Ultrafast Harmonic Beamsplitter, 25.4 mm, 400 nm Refl., 800 nm Trans.

The 10Q20UF.HB1 Ultrafast Harmonic Beamsplitter is 1.0 in. (25.4 mm) in diameter with high reflectivity at 400 nm, and high transmission at 800 nm. Our harmonic beam splitters are designed to separate Ti:Sapphire laser first order harmonic after frequency multiplication. These 25.4 mm diameter optics with a 3 mm thickness 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
400 nm
Material
Fused Silica
Reflectance
R_s ≥99.8%, R_p ≥99.5%,
Coating Code
UF.HB1
Antireflection Coating
V-coat AR, R< 0.25%
Transmittance Band
800 nm
Angle of Incidence
45°
Transmittance
T_s ≥95%, T_p ≥95%
Orientation
Beam should enter surface marked with an arrow
Wavefront Distortion
≤λ/4 at 632.8 nm over clear aperture
Damage Threshold
5 MW/cm² CW, 5.0 J/cm² @ 1064 nm, 0.1-100 ns, 10 Hz, typical

Surface Flatness
≤λ/10 at 632.8 nm over clear aperture
Surface Quality
10-5 scratch-dig
Diameter Tolerance
+0/-0.25 mm
Thickness
3.0 mm
Thickness Tolerance
±0.5 mm
Wedge
≤3 arc min
Clear Aperture
> central 85% 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
400 nm
Material
Fused Silica
Reflectance
R_s ≥99.8%, R_p ≥99.5%,
Coating Code
UF.HB1
Antireflection Coating
V-coat AR, R< 0.25%
Transmittance Band
800 nm
Angle of Incidence
45°
Transmittance
T_s ≥95%, T_p ≥95%
Orientation
Beam should enter surface marked with an arrow
Wavefront Distortion
≤λ/4 at 632.8 nm over clear aperture
Damage Threshold
5 MW/cm² CW, 5.0 J/cm² @ 1064 nm, 0.1-100 ns, 10 Hz, typical

Surface Flatness
≤λ/10 at 632.8 nm over clear aperture
Surface Quality
10-5 scratch-dig
Diameter Tolerance
+0/-0.25 mm
Thickness
3.0 mm
Thickness Tolerance
±0.5 mm
Wedge
≤3 arc min
Clear Aperture
> central 85% 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

10Q20UF.HB1 RoHS Certificate(264.4 kB, PDF)
10Q20UF.HB1_ROHS2-2021.pdf(279.7 kB, PDF)

2D Product Drawings

Ultrafast HBS.pdf(94.5 kB, PDF)

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