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1. (WO2017039718) MAGNIFYING DEVICE

Pub. No.:    WO/2017/039718    International Application No.:    PCT/US2015/052141
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Sep 26 01:59:59 CEST 2015
IPC: G02B 27/01
G02B 13/00
Applicants: 3M INNOVATIVE PROPERTIES COMPANY
Inventors: YUN, Zhisheng
OUDERKIRK, Andrew J.
WONG, Timothy L.
MCDOWELL, Erin A.
AMBUR, Gregg A.
Title: MAGNIFYING DEVICE
Abstract:
A magnifying device such as binoculars or a microscope, including an optical system is described. The optical system includes an exit pupil, a reflective polariser ( 2427 ) proximate the exit pupil, a partial reflector ( 2417 ) disposed adjacent the reflective polariser opposite the exit pupil, and a quarter wave retarder ( 2425 ) disposed between the reflective polariser and the partial reflector. The reflective polariser is curved about two orthogonal axes and the partial reflector is spaced apart from the reflective polariser. The optical system is included in an eyepiece portion ( 2497 ) of the magnifying device which also uses an objective ( 2499).