Patents by Inventor Akira Takasima

Akira Takasima 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).

  • Photometry device
    Patent number: 8562132
    Abstract: In a photometry device, photopic vision luminance Lp is measured by a first luminance measuring unit including a first light filter 4 and a first photoelectric converter 5, and scotopic vision luminance Ls is measured by a second luminance measuring unit including a second light filter 6 and a second photoelectric converter 7. A calculation part 8 calculates mesopic vision luminance Lmes based on a measurement value (photopic vision luminance Lp) of the first luminance measuring unit and a ratio of a measurement value (scotopic vision luminance Ls) of the second luminance measuring unit to the measurement value (photopic vision luminance Lp) of the first luminance measuring unit. Consequently, the photometry device can improve measurement accuracy of the brightness (mesopic vision luminance) in mesopic vision.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: October 22, 2013
    Assignee: Panasonic Corporation
    Inventors: Takashi Saito, Hiroki Noguchi, Naohiro Toda, Ayako Tsukitani, Kouji Nishioka, Akira Takasima, Kaoru Ibara, Kensuke Yamazoe, Hiroe Kubo, Yoshinori Karasawa
  • PHOTOMETRY DEVICE
    Publication number: 20120075583
    Abstract: In a photometry device, photopic vision luminance Lp is measured by a first luminance measuring unit including a first light filter 4 and a first photoelectric converter 5, and scotopic vision luminance Ls is measured by a second luminance measuring unit including a second light filter 6 and a second photoelectric converter 7. A calculation part 8 calculates mesopic vision luminance Lmes based on a measurement value (photopic vision luminance Lp) of the first luminance measuring unit and a ratio of a measurement value (scotopic vision luminance Ls) of the second luminance measuring unit to the measurement value (photopic vision luminance Lp) of the first luminance measuring unit. Consequently, the photometry device can improve measurement accuracy of the brightness (mesopic vision luminance) in mesopic vision.
    Type: Application
    Filed: July 12, 2011
    Publication date: March 29, 2012
    Applicant: Panasonic Electric Works Co., Ltd.
    Inventors: Takashi SAITO, Hiroki Noguchi, Naohiro Toda, Ayako Tsukitani, Kouji Nishioka, Akira Takasima, Kaoru Ibara, Kensuke Yamazoe, Hiroe Kubo, Yoshinori Karasawa