Transfer lens for optical image display system

Details Transfer lens for optical image display system Transfer lens for optical image display system

G - Physics

02

B

88/106

G02B 9/36 (2006.01) G02B 9/58 (2006.01) G02B 13/16 (2006.01)

Patent

CA 1127894

"TRANSFER LENS FOR OPTICAL IMAGE DISPLAY SYSTEM" ABSTRACT A transfer lens comprises a first field-flattening component of negative power, a second component of positive power providing overcorrect astigmatism, a third component of positive power consisting of a plurality of positive members providing most of the power of the overall lens and whose under- correct astigmatism is corrected by the overcorrect astigmatism of the second component, and a fourth component of negative power which increases the field angle. The lens is particular- ly useful in a head-down display having two primary displays from which light travels to a combiner so that the transfer lens produces a combined image. A Fresnel field lens is prefer- ably located at the image position.

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