830 nm Long Wave Pass Dichroic Filter

830 nm Long Wave Pass Dichroic Filter

The 830 nm long wave pass dichroic filter is a high-performance dichroic filter specifically designed for 780 nm, 785 nm, and 808 nm laser systems. Manufactured using precision multi-layer dielectric coating technology, it efficiently reflects the 780-830 nm laser band while transmitting the longer wavelength band of 845-1600 nm with high transmittance at 45°incidence. Featuring a steep cut-on edge, excellent wavefront quality, and high laser damage threshold, it is particularly suitable for Raman spectroscopy systems, laser scanning, bioimaging, and precision optical inspection equipment.

Product features：Specifically designed for 780 nm, 785 nm, and 808 nm laser systems；Operates at 45° angle of incidence；Average transmittance >93% over 845–1600 nm；High reflectance over 780–830 nm；Excellent reflection performance for both p‑polarized and s‑polarized light；High laser damage threshold

Part Number：MP-LWP-830

Application area：Raman spectrometers | Fluorescence microscopes | Laser scanning systems | Spectral analysis instruments | Scientific research and experimental equipment

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Main parameters
General Parameters
Optional Configurations
Downloads

Main parameters

Core parameters

Edge Wavelength Transmission Band Reflection Band

839.2 nm 845–1600 nm，Tavg >93% 350–830 nm

Dimension Drawing

General Parameters

Specification	Value
Laser Wavelength	785nm
Laser Wavelength	780nm
Laser Wavelength	~ 785nm
Laser Wavelength	~ 808nm
Transmission Band	Tavg > 93% 845 – 1600 nm
Reflection Band	780 – 830 nm
Reflection Band	350–780 nm
Reflection Band, p-pol	780–830
Reflection Band, s-pol	780–830
Edge Steepness	Standard (for Raman)
Edge Wavelength	839.2 nm
Angle of Incidence	45°with a shift of 0.35%/° (40 – 50 °)
Cone Half-angle	0.5°
Flatness / RWE Classification	Laser
Reflected Wavefront Error	< 6λ P-V RWE @ 632.8
Clear Aperture	≥ 80%（椭圆形）
Transverse Dimensions, LxW	25.2 mm × 35.6 mm
Filter Thickness, Unmounted	1.05 mm
Filter Thickness Tolerance, Unmounted	± 0.05 mm
Surface Quality (Scratch-Dig)	60-40
Filter Effective Index	2.0
Optical Damage Rating	1 J/cm sq. @ 532 nm (10 ns pulse width)
Orientation	Reflective surface marked with part-Orient in incoming light
Substrate Type	Fused Silica

Spectral Characteristic Curves

Transmittance-Wavelength Spectrum

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Optical Density Spectrum

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Optional Configurations

Downloads

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Product title: 830 nm Long Wave Pass Dichroic Filter

Product link: https://www.idealphotonics.com/product/detail/1721.html

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