Patents by Inventor Mitsuru Kanokogi
Mitsuru Kanokogi 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).
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Patent number: 11733357Abstract: A 3-dimensional measuring device includes: a light source unit; a projection optical system; a scanning mirror that is provided to be rotatable about a rotating shaft in a state of being inclined with respect to a shaft center of the rotating shaft to radiate a range-finding light within a plane crossing the rotating shaft in a rotary manner; a light-receiving optical system that receives a reflection range-finding light; a reference light optical system that is provided in a range outside a measuring range within a radiation range to receive and reflect the range-finding light as an internal reference light, the reference light optical system being capable of changing a light quantity of the internal reference light; and a light receiving element that receives the reflection range-finding light and the internal reference light.Type: GrantFiled: October 28, 2022Date of Patent: August 22, 2023Assignee: TOPCON CORPORATIONInventors: Yasushi Tanaka, Takaaki Saito, Ken'ichiro Yoshino, Mitsuru Kanokogi
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Publication number: 20230077077Abstract: A 3-dimensional measuring device includes: a light source unit; a projection optical system; a scanning mirror that is provided to be rotatable about a rotating shaft in a state of being inclined with respect to a shaft center of the rotating shaft to radiate a range-finding light within a plane crossing the rotating shaft in a rotary manner; a light-receiving optical system that receives a reflection range-finding light; a reference light optical system that is provided in a range outside a measuring range within a radiation range to receive and reflect the range-finding light as an internal reference light, the reference light optical system being capable of changing a light quantity of the internal reference light; and a light receiving element that receives the reflection range-finding light and the internal reference light.Type: ApplicationFiled: October 28, 2022Publication date: March 9, 2023Applicant: TOPCON CORPORATIONInventors: Yasushi TANAKA, Takaaki SAITO, Ken'ichiro YOSHINO, Mitsuru KANOKOGI
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Patent number: 11520015Abstract: A 3-dimensional measuring device includes: a light source unit; a projection optical system; a scanning mirror that is provided to be rotatable about a rotating shaft in a state of being inclined with respect to a shaft center of the rotating shaft to radiate a range-finding light within a plane crossing the rotating shaft in a rotary manner; a light-receiving optical system that receives a reflection range-finding light; a reference light optical system that is provided in a range outside a measuring range within a radiation range to receive and reflect the range-finding light as an internal reference light, the reference light optical system being capable of changing a light quantity of the internal reference light; and a light receiving element that receives the reflection range-finding light and the internal reference light.Type: GrantFiled: August 21, 2018Date of Patent: December 6, 2022Assignee: TOPCON CORPORATIONInventors: Yasushi Tanaka, Takaaki Saito, Ken'ichiro Yoshino, Mitsuru Kanokogi
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Publication number: 20190064326Abstract: A 3-dimensional measuring device includes: a light source unit; a projection optical system; a scanning mirror that is provided to be rotatable about a rotating shaft in a state of being inclined with respect to a shaft center of the rotating shaft to radiate a range-finding light within a plane crossing the rotating shaft in a rotary manner; a light-receiving optical system that receives a reflection range-finding light; a reference light optical system that is provided in a range outside a measuring range within a radiation range to receive and reflect the range-finding light as an internal reference light, the reference light optical system being capable of changing a light quantity of the internal reference light; and a light receiving element that receives the reflection range-finding light and the internal reference light.Type: ApplicationFiled: August 21, 2018Publication date: February 28, 2019Applicant: TOPCON CORPORATIONInventors: Yasushi TANAKA, Takaaki SAITO, Ken'ichiro YOSHINO, Mitsuru KANOKOGI
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Patent number: 8908158Abstract: An electronic distance measuring instrument comprises a pulsed light emitting light source, means for creating a distance measuring pulsed light and an internal reference pulsed light, a photodetector for detecting the pulsed lights, and a measuring unit for calculating a distance to an object to be measured based on a photodetection signal. The measuring unit performs coarse distance measurement based on difference of photodetection time between the internal reference pulsed light and the distance measuring pulsed light, carries out Fourier function transform on photodetection waveform of the pulsed lights respectively, separates the waveforms to a plurality of frequency components, obtains phase difference for each of the frequency components acquired, performs fine distance measurement based on time difference acquired from phase difference, and measures a distance to the object by adding a result of coarse distance measurement to a result of fine distance measurement.Type: GrantFiled: June 20, 2012Date of Patent: December 9, 2014Assignee: Kabushiki Kaisha TOPCONInventors: Ken-ichiro Yoshino, Kaoru Kumagai, Mitsuru Kanokogi, Masae Matsumoto
