US20080130136A1 - Fine adjustment mechanism for zoom lens assembly - Google Patents
Fine adjustment mechanism for zoom lens assembly Download PDFInfo
- Publication number
- US20080130136A1 US20080130136A1 US11/727,078 US72707807A US2008130136A1 US 20080130136 A1 US20080130136 A1 US 20080130136A1 US 72707807 A US72707807 A US 72707807A US 2008130136 A1 US2008130136 A1 US 2008130136A1
- Authority
- US
- United States
- Prior art keywords
- barrel
- zoom
- adjustment
- ring
- adjustment ring
- 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.)
- Granted
Links
Images
Classifications
-
- 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
Definitions
- the present invention relates generally to a zoom lens assembly and more specifically, to a fine adjustment mechanism for linearly adjusting the initial position of a zoom mechanism of the zoom lens assembly.
- a zoom mechanism is installed in the lens assembly to provide a continuously adjustable focal length.
- a relatively greater travel path is provided for the zoom mechanism to prevent a zoom failure due to the dimensional error.
- a zoom mechanism has a relatively greater travel path, for example the range between position A and position B in FIG. 1
- the needed travel path of the zoom operation is the range between position a and position b in practice. Beyond the range between position a and position b, the lens cannot show the image clearly. Therefore, after assembly of a zoom mechanism, the manufacturer will use a locating ring to support the zoom mechanism, limiting the initial zoom position for the zoom mechanism.
- the locating ring is directly affixed to the barrel that holds the zoom mechanism, the dimensional error of the related parts must be lowered to assure a satisfactory yield rate after assembly. Further, because the locating ring has the whole surface of one side thereof supporting the zoom mechanism, the parallelism is critical, and therefore the manufacturing of the zoom system is difficult.
- the present invention has been accomplished under the circumstances in view. It is therefore one objective of the present invention to provide a fine adjustment mechanism for a zoom lens assembly, which allows fine adjustment of the initial zoom position of a zoom mechanism of the zoom lens assembly so that the manufacturing difficulty of the related parts is reduced.
- the fine adjustment mechanism for linearly moving a zoom mechanism of a zoom lens assembly comprises a barrel and an adjustment ring sleeved onto the barrel.
- the barrel is provided for the mounting of the zoom mechanism for allowing axial movement of the zoom mechanism along the barrel.
- the barrel has a first adjustment portion provided at an outer periphery surface thereof.
- the adjustment ring has a second adjustment portion provided at an inner periphery surface thereof and coupled to the first adjustment portion in such a manner that the adjustment ring is axially moveable along the barrel when the adjustment ring is rotated relative to the barrel.
- the adjustment ring has at least three protrusions spaced on an end face thereof for supporting the zoom mechanism to move the zoom mechanism axially relative to the barrel when the adjustment ring is rotated relative to the barrel.
- FIG. 1 is a schematic drawing illustrating the initial zoom position of a zoom lens assembly
- FIG. 2 is an exploded view of a preferred embodiment of the present invention
- FIG. 3 is a sectional assembly view of the preferred embodiment of the present invention.
- FIG. 4 is similar to FIG. 3 , but showing that the zoom lens is adjusted to the accurate initial zoom position.
- a fine adjustment mechanism 100 for a zoom lens assembly in accordance with a preferred embodiment of the present invention comprises a barrel 10 and an adjustment ring 20 .
- the barrel 12 is a hollow cylindrical member for the mounting of a zoom mechanism 30 of the zoom lens assembly.
- the barrel 12 is provided at the bottom and top parts of the outer periphery surface thereof with a first adjustment portion 11 and a connecting portion 12 respectively.
- the first adjustment portion 11 and the connecting portion 12 each are an external thread.
- the connecting portion 12 is for the mounting of an external member (not shown).
- the barrel 12 further has three grooves 13 equiangularly spaced around the inner periphery surface and extending in axial direction, and three longitudinal sliding slots 14 cut through the outer and inner peripheral surfaces and equiangularly spaced between the first adjustment portion 11 and the connecting portion 12 .
- the adjustment ring 20 is a hollow ring.
- the adjustment ring 20 is provided at its inner periphery surface with a second adjustment portion 21 .
