PROJECTION LENS BARREL AND PROJECTOR

WIPO Patent Application WO/2016/104331

A1

This projection lens barrel is provided with a projection optical system for forming an image from imaging light on a target projection surface, the projection optical system having a plurality of lenses, and a reflecting optical element for bending the optical axis between the lenses. A section lying towards the target projection surface from midpoint in the projection optical system includes at least a reflecting optical element, and a lens situated farther towards the target projection surface side from the reflecting optical element, and constitutes a rotating part capable of rotation centered on the incident light axis with respect to the reflecting optical element. By decentering the at least one lens included in the rotating part, there is constituted a partial blur correction lens group that changes the slope of the projected image plane of imaging light about the incident light axis with respect to the reflecting optical element.

FUJII SHUICHI (JP)
JIN MAKOTO (JP)
SHIBATANI KAZUHIRO (JP)
TANIGAWA YUTAKA (JP)
NISHIGAMI NAOTAKA (JP)
SAITO MASATAKA (JP)

PCT/JP2015/085383

June 30, 2016

December 17, 2015

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KONICA MINOLTA INC (JP)

G02B7/02; G02B7/28; G02B7/30; G02B15/20; G03B21/14; H04N5/74

JP2011085922A	2011-04-28
JP2006113315A	2006-04-27
JP2014044319A	2014-03-13
JP2003204495A	2003-07-18

SANO PATENT OFFICE (JP)
Patent business corporation Sano patent firm (JP)

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