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[OM] coatings

Subject: [OM] coatings
From: Joseph Albert <jalbert@xxxxxxx>
Date: Thu, 1 Oct 1998 04:27:55 -0600 (MDT)
>No coating can make glass transmit more light.

actually, I believe that they do.  it is not that they make the glass
transmit more light but that they prevent some of the light from being
reflected at the surface.  air-glass interfaces are terrible for
reflections.  coating-glass interface is much better and air-coating
interface is much better, hence a coated lens transmits more light
than an uncoated one.

Joseph

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