Patents by Inventor Hiroki TAKETOMO

Hiroki TAKETOMO 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).

  • Anti-reflection coating, optical member having it, and optical equipment comprising such optical member
    Patent number: 9201172
    Abstract: A anti-reflection coating comprising first to ninth layers laminated in this order on a substrate for having reflectance of 0.2% or less to light in a visible wavelength range of 390-720 nm, the second, fourth, sixth and eighth layers being high-refractive-index layers formed by high-refractive-index materials having refractive indices of 2.21-2.70 to a helium d-line having a wavelength of 587.56 nm; the first, third, fifth and seventh layers being intermediate-refractive-index layers formed by an intermediate-refractive-index material having a refractive index of 1.40 or more and less than 1.55 to the d-line; and the ninth layer being a low-refractive-index layer formed by a low-refractive-index material having a refractive index of 1.35 or more and less than 1.40 to the d-line.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: December 1, 2015
    Assignee: RICOH IMAGING COMPANY, LTD.
    Inventors: Hideo Fujii, Hiroki Taketomo
  • ANTI-REFLECTION COATING, OPTICAL MEMBER HAVING IT, AND OPTICAL EQUIPMENT COMPRISING SUCH OPTICAL MEMBER
    Publication number: 20140078589
    Abstract: A anti-reflection coating comprising first to ninth layers laminated in this order on a substrate for having reflectance of 0.2% or less to light in a visible wavelength range of 390-720 nm, the second, fourth, sixth and eighth layers being high-refractive-index layers formed by high-refractive-index materials having refractive indices of 2.21-2.70 to a helium d-line having a wavelength of 587.56 nm; the first, third, fifth and seventh layers being intermediate-refractive-index layers formed by an intermediate-refractive-index material having a refractive index of 1.40 or more and less than 1.55 to the d-line; and the ninth layer being a low-refractive-index layer formed by a low-refractive-index material having a refractive index of 1.35 or more and less than 1.40 to the d-line.
    Type: Application
    Filed: September 6, 2013
    Publication date: March 20, 2014
    Applicant: RICOH IMAGING COMPANY, LTD.
    Inventors: Hideo FUJII, Hiroki TAKETOMO