primary focal plane 中文意思是什麼
primary focal plane
解釋
前焦平面-
The primary mirror. this is the paraboloidal mirror at the bottom of the tube. it has an aluminized surface that reflects starlight to form an image at the focal plane
主鏡。是位於鏡筒底部的一塊拋物面鏡。表面鍍鋁膜,將星光反射到焦平面上成像。 -
To minimize harmful diffraction effects, the secondary, or diagonal, mirror is generally only large enough to let the central portion of the focal plane receive light from the whole primary mirror
為減小不利的衍射效應,副鏡,或平面鏡的大小隻是剛夠把主鏡在焦平面的像反射就行了。
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