Scales:
20mm in 0.5mm
10mm in 0.1mm
1mm in 0.05mm
0.5" in 0.005"
1/8" in 1/64"
90°e scale in 0.5°, 80-90° in 0.1°
低反射鉻膜型號提供高對比度。相較於容易彎曲變形的膠片式分劃板,本玻璃分劃板更耐用。尺規位於分劃板的外部,直接接觸被測物體,可提供最佳調焦和精確測量。確定放大鏡的視場,然後再選擇分劃板。例如,對於12倍放大鏡的5⁄8”(16mm)視場來說,¾”(20mm)的尺規是不夠的。可使用紙巾及鏡片清潔劑來清洗分劃板。
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