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1“的sensor的直径为什么是16mm,而不是25.4mm?-云破天开
作者:yptk · 2022-11-08 · via 相机 – 云破天开

为什么1“的sensor的直径是16mm,而不是25.4mm?

At present, small sensors are named after the dimensions of a hypothetical glass tube that would surround the sensor, as if they were a 1950’s Vidicon tube.
即,上世纪50年代的显像管,传感器部分需要真空封装在玻璃管里。

因此1”的显像管的直径是25.4mm,包含了玻璃管部分的尺寸。而实际成像部分的直径只有16mm。如今CCD/CMOS不再需要封装玻璃,但仍然把成像部分直径为16mm的传感器,称为1“传感器。

参考:

https://www.dpreview.com/articles/4159871805/making-sensor-sizes-less-misleading

https://baijiahao.baidu.com/s?id=1717852383403723510&wfr=spider&for=pc

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