# 搭配使用成像鏡筒與遠場補正物鏡

(1)$$∅_1 \left[ \text{mm} \right] = 2 F_1 \cdot \text{NA}$$
(2)$$L \left[ \text{mm} \right] = \frac{\left(∅_2 - ∅_1 \right) F_2}{∅}$$

1 (mm) = 物鏡出瞳直徑
2 (mm) = 成像鏡筒入瞳直徑
F1 (mm) = 物鏡焦距
F2 (mm) = 成像鏡筒焦距
NA = 物鏡數值孔徑

## 示例：

(3)$$∅_1 = 2 \cdot 20 \text{mm} \cdot 0.28 = 11.2 \text{mm}$$

2/3”影像感測器具有11mm對角距離，因此Ø需要至少為11mm。MT-1成像鏡筒的焦距為200mm，而入瞳直徑為24mm。因此，

(4)$$L = \frac{ \left( 24 \text{mm} - 11.2 \text{mm} \right) 200 \text{mm} }{11 \text{mm}} = 232.7 \text{mm}$$

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