WO2006136490A1 - Reglage fin pour systeme a lentille associe a un mouvement en translation - Google Patents

Reglage fin pour systeme a lentille associe a un mouvement en translation Download PDF

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Publication number
WO2006136490A1
WO2006136490A1 PCT/EP2006/062876 EP2006062876W WO2006136490A1 WO 2006136490 A1 WO2006136490 A1 WO 2006136490A1 EP 2006062876 W EP2006062876 W EP 2006062876W WO 2006136490 A1 WO2006136490 A1 WO 2006136490A1
Authority
WO
WIPO (PCT)
Prior art keywords
pin
helical slit
adjustment arrangement
adjusted member
adjusted
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.)
Ceased
Application number
PCT/EP2006/062876
Other languages
English (en)
Inventor
Harald Burkart
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.)
Thomson Licensing SAS
Original Assignee
Thomson Licensing SAS
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 Thomson Licensing SAS filed Critical Thomson Licensing SAS
Publication of WO2006136490A1 publication Critical patent/WO2006136490A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/24—Base structure
    • G02B21/241—Devices for focusing
    • G02B21/242—Devices for focusing with coarse and fine adjustment mechanism
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/003—Alignment of optical elements
    • G02B7/004—Manual alignment, e.g. micromanipulators
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification

Definitions

  • the invention relates to the coarse and fine adjustment of a lens system for projection television or rear-projection television.
  • Adjustment systems known from the prior art frequently provide either a large displacement range together with quick settability, or a fine adjustment that cannot be performed quickly.
  • the disadvantage here is that the larger the setting range required, the less accurate the achievable accuracy in case no gear reduction is present.
  • a relatively high setting accuracy can be achieved with the aid of a fine thread, e.g. as present in a photo lens. In this case the accuracy depends on the thread pitch, while the setting range is limited only by the thread length. In the extreme case, very many thread revolutions have to be made in order to cover the entire setting range.
  • An adjustment arrangement has a holding member in which a tubular adjusted member is movably supported.
  • the holding member has a helical slit at least partially extending along its circumference.
  • a pin is rotatably mounted to the adjusted member and protrudes through the helical slit.
  • a movement of the pin along the helical slit causes a rotation and a translatory movement of the adjusted member.
  • the pin is further eccentrically mounted to the adjusted member. A rotation of the pin in the helical slit causes a translatory movement of the adjusted member.
  • the helical slit has a shallow inclination and the pin has a large eccentricity.
  • the helical slit has a steep inclination and the pin has a small eccentricity.
  • the invention combines the advantages of the two above-named setting variants: the large setting range of the cam, or eccentric pin with the accuracy of the fine thread.
  • the invention can advantageously be used for adjusting a lens in a projection television.
  • a helical opening that has a flat pitch, corresponding to a fine thread, is provided in a holding element fitted in a fixed fashion.
  • the opening is so widely shaped that an eccentric pin with an eccentricity corresponding to the setting range can be inserted.
  • the eccentric pin is rotatably mounted to a tubular lens arrangement that is movably supported in the holding element.
  • the tubular lens arrangement is the counterpart to the holding element.
  • the eccentric pin is rotated for the purpose of coarse setting, and this effects a translational displacement of the tubular lens arrangement.
  • This rotation is radial to the lens focus direction.
  • the tubular lens arrangement to which the pin is rotatably mounted is rotated in the opening of the holding element without rotating the pin.
  • the rotation in this case is co-axial to the lens focus direction.
  • the co-axial rotation effects a very small translational displacement of the tubular lens arrangement to be set, in accordance with the flat or fine pitch of the helical opening.
  • Figure 1 shows an oblique view of the holding element and the tubular lens arrangement
  • Figure 2 shows an oblique view of the holding element and the tubular lens arrangement with the pin removed
  • Figure 3 illustrates the fine adjustment in a side view of the holding element and the tubular lens arrangement
  • Figure 4 illustrates the coarse adjustment in a side view of the holding element and the tubular lens arrangement.
  • Figure 1 shows an oblique view of the holding element 2 and the tubular lens arrangement 1 according to the invention.
  • a helical slit 3 is cut into a tubular part of the holding element 2.
  • a pin 5 is rotatably attached to the tubular lens arrangement 1 and protrudes through the helical slit 3.
  • the pin 5 is mounted eccentrically to the tubular lens arrangement 1.
  • a rotational movement of the pin around its longitudinal axis results in a rather large translatory displacement of the tubular lens arrangement 1 with respect to the holding element 2.
  • Due to the very shallow inclination of the helical slit 3 a rotational movement of the tubular lens arrangement 1 results in a small translatory displacement of the tubular lens arrangement 1 with respect to the holding element 2.
  • Figure 2 shows an oblique view of a detail of the holding element 2 and the tubular lens arrangement 1.
  • the pin 5 is not mounted to the tubular lens arrangement 1.
  • a bearing 4 which accommodates the pin 5 can be seen through the helical slit 3. Further, the eccentric portion 6 of the pin 5 is visible.
  • Figure 3 illustrates the fine adjustment of the tubular lens arrangement 1 with respect to the holding element 2.
  • the shallow inclination of the helical slit 3 is clearly visible.
  • a movement of the pin in the direction of the arrow 7 results in a corresponding movement of the tubular lens arrangement 1 in the direction of the arrow 8.
  • Figure 4 illustrates the cause adjustment of the tubular lens arrangement 1 with regard to the holding element 2.
  • a rotational movement of the pin 5 in the direction of the arrow 9 will result in a translatory movement of the tubular lens arrangement 1 in the direction of the arrow 10 due to the eccentricity of the bearing of pin 5.
  • the invention advantageously allows for performing a full adjustment of a projection lens system using only a single element.
  • the invention was described in the foregoing with reference to a projection television apparatus, the invention can also be used in all fields requiring a coarse/fine adjustment of parts that can be displaced by translation, for example binoculars, microscopes, screw drives, for example the lead screw of a lathe for displacement of the support.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Lens Barrels (AREA)

