In this paper, we obtained the formula of Nominal ocular hazard distance in the harm theories of lasers to eyes, and the principle of the nonlinear optical protective material was introduced.
根据激光对人眼损伤机理，给出了标识危害距离公式，并阐述了非线性光学防护材料的防护原理。
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The distance-to-go display feature allows the user to approach the next nominal position quickly and reliably, simply by traversing to a display value of zero.