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公开(公告)号：US20210356705A1
公开(公告)日：2021-11-18
申请号：US17388530
申请日：2021-07-29
发明人： Qing MAO
摘要： An imaging lens includes first and second lens groups at object and image sides, respectively, and an aperture between the first and second lens groups. The first lens group includes first and second lenses from the object side to the image side. The second lens group includes third, fourth, fifth, and sixth lenses from the object side to the image side. The fifth lens includes a concave object-side surface and a convex image-side surface, each of which has at least one inflection point. The sixth lens includes a convex object-side surface and a concave image-side surface, each of which has at least one inflection point. The imaging lens satisfies 0.56
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公开(公告)号：US20210173178A1
公开(公告)日：2021-06-10
申请号：US15780111
申请日：2017-10-23
发明人： Lin HUANG
摘要： The present disclosure provides an iris lens assembly. The iris lens assembly includes sequentially a first lens and a second lens from an object side to an image side along an optical axis. The first lens has a positive focal power, an object side surface of the first lens is a convex surface, and an image side surface of the first lens is a concave surface. The second lens has a negative focal power. A spacing distance T12 between the first lens and the second lens on the optical axis and a distance TTL from the object side surface of the first lens to an image plane of the iris lens assembly on the optical axis satisfy: T12/TTL>0.32.
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公开(公告)号：US20200271903A1
公开(公告)日：2020-08-27
申请号：US16796764
申请日：2020-02-20
发明人： Hiroki Ebe , Shinichiro Saito
摘要： A converter lens according to an exemplary embodiment of the present invention is a converter lens that has a negative refractive power and increases a focal length of an entire system. The converter lens includes a front group having a positive refractive power and a rear group having a negative refractive power, and the front group is a lens unit having a combined refractive power having a maximum positive refractive power in a case where the combined refractive power is obtained by combining a refractive power of each lens in order from the lens closest to an object toward an image side. At this time, a focal length of the front group, a focal length of the converter lens, and a lateral magnification of the converter lens when the converter lens is disposed on an image side of a master lens are determined as appropriate.
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公开(公告)号：US20200174233A1
公开(公告)日：2020-06-04
申请号：US16692953
申请日：2019-11-22
发明人： Shunji Iwamoto
摘要： An optical system includes, in order from an object side to an image side, a first lens unit having positive refractive power, and a second lens unit having negative refractive power, wherein the first lens unit moves and the second lens unit does not move during focusing, wherein the first lens unit includes a positive lens arranged closest on the object side of the first lens unit, wherein the second lens unit includes three or more lenses including at least two negative lenses, wherein the first lens unit consists of a first subunit having positive refractive power, a second subunit having negative refractive power, and a third subunit having positive refractive power arranged in order from the object side to the image side, and wherein predetermined conditional expressions are satisfied.
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公开(公告)号：US20200064592A1
公开(公告)日：2020-02-27
申请号：US16539475
申请日：2019-08-13
发明人： Yoshihisa Tashiro
摘要： An observation optical system for use in observing an image displayed on an image displaying surface, includes, in order from an observation surface side to the image displaying surface side: a first lens having a first transmission reflective surface and a first transmissive surface; and a second lens having a second transmission reflective surface and a second transmissive surface, in which the first lens and the second lens are arranged via an interval interposed therebetween; light from the image displaying surface transmits through the second lens, is reflected by the first transmission reflective surface, is reflected by the second transmission reflective surface, is transmitted through the first lens, and then travels toward the observation surface side; and a focal length of the first lens and a focal length of the observation optical system are appropriately set.
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公开(公告)号：US10571669B2
公开(公告)日：2020-02-25
申请号：US14979515
申请日：2015-12-28
申请人： Young Optics Inc.
发明人： Sheng-Da Jiang , Hsin-Te Chen , Sheng-Tang Lai , Kai-Yun Chen
摘要： An optical lens includes a first lens group and a second lens group. The first lens group is disposed between a magnified side and a minified side and has a negative refractive power. The second lens group is disposed between the first lens group and the minified side and has a positive refractive power. The optical lens is capable of forming an image at the magnified side. 0.52>F/H>0.46, where F is an effective focal length, and H is an image height.
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公开(公告)号：US20200049949A1
公开(公告)日：2020-02-13
申请号：US16056528
申请日：2018-08-07
发明人： FEI-HSIN TSAI , CHING-YUN HUANG
摘要： A compact optical lens system includes, in order from the object side to the image side: a flat panel assembly made of glass, a first lens element with a negative refractive power, at least one of an object-side surface and an image-side surface of the first lens element being aspheric, a stop; and a second lens element with a positive refractive power having an object-side surface being convex near an optical axis and an image-side surface being convex near the optical axis, at least one of the object-side surface and the image-side surface of the second lens element being aspheric. Such a system can not only effectively collect light at a large angle, receive a wider range of images and achieve identification effects within very short distances, but also can reduce the distance between an object and the compact optical lens system, reduce the volume effectively and maintain its miniaturization.
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公开(公告)号：US10466449B2
公开(公告)日：2019-11-05
申请号：US15375618
申请日：2016-12-12
申请人： Young Optics Inc.
发明人： Sheng-Da Jiang , Yu-Hung Chou
摘要： An optical lens includes a first lens group with a negative refractive power, an aperture stop, and a second lens group with a positive refractive power. The first lens group includes a first aspheric lens and a second aspheric lens. The optical lens satisfies the conditions: 3.5>RT1>2.5 and 3.5>RT2>2.6, where RT1 is a ratio of a maximum axial thickness to a minimum axial thickness within a clear aperture of the first aspheric lens, and RT2 is a ratio of a maximum axial thickness to a minimum axial thickness within a clear aperture of the second aspheric lens.
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公开(公告)号：US20190129135A1
公开(公告)日：2019-05-02
申请号：US16171222
申请日：2018-10-25
发明人： Shigenobu Sugita , Yuki Nagao , Suguru Inoue
摘要： A lens apparatus includes an optical system having a lens, a positive lens, and a negative lens. A material of the positive lens, and a mechanism connecting a holding member holding the positive lens and an exterior member protecting the holding member to each other.
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公开(公告)号：US10175453B2
公开(公告)日：2019-01-08
申请号：US15822133
申请日：2017-11-25
摘要： The invention provides an optical imaging lens assembly comprising two lens elements (a positive optical power lens element and a negative optical power lens element) separated by an air gap. The positive lens element of the system may comprise fluorite crystal (CaF2) or other material with similar optical properties. The negative lens element of the system may be made from an optical material, typically glass, having a refractive index ne that lies within the 1.56
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