Title:
MULTI-RING MASK, LIGHT IRRADIATION DEVICE, OPTICAL MICROSCOPE, AND PHOTOACOUSTIC MICROSCOPE
Document Type and Number:
WIPO Patent Application WO/2021/220562
Kind Code:
A1
Abstract:
A light irradiation device 1 condenses light onto the surface or the inside of an object 2 to observe or process the object 2, and includes a laser light source 11, a lens 12, a lens 13, a mask 14, a wave plate 15, and a lens 16. The mask 14 is a multi-ring mask that spatially modulates the intensity of inputted light in a beam cross section and outputs the modulated light, and includes a plurality of ring-shaped light-shielding parts provided around a central position, and a light-transmitting part provided between two adjacent light-shielding parts among the plurality of light-shielding parts. The radial width of each of the two adjacent light-shielding parts among the plurality of light-shielding parts is greater than the radial width of the light-transmitting part provided between the two light-shielding parts. With this arrangement, a light irradiation device capable of condensing light efficiently onto a region smaller than the diffraction limit is achieved.
Inventors:
MATSUMOTO NAOYA (JP)
WATANABE KOYO (JP)
WATANABE KOYO (JP)
Application Number:
PCT/JP2021/001880
Publication Date:
November 04, 2021
Filing Date:
January 20, 2021
Export Citation:
Assignee:
HAMAMATSU PHOTONICS KK (JP)
International Classes:
G02B21/06; G02B3/06; G02B5/00; G02B21/00; G02F1/01
Domestic Patent References:
| WO2018220670A1 | 2018-12-06 | |||
| WO2018084271A1 | 2018-05-11 | |||
| WO2019123958A1 | 2019-06-27 |
Foreign References:
| JP2000010013A | 2000-01-14 | |||
| JP2010205381A | 2010-09-16 | |||
| JP2015082013A | 2015-04-27 | |||
| JP2013076770A | 2013-04-25 | |||
| JP2013130852A | 2013-07-04 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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