发明名称 Security viewer
摘要 PCT No. PCT/GB85/00417 Sec. 371 Date May 12, 1986 Sec. 102(e) Date May 12, 1986 PCT Filed Sep. 12, 1985 PCT Pub. No. WO86/01908 PCT Pub. Date Mar. 27, 1986.A security viewer to be mounted through a non-transparent partition, e.g. a door (7), comprises a housing (1) which extends through the door. The housing includes an inlet aperture (8), a screen (13) and a lens system (9, 10, 11, 12). The lens system forms a real image on the screen (13) of a field of view outside the door. Thus, an observer on the inside of the door can observe the real image without the need to place his eye against the viewer. The viewer is held in place by bezels (18, 19) which are glued in place on opposite sides of the door. The bezel (18) is slidable along the housing (1) to accommodate different door thicknesses.
申请公布号 US4726670(A) 申请公布日期 1988.02.23
申请号 US19860862104 申请日期 1986.05.12
申请人 SHERRARD, WILLIAM D. 发明人 SHERRARD, WILLIAM D.
分类号 G02B25/04;(IPC1-7):G02B7/02;G02B23/16 主分类号 G02B25/04
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