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1.发明授权Stereoscopic optical viewing system with a shutter element adjacent the object lens 失效具有靠近物镜的快门元件的立体光学观察系统
公开(公告)号：US3261977A
公开(公告)日：1966-07-19
申请号：US13393861
申请日：1961-08-25
Applicant: LAB FOR ELECTRONICS INC
Inventor： VELDEN CORNELIUS G J M VAN DER
CPC classification number: A61B6/022 , G02B27/2264
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