WO2024143161A1 - 観察光学系、光学機器および双眼鏡 - Google Patents

観察光学系、光学機器および双眼鏡 Download PDF

Info

Publication number
WO2024143161A1
WO2024143161A1 PCT/JP2023/045970 JP2023045970W WO2024143161A1 WO 2024143161 A1 WO2024143161 A1 WO 2024143161A1 JP 2023045970 W JP2023045970 W JP 2023045970W WO 2024143161 A1 WO2024143161 A1 WO 2024143161A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical system
lens
eyepiece
lens group
observation
Prior art date
Application number
PCT/JP2023/045970
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
歩 槇田
賢典 富田
真美 村谷
妙子 渡士
理紗子 松井
Original Assignee
株式会社ニコンビジョン
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 株式会社ニコンビジョン filed Critical 株式会社ニコンビジョン
Priority to JP2024567715A priority Critical patent/JPWO2024143161A1/ja
Publication of WO2024143161A1 publication Critical patent/WO2024143161A1/ja

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/02—Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B25/00—Eyepieces; Magnifying glasses

Definitions

  • the optical device according to the present invention is configured with the above-mentioned observation optical system.
  • the binoculars according to the present invention have two of the above-mentioned observation optical systems arranged side by side.
  • FIG. 2 is a diagram showing a lens configuration of an observation optical system in the first example.
  • 5A to 5C are diagrams showing various aberrations in the observation optical system according to the first example.
  • 5A to 5C are diagrams illustrating coma aberration in the observation optical system according to the first example.
  • FIG. 13 is a diagram showing a lens configuration of an observation optical system according to a second example.
  • 13A to 13C are diagrams showing various aberrations in the observation optical system according to the second example.
  • 8A to 8C are diagrams illustrating coma aberration in the observation optical system according to the second example.
  • FIG. 13 is a diagram showing the lens configuration of an observation optical system according to a third example.
  • FIG. 13A to 13C are diagrams showing various aberrations in the observation optical system according to the eighth example.
  • 13A to 13C are diagrams illustrating coma aberration in the observation optical system according to the eighth example.
  • FIG. 13 is a diagram showing the lens configuration of an observation optical system according to a ninth example.
  • 13A to 13C are diagrams showing various aberrations in the observation optical system according to the ninth example.
  • 13A to 13C are diagrams illustrating coma aberration in the observation optical system according to the ninth example.
  • FIG. 23 is a diagram showing the lens configuration of an observation optical system according to a tenth example.
  • 19A to 19C are diagrams showing various aberrations in the observation optical system according to the tenth example.
  • 23 is a diagram illustrating coma aberration in the observation optical system according to the tenth example.
  • 23A to 23C are diagrams illustrating coma aberration when correcting an image formed by the objective optical system in the observation optical system according to the tenth example.
  • 23A to 23C are diagrams illustrating coma aberration when correcting an image formed by the objective optical system in the observation optical system according to the tenth example.
  • FIG. 23 is a diagram showing the lens configuration of an observation optical system according to an eleventh example.
  • 19A to 19C are diagrams showing various aberrations in the observation optical system according to the eleventh example.
  • 19A to 19C are diagrams illustrating coma aberration in the observation optical system according to Example 11.
  • 19A to 19C are diagrams illustrating coma aberration when an image formed by an objective optical system in the observation optical system according to Example 11 is corrected.
  • 19A to 19C are diagrams illustrating coma aberration when an image formed by an objective optical system in the observation optical system according to Example 11 is corrected.
  • FIG. 23 is a diagram showing the lens configuration of an observation optical system according to a twelfth example.
  • 19A to 19C are diagrams showing various aberrations in the observation optical system according to the twelfth example.
  • 12 shows coma aberration in the observation optical system according to the twelfth example.
  • 23A to 23C are diagrams illustrating coma aberration when correcting an image formed by the objective optical system in the observation optical system according to the twelfth example.
  • 23A to 23C are diagrams illustrating coma aberration when an image formed by an objective optical system in the observation optical system according to the fifteenth example is corrected.
  • 23A to 23C are diagrams illustrating coma aberration when an image formed by an objective optical system in the observation optical system according to the fifteenth example is corrected.
  • 1 is a cross-sectional view of an optical device (binoculars) according to the present invention.
  • 1 is a cross-sectional view of an optical device (telescope) according to the present invention.
  • the predetermined lens L1p may satisfy the following conditional expression. 18.0 ⁇ ⁇ dL1p ⁇ 35.0 ... (2)
