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第一章 光学显微镜
第0节 预备知识
Thin Lenses
paraxial rays, in air
11 so si
if the lens is “thin,” then
(nlens
1)
1
R1
1 R2
Thin Lens Equation
11 1
so si
f
Gaussian Lens Formula
cancel some aberrations
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Collection Efficiency
22
We Forgot Collection Efficiency
So, now we couple this system, and find out that we have too little light striking the tissue … what went wrong?
optic axis
15deg sin(.262 rad) 0.259 10 deg: sin(.175 rad) 0.174 5 deg: sin(.873 rad) 0.872 1 deg: sin(30.5 mrad) 30.5 E-3
30 deg: sin(.524 rad) .5 45 deg: sin(.785 rad) .707
object is REAL
when rays diverge from object:
so
so > 0
object is VIRTUAL when rays converge to object:
so < 0 so
usually only with lens combination1s7