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re: equation for parabolic reflector

---------- Forwarded message ----------
Date: Sat, 01 Mar 1997 13:02:16 +0800
From: "Lam, Shing" <shlam at eee_hku.hk>
Organization: The University of Hong Kong
To: Aquatic-Plants at actwin_com
Subject: Re: Equation for Parabolic Reflector

A good reference is

Author
           Elmer, William B. 
Title
           The optical design of reflectors
Edition
           3rd ed.
Imprint
           Salem, MA : TLA Lighting Consultants, c1989

For normal aquarium hood with fluorescent tube, the 
shape of the optimal cross section of the reflector
(so called small reflector) is somewhat like the "M" 
logo of McDonalds.

Shing Lam
Hong Kong