发明公开
- 专利标题: MONOMORPH THIN FILM ACTUATED MIRROR ARRAY
- 专利标题(中): 单形性薄膜操作反射镜阵列
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申请号: EP96910308申请日: 1996-02-13
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公开(公告)号: EP0821806A4公开(公告)日: 1999-07-21
- 发明人: UM GREGORY
- 申请人: AURA SYSTEMS INC
- 专利权人: AURA SYSTEMS INC
- 当前专利权人: AURA SYSTEMS INC
- 优先权: US42414895 1995-04-17
- 主分类号: G02F1/015
- IPC分类号: G02F1/015 ; B81B3/00 ; G02B26/08 ; G02B26/00
摘要:
A thin film actuated mirror is disclosed having a substrate (16), a deformable structure (12) mounted to the substrate (16), and a mirror surface (17) interconnected to the deformable structure such that the mirror surface tilts in response to the deformation of the deformable material layer. The deformation occurs due to the effective strain gradient across the monomorph thickness which is accomplished by varying the electric field across the thickness or the strain parameter across the thickness. The deformable structure (12) includes an active material layer (18) fabricated from a semi-conductive ferroelectric ceramic material and two metal electrodes, each of the electrodes being mounted on opposing surfaces of the active material layer (18), wherein an electrical signal applied across the active material layer (18) between the electrodes causes deformation of the active material layer (18). Alternatively, the active material layer (18) may be fabricated from two layers, an upper layer (36) of an active piezoelectric material and a lower layer (38) of an inactive material.
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