Patents by Inventor Masafumi Sueyoshi
Masafumi Sueyoshi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20140184887Abstract: An inner focus lens system comprising lens units each composed of at least one lens element, wherein a most object side lens unit is provided and is fixed with respect to an image surface in focusing, and the conditions: BF/Y<1.7 and (L×FNo)/f<2.2 (BF: a distance from an image side surface apex of a most image side lens element to the image surface, Y=f×tan ?, L: an overall length of lens system, FNo: a F-number of lens system, f: a focal length of lens system, ?: a half view angle of lens system) are simultaneously satisfied, or only the condition: (L×FNo)/f<2.0 (L: the overall length of lens system, FNo: the F-number of lens system, f: the focal length of lens system) is satisfied.Type: ApplicationFiled: December 6, 2013Publication date: July 3, 2014Applicant: Panasonic CorporationInventors: Yusuke YONETANI, Yoshio MATSUMURA, Satoshi KUZUHARA, Tomoko IIYAMA, Masafumi SUEYOSHI
-
Publication number: 20130335617Abstract: A zoom lens system, in order from an object side to an image side, comprising: a first lens unit having positive optical power; a second lens unit having negative optical power; a third lens unit having positive optical power; a fourth lens unit having negative optical power, and a subsequent lens unit, wherein the first lens unit comprises a negative lens element having negative optical power, and a positive lens element having positive optical power, and wherein the conditions: 1.47<nd2<1.57 and 60<?d2<75 (nd2: a refractive index to a d-line of the positive lens element, ?d2: an Abbe number to a d-line of the positive lens element) are satisfied.Type: ApplicationFiled: June 13, 2013Publication date: December 19, 2013Inventors: Takuya IMAOKA, Tsuneo UCHIDA, Shunichiro YOSHINAGA, Masafumi SUEYOSHI
-
Patent number: 8553339Abstract: The present invention is directed to provide an enhanced variable power zoom lens that has focusing lens optics reduced in weight so as to relieve of a load on a focusing drive system, and that has its anti-vibration lens optics reduced in both diameter and weight so as to relieve of a load on an anti-vibration drive system and downsize the same. The enhanced variable power zoom lens is adapted to have the foremost or first lens group G1 of positive refractivity, the second lens group G2 of negative refractivity, the third lens group G3 of positive refractivity, the fourth lens group G4 of negative refractivity, and the fifth lens group G5 of positive or negative refractivity arranged in sequence from a position closer to the object where the fourth lens group G4 serves as a focusing lens, and the third lens group G3 and the fifth lens group G5 together move on and along the same cam structure during zooming.Type: GrantFiled: May 20, 2011Date of Patent: October 8, 2013Assignees: Tamron Co., Ltd., Sony CorporationInventors: Hisayuki Yamanaka, Makoto Kanai, Masafumi Sueyoshi, Masaharu Hosoi
-
Patent number: 8542449Abstract: An enhanced variable power zoom lens is lightweight in whole and in part, especially, having its focusing lens optics reduced in weight so as to relieve of a load on a focusing drive system, and having its anti-vibration lens optics reduced in both diameter and weight so as to relieve of a load on an anti-vibration drive system and downsize the same. The zoom lens has the foremost or first lens group of positive refractivity, the second lens group of negative refractivity, the third lens group of positive refractivity, the fourth lens group of negative refractivity, and the fifth lens group arranged in sequence from a position closer to the object. The fourth lens group moves toward the image plane for focusing on from the infinity to a proximity object while part of the third lens group moves orthogonal to the optical axis for shifting an image.Type: GrantFiled: May 20, 2011Date of Patent: September 24, 2013Assignees: Tamron Co., Ltd, Sony CorporationInventors: Hisayuki Yamanaka, Makoto Kanai, Masafumi Sueyoshi, Masaharu Hosoi
-
