Equations and corresponding legends for each of our Edmund Optics 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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