Title:
ズーム対物レンズ
Document Type and Number:
Japanese Patent JP6795365
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a zoom objective lens for microscopy, which offers reduced manufacturing cost when produced with a minimal structural dimensions, and a constant working distance which keeps an object in focus while changing magnification.SOLUTION: The present invention relates to a zoom objective lens with continuously adjustable magnification, comprising five lens groups G, G, G, G, G. The first lens group G, the second lens group G, and the fifth lens group Gare configured to be fixed relative to an object O, while the third lens group Gand the fourth lens group Gare configured to be axially displaceable. The zoom objective lens satisfies conditions described as follows: a variable air gap Lbetween the second lens group Gand the third lens group Gdecreases or has a turning point on a transition from a low magnification β to a high magnification β; the second, third, and fifth lens groups G, G, Ghave positive refractive power; and the fourth lens group Ghas negative refractive power.SELECTED DRAWING: Figure 1
Inventors:
Ren Fu She
Ingofar bush
Matthias Gonshawl
Michael Gegler
Holger Richter
Halalto shadwinkel
Jörg Schaffel
Robin tour nieden
Ingofar bush
Matthias Gonshawl
Michael Gegler
Holger Richter
Halalto shadwinkel
Jörg Schaffel
Robin tour nieden
Application Number:
JP2016188155A
Publication Date:
December 02, 2020
Filing Date:
September 27, 2016
Export Citation:
Assignee:
CARL ZEISS MICROSCOPY GMBH
International Classes:
G02B21/02; G02B15/167
Domestic Patent References:
| JP49117847U | ||||
| JP63008620A | ||||
| JP2262113A | ||||
| JP2000284174A | ||||
| JP7084189A | ||||
| JP2004133341A | ||||
| JP2003066333A |
Foreign References:
| GB996676A | ||||
| DE19541237A1 |
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Atsushi Honda
Hironobu Onda
Atsushi Honda