The filter is compact, does not change the direction of optical beam, and can be applied to frequency-doubled laser.

这种旋光滤波器体积较小，且不改变光的原传播方向，是一种适用于倍频激光的滤波器。

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The beam quality of the frequency-doubled beam deteriorates seriously with the beam quality of basic frequency reducing.

发现随着基频光束模式变差，倍频光束质量严重恶化。

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A valid method to remove the frequency-doubled reflection peak is presented. A sample with good optical performance was fabricated successfully.

给出了消除倍频反射峰的有效方法，并成功制作出光学性能优良的样品。

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Microvision's current pico projection engine uses red and blue laser diodes and a frequency-doubled "synthetic" green laser to create a full color image.

ENGADGET: Microvision integrates direct green laser into pico projector prototype, completes RGB achievement