Optical Performance Of Reimaging Wide Field-Of-View (FOV) Telescope

The design and optical performance of a reimaging telescope with a 25 degree FOV that was constructed with off-the-shelf optical components is described. The wide field-of-view dictated the use of a field lens to prevent vignetting at the erector lens. Packaging restrictions on telescope length forced the use of low f-number lenses. Constraints on the selection of the erecting lens and the effects on optical performance of lens shape and position of a single element field lens are presented. The optical performance is shown to be limited by existing eyepiece designs.