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1. (WO2007010822) ZOOM LENS SYSTEM AND IMAGING OPTICAL DEVICE USING THE SAME
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/010822 International Application No.: PCT/JP2006/313967
Publication Date: 25.01.2007 International Filing Date: 13.07.2006
IPC:
G02B 15/20 (2006.01) ,G02B 13/18 (2006.01) ,G02B 15/163 (2006.01) ,H04N 5/225 (2006.01)
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
15
Optical objectives with means for varying the magnification
14
by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
16
with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
20
having an additional movable lens or lens group for varying the objective focal length
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13
Optical objectives specially designed for the purposes specified below
18
with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
15
Optical objectives with means for varying the magnification
14
by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
16
with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
163
having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
5
Details of television systems
222
Studio circuitry; Studio devices; Studio equipment
225
Television cameras
Applicants:
松下電器産業株式会社 MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. [JP/JP]; 〒5718501 大阪府門真市大字門真1006 Osaka 1006, Oaza Kadoma, Kadoma-shi, Osaka 5718501, JP (AllExceptUS)
宮崎 恭一 MIYAZAKI, Kyoichi; null (UsOnly)
Inventors:
宮崎 恭一 MIYAZAKI, Kyoichi; null
Agent:
小笠原 史朗 OGASAWARA, Shiro; 〒5640063 大阪府吹田市江坂町1丁目23番101号 大同生命江坂ビル13階 Osaka Daido-Seimei Esaka Bldg., 13th Floor 1-23-101, Esakacho, Suita-shi Osaka 5640063, JP
Priority Data:
2005-20889419.07.2005JP
Title (EN) ZOOM LENS SYSTEM AND IMAGING OPTICAL DEVICE USING THE SAME
(FR) SYSTÈME D'OBJECTIF À FOCALE VARIABLE ET DISPOSITIF OPTIQUE DE TRAITEMENT D'IMAGE UTILISANT CELUI-CI
(JA) ズームレンズ系及びそれを備えた撮像光学機器
Abstract:
(EN) A zoom lens system includes a first lens group having a positive power from an object side to an image side, a second lens group having a negative power, and a third lens group having a positive power. An interval between each lens group is changed so as to change magnification. The second lens group has a lens element A having a negative power from the object side to the image side, a lens element B having an aspheric surface and a negative power, and a lens element C having a positive power. The zoom lens system satisfies condition [1]: 1.85 < NdA < 2.20; and condition [2]: 1.88 < NdC < 2.20 (wherein NdA is a refractivity of the lens element A with respect to d line and NdC is refractivity of the lens element C with respect to d line). With a small number of lens elements and simple structure, it is possible to provide a small-size and light-weight system having a low sensitivity and excellent aberration performance in which aberration caused by each lens element is small.
(FR) La présente invention concerne un système d'objectif à focale variable qui inclut un premier groupe de lentilles ayant une puissance positive à partir d'un côté objet vers un côté image, un deuxième groupe de lentilles ayant une puissance négative et un troisième groupe de lentilles ayant une puissance positive. Un intervalle entre chaque groupe de lentilles est modifié de manière à modifier l'agrandissement. Le deuxième groupe de lentilles comprend un élément de lentille A ayant une puissance négative à partir d'un côté objet vers un côté image, un élément de lentille B ayant une surface asphérique et une puissance négative, et un élément de lentille C ayant une puissance positive. Le système d'objectif à focale variable remplit la condition [1] : 1,85 < NdA < 2,20 ; et la condition [2] : 1,88 < NdC < 2,20 (dans lesquelles NdA est une réfringence de l'élément de lentille A par rapport à la ligne d et NdC est une réfringence de l'élément de lentille C par rapport à la ligne d). Avec un nombre réduit d'éléments de lentille et une structure simple, il est possible de mettre à disposition un système de petites dimensions et léger ayant une faible sensibilité et d'excellentes prestations en termes d'aberration, dans lequel l'aberration causée par chaque élément de lentille est faible.
(JA)  本発明のズームレンズ系は、物体側から像側へと順に、正のパワーを有する第1レンズ群と、負のパワーを有する第2レンズ群と、正のパワーを有する第3レンズ群とを少なくとも備えた複数のレンズ群からなり、各レンズ群の間隔を変化させて変倍を行い、該第2レンズ群が、物体側から像側へと順に、負のパワーを有するレンズ素子Aと、非球面を有し、かつ負のパワーを有するレンズ素子Bと、正のパワーを有するレンズ素子Cとを備え、条件(1):1.85<NdA<2.20及び(2):1.88<NdC<2.20(NdA:レンズ素子Aのd線に対する屈折率、NdC:レンズ素子Cのd線に対する屈折率)を満足し、少ないレンズ素子で簡単な構成であり、小型軽量であると共に、各レンズ素子による収差の発生量が少ない、低敏感度で優れた収差性能を有する。
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
JPWO2007010822US20090109547CN101223466JP4833975