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Title:
LIGHT PROJECTION DEVICE AND LIGHT PROJECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/021659
Kind Code:
A1
Abstract:
A light projection device (1) is equipped with: a light source (2); a light guide optical system (3); an image-forming optical system (4) for focusing a laser beam (L) and projecting a spot (P1) onto an imaging subject (B); a first scanning unit (5) which spirally scans the spot (P1) by oscillating a mirror, and is positioned between the light guide optical system (3) and the image-forming optical system (4); a second scanning unit (6) for linearly scanning the spot (P1) in a direction along the optical axis A by moving the light source (2), at least part of the light guide optical system (3) and at least part of the image-forming optical system (4) relative to one another along the optical axis (A', A); and a control unit (7) for linearly scanning the spot (P1) during one spiral scanning period by controlling the first and second scanning units (5, 6).

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Inventors:
NAKAJIMA KEIICHIRO (JP)
NAMIKI MITSURU (JP)
FUKUSHIMA IKUTOSHI (JP)
MIKI TAKEHIRO (JP)
Application Number:
PCT/JP2018/027929
Publication Date:
January 30, 2020
Filing Date:
July 25, 2018
Export Citation:
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Assignee:
OLYMPUS CORP (JP)
International Classes:
G02B26/10; A61B1/00; G02B23/26
Foreign References:
JP2017173622A2017-09-28
JP2000505275A2000-04-25
JPH0695016A1994-04-08
Attorney, Agent or Firm:
UEDA, Kunio et al. (JP)
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