這是 FIR 指令的說明 ^&rbI,D
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At any conjugate, finite or infinite: Csc2 yI%3
EFL – Effective focal length ,6buo~?W:
BFL – Back focal length GKd>AP_
FFL – Front focal length 3CHte*NL=
FNO – f/number F_Pd\Aq8
IMG DIS– Actual image distance (SI-1 to SI)
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OAL – Overall length (S1 to SI-1) 86I*
ANG – Object space last field angle (in degrees) YWZF*,4
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PARAXIAL IMAGE O46/[{p+8
HT – Height on image surface P%lLKSA
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ENTRANCE PUPIL 5,((JxX$
DIA – Diameter H5I#/j
THI – Distance from S1 to pupil I.<#t(io
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EXIT PUPIL n{yjH*\Z
DIA – Diameter M:SxAo-D2
THI – Distance from SI-1 to pupil
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Add at finite conjugates (if applicable): UiEB?X]-l'
RED – Reduction ratio XHg%X
FNO – f/number at actual conjugate 3*TS
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OBJ DIS – Object distance (SO) t;1NzI$^
TT – Total track distance (SO to SI) e.GzGX
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PARAXIAL IMAGE {L eEnh-
THI – Paraxial image distance (from SI-1) ]O\W<'+V