- the second adjustment portion 21 is an internal thread threaded onto the first adjustment portion (external thread) 11 of the barrel 10 so that the adjustment ring 20 can be displaced along the axis of the barrel 10 through a rotary motion.
- the adjustment ring 20 has three protrusions 22 equiangularly spaced on one end face, namely, the top end face.
- the zoom mechanism 30 comprises a zoom ring 31 , a zoom lens set 32 , a spring member 33 and a stop plate 34 .
- the zoom ring 31 is a hollow ring sleeved onto the barrel 10 and supported on the protrusions 22 at the top end face of the adjustment ring 20 .
- the zoom ring 31 has three grooves 311 equiangularly spaced around the inner periphery surface thereof.
- the zoom lens set 32 comprises a lens holder 321 and a lens group 322 fixedly mounted in the lens holder 321 .
- the lens holder 321 is a circular member suspended inside the barrel 10 , having three lugs 323 equiangularly spaced around the outer periphery surface and respectively inserted through the longitudinal sliding slots 14 of the barrel 10 and respectively supported in the zoom grooves 311 inside the zoom ring 31 . Therefore, rotating the zoom ring 31 causes axial displacement of the zoom lens set 32 relative to the barrel 10 along the longitudinal sliding slots 14 of the barrel 10 .
- the spring member 33 is mounted inside the barrel 10 , having one end stopped at the zoom lens set 32 .
- the stop plate 34 is a ring plate fixedly mounted inside the barrel 10 and pressed on the other end of the spring member 33 so that the spring member 33 holds down the zoom lens set 32 .
- the zoom lens set 32 may be in an inaccurate initial zoom position (see FIG. 3 ).
- rotating the adjustment ring 20 through a suitable number of turns relative to the barrel 10 may resolve this problem.
- the zoom ring 31 is forced by the adjustment ring 20 to move axially, such that the zoom lens set 32 is axially moved with the zoom ring 31 along the longitudinal sliding slots 14 of the barrel 10 to the accurate initial zoom position (see FIG. 4 ).
- the zoom lens 322 shows the image clearly.
- an adhesive dispenser can be used to affix the adjustment ring 20 to the barrel 10 with an adhesive.
- the adjustment ring 20 uses the three equiangularly spaced protrusions 22 to support the zoom mechanism 30 , the control of the parallelism between the adjustment ring 20 and the zoom mechanism 30 is easy.
- zoom in/out operation is proceeding.
- the zoom mechanism is not within the point of interest of the present invention, no further detailed description in this regard is necessary. It is to be understood that the aforesaid zoom mechanism 30 is disclosed simply for illustrative purpose. It is an example of various zoom mechanisms, but not a limitation of the present invention.
- the first adjustment portion 11 is an external thread and the second adjustment portion 21 is an internal thread.
- the first adjustment portion and the second adjustment portion can be made in any of a variety of other forms that converts a rotary motion into a linear motion.
- the adjustment ring 20 uses the three equiangularly spaced protrusions 22 to support the zoom ring 31 of the zoom mechanism 30 .
- the adjustment ring 20 can be made having four, five, or more than five equiangularly spaced protrusions for supporting the zoom ring 31 of the zoom mechanism 30 .
Abstract
Description
- 1. Field of the Invention
- The present invention relates generally to a zoom lens assembly and more specifically, to a fine adjustment mechanism for linearly adjusting the initial position of a zoom mechanism of the zoom lens assembly.
- 2. Description of the Related Art
- To fit different requirements for different depth of field and different visual field when taking pictures, a zoom mechanism is installed in the lens assembly to provide a continuously adjustable focal length.
