G - Physics – 02 – B
Patent
G - Physics
02
B
88/113, 26/197,
G02B 26/08 (2006.01) B24B 13/015 (2006.01) B24B 13/06 (2006.01) B60R 1/00 (2006.01) B60R 1/08 (2006.01) F21V 7/00 (2006.01) G02B 5/08 (2006.01) G02B 5/10 (2006.01) G02B 27/00 (2006.01) G05B 19/4097 (2006.01) G05B 19/41 (2006.01)
Patent
CA 1319845
ABSTRACT Method and apparatus for generating compound shapes in optical surfaces needed to accommodate variable magnification, off-axis projection, reflection from diverse surfaces, reflector relay, intensity pattern requirements and othercomplex optical transform functions The present invention finds particular application in automotive rearview mirrors (either inside or outside mounted) where it is desired to view wide angles and in automotive headlights where it isdesired to illuminate specified targets with a desired or required intensity pattern. The present invention permits the realization of mirrors of such capability by providing a variable magnification mirror. The surface generation capabilities permit controlled magnification changes that nevertheless are still image forming and typically avoid the human eye focussing difficulties normally associated with variable magnification mirrors. The present invention includes a computer drivenreflector, design system which permits the designer to see the field of view, ray tracings, reflected beam intensity pattern and other data pertinent to a variable magnification mirror from entered mirror specifications. The effect of changes in specifications can be rapidly determined and a final design achieved through one or more such reiterations. The system further determines machine tool motional control for grinding a surface corresponding to the entered mirror specifications. A machining center having a high speed bit, a EDM tip and capable of producing the surface with optical quality precision is a further part of the invention. The ?ability of the invention in producing irregular optical shapes for these applications is utilized for the production of mirrors that accomplish complex focussing functions for use in off axis projection mirrors, relay mirrors, and headlamp reflector mirrors. According to the invention, optical systems capable of accomplishing such complex focussing can be realized with a single reflector.
580748
Tuck Richard G.
Windebank Robert W.
Optical Profile Inc.
Ridout & Maybee Llp
LandOfFree
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