EP2027501A1 - Oculaire de telescope avec pupille de sortie tres eloignee - Google Patents

Oculaire de telescope avec pupille de sortie tres eloignee

Info

Publication number
EP2027501A1
EP2027501A1 EP07722484A EP07722484A EP2027501A1 EP 2027501 A1 EP2027501 A1 EP 2027501A1 EP 07722484 A EP07722484 A EP 07722484A EP 07722484 A EP07722484 A EP 07722484A EP 2027501 A1 EP2027501 A1 EP 2027501A1
Authority
EP
European Patent Office
Prior art keywords
lens
refractive power
femrohrokular
eyepiece
image plane
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Withdrawn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
EP07722484A
Other languages
German (de)
English (en)
Inventor
Sigrun Kammans
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.)
Leica Camera AG
Original Assignee
Leica Camera AG
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 Leica Camera AG filed Critical Leica Camera AG
Publication of EP2027501A1 publication Critical patent/EP2027501A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B25/00—Eyepieces; Magnifying glasses
    • G02B25/001—Eyepieces

Definitions

  • the invention relates to a Fernrohrokular, in particular a Zielfernrohrokular, with far projecting exit pupil for imaging an image plane or a reticence to infinity.
  • the eyepiece consists of a light inlet side arranged in front of the image plane field stop and subsequently from two separate in the light direction by air lens groups, the first consists of two cemented lenses and positive refractive power and the second consists of a simple converging lens.
  • Such eyepieces are light exit side, for example, to rifle scopes, which serve as a sighting device in hunting rifles and the like and have the task to image the image plane of the upstream optical telescope system for observation to infinity.
  • the optical systems of such riflescopes usually consist of a lens, which images the object to be observed in a first intermediate image plane and then by a reversal system in the correct height into a second intermediate image plane.
  • the visor is formed by an optical target (reticle), which can be arranged either in the first or in the second image plane.
  • a Zielfernrohrokular has a different from normal (terrestrial) Fernrohrokularen construction.
  • the seeing eye of the observer in order to be able to survey the entire field of view given by the telescopic sight, the seeing eye of the observer must be arranged in the exit pupil of the telescopic sight. If the exit pupil is too close to the eyepiece, there is a risk of injury to the eye due to the recoil when the weapon is fired.
  • Fernrohrokulare known type for terrestrial telescopes for example, have a formed of a lens of negative refractive power and a lens of positive refractive power Kittglied with positive refractive power, which is arranged downstream of a simple converging lens and have too small distance of the exit pupil.
  • the desired effect can be achieved, for example, by the use of glasses with high refractive indices, which, however, usually leads to great astigmatism and significant distortion.
  • An eyepiece which does not have this disadvantage and yet provides a large pupillary distance is known from CH 250 108 and consists of two cemented lenses, namely a lens negative refractive power of heavy refractory glass and a positive power lens of a low refractive index glass, followed by a simple focusing lens.
  • the eyepiece described there makes use, as can be seen on the lens with positive refractive power, of a further general possibility for increasing the distance of the exit pupil, namely to use lenses with a high deflection.
  • this measure leads to complicated, thick and thus heavy lenses, which often cause an increased Coma error.
  • a heavy eyepiece is disadvantageous for use in riflescopes. Special, usually sensitive glasses are expensive and difficult to machine, often the transmission properties are also poor.
  • the distance of the exit pupil can also be increased by simply increasing the focal length of the eyepiece, without further measures, however, the field of view is restricted beyond measure.
  • the diameter of the eyepiece, the field of view and the reversing system must be increased, which would both disadvantageously increase the space required for the space, as well as the weight of the entire system.
  • the object of the invention was therefore to avoid the disadvantages mentioned and to provide a Femrohrokular simple, compact and without expensive special glasses or too curved lens radii, yet to increase the distance of the exit pupil to eg> 90 mm and at the same time, for these ratios large subjective Field of view, for example greater than 19 ° to realize.