Patent number: 8520318Abstract: A zoom lens including first, second, and third lens groups having positive, negative, and positive refractive powers, respectively, which are arranged in that order from the object side to the image side such that, when zooming from wide-angle to telephoto, the first lens group moves to the object side, and spacings between the lens groups change. The third lens group has at least two lenses including a first lens, which is a positive lens arranged closer to the object side than the other lenses of the third lens group. Blur correction is performed by moving the first lens perpendicularly to the optical axis. The third lens group is configured such that the following conditional expression is satisfied: 0.3<(1??kFW)·?kRW<1.9, where ?kFW and ?kRW are the lateral magnifications at wide-angle of, respectively, the first lens and the remaining lenses of the third lens group.Type: GrantFiled: April 11, 2011Date of Patent: August 27, 2013Assignee: Sony CorporationInventors: Masaharu Hosoi, Hiroyuki Matsumoto, Masafumi Sueyoshi
-
Patent number: 8451549Abstract: The present invention is directed to provide an enhanced variable power zoom lens that is lightweight as a whole, and especially, has its focusing lens optics reduced in weight so as to relieve of a load on a focusing drive system, and that has its anti-vibration lens optics reduced in both diameter and weight so as to relieve of a load on an anti-vibration drive system and downsize the same.Type: GrantFiled: May 20, 2011Date of Patent: May 28, 2013Assignees: Tamron Co., Ltd., Sony CorporationInventors: Hisayuki Yamanaka, Makoto Kanai, Masafumi Sueyoshi, Masaharu Hosoi
-
Patent number: 8094385Abstract: An image pickup lens includes: a first lens group including a single negative lens and a single positive lens disposed in order from the object side to the image side and having a positive refracting power; and a second lens group having a positive refracting power. The first and second lens groups are disposed in order from the object side to the image side. The first lens group is fixed, when the image pickup object distance varies from the infinity to the proximity, with respect to an image surface while the second lens group is moved from the image side to the object side to carry out focusing.Type: GrantFiled: October 25, 2010Date of Patent: January 10, 2012Assignee: Sony CorporationInventor: Masafumi Sueyoshi
-
Publication number: 20110286105Abstract: The present invention is directed to provide an enhanced variable power zoom lens that is lightweight as a whole, and especially, has its focusing lens optics reduced in weight so as to relieve of a load on a focusing drive system, and that has its anti-vibration lens optics reduced in both diameter and weight so as to relieve of a load on an anti-vibration drive system and downsize the same.Type: ApplicationFiled: May 20, 2011Publication date: November 24, 2011Inventors: Hisayukui YAMANAKA, Makoto Kanai, Masafumi Sueyoshi, Masaharu Hosoi
-
Publication number: 20110286107Abstract: An enhanced variable power zoom lens is lightweight in whole and in part, especially, having its focusing lens optics reduced in weight so as to relieve of a load on a focusing drive system, and having its anti-vibration lens optics reduced in both diameter and weight so as to relieve of a load on an anti-vibration drive system and downsize the same. The zoom lens has the foremost or first lens group of positive refractivity, the second lens group of negative refractivity, the third lens group of positive refractivity, the fourth lens group of negative refractivity, and the fifth lens group arranged in sequence from a position closer to the object. The fourth lens group moves toward the image plane for focusing on from the infinity to a proximity object while part of the third lens group moves orthogonal to the optical axis for shifting an image.Type: ApplicationFiled: May 20, 2011Publication date: November 24, 2011Inventors: Hisayuki Yamanaka, Makoto Kanai, Masafumi Sueyoshi, Masaharu Hosoi
-
Publication number: 20110286106Abstract: The present invention is directed to provide an enhanced variable power zoom lens that has focusing lens optics reduced in weight so as to relieve of a load on a focusing drive system, and that has its anti-vibration lens optics reduced in both diameter and weight so as to relieve of a load on an anti-vibration drive system and downsize the same. The enhanced variable power zoom lens is adapted to have the foremost or first lens group G1 of positive refractivity, the second lens group G2 of negative refractivity, the third lens group G3 of positive refractivity, the fourth lens group G4 of negative refractivity, and the fifth lens group G5 of positive or negative refractivity arranged in sequence from a position closer to the object where the fourth lens group G4 serves as a focusing lens, and the third lens group G3 and the fifth lens group G5 together move on and along the same cam structure during zooming.Type: ApplicationFiled: May 20, 2011Publication date: November 24, 2011Inventors: Hisayuki Yamanaka, Makoto Kanai, Masafumi Sueyoshi, Masaharu Hosoi
