Eyepiece

[0058]FIG. 1 shows a schematic illustration of an endoscope 10 comprising a distal end 12 and a proximal end 14. A straight and rigid shank 16 extends from the distal end 12 to the proximal end 14 of the endoscope 10. The direction of view 18 of the endoscope 10 can be adjusted within an angular range indicated in FIG. 1 by a bent double-headed arrow.

[0059]The endoscope 10 and the features thereof described above are substantially indicated by contours in FIG. 1. By contrast, the optical apparatuses described below are indicated in a side view. Depicted here in projection on the plane of the drawing are not only the external contours of the optical apparatuses, as become visible in the case of a section along a plane containing the optical axis, but also edges which arch out of the plane of the drawing, in particular with a circular arc shape. It is possible to identify, in particular, circular arc-shaped edges between arched light-entry surfaces or light-emergence surfaces on the one