Image-forming optical system

专利名称：Image-forming optical system发明人：Tetsuo Nagata申请号：US10025896申请日：20011226

公开号：US20020159158A1公开日：20021031

专利附图：

摘要：A high-performance and low-cost image-forming optical system has a reducednumber of constituent optical elements and is made extremely thin, particularly in adirection perpendicular to an image pickup device, by folding an optical path using onlythree reflecting surfaces. The image-forming optical system has a front unit including a

first prism an aperture stop and a rear unit including a second prism The first prism has afirst transmitting surface a first reflecting surface and a second transmitting surface Thesecond prism has a first transmitting surface a first reflecting surface a second reflectingsurface and a second transmitting surface An optical path incident on the first reflectingsurface and an optical path exiting from the second reflecting surface intersect eachother. The first reflecting surface of the first prism and the first and second reflectingsurfaces and of the second prism have a curved surface configuration that gives a powerto a light beam. The curved surface configuration is a rotationally asymmetric surfaceconfiguration that corrects aberrations due to decentration.

申请人：NAGATA TETSUO

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