Gradual rigidity leaf spring has variable rigidity feature, that causes little or nearly no change on offset frequency.

渐变刚度钢板弹簧具有刚度可变的特性，可使偏频变化很小或接近等频特性。

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For a fixed offset, frequency response of the phase of dominant aperture field mode tends to be smoother with the increase of tilt whereas converse conclusion can be drawn for that of the amplitude.

而在横向偏置相同的条件下，倾角越大，基模电场的相位随频率的变化越平缓，幅度则正好相反。

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For a fixed offset, frequency response of the phase of dominant aperture field mode tends to be smoother with the increase of tilt whereas converse conclusion can be drawn for that of the amplitude.

而在横向偏置相同的条件下，倾角越大，基模电场的相位随频率的变化越平缓，幅度则正好相反。

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