EP1794637A1 - Objectif de microscope - Google Patents

Objectif de microscope

Info

Publication number
EP1794637A1
EP1794637A1 EP05795023A EP05795023A EP1794637A1 EP 1794637 A1 EP1794637 A1 EP 1794637A1 EP 05795023 A EP05795023 A EP 05795023A EP 05795023 A EP05795023 A EP 05795023A EP 1794637 A1 EP1794637 A1 EP 1794637A1
Authority
EP
European Patent Office
Prior art keywords
lens
focal length
objective
lens group
lenses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05795023A
Other languages
German (de)
English (en)
Inventor
Johannes Winterot
Dirk Jahn
Renhu Shi
Ingo Fahlbusch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Zeiss Microscopy GmbH
Original Assignee
Carl Zeiss MicroImaging GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carl Zeiss MicroImaging GmbH filed Critical Carl Zeiss MicroImaging GmbH
Publication of EP1794637A1 publication Critical patent/EP1794637A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/18—Arrangements with more than one light path, e.g. for comparing two specimens
    • G02B21/20—Binocular arrangements
    • G02B21/22—Stereoscopic arrangements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/02—Objectives

Definitions

  • the invention relates to a microscope objective, in particular for stereomicroscopes, which has a large pupil diameter and is used in reflected-light bright-field illumination.
  • the lenses are usually used in conjunction with afocal magnification changers and exchangeable tubes.
  • objectives are required in which more space is available for suitable magnification changers in the area of readjustment and the also offer a larger usable aperture in the object space.
  • An objective for stereomicroscopes of the telescope type is described in EP 1 369 729 A2, which consists of three optical lens groups, the first lens group being arranged towards the object side and the third lens group being arranged towards a magnification changer.
  • This objective fulfills certain conditions with regard to the diameter of the entrance pupil of the magnification changer arranged downstream of the objective and the maximum field angle of the objective at the lowest magnification.
  • JP 2001-147378 describes a telescope-type lens suitable for use in stereomicroscopes which, viewed from the direction of the microscope body, comprises a first lens group with positive refractive power, a second lens group with at least one triple cemented member and a third lens group with positive Refractive power exists.
  • these lens groups can also comprise individual lenses and also combinations of individual lenses and cemented elements.
  • the objective Seen from the direction of the microscope body, the objective consists of two lens groups, wherein a first lens group with positive refractive power has a biconvex cemented element and a second lens element. group contains at least two cemented limbs.
  • the lens groups can also comprise individual lenses and also combinations of individual lenses and cemented elements.
  • US Pat. No. 6,271,971 describes a telescope-style objective for stereomicroscopes in which the optimization of the ratio of installation space and objective focal length is in the foreground.
  • the invention is based on the object to provide a lens for stereomicroscopes in telescopic construction wel ⁇ Ches with a simple compact structure, the requirements in terms of correction of color error, the distortion, as well as the demands for larger space for Ver ⁇ variable changer and larger usable aperture in Ob ⁇ jektraum met and realized a large working distance and a flat field of view.
  • the lens groups may comprise individual lenses, at least one cemented element or a combination of individual lenses and putty gliders.
  • an advantageous lens has a focal length f> 40 mm and ⁇ 200 mm. It is advantageous if the coupling of the illumination beam path into the exit pupil of the objective is performed.
  • the centers of the entrance pupil of the illumination beam path and the centers of the two beam paths of the objective form an isosceles triangle within the exit pupil of the objective, in which the center of the exit pupil lies.
  • ai and a 2 are the distances of the centers Mi and M 2 of the two beam paths of the objective from the center M of the exit pupil of the objective, and a 3 the distance of the center M 3 of the entrance pupil of the illumination beam path from the center M of the exit pupil of the objective.
  • Lens group satisfies the following condition:
  • the second lens group comprises a cemented element and a single lens, wherein the cemented member is arranged adjacent to the magnification changer and that the focal length of this second lens group satisfies the following condition:
  • the single lens is preferably designed as a meniscus with the convex side facing the object.
  • v e3 are the Abbe's number of lens 2.1.
  • the first lens group has a positive refractive power and consists of a plurality of lenses, of which at least two form a cemented member.
  • the second lens group has a negative refractive power and consists of a collecting cemented element and a scattering lens.
  • This first embodiment comprises two lens groups, where, of object space from a first lens group with positive Brech ⁇ force of two single lenses with positive refractive power and consisting of two lenses Kittrios, followed by a single lens with positive refractive power and a second lens group with negative refractive power from another single lens with negative refractive power and one of two Lenses existing kitt group with positive refractive power be ⁇ stand.
  • This second embodiment likewise comprises two lens groups, wherein, viewed from the object space, a first lens group with positive refractive power consists of a cement consisting of two lenses and a single lens with positive refractive power and a second lens group with negative refractive power, consisting of a single lens with negative refractive power and ei ⁇ ner consisting of two lenses Kittelle is provided with positive refractive power.