  • Another object of the invention was to easily compensate for the curvature and distortion of the image field caused by a telescope objective and inversion system. At the same time, the Image level, or the reticle be effectively protected against contamination.
  • the focal length of the main eyepiece can be made smaller. This measure also shortens the path required for adjusting the diopter. In this way, the overall length of the eyepiece in the diopter adjustment does not increase as much as with conventional telemetry systems, and the sealing of the system against moisture is simplified.
  • Another advantage of inserting the lens with negative refractive power is that with the same subjective field of view, the diameter of the field stop in the image plane and thus the overall diameter of the femoral tube system can be smaller at this point than without the lens.
  • the first cemented lens arranged on the light entry side is a negative lens (diverging lens) and the second lens is a positive lens (converging lens).
  • the first cemented lens arranged on the light entry side is a negative lens (diverging lens) and the second lens is a positive lens (converging lens).
  • the two cemented lenses are formed as Achromat.
  • the lens of negative refractive power is held at a distance from the field stop and / or the reticle with it in a common socket. In this way, the lens has almost no negative impact on a height or lateral adjustment of the reticle.
  • the lens of negative refractive power is provided with an aspherical surface. It can be made of glass or inexpensively and simply made of plastic. In this case, it is at the same time particularly resistant to the mechanical stresses to which a riflescope is exposed when firing a weapon. In this way, it is also possible to use thin lenses that would burst under mechanical stress when manufactured from glass.
  • a plano-concave lens form can be stored in an advantageous manner particularly easy and close to the reticle in the common version and then has only a small, well controlled influence on the geometric size and position of the image, in addition to the displacement of the exit pupil towards a larger Distance from the eyepiece can also be used to advantage for the correction of distortions.
  • This advantage is particularly pronounced when the focal length of the lens of negative power corresponds to -0.8 to -0 times the focal length of the main eyepiece. The effect is similar to that of a negative field lens.
  • the lenses of the main eyepiece are made of glasses in the light direction such that the first cemented lens has a large refractive index of n> 1, 7 and a small Abbe number v ⁇ 30 and the second cemented lens, as well have a small refractive index n ⁇ 1.65 and a large Abbe number v> 55.
  • the distance between the lens of negative refractive power and the image plane or reticle is at most 0.2 times the focal length of the main eyepiece. In this way, the correction of the aberrations in the eyepiece overall system easier and it is possible to influence by replacing the lens, the position of the exit pupil behind the eyepiece.
  • a larger distance of the exit pupil can be achieved in this way, for example by the use of another lens with stronger negative refractive power, with only a limited subjective subjective field of vision. If the lens, reversing system and main eyepiece remain the same, customer-specific special requirements can be met in this way.
  • Fernrohrokulars invention An embodiment of a Fernrohrokulars invention is shown schematically in the drawing and is explained below with reference to the figure.
  • the figure shows a cross-sectional view through a simplified illustrated Femrohrokular 1, which has a field of view 3 sharply delimiting the image field in a light entry side region.
  • the field stop 3 is formed by a circular opening 4 in a first frame part 7 carrying a reticle 5 and a lens of negative refractive power 6.
  • the plane plane is also represented by a dashed line image plane 9 of the objective and inversion system not shown.
  • a second frame part 10 three lenses LI 1 L2, L3 are stored.
  • the negative cemented lens L1, the pos. Kittgliedlinse L2 and the simple Conveying lens L3 form a unit, which is referred to as the main eyepiece 11.
  • the second socket part 10 is mounted axially displaceably in an eyepiece housing 12 for adjusting the diopter.
  • the focal plane of the main eyepiece 11 coincides with the image plane 9.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Telescopes (AREA)
  • Lenses (AREA)

