A confocal system with two Toraldo pupil filters
双Toraldo光瞳的共焦系统

Toraldo pupil filter has been one of the most popular pupil filters. But its use is restricted because of the fabrication. In this article, we propose a confocal system with two Toraldo pupil filters. The function of a multi-zone Toraldo pupil filter, which is difficult to fabricate can be substituted by two relatively simple Toraldo pupil filters.