Wedge prism
Wedge prisms can be used individually to deviate a laser beam a set angle, or two wedge prisms can be used together for beam steering applications. A single wedge prism's ability to deviate the angle of an incident beam is measured in Diopters with 1 diopter deviating the beam 1cm at a 1m working distance. Two wedge prisms can be used as an anamorphic pair for beam shaping (to correct the elliptical shape of diode outputs). Or, a pair of wedge prisms can steer a beam anywhere within a circle described by the full angle 4θ, where θ is the deviation from a single prism.
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Wedge prism |
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Material |
H-K9L (Schott BK7)/Fused Silica/glass |
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Dimension Tolerance |
±0.1mm |
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Surface Accuracy |
L/4@632.8nm |
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Surface Quality |
40-20 |
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Angular Tolerance |
±3 arc min |
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Clear Aperture |
>90% |
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Bevelling |
<0.2 *45 |
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Coating |
Custom Design |
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No. |
Deviation Angle |
Dia(mm) |
T(mm) |
SQ |
Flatness |
Wedge Angle |
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41N990 |
2° |
25.4 |
4.72 |
40-20 |
L/4 |
3°53’ |
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41N991 |
4° |
25.4 |
6.43 |
40-20 |
L/4 |
7°41’ |
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41N992 |
6° |
25.4 |
8.11 |
40-20 |
L/4 |
11°22’ |
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41N993 |
8° |
25.4 |
9.74 |
40-20 |
L/4 |
14°52’ |
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41N994 |
10° |
25.4 |
11.33 |
40-20 |
L/4 |
18°9’ |
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