The ray tracing matrices are explained, emphasizing the reflection matrix. I find the system matrix for a Cassegrain telescope with an eyepiece and use it to compute the correct location of the eyepiece. The result is confirmed by simulating it in FRED.

Although suitable to watch alone, this is a continuation of the video: [ Ссылка ]

FRED is a product of Photon Engineering, [ Ссылка ]

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References include:
Eugene Hecht, Optics, 4th ed. (Addison-Wesley, 2001)

J. Geary, Lens Design, Introduction to Lens Design: With Practical Zemax Examples, (Willmann-Bell, 2002)

Pedrotti, Pedrotti, and Pedrotti, Introduction to Optics, 3rd ed. (Pearson, 2007)

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