相移法需要精密的移相装置，且需采集一幅以上的图像，在应用中受到一定限制。
Phase-shifting requires a precise Phase-shifting set and more than one image collected, therefore its application is limited.
其装置简单、运行可靠、移相触发范围宽，运用到实际生产中效果好。
The device is simple in construction, reliable operation and wide in phase-shift trigger. The device has good effect in practical production.
该标准装置采用高分辨率全数字移相技术和反馈控制技术，有效地提高了装置输出精度。
The high spatial resolution digital phase-shifting technology and feedback control technology were utilized in design of the device to improve its precision.
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