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Patent number: 8781780Abstract: The present invention provides an electro-optical distance measurement, wherein a light from a light source (6) is projected toward an object to be measured (2), a reflection light reflected by the object to be measured is received at a photodetection unit (8), the light from the light source is received by the photodetection unit as an inner light via an inner optical path (11), and a distance to the object to be measured is measured according to the result of photodetection of the reflection light and the inner light of the photodetection unit, and wherein a correction information is acquired based on the inner light, the acquired correction information is stored, a correction value is obtained from the correction information based on the reflection light and the inner light, and a distance is calculated from the correction value and the result of photodetection of the reflection light and the inner light.Type: GrantFiled: December 25, 2009Date of Patent: July 15, 2014Assignee: Kabushiki Kaisha TOPCONInventors: Mitsuru Kanokogi, Masahiro Ohishi
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Publication number: 20130003040Abstract: An electronic distance measuring instrument comprises a pulsed light emitting light source, means for creating a distance measuring pulsed light and an internal reference pulsed light, a photodetector for detecting the pulsed lights, and a measuring unit for calculating a distance to an object to be measured based on a photodetection signal. The measuring unit performs coarse distance measurement based on difference of photodetection time between the internal reference pulsed light and the distance measuring pulsed light, carries out Fourier function transform on photodetection waveform of the pulsed lights respectively, separates the waveforms to a plurality of frequency components, obtains phase difference for each of the frequency components acquired, performs fine distance measurement based on time difference acquired from phase difference, and measures a distance to the object by adding a result of coarse distance measurement to a result of fine distance measurement.Type: ApplicationFiled: June 20, 2012Publication date: January 3, 2013Applicant: KABUSHIKI KAISHA TOPCONInventors: Ken-ichiro Yoshino, Kaoru Kumagai, Mitsuru Kanokogi, Masae Matsumoto
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Publication number: 20110270563Abstract: The present invention provides an electro-optical distance measurement, wherein a light from a light source (6) is projected toward an object to be measured (2), a reflection light reflected by the object to be measured is received at a photodetection unit (8), the light from the light source is received by the photodetection unit as an inner light via an inner optical path (11), and a distance to the object to be measured is measured according to the result of photodetection of the reflection light and the inner light of the photodetection unit, and wherein a correction information is acquired based on the inner light, the acquired correction information is stored, a correction value is obtained from the correction information based on the reflection light and the inner light, and a distance is calculated from the correction value and the result of photodetection of the reflection light and the inner light.Type: ApplicationFiled: December 25, 2009Publication date: November 3, 2011Applicant: KABUSHIKI KAISHA TOPCONInventors: Mitsuru Kanokogi, Masahiro Ohishi
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Patent number: 6803593Abstract: A distance measuring system, which comprises a control arithmetic unit 1, a light emitting unit 2 for emitting a measuring light beam and a photodetection unit 3 for receiving a reflection light beam from an object to be measured, the system being used for measuring a distance by receiving the reflection light beam from the object to be measured, wherein the control arithmetic unit compares a signal based on the photodetection amount of the reflection light from the object to be measured as well as a result of the distance measurement with reference data prestored in the control arithmetic unit relating to the reflection of the object to be measured, and judges whether the object to be measured is a prism or a natural object based on a result of the comparison.Type: GrantFiled: April 26, 2000Date of Patent: October 12, 2004Assignee: Kabushiki Kaisha TOPCONInventors: Masahiro Ohishi, Mitsuru Kanokogi
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Publication number: 20020185618Abstract: A distance measuring system, which comprises a control arithmetic unit 1, a light emitting unit 2 for emitting a measuring light beam and a photodetection unit 3 for receiving a reflection light beam from an object to be measured, and said system being used for measuring a distance by receiving said reflection light beam from said object to be measured, wherein said control arithmetic unit compares a signal based on photodetection amount of the light from said object to be measured as well as a result of distance measurement with a reference data prestored in said control arithmetic unit relating to reflection of said object to be measured, and judges said object to be measured based on a result of the comparison.Type: ApplicationFiled: April 26, 2000Publication date: December 12, 2002Inventors: Masahiro Ohishi, Mitsuru Kanokogi
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Patent number: 6483121Abstract: The present invention relates to a distance measuring apparatus utilizing light waves, in particular the distance measuring apparatus is able to measure a distance effectively even in an environment containing such a noise light as to disturb the measurement by light waves. In the above-mentioned apparatus, the projection system irradiates the target of measurement with light beams, the light reception means in the light reception system receives the reflected light beams, and the processing means calculates the distance from the measuring position to the target of measurement based on the reflected light beams. The threshold level of the light reception means for judging the incidence of reflected light beams is made variable.Type: GrantFiled: June 14, 2000Date of Patent: November 19, 2002Assignee: Kabushiki Kaisha TopconInventors: Masahiro Ohishi, Masaaki Yabe, Mitsuru Kanokogi