Equations and corresponding legends for each of our EO Tech Tools.
FOS |
Power of Surface 1 |
FIS |
Power of Surface 2 |
F |
Lens Power |
nOS |
Object Space Index |
nL |
Lens Index |
nIS |
Image Space Index |
R1 |
Radius of Surface 1 |
R2 |
Radius of Surface 2 |
CT |
Center Thickness |
P |
Primary Principle Point |
P' |
Secondary Principle Point |
EFL |
Effective Focal Length |
BFL |
Back Focal Length |
FFL |
Front Focal Length |
NPS |
Nodal Point Shift |
fF |
Front Focal Point |
fR |
Rear Focal Point |
? |
Wavelength |
zR |
Rayleigh Range |
z |
Axial Distance |
?(z) |
Half Beam Diameter |
?0 |
Beam Waist |
b |
Confocal Parameter |
?R |
Rayleigh Half Diameter |
R(z) |
Radius of Curvature |
? |
Half Angle Divergence |
d1 |
Source to Lens 1 Distance |
d2 |
Lens 1 to Lens 2 Distance |
d3 |
Lens 2 to Spot Diameter Distance |
DL1 |
Diameter of Lens 1 |
DL2 |
Diameter of Lens 2 |
FL1 |
Focal Length of Lens 1 |
FL2 |
Focal Length of Lens 2 |
Dsource |
Source Diameter |
Dspot |
Spot Diameter |
NAinput |
Input Numerical Aperture |
NAoutput |
Output Numerical Aperture |
DI |
Input Beam Diameter |
DO |
Output Beam Diameter |
?I |
Beam Divergence |
L |
Working Distance |
R |
Radius of Curvature |
D |
Diameter |
MP |
Magnifying Power |
FL |
Focal Length |
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