  • the observation optical system LS includes an erecting optical system that is disposed between the objective optical system and the eyepiece optical system and erects the image formed by the objective optical system, the eyepiece optical system observes the image erected by the erecting optical system, and the erecting optical system may be configured to form an anti-vibration lens group that corrects the image formed by the objective optical system by rotating around a predetermined position.
  • the predetermined position may be, for example, a point on the optical axis or a position near the optical axis.
  • conditional expression (6) If the corresponding value of conditional expression (6) exceeds the upper limit, it becomes difficult to correct chromatic aberration. In addition, it becomes difficult to correct various aberrations, such as chromatic aberration, that occur during image stabilization.
  • the upper limit of conditional expression (6) By setting the upper limit of conditional expression (6) to 2.00, 1.50, 1.00, 0.50, or even 0.30, the effect of this embodiment can be made more certain.
  • conditional expression (7) If the corresponding value of conditional expression (7) exceeds the upper limit, the refractive power of the vibration-reduction lens group weakens, making it difficult to maintain the decentering sensitivity required for vibration reduction, and the amount of drive during vibration reduction increases, which is undesirable.
  • the upper limit of conditional expression (7) By setting the upper limit of conditional expression (7) to 0.80, 0.70, 0.65, 0.60, 0.55, 0.50, 0.45, or even 0.40, the effect of this embodiment can be made more certain.
  • the vibration-proof lens group is made up of one lens component.
  • the term “lens component” is sometimes used in this specification, but in this case, it is used as a term meaning both "single lenses and cemented lenses.”
  • the eyepiece optical system consists of a first eyepiece lens group having negative refractive power and a second eyepiece lens group having positive refractive power, arranged in order from the object side along the optical axis, and when an intermediate image is formed between the first eyepiece lens group and the second eyepiece lens group, the following conditional expression may be satisfied: D1/fe2 ⁇ 3.00 (8) where D1 is the distance on the optical axis from the lens surface closest to the object in the eyepiece optical system to the intermediate image, and fe2 is the focal length of the second eyepiece lens group.
  • a specific lens L1p may be provided in the eyepiece optical system. By providing a specific lens L1p in the eyepiece optical system, axial chromatic aberration and lateral chromatic aberration can be effectively corrected.
  • the eyepiece optical system is composed of a first eyepiece lens group having negative refractive power and a second eyepiece lens group having positive refractive power, arranged in order from the object side along the optical axis, an intermediate image is formed between the first eyepiece lens group and the second eyepiece lens group, and a specified lens L1p may be provided in the first eyepiece lens group or the second eyepiece lens group.
  • Figures 1, 4, 7, 10, 13, 16, 19, 22, 25, 28, 33, 38, 43, 48, and 53 are cross-sectional views showing the configurations of the observation optical systems LS(1) to LS(15) according to the first to fifteenth examples.
  • fvr is the focal length of the vibration-proof lens group Gvr
  • Rvr is the radius of curvature of the cemented surface of the cemented lens in the vibration-proof lens group Gvr
  • r1v is the radius of curvature of the object-side lens surface of the positive lens in the vibration-proof lens group Gvr
  • r2v is the radius of curvature of the image-side lens surface of the positive lens in the vibration-proof lens group Gvr.
  • ⁇ gF (ng-nF)/(nF-nC)...(A)
  • focal length f0, radius of curvature R, aperture, and other length units for the entire objective optical system OB listed in all of the following specifications are generally in "mm", but this is not limited to this because the optical system can achieve the same optical performance even when proportionally enlarged or reduced. Also, the same symbols as in this embodiment are used for the specifications of the second to fifteenth embodiments described below.
  • FIG. 1 is a diagram showing the lens configuration of the observation optical system according to the first embodiment.
  • the observation optical system LS(1) according to the first embodiment includes an objective optical system OB, an erecting optical system PR for erecting an image formed by the objective optical system OB, and an eyepiece optical system EP for observing the image formed by the objective optical system OB.
  • the objective optical system OB has positive refractive power and is composed of, arranged from the object side along the optical axis, a cemented lens consisting of a meniscus-shaped negative lens L11 with its convex surface facing the object side and a biconvex positive lens L12, a meniscus-shaped positive lens L13 with its convex surface facing the object side, and a meniscus-shaped negative lens L14 with its convex surface facing the object side.
  • the erecting optical system PR is composed of an erecting prism using an auxiliary prism P1 and a roof prism P2.
  • auxiliary prism P1 and the roof prism P2 are shown in schematic form in Figure 1.
  • the second eyepiece lens group E2 is composed of a cemented lens of a negative lens L23 with a concave shape facing the object side and a positive lens L24 with its convex surface facing the image side, a cemented lens of a positive lens L25 with a biconvex shape and a negative lens L26 with a meniscus shape with its convex surface facing the image side, and a positive lens L27 with a meniscus shape with its convex surface facing the object side.
