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    My lab is doing the hardcoat as well. but some...

    My lab is doing the hardcoat as well. but some minor problem arised after the lens was cleaned by ultrasonic cleaning, they tends to stick on with some dust and form a small dot after the hardcoat...
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    I have already solved the stated problem and just...

    I have already solved the stated problem and just found out it was the Hydrophobic top coat that cause the color shifting. It seems that when i was trying to increase the top coat thickness to get...
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    May i know what is the meaning of repeatability...

    May i know what is the meaning of repeatability of residual colour?

    I face another problem again, The AR coating i am getting is not uniform and the color is slightly difference from the previous...
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    May I know what is the effect if the chamber...

    May I know what is the effect if the chamber temperature is too low?
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    By the way, answer to your question. 1.This...

    By the way, answer to your question.

    1.This problem started since i having my uncoat lens coated with hardcoat.

    2.I have tested so many test, and even try to improved the cleaning method,...
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    i have tried the same process as well as ITO...

    i have tried the same process as well as ITO layer with uncoat lens and they appeared to be no problem at all. By the way, may i know what is the effect of the overcured lens? for example, curing...
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    Thanks to everybody who give me some opinion and...

    Thanks to everybody who give me some opinion and advice. The problem was solved.

    I had tried with the solution provided by Chris Ryser. This resulting the same problems with spider web shape...
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    May i know how long is your pre-curing time and...

    May i know how long is your pre-curing time and full-curing time.
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    110C of curing temperature? will the lens...

    110C of curing temperature? will the lens overcured? it seems kind of too hot for CR39 rite?
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    Reply to mauroventura The shape of defects is...

    Reply to mauroventura

    The shape of defects is whole surface with the spider web shape cracks. it happens to positive and negative lens.

    AR question.
    1. The AR material involved in the process...
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    Spider web crack on AR coating.

    I am a newbie in this field. I was bother by a problem which is quite important related to AR quality. I was coating the CR39 with thermal cured tintable hardcoat applied on it with SiO2 and ZrO2....
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