From: "Alfredo Neves" 
To: 
Reply-To: "Alfredo Neves" 


Hi,

I've been using a test which is a cross between the caustic test and a
hartman test. Using a mask with holes over the mirror and a caustic tester,
I perform two sets of measurements. The first just a bit inside ROC, where
I record the lateral (side ways) positions where each hole darkens to a
minimum. Next I move a fixed amount to the outside ROC and also measure the
position where each hole darkens. With the two sets of measurements and the
distance between the two ROC, I calculate the ROC of each zone as you would
with a hartman test. The advantage is no grey matching and no complex
numeric computation as in the caustic test. Can any one comment on this
procedure.

Alfredo

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