OMP170 Mastering Glass Substrate

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OMP170 Mastering Glass Substrate
Posting date : Apr 14, 2009
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37-
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2.1 Materials The raw material of the glass substrate is class “AA” glass supplied from Pilkington. 2.2 Outer diameter Outer diameter is measured with a vernier caliper. Outer diameter φ170±0.1 (mm) 2.3 Thickness Thickness is measured with a micrometer caliper. Thickness 1.23±0.05 (mm) 2.4 Parallelism Parallelism should be less than 10μm, and it is measured with a optical interferometer. 2.5 Flatness Flatness should be less than 10 μm, and it is measured with a optical interferometer. 2.6 Roughness Roughness should be less than 20Å , and it is measured with GPIxP Interference Horizontal System . 2.7 Edge Beveled edges should be ground, and the dimensions are as follows. C = 0.2 mm X 45°。 Please contact yingke-optical live cn

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