JP2004354829A5 - - Google Patents

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Publication number
JP2004354829A5
JP2004354829A5 JP2003154239A JP2003154239A JP2004354829A5 JP 2004354829 A5 JP2004354829 A5 JP 2004354829A5 JP 2003154239 A JP2003154239 A JP 2003154239A JP 2003154239 A JP2003154239 A JP 2003154239A JP 2004354829 A5 JP2004354829 A5 JP 2004354829A5
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JP
Japan
Prior art keywords
lens
rear group
positive
cemented
line
Prior art date
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Application number
JP2003154239A
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Japanese (ja)
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JP2004354829A (en
JP4125179B2 (en
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Publication date
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Priority to JP2003154239A priority Critical patent/JP4125179B2/en
Priority claimed from JP2003154239A external-priority patent/JP4125179B2/en
Publication of JP2004354829A publication Critical patent/JP2004354829A/en
Publication of JP2004354829A5 publication Critical patent/JP2004354829A5/ja
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Publication of JP4125179B2 publication Critical patent/JP4125179B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Claims (3)

絞りを挟んで、負の屈折力を有する前群レンズと、正の屈折力を有する後群レンズとで構成され、後群レンズは少なくとも４枚以上で、正レンズと負レンズの接合レンズを含み、前記接合レンズは、
部分分散比を
Figure 2004354829
t線二次スペクトルを
Figure 2004354829
とした時、
条件式 Δ≦0.0038・・・・・・・・・・・（1）
νdｎ< 30・・・・・・・・・・・・（2）
νｄｐ > 60 ・・・・・・・・・・・・（3）
0.85 <｜R/ｆr｜<1.2 ・・・・・・・（4）
ＮC：C線（波長656．27nm）の屈折率、
ＮF：F線（波長486．13nm）の屈折率、
Ｎt：ｔ線（波長1013．98nm）の屈折率
θctp：後群接合レンズの正レンズの部分分散比、
θctn：後群接合レンズの負レンズの部分分散比
νｄp：後群接合レンズの正レンズのアッべ数、
νｄｎ：後群接合レンズの負レンズのアッべ数
R：後群接合レンズの接合面の曲率半径、
ｆr：後群レンズの焦点距離
を満足することを特徴とする可視光近赤外光用単焦点レンズ。Consists of a front group lens having a negative refractive power and a rear group lens having a positive refractive power across the stop, and includes at least four rear group lenses including a cemented lens of a positive lens and a negative lens. The cemented lens is
Partial dispersion ratio
Figure 2004354829
t-line secondary spectrum
Figure 2004354829
When
Conditional expression Δ ≦ 0.0038 (1)
νdn <30 (2)
νdp> 60 (3)
0.85 <| R / fr | <1.2 (4)
N C : refractive index of C line (wavelength 656.27 nm),
N F : Refractive index of F line (wavelength 486.13 nm),
N t : refractive index of t-line (wavelength 1013.98 nm) θ ctp : partial dispersion ratio of positive lens of rear group cemented lens,
θ ctn : partial dispersion ratio of negative lens of rear group cemented lens νdp: Abbe number of positive lens of rear group cemented lens,
νdn: Abbe number of the negative lens of the rear group cemented lens
R: radius of curvature of the cemented surface of the rear group cemented lens,
fr: a single-focus lens for visible light near infrared light that satisfies the focal length of the rear lens group. 前記後群レンズが、物体側から正レンズ、負レンズと正レンズの接合で正の接合レンズ、及び正レンズで構成されたことを特徴とする請求項１に記載の可視光近赤光用単焦点レンズ。  The single lens for visible light near red light according to claim 1, wherein the rear group lens includes a positive lens from the object side, a positive cemented lens formed by cementing a negative lens and a positive lens, and a positive lens. Focus lens. 絞りから像面までの距離が以下の条件式
条件式
7.0 < L / Y < 8.5 ・・・・・（5）
L：絞りから像面までの距離(ただし、バックフォーカスは、Ｃを空気中に換算した時の距離)、Ｃ：フィルターに相当する平行平面ガラス、Y：対角線の像高（Ｙ=ｆ×ｔａｎＷ（１+DIST/100)、ｗ:半画角、DIST(％):ｗ時の歪曲収差、ｆ:全系の焦点距離）
を満足することを特徴とする請求項１又は２に記載の可視光近赤外光用単焦点レンズ。Conditional expression with the following distance from the aperture to the image plane
7.0 <L / Y <8.5 (5)
L: Distance from the aperture to the image plane (where the back focus is the distance when C is converted into the air), C: Parallel flat glass corresponding to the filter, Y: Image height of the diagonal line (Y = f × tanW) (1 + DIST / 100), w: half angle of view, DIST (%): distortion at w, f: focal length of the entire system)
The single-focus lens for visible light near infrared light according to claim 1 or 2, wherein:
JP2003154239A 2003-05-30 2003-05-30 Single focus lens for visible and near infrared light Expired - Fee Related JP4125179B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003154239A JP4125179B2 (en) 2003-05-30 2003-05-30 Single focus lens for visible and near infrared light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003154239A JP4125179B2 (en) 2003-05-30 2003-05-30 Single focus lens for visible and near infrared light

Publications (3)

Publication Number Publication Date
JP2004354829A JP2004354829A (en) 2004-12-16
JP2004354829A5 true JP2004354829A5 (en) 2005-09-15
JP4125179B2 JP4125179B2 (en) 2008-07-30

Family

ID=34048960

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003154239A Expired - Fee Related JP4125179B2 (en) 2003-05-30 2003-05-30 Single focus lens for visible and near infrared light

Country Status (1)

Country Link
JP (1) JP4125179B2 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100351663C (en) * 2005-03-16 2007-11-28 富士能株式会社 Telephotolens
US7548385B2 (en) 2006-11-06 2009-06-16 Hoya Corporation Wide-angle lens system
KR101026111B1 (en) 2009-04-15 2011-04-05 주식회사 웰텍 Interchangeable lenses for quasi-expert camera
JP5320163B2 (en) * 2009-05-26 2013-10-23 富士フイルム株式会社 Imaging lens and imaging apparatus
JP5286495B2 (en) * 2010-08-02 2013-09-11 株式会社コーヤル LENS DEVICE AND IMAGING DEVICE
TWI452332B (en) * 2012-08-08 2014-09-11 Largan Precision Co Ltd Optical photographing lens system
JP6783549B2 (en) 2016-05-19 2020-11-11 キヤノン株式会社 Optical system and imaging device with it
CN109298507B (en) * 2017-07-25 2021-01-08 宁波舜宇车载光学技术有限公司 Optical lens
KR102326952B1 (en) * 2019-01-04 2021-11-16 엘지이노텍 주식회사 Optical system and camera module for comprising the same
JP7208033B2 (en) * 2019-01-28 2023-01-18 キヤノン株式会社 OPTICAL LENS AND IMAGING DEVICE HAVING THE SAME
CN112684584A (en) * 2021-01-08 2021-04-20 中山联合光电科技股份有限公司 Projection optical system, projection module, and projector
CN113253427B (en) * 2021-05-27 2022-11-15 天津欧菲光电有限公司 Optical system, camera module and electronic equipment
CN116256874B (en) * 2023-05-15 2023-09-15 江西联创电子有限公司 optical lens

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