06952312 is referenced by 140 patents and cites 37 patents.

A head-up display includes a projection system and a window having a target area where a reflective polarizer is positioned to reflect light from the projection system to a viewing area. Light from the projection system is p-polarized and strikes exposed window surface(s) at an acute angle to reduce or eliminate multiple or “ghost” images. The acute angle is closely matched to a Brewster angle of the exposed window surface(s). The reflective polarizer includes a multilayer stack with refractive indices of individual layers chosen to reflect p-polarized light substantially more than s-polarized light over a wide angular range that includes the acute angle. The reflective polarizer also can reflect infrared light to reduce cabin heating from solar radiation.

Title
Head-up display with polarized light source and wide-angle p-polarization reflective polarizer
Application Number
10/335458
Publication Number
6952312 (B2)
Application Date
December 31, 2002
Publication Date
October 4, 2005
Inventor
Jonathan Brodd
St. Paul
MN, US
John A Wheatley
Lake Elmo
MN, US
Andrew J Ouderkirk
Woodbury
MN, US
Michael F Weber
Shoreview
MN, US
Agent
Stephen C Jensen
Milena G Higgins
Assignee
3M Innovative Properties Company
MN, US
IPC
B60K 035/00
G02B 027/14
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