Liquid Crystal-based Polarization Modulators

The FPM (Fast Polarization Modulator) series consists of liquid crystal based polarization modulators, which are able to vary the polarization of the transmitted light by an external voltage very fast. The components work vibration-free without moving components. This technique is used in Active retarder 3D displays.

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    Fast Polarization Modulators – Models

    ModelNumber of
    polarization
    output states
    TransmittancePolarization
    contrast*
    Response time**
    (T100-T10)
    Relaxation time**VD
    FPM(L)2≥ 43.5 %≥ 60:1
    ≥ 1,800:1
    ≤ 6 ms≤ 30 ms4 V
    FPM(L)-NIR(1100)2≥ 40.0 %≥ 200:1
    ≥ 300:1
    ≤ 5 ms≤ 15 ms5 V
    X-FPM(L)2≥ 43.5 %≥ 20:1
    ≥ 1,800:1
    ≤ 30 µs≤ 1.8 ms24 V
    X-FPM(4L)4≥ 41.0 %≥ 120:1
    ≥ 30:1
    ≥ 500:1
    ≤ 30 µs≤ 1.8 ms24 V
    X-FPM(L)-LASunder development
    PolarSpeed-M(L)2≥ 42.0 %≥ 20:1
    ≥ 120:1
    ≤ 30 µs≤ 30 µs24 V
    VPRcontinuous≥ 41.0 %≥ 75:1 all outputs≤ 10 ms all output changes ≥ 20°≤ 10 ms all outputs
    ≥ 20°
    9 V

    * The polarization contrast is defined as the ratio of the desired polarization to the orthogonal component. The lower value applies to the polarization at applied voltage. The higher value applies to polarization without applied voltage.
    ** The switching time is defined as the time required to switch from polarization without applied voltage to polarization with applied voltage.
    The relaxation time is defined as the time required to switch from polarization with applied voltage to polarization without applied voltage.

    Sizes

    Standard sizeOuter dimensionsClear aperture
    7x87,0 mm x 8,2 mm5.0 mm x 5.0 mm
    13x1513,0 mmx 15,0 mm9.8 mm x 9.8 mm
    1x125.4 mm x 25.4 mm22.2 mm x 20.2 mm
    2x250.8 mm x 50.8 mm47.6 mm x 45.6 mm
    D1 (circular)25.4 mm diameter22.2 mm diameter
    D2 (circular)50.8 mm diameter47.0 mm diameter