- However, because the parts of a zoom mechanism have a dimensional error during fabrication or installation, a relatively greater travel path is provided for the zoom mechanism to prevent a zoom failure due to the dimensional error. Although a zoom mechanism has a relatively greater travel path, for example the range between position A and position B in
FIG. 1 , the needed travel path of the zoom operation is the range between position a and position b in practice. Beyond the range between position a and position b, the lens cannot show the image clearly. Therefore, after assembly of a zoom mechanism, the manufacturer will use a locating ring to support the zoom mechanism, limiting the initial zoom position for the zoom mechanism. However, because the locating ring is directly affixed to the barrel that holds the zoom mechanism, the dimensional error of the related parts must be lowered to assure a satisfactory yield rate after assembly. Further, because the locating ring has the whole surface of one side thereof supporting the zoom mechanism, the parallelism is critical, and therefore the manufacturing of the zoom system is difficult. - The present invention has been accomplished under the circumstances in view. It is therefore one objective of the present invention to provide a fine adjustment mechanism for a zoom lens assembly, which allows fine adjustment of the initial zoom position of a zoom mechanism of the zoom lens assembly so that the manufacturing difficulty of the related parts is reduced.
- It is another objective of the present invention to provide a fine adjustment mechanism for a zoom lens assembly, which assures the parallelism of the zoom lens.
- To achieve these objectives of the present invention, the fine adjustment mechanism for linearly moving a zoom mechanism of a zoom lens assembly comprises a barrel and an adjustment ring sleeved onto the barrel. The barrel is provided for the mounting of the zoom mechanism for allowing axial movement of the zoom mechanism along the barrel. The barrel has a first adjustment portion provided at an outer periphery surface thereof. The adjustment ring has a second adjustment portion provided at an inner periphery surface thereof and coupled to the first adjustment portion in such a manner that the adjustment ring is axially moveable along the barrel when the adjustment ring is rotated relative to the barrel. The adjustment ring has at least three protrusions spaced on an end face thereof for supporting the zoom mechanism to move the zoom mechanism axially relative to the barrel when the adjustment ring is rotated relative to the barrel.
- The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:
-
FIG. 1 is a schematic drawing illustrating the initial zoom position of a zoom lens assembly; -
FIG. 2 is an exploded view of a preferred embodiment of the present invention; -
FIG. 3 is a sectional assembly view of the preferred embodiment of the present invention, and -
FIG. 4 is similar toFIG. 3 , but showing that the zoom lens is adjusted to the accurate initial zoom position. - As shown in
FIGS. 2-4 , afine adjustment mechanism 100 for a zoom lens assembly in accordance with a preferred embodiment of the present invention comprises abarrel 10 and anadjustment ring 20. - The
barrel 12 is a hollow cylindrical member for the mounting of azoom mechanism 30 of the zoom lens assembly. Thebarrel 12 is provided at the bottom and top parts of the outer periphery surface thereof with afirst adjustment portion 11 and a connectingportion 12 respectively. According to this embodiment, thefirst adjustment portion 11 and the connectingportion 12 each are an external thread. The connectingportion 12 is for the mounting of an external member (not shown). Thebarrel 12 further has threegrooves 13 equiangularly spaced around the inner periphery surface and extending in axial direction, and three longitudinalsliding slots 14 cut through the outer and inner peripheral surfaces and equiangularly spaced between thefirst adjustment portion 11 and the connectingportion 12. - The
adjustment ring 20 is a hollow ring. Theadjustment ring 20 is provided at its inner periphery surface with asecond adjustment portion 21. According to this embodiment, thesecond adjustment portion 21 is an internal thread threaded onto the first adjustment portion (external thread) 11 of thebarrel 10 so that theadjustment ring 20 can be displaced along the axis of thebarrel 10 through a rotary motion. Theadjustment ring 20 has threeprotrusions 22 equiangularly spaced on one end face, namely, the top end face. - For further understanding of the features of the present invention, one embodiment of the zoom mechanism is explained hereinafter.
