The principle of photo fixed-focus apparatus, GDDJ - 1, the analysis of precision and the way to improve the precision of the apparatus are discussed.
本文介绍了GDDJ-1光电定焦仪的工作原理，精度分析以及提高该仪器的精度办法。
The principle of photo fixed-focus apparatus, GDDJ - 1, the analysis of precision and the way to improve the precision of the apparatus are discussed.
本文介绍了GDDJ-1光电定焦仪的工作原理，精度分析以及提高该仪器的精度办法。
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