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GB2403300B - Three group zoom lens system with aspheric surface - Google Patents

Three group zoom lens system with aspheric surface

Info

Publication number
GB2403300B
GB2403300B GB0315073A GB0315073A GB2403300B GB 2403300 B GB2403300 B GB 2403300B GB 0315073 A GB0315073 A GB 0315073A GB 0315073 A GB0315073 A GB 0315073A GB 2403300 B GB2403300 B GB 2403300B
Authority
GB
United Kingdom
Prior art keywords
zoom lens
lens system
aspheric surface
group zoom
group
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
GB0315073A
Other versions
GB0315073D0 (en
GB2403300A (en
Inventor
Kuo-Wen Chang
Ming Liang
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.)
Nucam Corp
Original Assignee
Nucam Corp
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 Nucam Corp filed Critical Nucam Corp
Priority to GB0315073A priority Critical patent/GB2403300B/en
Priority to FR0308387A priority patent/FR2857464B3/en
Priority to DE20310657U priority patent/DE20310657U1/en
Publication of GB0315073D0 publication Critical patent/GB0315073D0/en
Publication of GB2403300A publication Critical patent/GB2403300A/en
Application granted granted Critical
Publication of GB2403300B publication Critical patent/GB2403300B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/143—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only
    • G02B15/1435—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only the first group being negative
    • G02B15/143507—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only the first group being negative arranged -++

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
GB0315073A 2003-06-27 2003-06-27 Three group zoom lens system with aspheric surface Expired - Fee Related GB2403300B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB0315073A GB2403300B (en) 2003-06-27 2003-06-27 Three group zoom lens system with aspheric surface
FR0308387A FR2857464B3 (en) 2003-06-27 2003-07-09 OBJECTIVE SYSTEM
DE20310657U DE20310657U1 (en) 2003-06-27 2003-07-11 Zoom lens system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0315073A GB2403300B (en) 2003-06-27 2003-06-27 Three group zoom lens system with aspheric surface
FR0308387A FR2857464B3 (en) 2003-06-27 2003-07-09 OBJECTIVE SYSTEM
DE20310657U DE20310657U1 (en) 2003-06-27 2003-07-11 Zoom lens system

Publications (3)

Publication Number Publication Date
GB0315073D0 GB0315073D0 (en) 2003-07-30
GB2403300A GB2403300A (en) 2004-12-29
GB2403300B true GB2403300B (en) 2005-08-03

Family

ID=34139214

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0315073A Expired - Fee Related GB2403300B (en) 2003-06-27 2003-06-27 Three group zoom lens system with aspheric surface

Country Status (3)

Country Link
DE (1) DE20310657U1 (en)
FR (1) FR2857464B3 (en)
GB (1) GB2403300B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5262897A (en) * 1991-12-13 1993-11-16 Olympus Optical Co., Ltd. Zoom lens system
US5969878A (en) * 1996-09-09 1999-10-19 Ricoh Company, Ltd. Zoom lens system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5262897A (en) * 1991-12-13 1993-11-16 Olympus Optical Co., Ltd. Zoom lens system
US5969878A (en) * 1996-09-09 1999-10-19 Ricoh Company, Ltd. Zoom lens system

Also Published As

Publication number Publication date
GB0315073D0 (en) 2003-07-30
GB2403300A (en) 2004-12-29
DE20310657U1 (en) 2003-09-18
FR2857464A3 (en) 2005-01-14
FR2857464B3 (en) 2005-06-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20160627