Abstract

Selon l’invention, un dispositif de réglage comporte un élément de maintien (2) soutenant de façon mobile un élément tubulaire réglé (1). L’élément de maintien (2) comporte une fente hélicoïdale (3) se prolongeant au moins partiellement le long de sa circonférence. Une broche (5) montée rotative sur l’élément réglé (1) pénètre dans la fente hélicoïdale (3). Le mouvement de la broche (5) le long de la fente hélicoïdale (3) provoque la rotation et le mouvement en translation de l’élément réglé (1). La broche (5) est par ailleurs montée de façon excentrique sur l’élément réglé (1). La rotation de la broche (5) dans la fente hélicoïdale (3) provoque le mouvement en translation de l’élément réglé (1). Le dispositif de réglage peut être avantageusement utilisé pour régler la lentille d’un appareil de télévision à projection.
PCT/EP2006/062876 2005-06-21 2006-06-02 Reglage fin pour systeme a lentille associe a un mouvement en translation Ceased WO2006136490A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005029004.3 2005-06-21
DE102005029004 2005-06-21

Publications (1)

Publication Number Publication Date
WO2006136490A1 true WO2006136490A1 (fr) 2006-12-28

Family

ID=36889210

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/062876 Ceased WO2006136490A1 (fr) 2005-06-21 2006-06-02 Reglage fin pour systeme a lentille associe a un mouvement en translation

Country Status (1)

Country Link
WO (1) WO2006136490A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013190475A (ja) * 2012-03-12 2013-09-26 Nikon Corp レンズ鏡筒及び光学機器
JP2013190474A (ja) * 2012-03-12 2013-09-26 Nikon Corp レンズ鏡筒及び光学機器
JP2016006552A (ja) * 2015-10-13 2016-01-14 キヤノン株式会社 光学装置
JP2017134387A (ja) * 2016-01-21 2017-08-03 パナソニックＩｐマネジメント株式会社 レンズ鏡筒

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4281907A (en) * 1978-08-21 1981-08-04 Canon Kabushiki Kaisha Arrangement for adjusting a member in a lens barrel for effecting a zooming function zoom lenses
GB2149137A (en) * 1983-10-03 1985-06-05 Asahi Optical Co Ltd Zoom lens barrel for variable magnification type copying machine
US4989950A (en) * 1987-12-12 1991-02-05 Minolta Camera Kabushiki Kaisha Lens position correction device
JP2001272607A (ja) * 2000-03-28 2001-10-05 Nikon Corp 調整用粗微動装置を有する顕微鏡

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4281907A (en) * 1978-08-21 1981-08-04 Canon Kabushiki Kaisha Arrangement for adjusting a member in a lens barrel for effecting a zooming function zoom lenses
GB2149137A (en) * 1983-10-03 1985-06-05 Asahi Optical Co Ltd Zoom lens barrel for variable magnification type copying machine
US4989950A (en) * 1987-12-12 1991-02-05 Minolta Camera Kabushiki Kaisha Lens position correction device
JP2001272607A (ja) * 2000-03-28 2001-10-05 Nikon Corp 調整用粗微動装置を有する顕微鏡

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 02 2 April 2002 (2002-04-02) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013190475A (ja) * 2012-03-12 2013-09-26 Nikon Corp レンズ鏡筒及び光学機器
JP2013190474A (ja) * 2012-03-12 2013-09-26 Nikon Corp レンズ鏡筒及び光学機器
JP2016006552A (ja) * 2015-10-13 2016-01-14 キヤノン株式会社 光学装置
JP2017134387A (ja) * 2016-01-21 2017-08-03 パナソニックＩｐマネジメント株式会社 レンズ鏡筒

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