Title:
OPTICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/164058
Kind Code:
A1
Abstract:
An optical device comprises: a first optical element that reflects light entering through a subject-image forming optical system with a first wavelength at a higher reflectance than that of light entering with a second wavelength; a display unit for displaying an image; and an observation unit including a second optical element whereon the light reflected by the first optical element and the light emitted from the display unit are incident. The second optical element allows the light with the first wavelength reflected by the first optical element and entering therein to pass therethrough at a first transmittance, allows the light with the second wavelength to pass therethrough at a second transmittance higher than the first transmittance, allows the light with the first wavelength emitted from the display unit and entering therein to reflect at a first reflectance, and allows the light with the second wavelength to reflect at a second reflectance lower than the first reflectance. The observation unit allows an observer to view the subject image formed by the light reflected by the first optical element and the image displayed on the display unit with the images superimposed on each other.
Inventors:
NIKON CORPORATION (JP)
OKUTANI TSUYOSHI (JP)
OKUTANI TSUYOSHI (JP)
Application Number:
PCT/JP2018/008338
Publication Date:
September 13, 2018
Filing Date:
March 05, 2018
Export Citation:
Assignee:
NIKON CORP (JP)
International Classes:
G03B13/06; G03B17/20; G03B19/12; H04N5/225
Foreign References:
| JPH10228057A | 1998-08-25 | |||
| JP2016180938A | 2016-10-13 | |||
| JP2010145674A | 2010-07-01 | |||
| JP2014119629A | 2014-06-30 |
Attorney, Agent or Firm:
NAGAI, Fuyuki et al. (JP)
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