Semrock LPD02-532RU-25 RazorEdge Dichroic Laser Beamsplitter

Overview: Semrock LPD02-532RU-25 RazorEdge Dichroic

The LPD02-532RU-25 is a high-performance dichroic beamsplitter designed to reflect a 532 nm laser line while transmitting higher (red-shifted) wavelengths—ideal for Raman spectroscopy setups.

Key Optical Specifications:

• Reflects: 532 nm with Rabs>94%R_{abs} > 94\%Rabs​>94%; s-polarization $>98\%$, p-polarization $>90\%$

• Transmits: 538.9 – 824.8 nm with average transmission Tavg>93%T_{avg} > 93\%Tavg​>93%

• Edge wavelength: ~537.2 nm

• Transition width: 5.3 nm (~186 cm⁻¹)

• Edge steepness: 0.5% (~2.7 nm, 93.5 cm⁻¹)

General & Physical Specs:

• Angle of Incidence: 45° (shift ≤ 0.20%/° over 35–55° range)

• Cone Half-angle: 0.5°

• Optical Damage Rating: 1 J/cm² @ 532 nm (10 ns pulse)

• Flatness / RWE Classification: ‘Laser’ class, with reflected wavefront error < 6λ P-V @ 632.8 nm

• Steepness: Ultra-steep transitions

• Diameter: 25 mm; Clear aperture: ≥ 22 mm

• Mounted thickness: 3.5 mm (±0.1 mm)

• Scratch-dig: 60-40

• Substrate: Fused silica (low-autofluorescence optical glass)

• Orientation: Arrow on the mounted ring shows preferred light-propagation direction

Design

• Mounted circular version: 25 mm diameter, housed in a 3.5 mm-thick black-anodized aluminum ring.