Paraxial Ray Trace Equations and Building a YNU Spreadsheet, with an Example

[@stephenremillard1]

The formula that appears at 20:26 is -E10/E12, not -E10/E11.

[@shaibenyaish2147]

great video, thank you very much, this one is must to any sequential optical designer.

[@SurajGupta]

very informative video. I got the concept of ynu by this video

[@limingliu8419]

Great video, could you pls explain how to get optical length as in Zemax? Thanks~