JP2003202482A5 - - Google Patents

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Publication number
JP2003202482A5
JP2003202482A5 JP2002000931A JP2002000931A JP2003202482A5 JP 2003202482 A5 JP2003202482 A5 JP 2003202482A5 JP 2002000931 A JP2002000931 A JP 2002000931A JP 2002000931 A JP2002000931 A JP 2002000931A JP 2003202482 A5 JP2003202482 A5 JP 2003202482A5
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JP
Japan
Prior art keywords
group
barrel
cam
fixed
lens barrel
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.)
Abandoned
Application number
JP2002000931A
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Japanese (ja)
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JP2003202482A (en
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Publication date
Application filed filed Critical
Priority to JP2002000931A priority Critical patent/JP2003202482A/en
Priority claimed from JP2002000931A external-priority patent/JP2003202482A/en
Publication of JP2003202482A publication Critical patent/JP2003202482A/en
Publication of JP2003202482A5 publication Critical patent/JP2003202482A5/ja
Abandoned legal-status Critical Current

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【0005】
【発明が解決しようとしている課題】
しかしながら、上記特公平1−154110号公報および特公平6−46255号公報にて開示の固定絞りは、固定部材と移動部材との間に配置されているために、固定絞りを配置するスペースがない光学系や移動レンズ群間に絞りを有する光学系においては、開口絞りを有したレンズ鏡筒構成を採り得ない状況が発生する。
[0005]
[Problems to be solved by the invention]
However, since the fixed diaphragm disclosed in the above Japanese Patent Publication No. 1-154110 and Japanese Patent Publication No. 6-46255 is disposed between the fixed member and the moving member, there is no space for arranging the fixed diaphragm. In an optical system having a stop between the optical system and the moving lens group , a situation occurs in which a lens barrel configuration having an aperture stop cannot be adopted .

1群鏡筒5の外周部には、2つの凸リード5aからなる雄ヘリコイド部が形成されており、固定筒3の内周側に形成された凹リード3aからなる雌ヘリコイド部と係合している。 A male helicoid portion formed of two convex leads 5 a is formed on the outer peripheral portion of the first group barrel 5 and is engaged with a female helicoid portion formed of a concave lead 3 a formed on the inner peripheral side of the fixed tube 3. is doing.

6は2群鏡筒であり、固定筒3の内周に径嵌合している。この2群鏡筒6に設けられたコロ13aは、固定筒3に光軸方向に延びるように形成された直進溝部3bを貫通してカム環4に形成された2群カム溝部4aに係合している。 Reference numeral 6 denotes a second group barrel, which is fitted to the inner periphery of the fixed barrel 3 by a diameter. The roller 13a provided in the second group barrel 6 engages with the second group cam groove 4a formed in the cam ring 4 through the rectilinear groove 3b formed in the fixed cylinder 3 so as to extend in the optical axis direction. is doing.

9は4群鏡筒であり、固定筒3の内周に径嵌合している。この4群鏡筒9に設けられた偏芯コロ13cは、固定筒3に形成された直進溝部3bを貫通してカム環4に設けられた4群カム溝部4cと係合している。 Reference numeral 9 denotes a fourth group barrel, which is fitted to the inner periphery of the fixed barrel 3 by a diameter. The eccentric roller 13 c provided in the fourth group lens barrel 9 is engaged with the fourth group cam groove portion 4 c provided in the cam ring 4 through the rectilinear groove portion 3 b formed in the fixed tube 3.

最後に、TELE・WIDEのバランス出しをフォーカス群(1群鏡筒5)と6群鏡筒11のフランジバック調整により行い、所定のフランジバック寸法に調整する。その後、光学性能を満足するように4群鏡筒9の偏芯コロ13cを回転させて光学調整を行う。以上で投写レンズ鏡筒が完成する。 Finally, TELE / WIDE is balanced by adjusting the flange back of the focus group (first lens barrel 5) and the sixth lens barrel 11, and is adjusted to a predetermined flange back dimension. Thereafter, optical adjustment is performed by rotating the eccentric roller 13c of the fourth group barrel 9 so as to satisfy the optical performance. The projection lens barrel is thus completed.

