A COMMON OPTICAL PATH INTERFEROMETRIC GAUGE
    1.
    发明申请
    A COMMON OPTICAL PATH INTERFEROMETRIC GAUGE 审中-公开
    普通光路干涉仪

    公开(公告)号:WO1987001438A1

    公开(公告)日:1987-03-12

    申请号:PCT/US1986001798

    申请日:1986-09-02

    Abstract: A common optical path interferometric gauge comprises an optical beam (14) that is split into two beams. Both beams are modulated and recombined after introducing an optical path length difference greater than the coherence length of the optical source (12). The combined beam is guided along a common optical path (46) and is subsequently split into reference and measurement beams. The measurement beam is guided along a measurement optical path that includes a moving workpiece surface (60). Both beams are recombined after interposing an optical path length difference therebetween so as to reestablish coherence between portions thereof producing optical interference indicative of the surface (60) movement.

    A COMMON OPTICAL PATH INTERFEROMETRIC GAUGE
    2.
    发明授权
    A COMMON OPTICAL PATH INTERFEROMETRIC GAUGE 失效
    普通光路干涉仪

    公开(公告)号:EP0241512B1

    公开(公告)日:1992-04-01

    申请号:EP86906044.2

    申请日:1986-09-02

    Abstract: A common optical path interferometric gauge comprises an optical beam (14) that is split into two beams. Both beams are modulated and recombined after introducing an optical path length difference greater than the coherence length of the optical source (12). The combined beam is guided along a common optical path (46) and is subsequently split into reference and measurement beams. The measurement beam is guided along a measurement optical path that includes a moving workpiece surface (60). Both beams are recombined after interposing an optical path length difference therebetween so as to reestablish coherence between portions thereof producing optical interference indicative of the surface (60) movement.

    A COMMON OPTICAL PATH INTERFEROMETRIC GAUGE
    3.
    发明公开
    A COMMON OPTICAL PATH INTERFEROMETRIC GAUGE 失效
    与公共光路上INTERFEROMETERLEHRE。

    公开(公告)号:EP0241512A1

    公开(公告)日:1987-10-21

    申请号:EP86906044.0

    申请日:1986-09-02

    Abstract: Une jauge interférométrique à chemin optique commun comprend un faisceau optique (14) qui est divisé en deux faisceaux. Les deux faisceaux sont modulés et combinés après introduction d'une différence de longueur de chemin optique supérieure à la longueur de cohérence de la source optique (12). Le faisceau combiné est guidé le long d'un chemin optique commun (46) et divisé ultérieurement en des faisceaux de référence et de mesure. Le faisceau de mesure est guidé le long d'un chemin optique de mesure qui comprend une surface d'une pièce à usiner en mouvement (60). Les deux faisceaux sont recombinés après interposition d'une différence de longueur de chemin optique entre les deux de manière à rétablir la cohérence entre leurs portions pour produire une interférence optique indiquant le mouvement de la surface (60).

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