公开(公告)号：US20250045941A1

公开(公告)日：2025-02-06

申请号：US18378795

申请日：2023-10-11

Applicant: NATIONAL CENTRAL UNIVERSITY

Inventor： Wen-Hsin SUN ,  Jun-Yi YU ,  Siang-Siuan TSAI ,  Guan-Wei HUANG ,  Ching-Cherng SUN

IPC: G06T7/50 ,  G06T7/20 ,  H04N23/51

Abstract: A depth camera capable of measuring the oblique velocity of an object is provided, wherein a depth camera capable of measuring the lateral velocity of an object includes a depth camera body, a first configuration file, and a lateral velocity calculation system. The lateral velocity calculation system includes: first image-processing software for recording a first depth distance at which images are taken of an object and for calculating the number of pixels corresponding to a lateral movement of the object and the duration of the lateral movement; and lateral velocity calculation software for calculating the lateral velocity of the object. The depth camera capable of measuring the oblique velocity of an object allows the lateral/longitudinal/oblique velocity of an object to be measured in real time using image-related techniques.

公开(公告)号：US20250138283A1

公开(公告)日：2025-05-01

申请号：US18402360

申请日：2024-01-02

Applicant: NATIONAL CENTRAL UNIVERSITY

Inventor： Ying-Shun SHIU ,  Guan-Wei HUANG ,  Jun-Yi YU ,  Wen-Hsin SUN ,  Wei-Chia SU ,  Wen-Kai LIN ,  Shao-Kui ZHOU ,  Yuan-Yan LIANG ,  Ching-Cherng SUN

IPC: G02B13/00 ,  G02B9/34

Abstract: A coupled lens structure for a mixed/augmented reality system includes: a lens tube; a first lens with a first aspherical light input surface coupled to a lens-tube light input surface; a second lens with a second spherical light input surface optically coupled to a first spherical light output surface of the first lens; a third lens with a third spherical light input surface optically coupled to a second aspherical light output surface of the second lens; and a fourth lens with a fourth spherical light input surface optically coupled to a third spherical light output surface of the third lens and a fourth spherical light output surface coupled to a lens-tube light output surface. The coupled lens structure has volume of 2.1-3 cc, a lens-tube outer diameter of 12-13.5 mm, and a full angle of view not greater than 30 degrees, featuring an effective reduction in volume and weight.

公开(公告)号：US20240319483A1

公开(公告)日：2024-09-26

申请号：US18365203

申请日：2023-08-03

Applicant: National Central University

Inventor： Wen-Hsin SUN ,  Wei-Chia SU ,  Jun-Yi YU ,  Ching-Cherng SUN

IPC: G02B13/16 ,  G02B5/32 ,  G02B27/01

CPC classification number: G02B13/16 ,  G02B5/32 ,  G02B27/0172 ,  G02B2027/0107 ,  G02B2027/0174

Abstract: A volume holographic optical element projection system includes a projection lens, a polarizing beam splitter, a liquid crystal on silicon panel, and a volume holographic optical element. The projection lens includes a light incident side, a light emitting side, and nine lenses. A f-number of the projection lens is in a range from 1 to 3. The f-number is a value derived from dividing the focal length by the entrance pupil diameter. The liquid crystal on silicon panel includes a protection glass. The polarizing beam splitter is located between the light incident side of the projection lens and the protection glass of the liquid crystal on silicon panel. The light emitting side of the projection lens faces the volume holographic optical element.

公开(公告)号：US20240036289A1

公开(公告)日：2024-02-01

申请号：US18045834

申请日：2022-10-12

Applicant: National Central University

Inventor： Wen-Hsin SUN ,  Siang-Siuan TSAI ,  Jun-Yi YU ,  Ching-Cherng SUN

IPC: G02B9/64

CPC classification number: G02B9/64

Abstract: An optical lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens. The first lens has a convex surface toward an object side of the optical lens assembly and a concave surface toward an imaging side of the optical lens assembly. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are sequentially arranged along an optical axis from the object side to the imaging side.