Hi Mallik, you can use a surface profilometer to measure topology. There
are contact ones and non contact ones. My lab has a contact one that
just drags a stylus over the surface being measured (this kind is called
a stylus profilometer).

hope that helps,
Joe

mallikarjun kamavaram wrote:

>I WANT SOME ONE HELP ME IN COMPLETING MY PROJECT,
>AM WORKING ON SANDBLASTING PROCESS, AND I HAVE DESIGNED micro/milli
>CHANNELS ON GLASS AND I WANT TO KNOW HOW TO MEASURE THE DEPTH FO THE
>CHANNELS I MADE ON GLASS.
>I WANT SOME ONE TO TELL THE DEVICE OR METHOD WITH WHICH I CAN TAKE
>MEASUREMENTS.