US Patent Issued to MITUTOYO on July 7 for "Variable focal length lens device and variable focal length lens control method" (Japanese Inventors)

ALEXANDRIA, Va., July 7 -- United States Patent no. 12,675,023, issued on July 7, was assigned to MITUTOYO Corp. (Kanagawa, Japan).

"Variable focal length lens device and variable focal length lens control method" was invented by Satoru Yoshida (Kanagawa, Japan), Yuki Kurahashi (Tokyo) and Koji Kubo (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A variable focal length lens device includes: a liquid resonant liquid lens unit having a refractive index changeable in response to an inputted drive signal; a scanning range setter setting a predetermined standard frequency band as a scanning range of a frequency of the drive signal; a resonance frequency detector scanning the frequency of the drive signal o...