Abstract

L'invention concerne un oculaire (1) de télescope qui présente une pupille de sortie très éloignée pour former un plan (9) d'image ou une vision vers l'infini et se compose d'un diaphragme (3) de champ disposé du côté (2) de l'entrée de la lumière et de deux groupes de lentilles séparés par l'air dans le sens de la lumière et faisant office d'oculaire (11) principal, le premier étant composé de deux lentilles (L1, L2) mastiquées et présentant une réfringence positive et le deuxième se composant d'une lentille (L3) convergente simple, une lentille à réfringence (6) négative est disposée à proximité du plan (9) d'image ou de la vision dans le sens de la lumière derrière le diaphragme (3) de champ.
EP07722484A 2006-06-03 2007-05-31 Oculaire de telescope avec pupille de sortie tres eloignee Withdrawn EP2027501A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610026419 DE102006026419B4 (de) 2006-06-03 2006-06-03 Zielfernrohrokular mit weit abstehender Austrittspupille
PCT/DE2007/000969 WO2007140747A1 (fr) 2006-06-03 2007-05-31 Oculaire de télescope avec pupille de sortie très éloignée

Publications (1)

Publication Number Publication Date
EP2027501A1 true EP2027501A1 (fr) 2009-02-25

Family

ID=38477019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07722484A Withdrawn EP2027501A1 (fr) 2006-06-03 2007-05-31 Oculaire de telescope avec pupille de sortie tres eloignee

Country Status (3)

Country Link
EP (1) EP2027501A1 (fr)
DE (1) DE102006026419B4 (fr)
WO (1) WO2007140747A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101233978B1 (ko) 2010-09-29 2013-02-18 이동희 광학식 스코프
DE102011001044A1 (de) * 2011-03-02 2012-09-06 Schmidt & Bender Gmbh & Co. Kg Zielfernrohr mit vergrößerter Austrittspupille
DE102018105909B4 (de) * 2017-05-31 2020-10-22 Indivi Optics Gmbh Zielfernrohr für ein Zielfernrohrgewehr, insbesondere Jagdgewehr
US11320239B2 (en) * 2019-11-19 2022-05-03 Raytheon Canada Ltd.—Elcan Compact prismatic optical sight with internal zeroing method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4618221A (en) * 1982-10-27 1986-10-21 Thomas Richard L Adjustable reticle device
DE29720737U1 (de) * 1997-11-22 1998-02-12 Schmidt & Bender GmbH & Co KG Optisch-mechanische Werkstatt, 35444 Biebertal Zielfernrohr

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH250108A (de) * 1946-05-10 1947-08-15 Optikotechna Spolecnost S R O Okular für ein Fernrohr mit sehr grossem Pupillenabstand.
DE975486C (de) * 1949-11-01 1961-12-07 Leitz Ernst Gmbh Fernrohr-Okular mit weitabstehender Austrittspupille und grossem Gesichtsfeld
GB767827A (en) * 1953-10-22 1957-02-06 Cooke Troughton & Simms Ltd Improvements in or relating to eye-pieces for microscopes, telescopes and other optical instruments
DE2337650C2 (de) * 1972-09-05 1984-09-13 Warner Lambert Technologies, Inc., Dallas, Tex. Okular
JPH05215974A (ja) * 1992-01-31 1993-08-27 Nikon Corp 非球面接眼レンズ
JP3381409B2 (ja) * 1994-09-07 2003-02-24 株式会社ニコン 非球面接眼レンズ
DE19746925C1 (de) * 1997-10-24 1998-10-29 Leica Mikroskopie & Syst Mikroskop-Okular mit 10-facher Vergrößerung
JPH11326789A (ja) * 1998-05-18 1999-11-26 Nikon Corp 接眼レンズ
JP4642386B2 (ja) * 2004-06-09 2011-03-02 キヤノン株式会社 ズームレンズ及びそれを有する撮像装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4618221A (en) * 1982-10-27 1986-10-21 Thomas Richard L Adjustable reticle device
DE29720737U1 (de) * 1997-11-22 1998-02-12 Schmidt & Bender GmbH & Co KG Optisch-mechanische Werkstatt, 35444 Biebertal Zielfernrohr

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
KARL MÜTZE ET AL.: "ABC der Optik", 1 January 1961, VERLAG WERNER DAUSIEN HANAU/MAIN, pages: 143 - 143 *
See also references of WO2007140747A1 *

Also Published As

Publication number Publication date
DE102006026419A1 (de) 2007-12-06
WO2007140747A1 (fr) 2007-12-13
DE102006026419B4 (de) 2014-12-04

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