Title:
PROJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/103052
Kind Code:
A1
Abstract:
This projection device (200) is provided with a non-visible imaging unit (211), a projection unit (220), a visible imaging unit (212), an imaging optical system (215), a light guide unit (201), and a light shielding unit (202). The non-visible imaging unit captures a non-visible light image of an object. The projection unit projects a projection image based on the non-visible light image on the object using visible light. The visible imaging unit captures an image of the object on which the projection image is projected. The imaging optical system is provided with a diaphragm (214). The light guide unit guides light entering the imaging optical system and guides light emitted from the projection unit. The light shielding unit is spaced apart from the light guide unit. An aperture value of the diaphragm is set so that the distance difference between the optical distance from a near point of the depth of field to the imaging optical system and the optical distance from the light shielding unit to the imaging optical system is greater than the forward depth of field of the object.
Inventors:
SUZUKI TAKASHI
SAITO TOMOYUKI
SAITO TOMOYUKI
Application Number:
PCT/JP2018/043036
Publication Date:
May 31, 2019
Filing Date:
November 21, 2018
Export Citation:
Assignee:
PANASONIC CORP (JP)
International Classes:
A61B34/20; A61B90/30; G03B21/00
Domestic Patent References:
| WO2015072047A1 | 2015-05-21 | |||
| WO2017043539A1 | 2017-03-16 |
Foreign References:
| US20080004533A1 | 2008-01-03 | |||
| JP2012018293A | 2012-01-26 | |||
| JPH0714412U | 1995-03-10 | |||
| US20080004533A1 | 2008-01-03 |
Other References:
See also references of EP 3701901A4
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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