-
Publication number: 20110273780Abstract: A zoom lens includes first, second, and third lens groups having positive, negative, and positive refractive powers, respectively, which are arranged in order from the object side to the image side. When zooming from wide-angle to telephoto, the first lens group moves to the object side, and spacings between the lens groups change. The third lens group has at least two lenses including a positive lens arranged closest to the object side. Blur correction on the image plane is performed by moving the positive lens of the third lens group perpendicularly to the optical axis. The zoom lens satisfies the following conditional expression (1): 0.3<(1??kFW)·?kRW<1.9??(1) where ?kFW and ?kRW are respectively the lateral magnifications at wide-angle of the positive lens arranged closest to the object side in the third lens group, and of a lens group including all lenses arranged closer to the image side than the positive lens.Type: ApplicationFiled: April 11, 2011Publication date: November 10, 2011Applicant: Sony CorporationInventors: Masaharu Hosoi, Hiroyuki Matsumoto, Masafumi Sueyoshi
-
Publication number: 20110115963Abstract: An image pickup lens includes: a first lens group including a single negative lens and a single positive lens disposed in order from the object side to the image side and having a positive refracting power; and a second lens group having a positive refracting power. The first and second lens groups are disposed in order from the object side to the image side. The first lens group is fixed, when the image pickup object distance varies from the infinity to the proximity, with respect to an image surface while the second lens group is moved from the image side to the object side to carry out focusing.Type: ApplicationFiled: October 25, 2010Publication date: May 19, 2011Applicant: Sony CorporationInventor: Masafumi Sueyoshi
-
Patent number: 7880797Abstract: A tilt lens system includes a focus lens unit movable during focusing; a diaphragm sharing a primary optical axis with the focus lens unit; and a tilt lens unit, arranged on an image side of the focus lens unit and the diaphragm, having a negative refractive power and an optical axis tiltable with respect to the primary optical axis. Conditional Expressions (1) and (2) are satisfied as follows, 1.3<?t<1.7??(1) 0<P<H1??(2) where ?t is a lateral magnification of the tilt lens unit in a not tilted state, P is a distance from a most object side surface of the tilt lens unit to a rotating center of the tilt lens unit in a tilted state, and H1 is a distance from the most object side surface of the tilt lens unit to a first principal point of the tilt lens unit.Type: GrantFiled: May 9, 2008Date of Patent: February 1, 2011Assignee: Sony CorporationInventors: Yusuke Nanjo, Masafumi Sueyoshi
-
Patent number: 7808726Abstract: An image capture lens includes: when changed from infinity to close focusing, a first lens group moving from an image to an object with positive refractive power; and a second lens group fixed relatively to the image with negative refractive power, wherein the first lens group includes a negative first lens having a strong concave surface facing the image, the second lens group includes one negative lens having a strong concave surface facing the image or a negative cemented lens including positive and negative lenses, and conditional expressions; 0.7<f1/fi<0.9, 1.0<bf/fi<1.4, 0.5<Rf2/Rr2<1 are satisfied where fi: overall focal length, f1: first-lens-group focal length, bf: overall back focus, Rf2: radius of curvature of the image-side surface of the lens nearest to the object, and Rr2: radius of curvature of the surface nearest to the image of the second lens group.Type: GrantFiled: March 3, 2009Date of Patent: October 5, 2010Assignee: Sony CorporationInventor: Masafumi Sueyoshi
-
