Title:
TELESCOPE AND TELESCOPE SERIES
Document Type and Number:
WIPO Patent Application WO/2020/066224
Kind Code:
A1
Abstract:
A relay optical system (RL) of this telescope has arranged therein, in the following order from the object side: a first lens group (G1) having positive refractive power; a second lens group (G2) having positive refractive power; a third lens group (G3) having positive refractive power; a fourth lens group (G4) having negative refractive power; and a fifth lens group (G5) having positive refractive power, wherein the magnification of the telescope can be changed by causing an image formed on a first image plane (IM1) to be re-formed on a second image plane (IM2) and further causing the second lens group (G2) and the third lens group (G3) to move along the optical axis, and thereby varying the image-forming magnification of the relay optical system (RL).
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Inventors:
OKUBO SHOGO (JP)
Application Number:
PCT/JP2019/027445
Publication Date:
April 02, 2020
Filing Date:
July 11, 2019
Export Citation:
Assignee:
NIKON VISION CO LTD (JP)
International Classes:
G02B13/00; G02B15/167; G02B23/00; G02B25/00
Domestic Patent References:
| WO2016129056A1 | 2016-08-18 |
Foreign References:
| JP2017078725A | 2017-04-27 | |||
| US20140092470A1 | 2014-04-03 | |||
| JP2007199336A | 2007-08-09 | |||
| JP2004226544A | 2004-08-12 | |||
| JPH10319322A | 1998-12-04 |
Attorney, Agent or Firm:
OHNISHI, Shogo et al. (JP)
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