JP4217325B2 - 光量調節装置 - Google Patents

光量調節装置 Download PDF

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Publication number
JP4217325B2
JP4217325B2 JP01352799A JP1352799A JP4217325B2 JP 4217325 B2 JP4217325 B2 JP 4217325B2 JP 01352799 A JP01352799 A JP 01352799A JP 1352799 A JP1352799 A JP 1352799A JP 4217325 B2 JP4217325 B2 JP 4217325B2
Authority
JP
Japan
Prior art keywords
filter
light amount
optical path
aperture
amount adjustment
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.)
Expired - Fee Related
Application number
JP01352799A
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English (en)
Japanese (ja)
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JP2000214514A5 (enExample
JP2000214514A (ja
Inventor
直也 金田
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP01352799A priority Critical patent/JP4217325B2/ja
Publication of JP2000214514A publication Critical patent/JP2000214514A/ja
Publication of JP2000214514A5 publication Critical patent/JP2000214514A5/ja
Priority to US11/558,975 priority patent/US7567286B2/en
Application granted granted Critical
Publication of JP4217325B2 publication Critical patent/JP4217325B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Optical Elements Other Than Lenses (AREA)
  • Diaphragms For Cameras (AREA)
  • Blocking Light For Cameras (AREA)
  • Studio Devices (AREA)
JP01352799A 1998-02-02 1999-01-21 光量調節装置 Expired - Fee Related JP4217325B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP01352799A JP4217325B2 (ja) 1999-01-21 1999-01-21 光量調節装置
US11/558,975 US7567286B2 (en) 1998-02-02 2006-11-13 Image pickup apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP01352799A JP4217325B2 (ja) 1999-01-21 1999-01-21 光量調節装置

Publications (3)

Publication Number Publication Date
JP2000214514A JP2000214514A (ja) 2000-08-04
JP2000214514A5 JP2000214514A5 (enExample) 2006-03-16
JP4217325B2 true JP4217325B2 (ja) 2009-01-28

Family

ID=11835639

Family Applications (1)

Application Number Title Priority Date Filing Date
JP01352799A Expired - Fee Related JP4217325B2 (ja) 1998-02-02 1999-01-21 光量調節装置

Country Status (1)

Country Link
JP (1) JP4217325B2 (enExample)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4590074B2 (ja) * 2000-08-09 2010-12-01 キヤノン株式会社 光量調節装置、レンズ装置および撮像装置
JP4684410B2 (ja) * 2000-12-15 2011-05-18 キヤノン株式会社 光量調節装置、撮影レンズ鏡筒および撮像装置
US7019917B2 (en) 2002-12-03 2006-03-28 Pentax Corporation Lens barrel
JP4878457B2 (ja) * 2005-08-25 2012-02-15 日本精密測器株式会社 絞り装置
JP4510783B2 (ja) * 2006-05-23 2010-07-28 キヤノン株式会社 光学機器
JP2010107946A (ja) * 2008-07-04 2010-05-13 Jsr Corp Ｎｄフィルターおよびその製造方法
JP5310478B2 (ja) * 2008-10-24 2013-10-09 Ｊｓｒ株式会社 Ｎｄフィルターの製造方法
JP5428504B2 (ja) * 2009-04-30 2014-02-26 株式会社Ｊｖｃケンウッド 光量制御装置、撮像装置及び光量制御方法

Also Published As

Publication number Publication date
JP2000214514A (ja) 2000-08-04

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