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WSB/WSSQ/WSSQK
Diameter φD
Thickness t
Surface Flatness
Wedge angle
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Wedged substrates can separate the reflected beam by the front and back surface of the substrates by the slight wedge angle. They can be used as a reference test plate for interferometers and beam samplers.

◦It can also be used as a prism to refract at a small angle. Beam deflection angle δ can be calculated refractive index n, from the wedge angle α.
δ = sin−1( n sinα) − α ≒( n − 1) α
◦In BK7, 0.52 times the angle of the wedge, and in synthetic fused silica, 0.46 times the angle of the wedge. (Visible range, normal incidence)

Related product
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Technical Data
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Guide

▶An arrow mark on the thicker side of the edge indicates front surface of the substrate.
▶It is also available beam sampler (BS4) coated with anti-reflection coating on the back.
W3025
▶It is also available fabrication of the wedged substrates with a requested coating.

Attention

▶Wedged substrates are not coated on both sides. There is a 3.5 to 4% reflection of the surface of the glass.
▶If the wedged substrate is inserted in the optical path of the laser beam, the transmitted beam is inclined slightly causing the refraction.

Common Specifications
MaterialBK7
Clear aperture90% of the diameter
Outline Drawing

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Schematic

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Typical Transmittance Data

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T: Transmission
Surface Accuracy Data (reference data)

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・Surface accuracy measurement method:
    Measured with Zygo laser interferometer
・Surface accuracy measurement wavelength
    632.8nm
・Surface accuracy guaranteed temperature
    23°C±2°C
Spec
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Part Number
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    JP Yen Stock Qty
WSB-10C05-10-1
WSB-10C05-20-1
WSB-15C05-10-1
WSB-15C05-20-1
WSB-20C05-10-1
WSB-20C05-20-1
WSB-25C05-10-1
WSB-25C05-20-1
WSB-30C05-10-0.5
WSB-30C05-20-0.5
WSB-30C05-10-1
WSB-30C05-20-1
WSB-30C05-10-2
WSB-30C05-20-2
WSB-30C07-10-3
WSB-30C07-20-3
WSB-40C06-10-1
WSB-40C06-20-1
WSB-50C08-10-0.5
WSB-50C08-20-0.5
WSB-50C08-10-1
WSB-50C08-20-1
WSB-50C08-10-2
WSB-50C08-20-2
WSB-50C10-10-3
WSB-50C10-20-3
WSB-60C10-10-1
WSB-60C10-20-1
WSB-80C12-10-1
WSB-80C12-20-1
WSB-100C15-10-1
WSB-100C15-20-1

BK7

φ10mm

5mm

λ/10

1°±5′

10−5

BK7

φ10mm

5mm

λ/20

1°±5′

10−5

BK7

φ15mm

5mm

λ/10

1°±5′

10−5

BK7

φ15mm

5mm

λ/20

1°±5′

10−5

BK7

φ20mm

5mm

λ/10

1°±5′

10−5

BK7

φ20mm

5mm

λ/20

1°±5′

10−5

BK7

φ25mm

5mm

λ/10

1°±5′

10−5

BK7

φ25mm

5mm

λ/20

1°±5′

10−5

BK7

φ30mm

5mm

λ/10

0.5°±5′

10−5

BK7

φ30mm

5mm

λ/20

0.5°±5′

10−5

BK7

φ30mm

5mm

λ/10

1°±5′

10−5

BK7

φ30mm

5mm

λ/20

1°±5′

10−5

BK7

φ30mm

5mm

λ/10

2°±5′

10−5

BK7

φ30mm

5mm

λ/20

2°±5′

10−5

BK7

φ30mm

7mm

λ/10

3°±5′

10−5

BK7

φ30mm

7mm

λ/20

3°±5′

10−5

BK7

φ40mm

6mm

λ/10

1°±5′

10−5

BK7

φ40mm

6mm

λ/20

1°±5′

10−5

BK7

φ50mm

8mm

λ/10

0.5°±5′

10−5

BK7

φ50mm

8mm

λ/20

0.5°±5′

10−5

BK7

φ50mm

8mm

λ/10

1°±5′

10−5

BK7

φ50mm

8mm

λ/20

1°±5′

10−5

BK7

φ50mm

8mm

λ/10

2°±5′

10−5

BK7

φ50mm

8mm

λ/20

2°±5′

10−5

BK7

φ50mm

10mm

λ/10

3°±5′

10−5

BK7

φ50mm

10mm

λ/20

3°±5′

10−5

BK7

φ60mm

10mm

λ/10

1°±5′

10−5

BK7

φ60mm

10mm

λ/20

1°±5′

10−5

BK7

φ80mm

12mm

λ/10

1°±5′

10−5

BK7

φ80mm

12mm

λ/20

1°±5′

10−5

BK7

φ100mm

15mm

λ/10

1°±5′

10−5

BK7

φ100mm

15mm

λ/20

1°±5′

10−5

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