Jolo

Jolo8

A catadioptric Yolo design using 2 tilted correcting lenses

I’ve put the Chief correcting lenses in most telescope designs I could think of including the Yolo giving it the name “Jolo”.  One of the difficulties of making a Yolo is the toroidal secondary mirror.  Two correcting lenses can eliminate the need for a toroid or needing to warp the secondary.  Surprisingly the two correcting lenses are tilted in the same direction unlike the Chief.   This is because only astigmatism is being corrected.  I still havent made one yet even though the spot diagrams are very good.  Below is a design you can build or scale up.

Jolo4

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