Title:
CONFOCAL SENSOR
Document Type and Number:
WIPO Patent Application WO/2020/129533
Kind Code:
A1
Abstract:
Provided is a confocal sensor having a wider measuring range. A confocal sensor 1 comprises: a light source 10 that emits light at a plurality of wavelengths; a diffractive lens 130 that causes a chromatic aberration with respect to the light along an optical axis and focuses the light onto an object 200 without another intervening lens; a pinhole 120 through which reflected light passes, the reflected light being a portion of the light that was focused onto and reflected from the object 200 and focused by the diffractive lens 130; and a measuring unit 40 that measures the distance from the diffractive lens 130 to the object 200 on the basis of a wavelength of the reflected light. A distance L2 from the pinhole 120 to the diffractive lens 130 is variable.
Inventors:
MORINO HISAYASU (JP)
TAKASHIMA JUN (JP)
TAKASHIMA JUN (JP)
Application Number:
PCT/JP2019/045611
Publication Date:
June 25, 2020
Filing Date:
November 21, 2019
Export Citation:
Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
International Classes:
G01B11/00
Foreign References:
| JP2014153092A | 2014-08-25 | |||
| JP2012208102A | 2012-10-25 | |||
| JP2018119907A | 2018-08-02 | |||
| JP2005214905A | 2005-08-11 | |||
| JP2008286624A | 2008-11-27 | |||
| US4585349A | 1986-04-29 | |||
| JP2004286608A | 2004-10-14 |
Other References:
See also references of EP 3901568A4
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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