DescriptionSpecifications
Models
Catalog PDF
Our broadband beam samplers are designed to split off, or sample, a beam by Fresnel reflection for beam monitoring applications where minimum disturbance of the transmitted beam is necessary. The precision optical substrate is uncoated on the front surface to achieve beam division by Fresnel reflection. The back surface is antireflection coated to prevent ghosting. A slight wedge in the substrate virtually eliminates internal fringes. Depending on the polarization of the incident beam, front surface reflectance from 110% can be attained at 45° incidence.
These beam samplers are available in either BK 7 for general use, or UV grade fused silica for optimal wavefront and thermal stability. Coating options cover the visible to near infrared regions. |
Coatings |
Wavelength Range (nm) |
Reflectivity per Surface |
Angle of Incidence |
Coating Code |
| 440700 |
Ravg <0.75 % |
45° |
NC.1 |
| 6601000 |
Ravg <0.75 % |
45° |
NC.2 |
| 10101550 |
Ravg <0.75 % |
45° |
NC.3 |
|
Specifications
| Material | BK7, grade A, fine annealed optical glass UV grade fused silica |
| Surface Flatness | Specification below at 632.8 nm over the clear aperture fringes |
| Clear Aperture | >central 80% of diameter |
| Diameter Tolerance | +0/-0.13 mm |
| Thickness Tolerance | ±0.38 mm |
| Wedge | 30 ±15 arc min |
| Chamfers | 25.4 mm: 0.25-0.76 mm face width x 45° ±15° 50.8 mm & 76.2 mm: 0.38-1.14 mm face width x 45° ±15° |
| Surface S1 | Uncoated, Fresnel reflection from uncoated substrate |
| Antireflection Coating, S2 | Multilayer coating, Ravg <0.75% at 45° over the specified wavelength range |
| Durability | MIL-C-675C |
| Cleaning | Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended (Unknown type Newport.Step.Product.XRefElement) |
| Damage Threshold | 500 W/cm2 CW, 1 J/cm2 with 10 nsec pulses, typical |
| Model | Diameter | Thickness | Material | Surface Flatness | Surface Quality |
| 10B10 | 25.4 | 6.10 | BK 7 | λ/5 | 20-10 |
| 10B20 | 1 (25.4) | Error: No Value | BK 7 | λ/10 | 15-5 scratch-dig |
| 10Q20 | 1 (25.4) | Error: No Value | UVFS | λ/10 | 15-5 scratch-dig |
| 10Q40 | 1 (25.4) | Error: No Value | UVFS | λ/20 | 10-2 scratch-dig |
| 20B10 | 50.8 | 9.40 | BK 7 | λ/5 | 20-10 |
| 20B20 | 2 (50.8) | Error: No Value | BK 7 | λ/10 | 15-5 scratch-dig |
| 20Q20 | 2 (50.8) | Error: No Value | UVFS | λ/10 | 15-5 scratch-dig |
| 20Q40 | 2 (50.8) | Error: No Value | UVFS | λ/20 | 10-2 scratch-dig |
| 30B10 | 76.2 | 12.45 | BK 7 | λ/5 | 20-10 |
| 30Q20 | 76.2 | 12.45 | UVFS | λ/10 | 15-5 |
| 30Q40 | 76.2 | 12.45 | UVFS | λ/20 | 10-2 |
| | Model | Description |
|
10B20NC.1
|
BK 7 Broadband Beam Sampler, 25.4 Dia, 6.10mm, λ/10, 440-700nm
|
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10B20NC.2
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BK 7 Broadband Beam Sampler, 25.4 Dia, 6.10mm, λ/10, 660-1000nm
|
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10B20NC.3
|
BK 7 Broadband Beam Sampler, 25.4 Dia, 6.10mm, λ/10, 1010-1550nm
|
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10Q20NC.1
|
Fused Silica Broadband Beam Sampler, 25.4 Dia, 6.10mm, λ/10, 440-700nm
|
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10Q20NC.2
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Fused Silica Broadband Beam Sampler, 25.4 Dia, 6.10mm, λ/10, 660-1000nm
|
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10Q20NC.3
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Fused Silica Broadband Beam Sampler, 25.4 Dia, 6.10mm, λ/10, 1010-1550nm
|
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10Q40NC.1
|
Fused Silica Broadband Beam Sampler, 25.4 Dia, 6.10mm, λ/20, 440-700nm
|
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10Q40NC.2
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Fused Silica Broadband Beam Sampler, 25.4 Dia, 6.10mm, λ/20, 660-1000nm
|
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10Q40NC.3
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Fused Silica Broadband Beam Sampler, 25.4 Dia, 6.10mm, λ/20, 1010-1550nm
|
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20B20NC.1
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BK 7 Broadband Beam Sampler, 50.8 Dia, 9.40mm, λ/10, 440-700nm
|
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20B20NC.2
|
BK 7 Broadband Beam Sampler, 50.8 Dia, 9.40mm, λ/10, 660-1000nm
|
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20B20NC.3
|
BK 7 Broadband Beam Sampler, 50.8 Dia, 9.40mm, λ/10, 1010-1550nm
|
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20Q20NC.1
|
Fused Silica Broadband Beam Sampler, 50.8 Dia, 9.40mm, λ/10, 440-700nm
|
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20Q20NC.2
|
Fused Silica Broadband Beam Sampler, 50.8 Dia, 9.40mm, λ/10, 660-1000nm
|
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20Q20NC.3
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Fused Silica Broadband Beam Sampler, 50.8 Dia, 9.40mm, λ/10, 1010-1550nm
|
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20Q40NC.1
|
Fused Silica Broadband Beam Sampler, 50.8 Dia, 9.40mm, λ/20, 440-700nm
|
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20Q40NC.2
|
Fused Silica Broadband Beam Sampler, 50.8 Dia, 9.40mm, λ/20, 660-1000nm
|
|
20Q40NC.3
|
Fused Silica Broadband Beam Sampler, 50.8 Dia, 9.40mm, λ/20, 1010-1550nm
|