- The
zoom mechanism 30 comprises azoom ring 31, a zoom lens set 32, aspring member 33 and astop plate 34. Thezoom ring 31 is a hollow ring sleeved onto thebarrel 10 and supported on theprotrusions 22 at the top end face of theadjustment ring 20. Thezoom ring 31 has threegrooves 311 equiangularly spaced around the inner periphery surface thereof. Thezoom lens set 32 comprises alens holder 321 and alens group 322 fixedly mounted in thelens holder 321. Thelens holder 321 is a circular member suspended inside thebarrel 10, having threelugs 323 equiangularly spaced around the outer periphery surface and respectively inserted through thelongitudinal sliding slots 14 of thebarrel 10 and respectively supported in thezoom grooves 311 inside thezoom ring 31. Therefore, rotating thezoom ring 31 causes axial displacement of the zoom lens set 32 relative to thebarrel 10 along the longitudinalsliding slots 14 of thebarrel 10. Thespring member 33 is mounted inside thebarrel 10, having one end stopped at the zoom lens set 32. Thestop plate 34 is a ring plate fixedly mounted inside thebarrel 10 and pressed on the other end of thespring member 33 so that thespring member 33 holds down the zoom lens set 32. - After understanding of the parts of the
fine adjustment mechanism 100 and its mounting with thezoom mechanism 30, the operation and features of thefine adjustment mechanism 100 are described hereinafter. - After assembly of the zoom lens assembly, the
zoom lens set 32 may be in an inaccurate initial zoom position (seeFIG. 3 ). At this time, rotating theadjustment ring 20 through a suitable number of turns relative to thebarrel 10 may resolve this problem. When rotating theadjustment ring 20 relative to thebarrel 10, thezoom ring 31 is forced by theadjustment ring 20 to move axially, such that the zoom lens set 32 is axially moved with thezoom ring 31 along thelongitudinal sliding slots 14 of thebarrel 10 to the accurate initial zoom position (seeFIG. 4 ). When reached to the accurate initial zoom position, thezoom lens 322 shows the image clearly. At this time, an adhesive dispenser can be used to affix theadjustment ring 20 to thebarrel 10 with an adhesive. - Therefore, by means of rotating the
adjustment ring 20 to cause an axial displacement of thezoom mechanism 30, thezoom lens 322 is moved to the initial zoom position to show the image clearly. Because the invention allows fine adjustment of the initial zoom position of thezoom mechanism 30 through theadjustment ring 20, the manufacturing dimensional error of the parts is less critical, and therefore the manufacturing difficulty of the related parts is reduced. Further, theadjustment ring 20 uses the three equiangularly spacedprotrusions 22 to support thezoom mechanism 30, the control of the parallelism between theadjustment ring 20 and thezoom mechanism 30 is easy. - When the user rotates the
zoom ring 31, zoom in/out operation is proceeding. However, because the zoom mechanism is not within the point of interest of the present invention, no further detailed description in this regard is necessary. It is to be understood that theaforesaid zoom mechanism 30 is disclosed simply for illustrative purpose. It is an example of various zoom mechanisms, but not a limitation of the present invention. - Further, in the aforesaid preferred embodiment of the present invention, the
first adjustment portion 11 is an external thread and thesecond adjustment portion 21 is an internal thread. In actual practice, the first adjustment portion and the second adjustment portion can be made in any of a variety of other forms that converts a rotary motion into a linear motion. Further, in the aforesaid preferred embodiment, theadjustment ring 20 uses the three equiangularly spacedprotrusions 22 to support thezoom ring 31 of thezoom mechanism 30. Alternatively, theadjustment ring 20 can be made having four, five, or more than five equiangularly spaced protrusions for supporting thezoom ring 31 of thezoom mechanism 30. - The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW095221258U TWM313791U (en) | 2006-12-01 | 2006-12-01 | Fine tune mechanism of zoom lens |
TW95221258 | 2006-12-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
US7382557B1 US7382557B1 (en) | 2008-06-03 |
US20080130136A1 true US20080130136A1 (en) | 2008-06-05 |
Family
