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Secondary pressing blanks of optical glass

Reheated-press blanks are formed by reheated-press process.

Tolerances of outer diameters and thicknesses for RP are shown in Table 16.


                                                                                Table 16

External diameter of molded blank(mm)

Secondary pressing blank   

External diatolerance (mm)

Thickness tolerance (mm)

<10

±0.10

+0.6/0

10~20

±0.10

+0.5/0

20~40

±0.15

+0.5/0

40~60

±0.20

+0.5/0

60~150

±0.30

+0.6/0

>150

±0.50

+0.8/0

 

  

 

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