WO2021084835A1 - 光学系及び光学機器 - Google Patents

光学系及び光学機器 Download PDF

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Publication number
WO2021084835A1
WO2021084835A1 PCT/JP2020/029941 JP2020029941W WO2021084835A1 WO 2021084835 A1 WO2021084835 A1 WO 2021084835A1 JP 2020029941 W JP2020029941 W JP 2020029941W WO 2021084835 A1 WO2021084835 A1 WO 2021084835A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
optical system
lens group
optical
eyepiece
Prior art date
Application number
PCT/JP2020/029941
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
宏大 山根
Original Assignee
株式会社タムロン
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 株式会社タムロン filed Critical 株式会社タムロン
Priority to DE112020005405.5T priority Critical patent/DE112020005405T5/de
Publication of WO2021084835A1 publication Critical patent/WO2021084835A1/ja

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B25/00—Eyepieces; Magnifying glasses
    • G02B25/001—Eyepieces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices

Definitions

  • the optical system When the optical system is used as an eyepiece, light rays are passed from the intermediate image side to the eyepiece side.
  • the optical system can be used as an objective lens by passing a light ray through the optical system in the opposite direction.
  • the optical system can also be used as an objective lens by directing the eyepiece side as referred to in the present invention toward the observation object side. In this case, it is preferable to appropriately illuminate the eyepiece from the intermediate image side to the eyepiece side so that the light reflected by the observation object is imaged as an intermediate image.
  • the first lens group has a positive refractive power.
  • the first lens group is composed of a plurality of positive subgroups.
  • the first A regular subgroup and the first B regular subgroup are composed in this order from the eyepiece side, and an air gap b is provided between the first A regular subgroup and the first B regular subgroup.
  • the air interval b is the largest air interval among the air intervals included in the first lens group.
  • the first lens group preferably has at least one positive lens made of a material satisfying the following conditional expression. 1.8 ⁇ n ⁇ 3 ... (1)
  • n is the refractive index of the material at the wavelength of the light beam used in the optical system.
  • the refractive index means the refractive index at a predetermined wavelength within the wavelength range of the used light beam.
  • the light used is visible light, it means the refractive index in a predetermined wavelength (for example, d-line (587.56 nm)) within the wavelength range (380 nm-710 nm).
  • the lens arranged closest to the eyepiece side in the first lens group a positive meniscus lens having a shape satisfying the above conditional expression (2), a strong positive refractive power is arranged in the first lens group and the light beam height is applied. It is possible to keep the lens as close as possible to the optical axis and suppress the occurrence of aberrations. Therefore, by satisfying the conditional expression (2), high optical performance can be realized while achieving both miniaturization and ultra-wide angle of the optical system.
  • the first lens group is composed of a first A positive subgroup and a first B positive subgroup arranged in order from the eyepiece side.
  • An air gap b is provided between the first A regular subgroup and the first B regular subgroup.
  • the first A positive part group includes a positive meniscus lens having a concave surface facing the eyepiece side in order from the eyepiece side, a biconvex lens, and a junction lens in which a biconvex lens and a negative meniscus lens having a concave surface facing the eyepiece side are joined. It is composed of a negative meniscus lens with a convex surface facing side and a bonded lens in which a biconvex lens is bonded.
  • the first B regular subgroup is composed of a biconvex lens. In this embodiment, the primary image plane is located within the first A regular subgroup.
  • Table 4 shows the surface data of the optical system of Example 4. Further, the values of the eye relief (Er), the viewing angle, and each conditional expression are shown below. Further, FIGS. 2 and 3 show a lateral aberration diagram and a spherical aberration diagram.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
PCT/JP2020/029941 2019-11-01 2020-08-05 光学系及び光学機器 WO2021084835A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112020005405.5T DE112020005405T5 (de) 2019-11-01 2020-08-05 Optisches system und optisches instrument

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019199524A JP7012055B2 (ja) 2019-11-01 2019-11-01 光学系及び光学機器
JP2019-199524 2019-11-01

Publications (1)

Publication Number Publication Date
WO2021084835A1 true WO2021084835A1 (ja) 2021-05-06

Family

ID=75713774

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/029941 WO2021084835A1 (ja) 2019-11-01 2020-08-05 光学系及び光学機器

Country Status (3)

Country Link
JP (1) JP7012055B2 (enrdf_load_stackoverflow)
DE (1) DE112020005405T5 (enrdf_load_stackoverflow)
WO (1) WO2021084835A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117250747B (zh) * 2022-06-10 2024-07-23 深圳纳德光学有限公司 一种目镜光学系统及头戴显示装置
JPWO2024090587A1 (enrdf_load_stackoverflow) * 2022-10-27 2024-05-02
WO2025109742A1 (ja) * 2023-11-24 2025-05-30 株式会社ニコン 顕微鏡対物レンズ、顕微鏡光学系、および顕微鏡装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5685723A (en) * 1979-11-07 1981-07-13 Nagler Albert Astronomical telescope lens
US4720183A (en) * 1986-02-27 1988-01-19 Optical Systems Design, Inc. Extreme wide angle eyepiece with minimal aberrations
JP2014056021A (ja) * 2012-09-11 2014-03-27 Ricoh Imaging Co Ltd 接眼レンズ系

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4747675A (en) 1987-06-01 1988-05-31 Albert Nagler Ultra wide-angle eyepiece
JPH0876032A (ja) 1994-09-07 1996-03-22 Nikon Corp 広視界接眼レンズ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5685723A (en) * 1979-11-07 1981-07-13 Nagler Albert Astronomical telescope lens
US4720183A (en) * 1986-02-27 1988-01-19 Optical Systems Design, Inc. Extreme wide angle eyepiece with minimal aberrations
JP2014056021A (ja) * 2012-09-11 2014-03-27 Ricoh Imaging Co Ltd 接眼レンズ系

Also Published As

Publication number Publication date
JP2021071662A (ja) 2021-05-06
JP7012055B2 (ja) 2022-01-27
DE112020005405T5 (de) 2022-08-11

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