A new spherometer based on self-reference laser shearing interferometric technique is described The principles and error analysis of the spherometer are given in detall.

本文根据自参考剪切干涉技术，采用球面补偿自准直原理，提出了一种新型激光干涉球径仪。

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Holograms are interference patterns generated by the interaction of a blank reference laser beam with a second beam that has been reflected from an object of interest.

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To create a hologram, such as those typically seen on credit cards, a laser beam is split into two (an object beam and a reference beam).

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