  • This third embodiment likewise comprises two lens groups, where, viewed from the object space, a first lens group with positive refractive power consists of two individual lenses with positive refractive power, one consisting of two lenses Kittgrup ⁇ pe and another single lens with positive Brech ⁇ force and a second lens group with negative refractive power from a single lens with negative refractive power and from a ner consisting of two lenses Kittrios positive Brech ⁇ force exist.
  • This third embodiment likewise comprises two lens groups, wherein, seen from object space, a first lens group with positive refractive power consists of two single lenses with positive refractive power, one of two lenses and one further lens with positive refractive power second lens group with nega ⁇ tive refractive power from a single lens with negative Brech ⁇ force and consist of a two lenses putty group positive refractive power.
  • the microscope objective thus created is particularly suitable for use in fluorescence stereomicroscopy in reflected-light brightfield and, above all, offers advantages over known objectives. Furthermore, there are advantages with regard to the correction of the color aberration, the field flattening and the distortion as well as the requirement for larger spaces for the magnification changer downstream of the objective and a larger usable aperture in the object space.
  • the invention will be explained in more detail hereinafter exemplary embodiments. In the drawings show
  • FIG. 1 greatly simplifies the construction of a telescope-type stereomicroscope
  • FIG. 2 shows a first embodiment of an objective
  • FIG. 3 shows a second embodiment of an objective
  • FIG. 4 shows a third exemplary embodiment of an objective
  • FIG. 5 shows the arrangement of the different pupils in FIG
  • Lens pupil Fig.6 a fourth embodiment of an objective.
  • the stereomicroscope comprises an objective 1 which, according to the invention, consists of a first lens group LG1 and a second lens group LG2, viewed from the object 3 to be observed, arranged in an object plane 2.
  • an objective 1 which, according to the invention, consists of a first lens group LG1 and a second lens group LG2, viewed from the object 3 to be observed, arranged in an object plane 2.
  • a magnification changer 8 and 9 as well as tube lenses 10 and 11 are arranged downstream of the objective 1 in two separate beam paths 6 and 7.
  • the object 1 is imaged in the image plane 12 of the respective beam path 7 and 8 as a real intermediate image 13 and 14.
  • an eyepiece 15 and 16 is provided in each beam path 6, 7.
  • the two tube systems hide two partial bundles, which are also parallel to one another, from the parallel radiation bundles offered by the objective 1.
  • an off-axis object point through the lens in a downstream optics, z.
  • the objective viewed from the object plane, comprises a first lens group LG1 in the direction of the image plane 12, and subsequently a second lens group LG2.
  • the lens group LG1 has an overall positive refractive power and the lens group LG2 has an overall negative refractive power.
  • the first lens group LG1 consists of five lenses 1.1 to 1.5, of which the lenses 1.3 and 1.4 are cemented together to form a cemented element.
  • the lens group LG2 consists of a lens 2.1 with negative refractive power and a cemented element 2.2 with positive refractive power.
  • the putty group 2.2 consists of a further lens 2.21 and a lens 2.22 with positive refractive power.
  • This lens 1 has a focal length of 50 mm, an entrance opening of 55 mm and an aperture ratio of 1: 0.9.
  • FIG. 1 An example of a second embodiment of a lens according to the invention is shown in FIG.
  • This lens also has two lens groups LG1 and LG2.
  • the first, object-side lens group LG1 consists of three lenses 1.1 to 1.3, of which the lenses 1.1 and 1.2 are cemented together.
  • the lens group LG2 consists of a lens 2.1 with negative refractive power and one of lenses 2.21 and 2.22 existing cemented 2.2 with positive refractive power.
  • This microscope objective has the following design data with the radii in mm, the distances d in mm, the refractive indices n e and the Abbe's numbers v e :
  • This lens 1 has a focal length of 100 mm, an entrance opening of 55 mm and an opening ratio of 1: 1.8.
  • FIG. 4 shows another objective according to the invention.
  • This microscope objective shown in FIG. 4 has the following design data with the radii in mm, the distances d in mm, the refractive indices n e and the Abbe's number v e :
  • This lens 1 has a focal length of 80 mm, an entrance opening of 55 mm and an opening ratio of 1: 1.45.
  • FIG. 5 shows the position of the various pupils in the exit pupil AP.
  • These are the pupils with the centers Mi and M 2 of the two viewing beam paths of the stereomicroscope and the entrance pupil M 3 of the illumination beam path coupled into the exit pupil AP of the objective 1.
  • These three pupils whose centers are denoted Mi, M 2 and M3 are arranged in the exit pupil AP such that their centers Mi, M2 and M3 form an isosceles triangle, and the center M of the exit pupil AP lies within this triangle, wherein the following conditions are to be fulfilled:
  • ai and a 2 are the distances of the centers Mi and M 2 of the two beam paths of the objective 1 from the center M of the exit pupil AP of the objective 1 and a 3 the distance of the center M3 the entrance pupil of the illumination beam path from the center M of the exit pupil AP of the objective 1 are.
  • FIG. 6 shows another objective according to the invention.
  • This microscope objective shown in FIG. 6 has the following design data with the radii in mm, the distance d in mm, the refractive indices ne and the Abbe' Spur numbers ve:
  • This objective 1 has a focal length of 65.59 mm, an inlet opening of 53.5 mm and an aperture ratio of 1: 1.23.
  • the focal length of the second lens group satisfies the following condition:
  • the cemented element of the second lens group satisfies the condition:
  • the lens (2.1) of the lens group has the condition v e 3 ⁇ 55, where fj is the focal length of the lenses 2.22, f 2 is the focal length of the lens Lenses 2.21, f is the total focal length of the objective, V e i and v e2 are the Abbe's numbers of lenses 2.22 and 2.21, v e3 are the Abbe's number of lens 2.1 lem in that it is apochromatically corrected and also has a high transmission in the near UV spectral range.

