Patents by Inventor Yuan-Fan Liang
Yuan-Fan Liang 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).
-
Patent number: 11971603Abstract: A scope includes an objective lens system having refractive power, a relay lens system having refractive power, and an eyepiece system having refractive power. The relay lens system includes a first, a second, and a third lens groups. The second lens group includes a II-2-1 lens and a II-2-2 lens, and both of which are cemented. The third lens group includes a II-3-1 lens having a convex surface facing an object side and a II-3-2 lens having a convex surface facing an image side, and both of which are cemented. The second lens group and the third lens group can move along an optical axis to change a magnification of the relay lens system and thereby change a magnification of the scope. The objective lens system, the relay lens system, and the eyepiece system are arranged in order from the object side to the image side along the optical axis.Type: GrantFiled: December 3, 2021Date of Patent: April 30, 2024Assignees: SINTAI OPTICAL (SHENZHEN) CO., LTD., ASIA OPTICAL CO., INC.Inventor: Yuan-Fan Liang
-
Publication number: 20230418026Abstract: A lens assembly includes a first lens, a second lens, a third lens, and a cover glass. The first lens is with positive refractive power and includes a convex surface facing an image side. The second lens is a meniscus lens with refractive power. The third lens is with positive refractive power and includes a convex surface facing the image side. The first lens, the second lens, the third lens, and the cover glass are arranged in order from the image side to an object side along a first optical axis.Type: ApplicationFiled: April 25, 2023Publication date: December 28, 2023Inventors: Yuan-Fan Liang, Jia-Sin Chen
-
Patent number: 11714261Abstract: A wide-angle lens assembly includes a first lens group with negative refractive power, a second lens group with negative refractive power, a third lens group with positive refractive power, a fourth lens group with positive refractive power and a fifth lens group with positive refractive power. The first lens group includes a first lens, the second lens group includes a second lens, and the third lens group includes a third lens. The wide-angle lens assembly satisfies: 0.5<|fLG4/fLG5|<1.8, where fLG4 is an effective focal length of the fourth lens group, and fLG5 is an effective focal length of the fifth lens group.Type: GrantFiled: April 10, 2020Date of Patent: August 1, 2023Assignees: SINTAI OPTICAL (SHENZHEN) CO., LTD., ASIA OPTICAL CO., INC.Inventor: Yuan-Fan Liang
-
Publication number: 20220206250Abstract: A scope includes an objective lens system having refractive power, a relay lens system having refractive power, and an eyepiece system having refractive power. The relay lens system includes a first, a second, and a third lens groups. The second lens group includes a II-2-1 lens and a II-2-2 lens, and both of which are cemented. The third lens group includes a II-3-1 lens having a convex surface facing an object side and a II-3-2 lens having a convex surface facing an image side, and both of which are cemented. The second lens group and the third lens group can move along an optical axis to change a magnification of the relay lens system and thereby change a magnification of the scope. The objective lens system, the relay lens system, and the eyepiece system are arranged in order from the object side to the image side along the optical axis.Type: ApplicationFiled: December 3, 2021Publication date: June 30, 2022Inventor: Yuan-Fan LIANG
-
Publication number: 20200326515Abstract: A wide-angle lens assembly includes a first lens group with negative refractive power, a second lens group with negative refractive power, a third lens group with positive refractive power, a fourth lens group with positive refractive power and a fifth lens group with positive refractive power. The first lens group includes a first lens, the second lens group includes a second lens, and the third lens group includes a third lens. The wide-angle lens assembly satisfies: 0.5<|fLG4/fLG5|<1.8, where fLG4 is an effective focal length of the fourth lens group, and fLG is an effective focal length of the fifth lens group.Type: ApplicationFiled: April 10, 2020Publication date: October 15, 2020Inventor: Yuan-Fan Liang
-
Patent number: 10698177Abstract: A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged along an optical axis in order from an object side to an image side. The first lens is a meniscus lens with positive refractive power, and an object-side surface of the first lens is convex. The second lens is a lens with positive refractive power, and an object-side surface of the second lens is convex. The third lens is a lens with negative refractive power, and an object-side surface and an image-side surface of the third lens are concave. The fourth lens is a meniscus lens with negative refractive power. The fifth lens is a lens with positive refractive power, and an object-side surface of the fifth lens is convex.Type: GrantFiled: June 12, 2018Date of Patent: June 30, 2020Assignees: SINTAI OPTICAL (SHENZHEN) CO., LTD., ASIA OPTICAL CO., INC.Inventor: Yuan Fan Liang
-
