Title:
照明光学系、照明装置、及び照明光学素子
Document Type and Number:
Japanese Patent JP6370626
Kind Code:
B2
Abstract:
An illumination optical element irradiates a predetermined area of an illumination target surface with light in a planar manner. The illumination optical element has an optical surface directed toward the illumination target surface. The optical surface has, in a perpendicular direction which is perpendicular to an optical axis, a plurality of refractive surfaces each of which refracts light toward the predetermined area and which are formed at a constant pitch determined by the predetermined area.
Inventors:
Kentaro Yamazaki
Application Number:
JP2014150901A
Publication Date:
August 08, 2018
Filing Date:
July 24, 2014
Export Citation:
Assignee:
Olympus Endo Technology America Inc.
International Classes:
G03F7/20; G02B3/08; G02B19/00
Domestic Patent References:
| JP62008101A | ||||
| JP1112214A |
Foreign References:
| WO2014037580A1 | ||||
| DE10331768A1 | ||||
| US5005959 | ||||
| US20100150200 |
Attorney, Agent or Firm:
Yoshiyuki Osuga