It is the distance between the lens diaphragm and the image plane.
即是镜头光圈与影像平面之间的距离。
The optical system of the micro digital sun sensor consists of APS CMOS image sensor and MEMS based diaphragm with pinhole array structure.
微型数字式太阳敏感器光学系统由APS CMOS图像传感器和基于MEMS工艺的小孔阵列式光线引入器组成。
Built-in optical system and adjustable iris diaphragm with clear image.
内置式显微光学系统及光栏，像质清晰。
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