[求助]请问背焦距离是啥意思？ [复制链接]

问题如题，请懂的行家不吝赐教~谢谢了~ @4C
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沙发，不懂小白路过

BFL back focal length >'
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ZEMAX defines the back focal length as the distance along the Z axis from the last surface made of glass to the paraxial image plane for the object at infinite conjugates. If no surfaces are made of glass, the back focal length is the distance from surface 1 to the paraxial image plane for the object at infinite conjugates. Jpq~  

应该就是常说的“后焦距”吧

我觉得也是后焦距

BACK FOCUS 后焦，最后一个镜片最后一个面到相面距离

。。。吓唬人，翻译啊啊啊 啊

是后焦距吧 童鞋

翻译确实蛮吓人的。。。唉。。。多谢各位啦！

有回答，就是好的。。。。