VARIABLE FOCAL DISTANCE LENS SYSTEM AND IMAGING DEVICE
A first lens unit and a third lens unit are constituted by a lens which is rotationally symmetrical with respect to an optical axis and are disposed on the same optical axis, a first freeform-curved surface lens and a second freeform-curved surface lens have the same shape and are disposed to be rot...
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| creator | KAMM, MARKUS MATSUI, TAKUMI WEICHELT, CHRISTIN OTAKE, MOTOYUKI ISHIOKA, MANABU USHIDA, HIROSHI |
| description | A first lens unit and a third lens unit are constituted by a lens which is rotationally symmetrical with respect to an optical axis and are disposed on the same optical axis, a first freeform-curved surface lens and a second freeform-curved surface lens have the same shape and are disposed to be rotated at 180 degrees with respect to the optical axis, the first freeform-curved surface lens and the second freeform-curved surface lens are movable in a Y-axis direction when the optical axes of the first lens unit and the third lens unit are set to be a Z-axis, an axis perpendicular to the Z-axis on an image surface is set to be a Y-axis, and an axis perpendicular to the Y-axis and the Z-axis on the image surface is set to be an X-axis, a refractive power of the second lens unit is variable due to the first freeform-curved surface lens and the second freeform-curved surface lens moving in opposite directions, and the first freeform-curved surface lens and the second freeform-curved surface lens are moved in the Y-axis direction in association with movement of some of lens groups constituting the first lens unit and the third lens unit when positional states of the lenses are changed from a wide angle end state in which a focal distance is shortest to a telephoto end state in which a focal distance is longest. |
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MATSUI, TAKUMI ; WEICHELT, CHRISTIN ; OTAKE, MOTOYUKI ; ISHIOKA, MANABU ; USHIDA, HIROSHI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US2022146799A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2022</creationdate><topic>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</topic><topic>OPTICS</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>KAMM, MARKUS</creatorcontrib><creatorcontrib>MATSUI, TAKUMI</creatorcontrib><creatorcontrib>WEICHELT, CHRISTIN</creatorcontrib><creatorcontrib>OTAKE, MOTOYUKI</creatorcontrib><creatorcontrib>ISHIOKA, MANABU</creatorcontrib><creatorcontrib>USHIDA, HIROSHI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>KAMM, MARKUS</au><au>MATSUI, TAKUMI</au><au>WEICHELT, CHRISTIN</au><au>OTAKE, MOTOYUKI</au><au>ISHIOKA, MANABU</au><au>USHIDA, HIROSHI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>VARIABLE FOCAL DISTANCE LENS SYSTEM AND IMAGING DEVICE</title><date>2022-05-12</date><risdate>2022</risdate><abstract>A first lens unit and a third lens unit are constituted by a lens which is rotationally symmetrical with respect to an optical axis and are disposed on the same optical axis, a first freeform-curved surface lens and a second freeform-curved surface lens have the same shape and are disposed to be rotated at 180 degrees with respect to the optical axis, the first freeform-curved surface lens and the second freeform-curved surface lens are movable in a Y-axis direction when the optical axes of the first lens unit and the third lens unit are set to be a Z-axis, an axis perpendicular to the Z-axis on an image surface is set to be a Y-axis, and an axis perpendicular to the Y-axis and the Z-axis on the image surface is set to be an X-axis, a refractive power of the second lens unit is variable due to the first freeform-curved surface lens and the second freeform-curved surface lens moving in opposite directions, and the first freeform-curved surface lens and the second freeform-curved surface lens are moved in the Y-axis direction in association with movement of some of lens groups constituting the first lens unit and the third lens unit when positional states of the lenses are changed from a wide angle end state in which a focal distance is shortest to a telephoto end state in which a focal distance is longest.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS |
| title | VARIABLE FOCAL DISTANCE LENS SYSTEM AND IMAGING DEVICE |
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