From: "Mel Bartels" 
To: 
Reply-To: "Mel Bartels" 


I was asked in a private email the derivation of the deformed shape where:

1. glass considered thin meniscus of constant thickness (ex. 12 inch
diameter, 1/4 inch thick)

2. glass supported at extreme edge (supported inward better???)

3. glass facing upward towards zenith

What is the resulting shape?

Years ago Tom Lum and I derived this - and I cannot remember for certainty
if the shape is parabolic or spherical.

Can anyone take a stab or point to articles?

TIA Mel Bartels

--- BBBS/NT v4.00 MP