  • the positive lens L22 corresponds to the predetermined lens L1p that satisfies the above-mentioned conditional expression (1) and the like.
  • the 15th surface is an intermediate image, and is shown in FIG. 1 as Ie.
  • the distance from the 12th surface to the 15th surface corresponds to the above-mentioned D1.
  • the 24th surface corresponds to the eye point, and is shown in FIG. 1 as Eye.
  • Table 1 below lists the specifications of the optical system for the first example.
  • FIG. 2 is a diagram showing various aberrations (spherical aberration, curvature of field, and distortion aberration) of the observation optical system of the first embodiment.
  • FIG. 3 is a diagram showing coma aberrations (meridional coma aberration and sagittal coma aberration) of the observation optical system of the first embodiment. In each aberration diagram of FIG. 2 to FIG.
  • the vertical axis indicates the value normalized with the maximum value of the entrance pupil radius set to 1
  • the horizontal axis indicates the aberration value [mm] for each light ray.
  • the solid line indicates the sagittal image surface for each wavelength
  • the dashed line indicates the meridional image surface for each wavelength.
  • the vertical axis indicates the angle of view [°]
  • the horizontal axis indicates the value of the aberration [mm].
  • the vertical axis indicates the angle of view [°]
  • the horizontal axis indicates the proportion of the aberration in percentage (% value).
  • Each coma aberration diagram shows the value of the aberration when the image height ratio RFH (Relative Field Height) is 0.00, 0.50, 0.70, and 1.00. Note that the same symbols as in this embodiment are used in the aberration diagrams of each embodiment shown below, and duplicate explanations will be omitted.
  • the observation optical system of the first embodiment has excellent optical performance that can obtain an image with various aberrations well corrected.
  • FIG. 4 is a diagram showing the lens configuration of the observation optical system according to the second example.
  • the observation optical system LS(2) according to the second example includes an objective optical system OB, an erecting optical system PR for erecting an image formed by the objective optical system OB, and an eyepiece optical system EP for observing the image formed by the objective optical system OB.
  • the objective optical system OB has positive refractive power and is composed of, arranged from the object side along the optical axis, a cemented lens consisting of a meniscus-shaped negative lens L11 with its convex surface facing the object side and a biconvex positive lens L12, a meniscus-shaped positive lens L13 with its convex surface facing the object side, and a meniscus-shaped negative lens L14 with its convex surface facing the object side.
  • the erecting optical system PR is composed of an erecting prism using an auxiliary prism P1 and a roof prism P2.
  • auxiliary prism P1 and the roof prism P2 are shown in schematic form in FIG. 4.
  • the eyepiece optical system EP has positive refractive power and is composed of a first eyepiece lens group E1 with negative refractive power and a second eyepiece lens group E2 with positive refractive power, arranged in order from the object side along the optical axis, and an intermediate image Ie is formed between the first eyepiece lens group E1 and the second eyepiece lens group E2.
  • the first eyepiece lens group E1 is composed of a cemented lens of a negative lens L21 with a biconcave shape and a positive lens L22 with a meniscus shape with its convex surface facing the object side.
  • FIG. 5 is a diagram showing various aberrations (spherical aberration, field curvature, and distortion) of the observation optical system of the second embodiment.
  • FIG. 6 is a diagram showing coma aberrations (meridional coma aberration and sagittal coma aberration) of the observation optical system of the second embodiment.
  • the objective optical system OB has positive refractive power and is composed of, arranged from the object side along the optical axis, a cemented lens consisting of a meniscus-shaped negative lens L11 with its convex surface facing the object side and a biconvex positive lens L12, a meniscus-shaped positive lens L13 with its convex surface facing the object side, and a meniscus-shaped negative lens L14 with its convex surface facing the object side.
  • the eyepiece optical system EP has a positive refractive power and is composed of a first eyepiece lens group E1 having a negative refractive power and a second eyepiece lens group E2 having a positive refractive power, which are arranged in order from the object side along the optical axis, and an intermediate image Ie is formed between the first eyepiece lens group E1 and the second eyepiece lens group E2.
  • the first eyepiece lens group E1 is composed of a cemented lens of a negative lens L21 having a biconcave shape and a positive lens L22 having a meniscus shape with a convex surface facing the object side.
  • FIG. 8 is a diagram showing various aberrations (spherical aberration, field curvature, and distortion) of the observation optical system of the third embodiment.
  • FIG. 9 is a diagram showing coma aberrations (meridional coma aberration and sagittal coma aberration) of the observation optical system of the third embodiment.
