mm
Filter Thickness Tolerance (mounted)	± 0.1 mm
Clear Aperture	≥ 22 mm
Scratch-Dig	60-40
Substrate Type	Fused Silica
Filter Thickness (unmounted)	2.0 mm
Filter Thickness Tolerance (unmounted)	± 0.1 mm
Orientation	Arrow on ring indicates preferred direction of propagation of light

Topic	Description
Cleaning Optical Filters	Instructions for cleaning hard coated optical filters
Filter Reliability	Compares the performance and reliability of hard coated filters to traditional soft-coated filters and provides information about the testing standards for Semrock filters
Measuring Light with Wavelengths & Wavenumbers	Compares units of wavelength to wavenumbers and provides formulas for calculating wavenumber shift
Laser Damage Threshold	Provides information for calculating laser damage threshold for pulsed and continuous wave lasers
Working with Optical Density	Tables to describe the relationship between OD and transmission with tips for quickly calculating OD
Filter Spectra at Non-normal Angles of Incidence	Discusses how angle tuning affects the spectral response of different types of filters.
Filter Types for Raman Spectroscopy Applications	Compares the performance of different combinations of LWP and SWP edge filters, notch and laser line filters for Raman applications
RazorEdge Filter Layouts	Describes two different filter layouts that are commonly used in Raman applications
Transition Width & Edge Steepness	Describes how measurements for edge steepness and transition width differ

Topic	Description
Thin-Film Filters for Raman Spectroscopy	Turan Erdogan, PhD, and Victor Mizrahi, PhD, Semrock Inc., Spectroscopy, December 2004 Describes the types and functions of filters commonly used in Raman spectroscopy

Topic	Description
Raman Spectroscopy	An overview of Raman spectroscopy, including solutions from Semrock and additional learning resources.

488 nm RazorEdge® ultrasteep long-pass edge filter

Specifications