issue date：2016-3-31 15:35:44 visit frequency：3045
Trapezoidally assembled windows consist of four pieces of glass windows. And they are assembled together by optical glue. They are mainly used in Automatic Self Leveling instruments.
Perpendicularly assembled windows are manufactured by different materials.The connection ends are ground into strict 45 degree, then glued together by optical glue.
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BK7 or others |
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Size (L×W×H×T) |
49 x 48 x 2 x 4mm, 75.3 x 75.3 x 28.9 x 5.8mm, 72 x 72 x 33 x 5mm or others |
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Dimensiontolerance |
±0.1mm |
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Thickness tolerance |
±0.05mm |
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Clear aperture |
>85% |
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Surface quality |
40-20 |
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Flatness |
λ/4@632.8nm |
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Parallelism |
±6 arc sec |
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Bevel |
0.2 x 45 deg |
last：Nd:YAG
next：Single Plate Windows
