| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high performance, small sized and light-weight zoom lens for three-dimensional image capturing having a wide angle, high magnification as well as a bright F-number in an optical system optically synthesizing parallax videos fetched from a pair of right and left optical systems and imaging on one imaging element. <P>SOLUTION: An optical system for three-dimensional image capturing which serially and alternately forms videos having two different parallaxes for the right and the left eyes on one imaging element IP includes a front optical system having: a pair of 1f lens groups 201 with negative refractive power; a pair of optical paths deflection means 203; and an optical paths synthesizing means 205 for synthesizing the two optical paths on the same optical axis from the object side in this order and a back optical system having: 1b lens group 206 which is fixed during variation of power with positive refractive power; a lens group 207 moved during variation of power; and a diaphragm 208. The front optical system includes a pair of light amount control means 202 arranged in the optical paths for the right and left eyes up to the optical paths synthesizing means for alternately switching the right and left subject images by time-division and suitably setting the power arrangement in the 1f lens group and the 1b lens group. <P>COPYRIGHT: (C)2012,JPO&INPIT |