  • the objective optical system OB has positive refractive power and is composed of, arranged from the object side along the optical axis, a cemented lens consisting of a meniscus-shaped negative lens L11 with its convex surface facing the object side and a biconvex positive lens L12, a meniscus-shaped positive lens L13 with its convex surface facing the object side, and a meniscus-shaped negative lens L14 with its convex surface facing the object side.
  • the observation optical system of the fourth embodiment has excellent optical performance that can obtain an image with various aberrations well corrected.
  • the eyepiece optical system EP has positive refractive power and is composed of a first eyepiece lens group E1 with negative refractive power and a second eyepiece lens group E2 with positive refractive power, arranged in order from the object side along the optical axis, and an intermediate image Ie is formed between the first eyepiece lens group E1 and the second eyepiece lens group E2.
  • the first eyepiece lens group E1 is composed of a cemented lens of a biconcave negative lens L21 and a meniscus positive lens L22 with its convex surface facing the object side.
  • Table 5 lists the values of the optical system for the fifth example.
  • the eyepiece optical system EP has positive refractive power and is composed of a first eyepiece lens group E1 with negative refractive power and a second eyepiece lens group E2 with positive refractive power, arranged in order from the object side along the optical axis, and an intermediate image Ie is formed between the first eyepiece lens group E1 and the second eyepiece lens group E2.
  • the first eyepiece lens group E1 is composed of a cemented lens of a biconcave negative lens L21 and a meniscus positive lens L22 with its convex surface facing the object side.
  • the erecting optical system PR is composed of an erecting prism using an auxiliary prism P1 and a roof prism P2.
  • the auxiliary prism P1 and the roof prism P2 are shown in schematic form in FIG. 19.
  • FIG. 20 is a diagram showing various aberrations (spherical aberration, field curvature, and distortion) of the observation optical system of Example 7.
  • FIG. 21 is a diagram showing coma aberrations (meridional coma aberration and sagittal coma aberration) of the observation optical system of Example 7.
  • the observation optical system of the seventh embodiment has excellent optical performance that can effectively correct various aberrations and obtain a stable image even when shaken by hands or vibrated by the device during observation.
  • the objective optical system OB has positive refractive power and is composed of, arranged from the object side along the optical axis, a cemented lens consisting of a biconvex positive lens L11 and a meniscus negative lens L12 with its convex surface facing the image surface side, and a meniscus negative lens L13 with its convex surface facing the object side.
  • FIG. 26 is a diagram showing various aberrations (spherical aberration, field curvature, and distortion) of the observation optical system of Example 9.
  • FIG. 27 is a diagram showing coma aberrations (meridional coma aberration and sagittal coma aberration) of the observation optical system of Example 9.
  • FIG. 38 is a diagram showing the lens configuration of the observation optical system according to the twelfth embodiment.
  • the observation optical system LS (12) according to the twelfth embodiment includes an objective optical system OB, an erecting optical system PR for erecting an image formed by the objective optical system OB, and an eyepiece optical system EP for observing the image formed by the objective optical system OB.
  • the objective optical system OB also includes an anti-vibration lens group Gvr having a positive refractive power that corrects the image formed by the objective optical system by moving in a direction perpendicular to the optical axis.
  • the erecting optical system PR is composed of an erecting prism using an auxiliary prism P1 and a roof prism P2.
  • auxiliary prism P1 and the roof prism P2 are shown in schematic form in Figure 38.
  • the eyepiece optical system EP has positive refractive power and is composed of a first eyepiece lens group E1 with negative refractive power and a second eyepiece lens group E2 with positive refractive power, arranged in order from the object side along the optical axis, with an intermediate image Ie being formed between the first eyepiece lens group E1 and the second eyepiece lens group E2.
  • the first eyepiece lens group E1 is composed of a cemented lens of a negative lens L21 with a concave shape on the image side and a meniscus positive lens L22 with its convex surface facing the object side.
  • Example 1 to 15 values corresponding to each of the conditional expressions (1) to (8) are shown for all Examples (Examples 1 to 15). For the sake of simplicity, Examples 1 to 15 are shown as Ex1 to Ex15. Note that, for Examples 1 to 9 that do not have an anti-vibration lens group, conditional expressions (5) to (7) are omitted. For Examples 14 and 15, the conditional expression corresponding values of two predetermined lenses L1p are shown as Ex14(1), (2) and Ex15(1), (2), respectively.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
PCT/JP2023/045970 2022-12-26 2023-12-21 観察光学系、光学機器および双眼鏡 WO2024143161A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2024567715A JPWO2024143161A1 (enrdf_load_stackoverflow) 2022-12-26 2023-12-21