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

L'invention concerne un objectif destiné notamment à un stéréomicroscope de type télescope. Cet objectif (1) comprend deux groupes de lentilles (LG1) et (LG2). Le premier groupe de lentilles (LG1) tourné vers le plan objectif a un pouvoir réfringent positif et est constitué de plusieurs lentilles (1.1 à 1.5) dont au moins deux forment un organe lien. Le deuxième groupe de lentilles (LG2) côté image a un pouvoir réfringent négatif et est constitué d'un organe lien collecteur (2.2) et d'une lentille de dispersion (2.1). L'objectif (1) est caractérisé en ce que les conditions suivantes B1 et B2 B1: 46,5 < DAP = 60 et B2: 0,16 = tan ?1 sont satisfaites, DAP représentant le diamètre de la pupille de sortie (AP) de l'objectif (1) et ?1 l'angle de champ maximal.
EP05795023A 2004-10-01 2005-09-28 Objectif de microscope Withdrawn EP1794637A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004048299 2004-10-01
DE102005046476A DE102005046476A1 (de) 2004-10-01 2005-09-26 Mikroskopobjektiv
PCT/EP2005/010473 WO2006037529A1 (fr) 2004-10-01 2005-09-28 Objectif de microscope

Publications (1)

Publication Number Publication Date
EP1794637A1 true EP1794637A1 (fr) 2007-06-13

Family

ID=36089057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05795023A Withdrawn EP1794637A1 (fr) 2004-10-01 2005-09-28 Objectif de microscope

Country Status (4)

Country Link
US (1) US7643216B2 (fr)
EP (1) EP1794637A1 (fr)
DE (1) DE102005046476A1 (fr)
WO (1) WO2006037529A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012042669A (ja) * 2010-08-18 2012-03-01 Sony Corp 顕微鏡制御装置及び光学的歪み補正方法
WO2013063316A1 (fr) 2011-10-25 2013-05-02 Daylight Solutions, Inc. Microscope d'imagerie infrarouge
US9823451B2 (en) 2013-04-12 2017-11-21 Daylight Solutions, Inc. Infrared refractive objective lens assembly
DE102013219383B3 (de) * 2013-09-26 2015-03-12 Carl Zeiss Meditec Ag Optisches Abbildungssystem
DE102013219379B3 (de) * 2013-09-26 2015-03-12 Carl Zeiss Meditec Ag Optisches Abbildungssystem

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3889849B2 (ja) 1996-05-08 2007-03-07 オリンパス株式会社 顕微鏡用対物レンズ及び単対物型双眼実体顕微鏡システム
JP2000284184A (ja) 1999-01-28 2000-10-13 Nikon Corp 平行系実体顕微鏡及び対物レンズ
JP2001147378A (ja) 1999-11-19 2001-05-29 Nikon Corp 平行系実体顕微鏡用対物レンズ系
JP2001166214A (ja) 1999-12-03 2001-06-22 Olympus Optical Co Ltd 光学装置
JP4660873B2 (ja) 2000-02-10 2011-03-30 株式会社ニコン 平行系実体顕微鏡対物レンズ
DE10225192B4 (de) 2002-06-06 2004-09-09 Leica Microsystems (Schweiz) Ag Objektiv für Stereomikroskope vom Teleskop-Typ sowie Stereomikroskop mit einem solchen Objektiv
DE102004048298A1 (de) * 2004-10-01 2006-04-06 Carl Zeiss Jena Gmbh Objektiv für Stereomikroskope

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2006037529A1 *

Also Published As

Publication number Publication date
WO2006037529A1 (fr) 2006-04-13
US7643216B2 (en) 2010-01-05
DE102005046476A1 (de) 2006-04-13
US20080310030A1 (en) 2008-12-18

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