公开(公告)号：EP0083196B1

公开(公告)日：1986-03-05

申请号：EP82306838.2

申请日：1982-12-21

申请人： SUMITOMO ELECTRIC INDUSTRIES LIMITED

发明人： Tada, Kohji c/o Osaka Works ,  Kuhara, Yoshiki c/o Osaka Works ,  Tatsumi, Masami c/o Osaka Works ,  Kawakami, Akihiko c/o Osaka Works

IPC分类号： G01R15/07 ,  G01R29/12

CPC分类号： G01R29/0885 ,  G01R15/242 ,  G01R29/12

公开(公告)号：EP0083196A1

公开(公告)日：1983-07-06

申请号：EP82306838.2

申请日：1982-12-21

申请人： SUMITOMO ELECTRIC INDUSTRIES LIMITED

发明人： Tada, Kohji c/o Osaka Works ,  Kuhara, Yoshiki c/o Osaka Works ,  Tatsumi, Masami c/o Osaka Works ,  Kawakami, Akihiko c/o Osaka Works

IPC分类号： G01R15/07 ,  G01R29/12

CPC分类号： G01R29/0885 ,  G01R15/242 ,  G01R29/12

摘要： A voltage and electric field measuring device using light, including a polariser (2), an electro-optic crystal (4) consisting of a material having an optical rotatory power, and an analyser (5) arranged in this order in the direction of advance of applied light. A quarter-wave plate (3) is disposed between the polariser (2) and crystal (4) or between the crystal (4) and analyser (5). The angle of orientation Ψ of the analyser (5), relative to the optical axis of the crystal (4), is set to the product of 0 and f, where θ represents the optical rotatory power, with respect to the applied light, of the crystal (4) near a point at the centre of a range of varying temperatures at the installation environment, and e represents the thickness of the crystal (4) measured in the direction of advance of light. The specified relation between Ψ and θ·ℓ maximises the temperature stability of the device by ensuring that the sensitivity of the device is substantially independent of temperature.