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022207744 2022-12-26
JP2022-207744 2022-12-26

Publications (1)

Publication Number Publication Date
WO2024143161A1 true WO2024143161A1 (ja) 2024-07-04

Family

ID=91717589

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/045970 WO2024143161A1 (ja) 2022-12-26 2023-12-21 観察光学系、光学機器および双眼鏡

Country Status (2)

Country Link
JP (1) JPWO2024143161A1 (enrdf_load_stackoverflow)
WO (1) WO2024143161A1 (enrdf_load_stackoverflow)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11194263A (ja) * 1998-01-06 1999-07-21 Asahi Optical Co Ltd 観察光学機器の防振光学系
JP2001051209A (ja) * 1999-08-10 2001-02-23 Asahi Optical Co Ltd 防振観察光学系
JP2003035866A (ja) * 1993-12-28 2003-02-07 Pentax Corp リヤコン付き望遠鏡、そのリヤコンバージョンレンズ及び望遠鏡
JP2006301508A (ja) * 2005-04-25 2006-11-02 Canon Inc 接眼レンズ及びそれを用いた光学機器
JP2017219742A (ja) * 2016-06-08 2017-12-14 コニカミノルタ株式会社 観察光学系
JP2021056263A (ja) * 2019-09-27 2021-04-08 キヤノン株式会社 回折面を有した像振れ補正機能を有する観察光学機器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003035866A (ja) * 1993-12-28 2003-02-07 Pentax Corp リヤコン付き望遠鏡、そのリヤコンバージョンレンズ及び望遠鏡
JPH11194263A (ja) * 1998-01-06 1999-07-21 Asahi Optical Co Ltd 観察光学機器の防振光学系
JP2001051209A (ja) * 1999-08-10 2001-02-23 Asahi Optical Co Ltd 防振観察光学系
JP2006301508A (ja) * 2005-04-25 2006-11-02 Canon Inc 接眼レンズ及びそれを用いた光学機器
JP2017219742A (ja) * 2016-06-08 2017-12-14 コニカミノルタ株式会社 観察光学系
JP2021056263A (ja) * 2019-09-27 2021-04-08 キヤノン株式会社 回折面を有した像振れ補正機能を有する観察光学機器

Also Published As

Publication number Publication date
JPWO2024143161A1 (enrdf_load_stackoverflow) 2024-07-04

Similar Documents

Publication Publication Date Title
US8027097B2 (en) Rear attachment lens and image-forming optical system using the same
JP6615159B2 (ja) 光学系及びそれを有する撮像装置
JP5264674B2 (ja) 光学系及びそれを有する光学機器
US8199408B2 (en) Immersion microscope objective lens
US20150378134A1 (en) Zoom lens system
JP3541283B2 (ja) 内焦式望遠レンズ
JP7396473B2 (ja) 光学系及び光学機器
US20210103125A1 (en) Zoom lens, optical apparatus, and method for manufacturing zoom lens
US20200026094A1 (en) Optical system, optical device, and method for manufacturing optical system
JP7414107B2 (ja) 光学系及び光学機器
JP5544926B2 (ja) 撮影レンズ、この撮影レンズを有する光学機器、及び、撮影レンズの製造方法
US11092778B2 (en) Optical system and image pickup apparatus
JP5861472B2 (ja) ズームレンズ及び光学機器
US5691850A (en) Eyepiece
JP2010122536A (ja) ズームレンズ
US5610769A (en) Internal focusing telephoto lens system
US20220244502A1 (en) Optical system, optical apparatus, and method for manufacturing optical system
CN112236704B (zh) 观察光学系统
JP2024019634A (ja) 光学系及び光学機器
WO2024143161A1 (ja) 観察光学系、光学機器および双眼鏡
JP2015087681A (ja) ズームレンズ系
JP7146556B2 (ja) 観察光学系及びそれを有する観察装置
JP6151144B2 (ja) 結像光学系
JP7188253B2 (ja) 変倍光学系、光学機器および変倍光学系の製造方法
JPH10333044A (ja) 顕微鏡対物レンズ

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23911941

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2024567715

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE