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1. WO2021142837 - PROJECTION LENS

Publication Number WO/2021/142837
Publication Date 22.07.2021
International Application No. PCT/CN2020/073022
International Filing Date 19.01.2020
IPC
G02B 13/00 2006.1
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
G02B 13/06 2006.1
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
06Panoramic objectives; So-called "sky lenses"
G03B 21/14 2006.1
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
21Projectors or projection-type viewers; Accessories therefor
14Details
CPC
G02B 13/00
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
G02B 13/06
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
13Optical objectives specially designed for the purposes specified below
06Panoramic objectives; So-called "sky lenses" ; including panoramic objectives having reflecting surfaces
G03B 21/14
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
21Projectors or projection-type viewers; Accessories therefor
14Details
Applicants
  • 诚瑞光学(常州)股份有限公司 AAC OPTICS (CHANGZHOU) CO., LTD. [CN]/[CN]
Inventors
  • 石荣宝 SHI, Rongbao
Agents
  • 广东广和律师事务所 GUAGDONG GUANGHE LAW FIRM
Priority Data
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) PROJECTION LENS
(FR) LENTILLE DE PROJECTION
(ZH) 投影镜头
Abstract
(EN)
The present invention provides a projection lens, comprising, in order from an object side to an image side: a first lens having positive refractive power, a second lens having positive refractive power, a third lens, and a fourth lens having positive refractive power. The focal lens of the projection lens is f, the focal length of the first lens is f1, the focal lens of the second lens is f2, the radius of curvature of an object side surface of the second lens is R3, the radius of curvature of an image side surface of the second lens is R4, the refractive index of the second lens is n2, and the following relational expressions are satisfied: 0.80≤f2/f≤1.50; 1.67≤n2≤2.20; 1.20≤f1/f≤2.00; and 4.50≤(R3+R4)/(R3-R4)≤15.00. The projection lens provided by the present invention has good optical properties, and also meets wide-angle and ultra-thin design requirements.
(FR)
La présente invention concerne une lentille de projection, comprenant, séquentiellement du côté objet au côté image : une première lentille ayant une puissance réfractive positive, une deuxième lentille ayant une puissance réfractive positive, une troisième lentille ayant une puissance réfractive positive et une quatrième lentille ayant une puissance réfractive négative. La longueur focale de la lentille de projection est f, la longueur focale de la première lentille est f1, la longueur focale de la deuxième lentille est f2, le rayon de courbure d'une surface côté objet de la deuxième lentille est R3, le rayon de courbure d'une surface côté image de la deuxième lentille est R4 et les expressions relationnelles suivantes sont satisfaites : 0,80 ≤ f2 / f ≤ 1,50 ; 1,67 ≤ n2 ≤ 2,20 ; 1,20 ≤ f1 / f ≤ 2,00 ; et 4,50 ≤ (R3 + R4) / (R3-R4) ≤ 15,00. La lentille de projection selon la présente invention présente de bonnes propriétés optiques, et répond également aux exigences de conception à grand angle et ultra-mince.
(ZH)
本发明提供了一种投影镜头,其自物侧至像侧依序包含:具有正屈折力的第一透镜,具有正屈折力的第二透镜,第三透镜,以及具有正屈折力的第四透镜;投影镜头的焦距为f,第一透镜的焦距为f1,第二透镜的焦距为f2,第二透镜物侧面的曲率半径为R3,第二透镜像侧面的曲率半径为R4,第二透镜的折射率为n2,满足下列关系式:0.80≤f2/f≤1.50;1.67≤n2≤2.20;1.20≤f1/f≤2.00;4.50≤(R3+R4)/(R3-R4)≤15.00。本发明提供的投影镜头具有良好光学性能的同时,满足广角化、超薄化的设计要求。
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