Follow the traditional evaluation method for the absolute testing of three optic flats, the result of the deviation can be evaluated by the deviation on two perpendicular diameters, its evaluation method is different from the true surface graph exactly.
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- 摘要按傳統三面互檢法評價(jià)平面度偏差，結果只能由評價(jià)平晶在兩條相互垂直的直徑線(xiàn)上的測量數值得到，其評價(jià)方法與平晶的真實(shí)面形偏差存在差異。