23は2群鏡筒であり、固定筒21の内周に径嵌合している。2群鏡筒23に設けられたコロ28aは、固定筒21に形成された直進溝部21aを貫通してカム環22に形成された2群カム溝部22aに係合している。 Reference numeral 23 denotes a second group barrel, which is fitted to the inner periphery of the fixed barrel 21 by a diameter. A roller 28 a provided in the second group barrel 23 is engaged with a second group cam groove 22 a formed in the cam ring 22 through a rectilinear groove 21 a formed in the fixed cylinder 21.

2群鏡筒23の後方外周部には、カムフォロア23Aが周方向における複数箇所に、2群鏡筒23に一体形成されている。これらカムフォロア23Aは、3群鏡筒24の内周に3群鏡筒24に一体形成された複数のリードカム24Aに係合している。 The rear peripheral portion of the second group lens barrel 23, the cam follower 23A is a plurality of locations in the circumferential direction, it is integrally formed on the second group lens barrel 23. These cam followers 23 </ b> A are engaged with a plurality of lead cams 24 </ b> A integrally formed with the third group barrel 24 on the inner periphery of the third group barrel 24.

カムフォロア25Aは、5群鏡筒26に一体形成されたリードカム26Aにカム係合している。 Cam follower 25A is in the cam engages the lead cam 26A which is integrally formed on the 5-group barrel 26.

このように構成された投射レンズ鏡筒では、ズームリングを回転させると、これに一体的に連結されたカム環22も回転し、2群〜5群鏡筒23〜26はコロ28a,28bと2群および5群カム溝部22a,22bとのカム作用によって光軸方向に進退する。これにより、変倍が行われる。 In the projection lens barrel configured as described above, when the zoom ring 2 is rotated, the cam ring 22 integrally connected to the zoom ring 2 is also rotated, so that the second to fifth group barrels 23 to 26 have rollers 28a and 28b. And the second and fifth group cam groove portions 22a and 22b advance and retract in the optical axis direction. Thereby, zooming is performed.

JP2002000931A 2002-01-07 2002-01-07 Projecting lens barrel and projection type image display device Abandoned JP2003202482A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002000931A JP2003202482A (en) 2002-01-07 2002-01-07 Projecting lens barrel and projection type image display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002000931A JP2003202482A (en) 2002-01-07 2002-01-07 Projecting lens barrel and projection type image display device

Publications (2)

Publication Number Publication Date
JP2003202482A JP2003202482A (en) 2003-07-18
JP2003202482A5 true JP2003202482A5 (en) 2005-04-14

Family

ID=27641174

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002000931A Abandoned JP2003202482A (en) 2002-01-07 2002-01-07 Projecting lens barrel and projection type image display device

Country Status (1)

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JP (1) JP2003202482A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4666900B2 (en) * 2003-10-23 2011-04-06 キヤノン株式会社 Projection lens barrel and projection-type image display device
JP2005128370A (en) * 2003-10-27 2005-05-19 Pentax Corp Projection optical unit
JP4557210B2 (en) * 2004-06-14 2010-10-06 富士フイルム株式会社 Zoom lens barrel
JP4830515B2 (en) * 2006-01-30 2011-12-07 株式会社ニコン Lens barrel, interchangeable lens, camera system
JP2008134569A (en) * 2006-11-29 2008-06-12 Chinontec Kk Lens barrel and projector device
JP6623693B2 (en) * 2015-11-02 2019-12-25 セイコーエプソン株式会社 Projection optics and projector
CN114942557B (en) * 2022-05-13 2024-01-26 湖南长步道光学科技有限公司 Diaphragm adjusting device and lens with same

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