REFLECTING PHOTOGRAPHIC LENS

WIPO Patent Application WO/2014/083956

A1

A reflecting photographic lens comprises, in order from the object side, a first reflecting mirror, a second reflecting mirror, a third reflecting mirror, and a fourth reflecting mirror, positioned such that light from the object forms an object image in a prescribed image plane after being reflected in order by the first reflecting mirror, the second reflecting mirror, the third reflecting mirror, and the fourth reflecting mirror. The first through fourth reflecting mirrors have reflecting surfaces of rotationally asymmetrical astigmatic surface shapes, and are configured being symmetric with relation to a reference plane which is perpendicular to the image plane, including a first reference axis which is defined by a normal which passes through the center of the image plane. The first reflecting mirror has a concave surface facing the direction of entry of light. The first reflecting mirror and the second reflecting mirror are inclined in the same direction with respect to an orthogonal plane which is orthogonal to the first reference axis. The third reflecting mirror and the fourth reflecting mirror are inclined in the opposite direction to the first reflecting mirror with respect to the orthogonal plane. The second reflecting mirror and the third reflecting mirror are eccentrically positioned on the same side within the reference plane with respect to the first reference mirror.

SUGIYAMA YOSHIKAZU (JP)

PCT/JP2013/078081

June 05, 2014

October 16, 2013

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NIKON CORP (JP)

G02B17/06; G02B17/08

JP2004133378A	2004-04-30
JP2005241682A	2005-09-08
JP2006215172A	2006-08-17
JPS58205124A	1983-11-30
JPH09222561A	1997-08-26

NAGAI, Fuyuki et al. (JP)
Fuyuki Nagai (JP)

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