From: koreth@hyperion.com (Steven Grimm)
Subject: TECH: How do head-up displays work?
Date: Thu, 25 Feb 93 15:09:27 PST


I've read that the cockpit displays in jet fighters and the like are
projected such that they can be seen clearly if the pilot looks off
into the distance (i.e., the pilot doesn't have to focus on the cockpit
window).  How is that done?  Is it just a matter of using lenses of
the appropriate curvatures, or is there something trickier going on?

-Steve