JPS61132750U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案の一実施例による回転検出装
置を示す構成図、第２図はこの考案の他の実施例
を示す回転検出装置の構成図、第３図は従来の回
転検出装置を示す構成図である。図において、１
は回転軸、２２は歯車（回転体）、２３は圧電素
子部、１６は光変調器、５は容器である。なお各
図中、同一符号は同一、または相当部分を示す。 Fig. 1 is a block diagram showing a rotation detection device according to one embodiment of this invention, Fig. 2 is a block diagram of a rotation detection device showing another embodiment of this invention, and Fig. 3 shows a conventional rotation detection device. FIG. In the figure, 1
22 is a rotating shaft, 22 is a gear (rotating body), 23 is a piezoelectric element section, 16 is an optical modulator, and 5 is a container. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

【実用新案登録請求の範囲】 (1) 回転軸に装着され所定の歯数の歯部を有す
る回転体、この回転体の少なくとも１個の上記歯
部と接触し電圧を発生する圧電素子、この圧電素
子の出力で光を変調し、上記光の導入部と導出部
を有する光変調器、この光変調器と上記圧電素子
部とを収容した容器を備えた回転検出装置。 (2) 実用新案登録請求の範囲第１項において、
光変調器は光の導入及び導出用の一対のレンズと
、上記導入用レンズと対向した偏光子と、上記導
出用レンズと対向した検光子と、この検光子と上
記偏光子との間に配置されたポツケルス素子と、
このポツケルス素子と上記検光子あるいは偏光子
との間に配置された１／４波長板とで構成された
回転検出装置。 (3) 実用新案登録請求の範囲第２項において、
ポツケルス素子が圧電素子を兼ねた回転検出装置
。[Claims for Utility Model Registration] (1) A rotating body that is mounted on a rotating shaft and has a predetermined number of teeth, a piezoelectric element that comes into contact with at least one of the teeth of this rotating body and generates a voltage, and A rotation detection device comprising: an optical modulator that modulates light with the output of a piezoelectric element and has a light introduction section and a light output section; and a container housing the optical modulator and the piezoelectric element section. (2) In paragraph 1 of the claims for utility model registration,
The optical modulator includes a pair of lenses for introducing and deriving light, a polarizer facing the introduction lens, an analyzer facing the deriving lens, and disposed between the analyzer and the polarizer. The Pockels element is
A rotation detection device comprising this Pockels element and a quarter wavelength plate placed between the analyzer or polarizer. (3) In paragraph 2 of the claims for utility model registration,
A rotation detection device in which a Pockels element also serves as a piezoelectric element.