Search this site
Navigate
Welcome to Optics Realm!
Videos
Zemax Tutorials
Zemax 1 - Lens Data Editor
Zemax 2 - Aperture Settings
Zemax 3 - Negative Thicknesses
Zemax 4 - Wavelength, Field and Lens Layouts
Zemax 5 - Paraxial to Real Lens Layout
Zemax 6 - Focusing, Merit Function Editor, Optimization
Zemax 7 - Finding Cardinal Points
Zemax 8 - Fold Mirrors
Zemax 9 - Axial Color
Zemax 10 Design a Doublet
Zemax 11 Secondary Color
Zemax 12 - Stops and pupils
Optics Tutorial Videos
Tutorial 1 - What is light and how to manipulate it
Tutorial 2 - Lens and focusing basics
Tutorial 3 - Algebraic Imaging through a Lens
Tutorial 4 - Imaging Nomograph
Nomograph Editorial
Tutorial 5 - Near collimated beams & Newton's Equation
Tutorial 6 - Chief and Marginal Rays, YNU
Tutorial 7 - Fnum, FOV, window
Tutorial 8 - Cardinal Points
Tutorial 9 - Axial Color
Tutorial 10 - Achromatic Doublet
Tutorial 11 - Secondary color
Tutorial 12 - Stops and pupils
Tutorial 13 - Field Stops and Pupil Matching
Pilot Video
Miscallaneous Videos
Lens Design Cycle Time
Doublet Fabrication
Double Gauss Evolution / Zemax Surface Solves
Technical Information
Optics Information
Asphere Tolerancing
Aspheres
Design Configuration starting points
Color Correction
V number (Abbe Number if visible)
Predicting Axial Color
How an achromat works
Secondary Color and Partial Dispersion
Doublet Equivalent V and P
Thermal Defocus
Atherm Editorial
Thermal Prescription Changes
Example - thermally cycle an aspheric term
Thermal Index changes
Thermal Power changes
Thermal focus change
Thermal Defocus in a Housing
Passively Athermal Doublet
Color and Passive Atherm
Passive Atherm and Color Correction Nomograph
Passive Athermalization Color Correction in a Housing
Three Elment Solution
Top 10 Optics Equations
1. Conservation of Energy
2. First Order Imaging
Imaging Nomograph
Lens Makers Equation (Cartesian)
Lens makers equation empirical
3. Magnification
4. Diffraction Limited Metrics
5. Sag Equation
6. Field of View
7. Fresnel Reflection
8. Spatial Frequency Cuttoff
9. Window Defocus
10. Thin Wedge Deviation
Diffraction Coefficients: Converting from Code V to Zemax and Back
Spectral Lines, Spectrum
Opto-Mech
Z-Factor (Lens Centerability)
Contact Height
Contact Stress
Downloads!
Contributors
Corporate Transparency
Scott S.
Development Blog
Dan S.
EduardoG
Eric H
Dan D.
Links (related sites)
Optics References
Give us Feedback!
Sitemap
Follow:
iTunes
scott.sparrold@gmail.com
Welcome to Optics Realm!
>
Technical Information
>
Optics Information
>
Top 10 Optics Equations
>
9. Window Defocus
Written by Scott Sparrold
A converging wavefront (focusing beam) will have a focus shift of ΔF caused by a window of thickness T and index of refraction, n:
This is independent of F/#