Title:
COAXIAL LIGHTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/095843
Kind Code:
A1
Abstract:
In order to provide a coaxial lighting device with which a field of view can be widened, while being compact, and with which an adjustment operation can be made simple, this coaxial lighting device is provided with a half mirror 1 disposed obliquely on an observation axis A1 joining a workpiece W, which is an observation target, and an observation unit M for observing the workpiece W, a light source 2 which radiates light onto the half mirror 1 from a direction different to the observation axis A1, and which is disposed in such a way that light reflected by the half mirror 1 is radiated onto the workpiece W, a lens 3 provided between the half mirror and the workpiece, and a first aperture 4 provided between the light source 2 and the half mirror 1, wherein the first aperture 4 is disposed at the focal point of the lens 3 on a radiation axis A2 joining the light source 2 and the half mirror 1.
Inventors:
OKAMOTO DAISUKE (JP)
ITAGAKI CHUJI (JP)
ITAGAKI CHUJI (JP)
Application Number:
PCT/JP2019/043065
Publication Date:
May 14, 2020
Filing Date:
November 01, 2019
Export Citation:
Assignee:
CCS INC (JP)
International Classes:
G01N21/84; F21S2/00; F21V5/04; F21V7/00; G02B21/06; G03B15/02; F21Y115/10
Foreign References:
| JPH1152247A | 1999-02-26 | |||
| JPH0727709A | 1995-01-31 | |||
| JP2009063383A | 2009-03-26 | |||
| JP2007114087A | 2007-05-10 | |||
| JP2000329538A | 2000-11-30 |
Attorney, Agent or Firm:
NISHIMURA, Ryuhei (JP)
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