Patent number: 10656384Abstract: A wide-angle lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens is with refractive power. The second lens includes a convex surface facing the object side. The third lens is with positive refractive power and includes a convex surface facing the image side. The fourth lens is with refractive power. The fifth lens includes a concave surface facing the object side. The sixth lens includes a concave surface facing the image side. The wide-angle lens assembly satisfies: 0.62<(R41?R42)/(R41+R42)<5.60, wherein R41 is a radius of curvature of an object side surface of the fourth lens and R42 is a radius of curvature of an image side surface of the fourth lens.Type: GrantFiled: January 12, 2018Date of Patent: May 19, 2020Assignees: SINTAI OPTICAL (SHENZHEN) CO., LTD., ASIA OPTICAL CO., INC.Inventors: Chien-Hung Chen, Hsi-Ling Chang, Yuan-Fan Liang
-
Publication number: 20190101726Abstract: A lens assembly includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged along an optical axis in order from an object side to an image side. The first lens is a meniscus lens with positive refractive power, and an object-side surface of the first lens is convex. The second lens is a lens with positive refractive power, and an object-side surface of the second lens is convex. The third lens is a lens with negative refractive power, and an object-side surface and an image-side surface of the third lens are concave. The fourth lens is a meniscus lens with negative refractive power. The fifth lens is a lens with positive refractive power, and an object-side surface of the fifth lens is convex.Type: ApplicationFiled: June 12, 2018Publication date: April 4, 2019Inventor: Yuan Fan Liang
-
Publication number: 20180335611Abstract: A wide-angle lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens is with refractive power. The second lens includes a convex surface facing the object side. The third lens is with positive refractive power and includes a convex surface facing the image side. The fourth lens is with refractive power. The fifth lens includes a concave surface facing the object side. The sixth lens includes a concave surface facing the image side. The wide-angle lens assembly satisfies: 0.62<(R41?R42)/(R41+R42)<5.60, wherein R41 is a radius of curvature of an object side surface of the fourth lens and R42 is a radius of curvature of an image side surface of the fourth lens.Type: ApplicationFiled: January 12, 2018Publication date: November 22, 2018Inventors: Chien-Hung Chen, Hsi-Ling Chang, Yuan-Fan Liang
-
Patent number: 9696520Abstract: A wide-angle lens, from an object side to an image side along an optical axis, includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens. The first, second and third lens are with negative refractive power. The fourth, fifth, sixth and seventh lens are with refractive power. The eighth lens is a biconvex lens with positive refractive power. The ninth lens is a biconvex lens with positive refractive power. The first lens, the second lens and the third lens satisfy: ?26<f1/f<f2/f<f3/f<?3 and ?1.64<f123/f<?1.6 wherein f1 and f2 are effective focal lengths of the first and second lenses, f3 and f are an effective focal lengths of the third lens and the wide-angle lens, and f123 is an effective focal length of the combination of the first lens, second lens and third lens.Type: GrantFiled: October 6, 2015Date of Patent: July 4, 2017Assignees: SINTAI OPTICAL (SHENZHEN) CO., LTD., AO ETHER CORPORATIONInventors: Yuan-Fan Liang, Tsan-Haw Lee
-
Patent number: 9523840Abstract: A lens assembly includes a first lens, a second lens, a stop, a third lens and a fourth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens and the fourth lens are with negative refractive power. The second lens and the third lens are biconvex lenses with positive refractive power. The first, third, fourth lens include an object side surface and an image side surface respectively, wherein at least one of the object side surface and the image side surface is an aspheric surface. The lens assembly satisfies: 0<|f1/f2|<|f4/f3|<2, f/D12>1 wherein f1, f2, f3, f4, and f is an effective focal length of the first, second, third, fourth lens and the lens assembly, and D12 is an interval from the first lens to the second lens along the optical axis.Type: GrantFiled: October 23, 2015Date of Patent: December 20, 2016Assignees: SINTAI OPTICAL (SHENZHEN) CO., LTD., AO ETHER CORPORATIONInventor: Yuan-Fan Liang
-
Publication number: 20160116710Abstract: A lens assembly includes a first lens, a second lens, a stop, a third lens and a fourth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens and the fourth lens are with negative refractive power. The second lens and the third lens are biconvex lenses with positive refractive power. The first, third, fourth lens include an object side surface and an image side surface respectively, wherein at least one of the object side surface and the image side surface is an aspheric surface. The lens assembly satisfies: 0<|f1/f2|<|f4/f3|<2, f/D12>1 wherein f1, f2, f3, f4, and f is an effective focal length of the first, second, third, fourth lens and the lens assembly, and D12 is an interval from the first lens to the second lens along the optical axis.Type: ApplicationFiled: October 23, 2015Publication date: April 28, 2016Inventor: Yuan-Fan Liang
-
Publication number: 20160103301Abstract: A wide-angle lens, from an object side to an image side along an optical axis, includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens. The first, second and third lens are with negative refractive power. The fourth, fifth, sixth and seventh lens are with refractive power. The eighth lens is a biconvex lens with positive refractive power. The ninth lens is a biconvex lens with positive refractive power. The first lens, the second lens and the third lens satisfy: ?26<f1/f<f2/f<f3/f<?3 and ?1.64<f123/f<?1.6 wherein f1 and f2 are effective focal lengths of the first and second lenses, f3 and f are an effective focal lengths of the third lens and the wide-angle lens, and f123 is an effective focal length of the combination of the first lens, second lens and third lens.Type: ApplicationFiled: October 6, 2015Publication date: April 14, 2016Inventors: Yuan-Fan Liang, Tsan-Haw Lee
