Nd:YAG Harmonic Beamsplitter, 25.4 mm, 532 nm Refl., 1064 nm Trans.

High Energy Nd:YAG Laser Harmonic Beamsplitters

The 10QM20HB.21 High-Energy Nd:YAG Harmonic Beamsplitter is 1.0 in. (25.4 mm) in diameter with high reflectivity at 532 nm, and high transmission at 1064 nm. Our harmonic beam splitters are designed to separate Nd:YAG laser harmonics after frequency multiplication. These 25.4 mm diameter optics are precision polished select grade fused silica coated with hard refractory multilayers for high damage threshold. Harmonic beamsplitters are sometimes called Dichroic Filters or Beam Combiners.

Specifications

Technical Specs

Type
Beamsplitter
Diameter
25.4 mm
Reflectance Band
532 nm
Material
UV Grade Fused Silica
Coating Code
HB.21
Antireflection Coating
V-coat AR, R <0.25% at transmittance band
Transmittance Band
1064 nm
Angle of Incidence
45°
Reflection
R_avg > 99.5%
Transmission
T_avg>95%
Wavefront Distortion
λ/4 at 632.8 nm over the clear aperture
Damage Threshold
2.5 MW/cm² CW, 2.5 J/cm² with 0.1-100 nsec pulses @ 532 nm, typical
Surface Flatness
λ/10 at 632.8 nm over the clear aperture

Surface Quality
10-5 scratch-dig
Diameter Tolerance
+0/-0.25 mm
Thickness
6.35 mm
Thickness Tolerance
±0.5 mm
Wedge
≤3 arc min
Clear Aperture
> central 80% of diameter
Chamfers
0.25-0.76 mm face width
Chamfers Angle Tolerance
45° ±15°
Durability
MIL-C-675C, moderate abrasion million cycles
Cleaning
See How to Clean Optics

Type
Beamsplitter
Diameter
25.4 mm
Reflectance Band
532 nm
Material
UV Grade Fused Silica
Coating Code
HB.21
Antireflection Coating
V-coat AR, R <0.25% at transmittance band
Transmittance Band
1064 nm
Angle of Incidence
45°
Reflection
R_avg > 99.5%
Transmission
T_avg>95%
Wavefront Distortion
λ/4 at 632.8 nm over the clear aperture
Damage Threshold
2.5 MW/cm² CW, 2.5 J/cm² with 0.1-100 nsec pulses @ 532 nm, typical
Surface Flatness
λ/10 at 632.8 nm over the clear aperture

Surface Quality
10-5 scratch-dig
Diameter Tolerance
+0/-0.25 mm
Thickness
6.35 mm
Thickness Tolerance
±0.5 mm
Wedge
≤3 arc min
Clear Aperture
> central 80% of diameter
Chamfers
0.25-0.76 mm face width
Chamfers Angle Tolerance
45° ±15°
Durability
MIL-C-675C, moderate abrasion million cycles
Cleaning
See How to Clean Optics

Resources & Downloads

Other

10QM20HB.21 RoHS Certificate(265.9 kB, PDF)
10QM20HB.21_ROHS2-2021.pdf(279.2 kB, PDF)

2D Product Drawings

BS-1-DWG-3 arc-S(72 kB, PDF)

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