Patent number: 7649693Abstract: A zoom lens including a broad picture angle of 60 to 100 degrees as a photographic picture angle of the wide-angle end state, and having a magnification ratio of about three to six times, small front gem diameter, excellent compactness and high image formation performance, which is used in a video camera or a digital still camera, and an image pick-up apparatus using such a zoom lens. A zoom lens (20), consisting of plural groups and serving to change group spacing or spacings to thereby perform a magnification changing or adjusting operation, comprises a first lens group GR1 having positive refractive power, a second lens group GR2 having negative refractive power and a third lens group GR3 having positive refractive power which are arranged in order from the object side, and a last group GRR arranged at the side closest to the image surface and having negative refractive power, wherein the first lens group GR1 is constituted by single positive lens G1, and satisfies the following conditional formulas. 0.Type: GrantFiled: February 15, 2006Date of Patent: January 19, 2010Assignee: Sony CorporationInventors: Daisuke Kuroda, Masafumi Sueyoshi
-
Publication number: 20090225445Abstract: An image capture lens includes: when changed from infinity to close focusing, a first lens group moving from an image to an object with positive refractive power; and a second lens group fixed relatively to the image with negative refractive power, wherein the first lens group includes a negative first lens having a strong concave surface facing the image, the second lens group includes one negative lens having a strong concave surface facing the image or a negative cemented lens including positive and negative lenses, and conditional expressions; 0.7<f1/fi<0.9, 1.0<bf/fi<1.4, 0.5<Rf2/Rr2<1 are satisfied where fi: overall focal length, f1: first-lens-group focal length, bf: overall back focus, Rf2: radius of curvature of the image-side surface of the lens nearest to the object, and Rr2: radius of curvature of the surface nearest to the image of the second lens group.Type: ApplicationFiled: March 3, 2009Publication date: September 10, 2009Applicant: Sony CorporationInventor: Masafumi Sueyoshi
-
Patent number: 7545579Abstract: There is provided a zoom lens system, compact and light in weight and having high image formation performance over the zoom entire range irrespective of object lens while covering the range from the broad angle side up to the telescopic end state side, which is used in video camera and/or digital still camera.Type: GrantFiled: February 15, 2006Date of Patent: June 9, 2009Assignee: Sony CorporationInventors: Masafumi Sueyoshi, Daisuke Kuroda
-
Patent number: 7535657Abstract: There is provided a zoom lens system including at least a first lens group GR1 having a positive refractive power, a second lens group GR2 having a negative refractive power, a third lens group GR3 having a positive refractive power, a fourth lens group GR4 having a negative refractive power, a fifth lens group GR5 having a positive refractive power, and a sixth lens group GR6 having a negative refractive power, arranged sequentially from the object side. Zoom ratio is varied by changing the distance between the adjacent lens groups.Type: GrantFiled: February 15, 2006Date of Patent: May 19, 2009Assignees: Sony Corporation, Tamron Co., Ltd.Inventors: Daisuke Kuroda, Masafumi Sueyoshi, Kazuya Watanabe
-
Publication number: 20080309815Abstract: A tilt lens system includes a focus lens unit movable during focusing; a diaphragm sharing a primary optical axis with the focus lens unit; and a tilt lens unit, arranged on an image side of the focus lens unit and the diaphragm, having a negative refractive power and an optical axis tiltable with respect to the primary optical axis. Conditional Expressions (1) and (2) are satisfied as follows, 1.3<?t<1.7??(1) 0<P<H1??(2) where ?t is a lateral magnification of the tilt lens unit in a not tilted state, P is a distance from a most object side surface of the tilt lens unit to a rotating center of the tilt lens unit in a tilted state, and H1 is a distance from the most object side surface of the tilt lens unit to a first principal point of the tilt lens unit.Type: ApplicationFiled: May 9, 2008Publication date: December 18, 2008Applicant: Sony CorporationInventors: Yusuke Nanjo, Masafumi Sueyoshi
-
Publication number: 20080309798Abstract: There is provided a zoom lens system, compact and light in weight and having high image formation performance over the zoom entire range irrespective of object lens while covering the range from the broad angle side up to the telescopic end state side, which is used in video camera and/or digital still camera.Type: ApplicationFiled: February 15, 2006Publication date: December 18, 2008Applicant: Sony CorporationInventors: Masafumi Sueyoshi, Daisuke Kuroda