ID=38824751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/727,078 Expired - Fee Related US7382557B1 (en) | 2006-12-01 | 2007-03-23 | Fine adjustment mechanism for zoom lens assembly |
Country Status (2)
Country | Link |
---|---|
US (1) | US7382557B1 (en) |
TW (1) | TWM313791U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114217406A (en) * | 2021-11-30 | 2022-03-22 | 歌尔光学科技有限公司 | Lens focusing mechanism, projection module and electronic equipment |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI383239B (en) * | 2008-09-05 | 2013-01-21 | Hon Hai Prec Ind Co Ltd | Focus device |
WO2013090928A1 (en) * | 2011-12-16 | 2013-06-20 | William Marsh Rice University | Readout & signal transduction (rost) component for poc devices |
TWI705289B (en) * | 2018-09-17 | 2020-09-21 | 群光電子股份有限公司 | Lens device and lens focusing method |
CN109828366B (en) * | 2019-04-08 | 2024-04-16 | 平湖莱顿光学仪器制造有限公司 | Objective turret and microscope |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5510936A (en) * | 1993-01-25 | 1996-04-23 | Asahi Kogaku Kogyo Kabushiki Kaisha | Apparatus for adjusting lens position |
US5754350A (en) * | 1995-08-10 | 1998-05-19 | Asahi Kogaku Kogyo Kabushiki Kaisha | Lens supporting device |
US6046864A (en) * | 1997-09-30 | 2000-04-04 | Fuji Photo Optical Co., Ltd. | Zoom lens barrel assembly for a camera |
US6963455B2 (en) * | 2003-02-05 | 2005-11-08 | Pentax Corporation | Lens barrel |
US20070196094A1 (en) * | 2006-02-17 | 2007-08-23 | Hon Hai Precision Industry Co., Ltd. | Lens module with focusing mechanism |
-
2006
- 2006-12-01 TW TW095221258U patent/TWM313791U/en not_active IP Right Cessation
-
2007
- 2007-03-23 US US11/727,078 patent/US7382557B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5510936A (en) * | 1993-01-25 | 1996-04-23 | Asahi Kogaku Kogyo Kabushiki Kaisha | Apparatus for adjusting lens position |
US5754350A (en) * | 1995-08-10 | 1998-05-19 | Asahi Kogaku Kogyo Kabushiki Kaisha | Lens supporting device |
US6046864A (en) * | 1997-09-30 | 2000-04-04 | Fuji Photo Optical Co., Ltd. | Zoom lens barrel assembly for a camera |
US6963455B2 (en) * | 2003-02-05 | 2005-11-08 | Pentax Corporation | Lens barrel |
US20070196094A1 (en) * | 2006-02-17 | 2007-08-23 | Hon Hai Precision Industry Co., Ltd. | Lens module with focusing mechanism |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114217406A (en) * | 2021-11-30 | 2022-03-22 | 歌尔光学科技有限公司 | Lens focusing mechanism, projection module and electronic equipment |
Also Published As
Publication number | Publication date |
---|---|
TWM313791U (en) | 2007-06-11 |
US7382557B1 (en) | 2008-06-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7382557B1 (en) | Fine adjustment mechanism for zoom lens assembly | |
JP4953874B2 (en) | Lens barrel, imaging device, and information terminal device | |
CN108317483B (en) | Focusing structure of zooming imaging lamp | |
KR970062795A (en) | Lens guide mechanism of lens shutter type camera | |
US7903356B1 (en) | Image pickup apparatus having lens barrel | |
US10120161B2 (en) | Lens barrel and optical apparatus having the same | |
JP2006235287A (en) | Lens barrel | |
JP3915020B2 (en) | Lens barrel structure of zoom lens device | |
US4514039A (en) | Lens mounting | |
JP2008249982A (en) | Lens barrel | |
US10191240B2 (en) | Lens barrel | |
US11106003B2 (en) | Lens barrel and imaging apparatus | |
JP5150845B2 (en) | Optical component position adjusting device and position adjusting method | |
JP2017026964A (en) | Device and method for manufacturing lens unit | |
US8369035B2 (en) | Apparatus for adjusting position of optical element | |
JP2007041151A (en) | Lens driving device | |
US8117936B2 (en) | Gear support structure | |
US4340280A (en) | Drive connection mechanism for adjustable lens system | |
US20150268443A1 (en) | Optical Device | |
JPH0233202Y2 (en) | ||
JP2007003581A (en) | Lens barrel | |
US8755130B2 (en) | Zoom lens device | |
CN109471237A (en) | A kind of axially adjustable mirror support device | |
US10641985B2 (en) | Lens barrel and optical apparatus | |
CN217846876U (en) | Automatic focusing lens for projector and projector |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: GENIUS ELECTRONIC OPTICAL CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LI, HUNG-CHIH;REEL/FRAME:019255/0680 Effective date: 20070307 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20200603 |