Mitutoyo Corporation

Kenji Ochi

Naoya Kikuchi

Naoki Shirai

Shinji Takahashi

An optical measuring apparatus including: a measuring apparatus body, a lighting unit, a lighting controller. The lighting unit is demountably mounted on the measuring apparatus and has an LED as a light source. The lighting controller is configured to control the lighting unit according to a light intensity command value. The lighting unit includes a storage unit in which a calibration value is stored. The calibration value generates a light intensity corresponding to the light intensity command value. The lighting controller is configured to read calibration values corresponding to the light intensity command value out from the storage unit of the lighting unit upon receipt of the light intensity command value, and controls the LED on the basis of the calibration value.

Optical measuring apparatus

An optical measuring device includes: a screen having a reference line; a movable stage; an optical system for forming on the screen an optical image of a to-be-measured object placed on the stage; and an edge detecting sensor () for detecting a passage of a measurement edge of the optical image at an arbitrary position on the screen. The optical measuring device further includes: an offset value storage () storing a distance between the reference line and the edge detecting sensor () as an offset value; and a correction data calculator () for correcting measurement data measured with the reference line and the edge detecting sensor () by use of the offset value.

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Hiroshima, Japan

Kenji Ochi