這是 FIR 指令的說明 ;/79tlwq
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At any conjugate, finite or infinite: ;UnJrP-if
EFL – Effective focal length ^tr?y??k
BFL – Back focal length Osk'zFiL<
FFL – Front focal length `p'(:W3a
FNO – f/number +%'!+r
l
IMG DIS– Actual image distance (SI-1 to SI) nF#1B4b>
OAL – Overall length (S1 to SI-1) A#@9|3
ANG – Object space last field angle (in degrees) :,f~cdq=
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PARAXIAL IMAGE li +MnLt
HT – Height on image surface gd,3}@@SH
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ENTRANCE PUPIL <pXF$a:s
DIA – Diameter 4owM;y
THI – Distance from S1 to pupil Ob~7r*q
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EXIT PUPIL |({ M8!BS
DIA – Diameter s{:l yp
THI – Distance from SI-1 to pupil F^/b!)4X
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Add at finite conjugates (if applicable): v"I#.{LiH=
RED – Reduction ratio {pR4+g
FNO – f/number at actual conjugate 7+Z%#G~T
OBJ DIS – Object distance (SO) <5t2 +D]]}
TT – Total track distance (SO to SI) _=Eb:n+X
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PARAXIAL IMAGE PCkQ hR
THI – Paraxial image distance (from SI-1) )b7 ;w#%q