Title:
RELAY OPTICAL SYSTEM AND TELESCOPE HAVING RELAY OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/090424
Kind Code:
A1
Abstract:
A relay optical system (RL) according to the present invention, which re-forms an image formed on a first image surface (IM1) on a second image surface (IM2), comprises a first lens group (G1) having a positive refractive power, a second lens group (G2) having a positive refractive power, a third lens group (G3) having a positive or negative refractive power, a fourth lens group (G4) having a negative refractive power, and a fifth lens group (G5) having a positive refractive power, said lens groups being sequentially arranged from the first image surface (IM1) side. The imaging magnification of the relay optical system (RL) is changed by moving the second lens group (G2) and the fourth lens group (G4) in directions opposite to each other along the optical axis.
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Inventors:
TOKUNAGA KYOYA (JP)
Application Number:
PCT/JP2019/040255
Publication Date:
May 07, 2020
Filing Date:
October 11, 2019
Export Citation:
Assignee:
NIKON CORP (JP)
International Classes:
G02B15/16; G02B23/00; G02B25/00
Domestic Patent References:
| WO2015125480A1 | 2015-08-27 |
Foreign References:
| JP2007199336A | 2007-08-09 | |||
| JP2012255898A | 2012-12-27 | |||
| JP2015111185A | 2015-06-18 |
Attorney, Agent or Firm:
OHNISHI, Shogo et al. (JP)
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