-
Patent number: 9122046Abstract: An imaging lens including the first˜fifth lens arranged in sequence from an object side to an image side is provided. The first lens has at least one aspheric surface. The second lens with negative optical power has at least one aspheric surface and a convex surface facing towards the object side. The third lens with positive optical power has at least one aspheric surface and a concave surface facing towards the object side. The fourth lens with negative optical power has at least one aspheric surface and a concave surface facing towards the image side. The fifth lens with positive optical power has at least one aspheric surface and a convex surface facing towards the object side. By the above arrangement, the imaging lens has a shorter optical total length and a larger aperture for enhancing the image quality.Type: GrantFiled: December 3, 2012Date of Patent: September 1, 2015Assignees: SINTAI OPTICAL (SHENZHEN) CO., LTD., Asia Optical International Ltd.Inventor: Yuan-Fan Liang
-
Patent number: 9019627Abstract: A lens assembly includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens is with positive refractive power and includes a convex surface facing the object side. The second lens is a meniscus lens with negative refractive power and includes a convex surface facing the object side. The third lens is with positive refractive power and includes a convex surface facing the image side. The fourth lens is with positive refractive power and includes a convex surface facing the image side. The fifth lens is a biconcave lens with negative refractive power.Type: GrantFiled: September 27, 2013Date of Patent: April 28, 2015Assignees: Sintai Optical (Shenzhen) Co., Ltd., Asia Optical International Ltd.Inventor: Yuan-Fan Liang
-
Publication number: 20140092488Abstract: A lens assembly includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens is with positive refractive power and includes a convex surface facing the object side. The second lens is a meniscus lens with negative refractive power and includes a convex surface facing the object side. The third lens is with positive refractive power and includes a convex surface facing the image side. The fourth lens is with positive refractive power and includes a convex surface facing the image side. The fifth lens is a biconcave lens with negative refractive power.Type: ApplicationFiled: September 27, 2013Publication date: April 3, 2014Applicants: Asia Optical International Ltd., Sintai Optical (Shenzhen) Co., Ltd.Inventor: Yuan-Fan Liang
-
Publication number: 20130286487Abstract: An imaging lens including the first˜fifth lens arranged in sequence from an object side to an image side is provided. The first lens has at least one aspheric surface. The second lens with negative optical power has at least one aspheric surface and a convex surface facing towards the object side. The third lens with positive optical power has at least one aspheric surface and a concave surface facing towards the object side. The fourth lens with negative optical power has at least one aspheric surface and a concave surface facing towards the image side. The fifth lens with positive optical power has at least one aspheric surface and a convex surface facing towards the object side. By the above arrangement, the imaging lens has a shorter optical total length and a larger aperture for enhancing the image quality.Type: ApplicationFiled: December 3, 2012Publication date: October 31, 2013Inventor: Yuan-Fan Liang
-
Patent number: 8531785Abstract: The present invention provides a projection prime lens including first lens group, a second lens group, and a third lens group arranged in sequence along an optical axis from a screen side to a light modulator side. The first lens group has negative refractive power and includes a first lens with negative refractive power and a second lens with negative refractive power. The second lens group has positive refractive power and includes a third lens with positive refractive power and a fourth lens with positive refractive power The third lens group has positive refractive power and includes a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with positive refractive power. Therefore, the projection prime lens of the present invention has a small size and a good image quality.Type: GrantFiled: May 13, 2011Date of Patent: September 10, 2013Assignee: Asia Optical Co., Inc.Inventors: Yuan-Fan Liang, Tsan-Haw Lee
-
Publication number: 20120170132Abstract: The present invention provides a projection prime lens including first lens group, a second lens group, and a third lens group arranged in sequence along an optical axis from a screen side to a light modulator side. The first lens group has negative refractive power and includes a first lens with negative refractive power and a second lens with negative refractive power. The second lens group has positive refractive power and includes a third lens with positive refractive power and a fourth lens with positive refractive power The third lens group has positive refractive power and includes a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with positive refractive power. Therefore, the projection prime lens of the present invention has a small size and a good image quality.Type: ApplicationFiled: May 13, 2011Publication date: July 5, 2012Applicant: ASIA OPTICAL CO., INC.Inventors: Yuan-Fan Liang, Tsan-Haw Lee