Patents by Inventor Hongzhong Cao

Hongzhong Cao 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: 20170157850
    Abstract: This invention discloses a multi-wavelength selective laser rapid prototyping system comprising laser light sources, laser transmission and control components, laser focusing and scanning components, manufacturing chamber, powder feeding components, powder laying components, gas circulation control components, real-time monitoring components, lifting components, powder recovery components, and computer. Said laser light source comprises a first laser source for providing a first wavelength laser beam and a second laser source for providing a second wavelength laser beam, or a laser source for providing both the first and second wavelength laser beams. Adoption of a short wave laser beam in the system is beneficial to improve the manufacturing resolution and precision. At the same time a superposed long wavelength laser beam is adopted to ensure the preheating and subsequent heat treatment. Thermal stress of the manufactured structure is reduced. Manufacturing efficiency is further improved.
    Type: Application
    Filed: February 20, 2017
    Publication date: June 8, 2017
    Inventors: Xuanming DUAN, Jie LIU, Hongzhong CAO, Shuqian FAN, Meiling ZHENG, Jiquan LIU
  • Patent number: 9636777
    Abstract: A laser micro/nano processing system (100, 200, 300, 400) comprises: a laser light source used to provide a first laser beam having a first wavelength and a second laser beam having a second wavelength different from the first wavelength, with the pulse width of the first laser beam being in the range from a nanosecond to a femtosecond; an optical focusing assembly used to focus the first laser beam and the second laser beam to the same focal point; and a micro mobile platform (21) controlled by a computer. Also disclosed are a method for micro/nano-processing photosensitive materials with a laser and a method for fabricating a device with a micro/nano structure using laser two-photon direct writing technology. In the system and methods, spatial and temporal overlapping of two laser beams is utilized, so as to obtain a micro/nano structure with a processing resolution higher than that of a single laser beam, using an average power lower than that of a single laser beam.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: May 2, 2017
    Assignee: Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences
    Inventors: Xuanming Duan, Shu Chen, Hongzhong Cao, Xianzi Dong, Zhensheng Zhao
  • Publication number: 20160096233
    Abstract: A laser micro/nano processing system (100, 200, 300, 400) comprises: a laser light source used to provide a first laser beam having a first wavelength and a second laser beam having a second wavelength different from the first wavelength, with the pulse width of the first laser beam being in the range from a nanosecond to a femtosecond; an optical focusing assembly used to focus the first laser beam and the second laser beam to the same focal point; and a micro mobile platform (21) controlled by a computer. Also disclosed are a method for micro/nano-processing photosensitive materials with a laser and a method for fabricating a device with a micro/nano structure using laser two-photon direct writing technology. In the system and methods, spatial and temporal overlapping of two laser beams is utilized, so as to obtain a micro/nano structure with a processing resolution higher than that of a single laser beam, using an average power lower than that of a single laser beam.
    Type: Application
    Filed: November 3, 2015
    Publication date: April 7, 2016
    Applicant: TECHNICAL INSTITUTE OF PHYSICS AND CHEMISTRY OF THE CHINESE ACADEMY OF SCIENCES
    Inventors: Xuanming Duan, Shu Chen, Hongzhong Cao, Xianzi Dong, Zhensheng Zhao
  • Patent number: 9187318
    Abstract: A laser micro/nano processing system (100, 200, 300, 400) comprises: a laser light source used to provide a first laser beam having a first wavelength and a second laser beam having a second wavelength different from the first wavelength, with the pulse width of the first laser beam being in the range from a nanosecond to a femtosecond; an optical focusing assembly used to focus the first laser beam and the second laser beam to the same focal point; and a micro mobile platform (21) controlled by a computer. Also disclosed are a method for micro/nano-processing photosensitive materials with a laser and a method for fabricating a device with a micro/nano structure using laser two-photon direct writing technology. In the system and methods, spatial and temporal overlapping of two laser beams is utilized, so as to obtain a micro/nano structure with a processing resolution higher than that of a single laser beam, using an average power lower than that of a single laser beam.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: November 17, 2015
    Assignee: Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences
    Inventors: Xuanming Duan, Shu Chen, Hongzhong Cao, Xianzi Dong, Zhensheng Zhao
  • Publication number: 20130183833
    Abstract: A laser micro/nano processing system (100, 200, 300, 400) comprises: a laser light source used to provide a first laser beam having a first wavelength and a second laser beam having a second wavelength different from the first wavelength, with the pulse width of the first laser beam being in the range from a nanosecond to a femtosecond; an optical focusing assembly used to focus the first laser beam and the second laser beam to the same focal point; and a micro mobile platform (21) controlled by a computer. Also disclosed are a method for micro/nano-processing photosensitive materials with a laser and a method for fabricating a device with a micro/nano structure using laser two-photon direct writing technology. In the system and methods, spatial and temporal overlapping of two laser beams is utilized, so as to obtain a micro/nano structure with a processing resolution higher than that of a single laser beam, using an average power lower than that of a single laser beam.
    Type: Application
    Filed: September 15, 2011
    Publication date: July 18, 2013
    Applicant: TECHNICAL INSTITUTE OF PHYSICS AND CHEMISTRY OF THE CHINESE ACADEMY OF SCIENCES
    Inventors: Xuanming Duan, Shu Chen, Hongzhong Cao, Xianzi Dong, Zhensheng Zhao