CN101290387B - Image auto-focusing device - Google Patents
Image auto-focusing device Download PDFInfo
- Publication number
- CN101290387B CN101290387B CN2008100616855A CN200810061685A CN101290387B CN 101290387 B CN101290387 B CN 101290387B CN 2008100616855 A CN2008100616855 A CN 2008100616855A CN 200810061685 A CN200810061685 A CN 200810061685A CN 101290387 B CN101290387 B CN 101290387B
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- end cover
- sleeve
- end cap
- rear end
- lens
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Abstract
The invention relates to an automatic image focusing device. The prior automatic focusing device is complex in structure, high in requirements on processing and assembling precision. In the invention, a stator coil is fixedly inlayed in a stator coil mounting groove of the inner sidewall of a shell; a front sleeve-shaped end cover and a back sleeve-shaped end cover are fixed with two end faces of the shell; through holes inside the front end cover and the back end cover form an imaging channel; the sleeve parts of the front end cover and the back end cover stretch into the shell; a part of a sleeve rotor is in threaded connection with the front end cover, and the other part of the sleeve rotor is in threaded connection with the back end cover; a focusing lens is fixed inside the sleeve rotor; the tail parts of the front end cover and the back end cover are arranged separately and have an intermediary space as a motion space for the focusing lens. After the focusing device is electrified, a stator generates a rotating magnetic field, and the sleeve rotor can rotate in forward and reverse directions to drive the focusing lens to move left and right, so as to adjust the focal length of the lens. The focusing device is simple in structure and reduces the requirements on the processing and assembling precision for all links of the focusing device, thereby reducing the cost of the device.
Description
Technical field
The invention belongs to the optical, mechanical and electronic integration field, be specifically related to a kind of image auto-focusing device based on digital technology.
Background technology
The type of focusing that changes focal length is the axial location by certain or certain set of contact lenses in the moving lens, thereby changes the focal length of camera lens, so that object distance can keep image distance constant when changing.It is one of focus method of the most normal employing.The focusing process of this type of focusing can also can be finished by control motor-driven camera lens automatically by manually finishing.
Existing automatic focusing system is made up of lens assembly, motor, driving mechanism, detecting sensor etc., and the motion transmission between motor and the lens assembly realizes that by the driving mechanism that adds driving mechanism is generally rack-and-pinion, rotary screw pair etc.The separate structure of detecting sensor and motor, lens assembly and driving mechanism can make become complicated, cost of the structure of system increase, and makes the processing and the assembly precision of each link of focalizer require to improve simultaneously.Owing to added detecting sensor, detection and data handling procedure in the middle of having formed are introduced error inevitably, and the system focusing accuracy of making is affected.
Summary of the invention
Purpose of the present invention is exactly the deficiency at existing automatic focusing system, and a kind of image auto-focusing device based on digital technology is provided.The present invention adopts the amasthenic lens relative positioning principle of closed-loop control, adopt integrated transmission mechanism, can remove simultaneously the intermediate detection link in the existing focalizer, thereby improve focusing accuracy, reduce the manufacturing and the assembly precision requirement of each link in the focalizer.
The concrete structure of apparatus of the present invention comprises columnar shell, has the stator coil mounting groove along the circumference of shell madial wall, and stator coil fixedly is embedded in the stator coil mounting groove.Front end end cover is fixedlyed connected with two end faces of shell respectively with rear end cap.Described front end end cover and rear end cap are sleeve shaped, and its longitudinal section is the T font; Center line along front end end cover and rear end cap has through hole, and the through hole of front end end cover is corresponding with the lead to the hole site of rear end cap, is formed into the picture passage.The sleeve part of front end end cover and rear end cap is stretched in the shell, and its lateral wall has been attacked screw thread.The sleeve part of front end end cover and rear end cap respectively with the socket of sleeve rotor; Described sleeve rotor is the magnet steel cylinder, interior tapping, and the part of sleeve rotor is connected with the tailing screw flight of front end end cover, a part is connected with the tailing screw flight of rear end cap.Sleeve rotor internal fixation is provided with condenser lens, divides between the afterbody of front end end cover and the afterbody of rear end cap to be arranged, and the space in the middle of it is the space of condenser lens.The head of front end end cover is set with front lens, and the afterbody of rear end cap is set with rear lens, and the head of rear end cap is set with the planar light electric transducer.Front lens, condenser lens, rear lens, planar light electric transducer be successively along the axially parallel setting of focalizer, and axial vertical with focalizer.
The stator of the embedded wired circle of shell among the present invention, the energising back produces rotating magnetic field, and under the effect of stator rotating magnetic field, the sleeve rotor can forward and reversely rotate, and drives the condenser lens move left and right, thereby adjusts lens focus; Wiring board is finished functions such as image definition identification, focus control and the generation of stator rotating magnetic field.
Apparatus of the present invention can realize the direct automatic focus of image, and need not in the middle of the detection link; Integrated transmission mechanism can be avoided the focusing error that causes because of intermediate link, and simple in structure; The focusing process adopts relative position to adjust mode, has reduced the machining precision of each link of focalizer and the requirement of assembly precision, thereby has reduced the cost of device.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
As shown in Figure 1, image auto-focusing device comprises columnar shell 1, has the stator coil mounting groove along the circumference of shell 1 madial wall, and stator coil 2 fixedly is embedded in the stator coil mounting groove.Front end end cover 12 is connected by screw retention with two end faces of shell 1 respectively with rear end cap 9.Front end end cover 12 and rear end cap 9 are sleeve shaped, and its longitudinal section is the T font.Center line along front end end cover 12 and rear end cap 9 has through hole, and the through hole of front end end cover 12 is corresponding with the lead to the hole site of rear end cap 9, is formed into picture passage 5.The sleeve part of front end end cover 12 and rear end cap 9 is stretched in the shell 1, and its lateral wall has been attacked screw thread.The sleeve part of front end end cover 12 and rear end cap 9 respectively with 3 sockets of sleeve rotor.Sleeve rotor 3 is the magnet steel cylinder, interior tapping, and the part of sleeve rotor 3 is connected with the tailing screw flight of front end end cover 12, a part is connected with the tailing screw flight of rear end cap 9.Sleeve rotor 3 internal fixation are provided with condenser lens 11, divide between the afterbody of the afterbody of front end end cover 12 and rear end cap 9 to be arranged, and the space in the middle of it is the space 6 of condenser lens 11.The head of front end end cover 12 is set with front lens 13, and the afterbody of rear end cap 9 is set with rear lens 10, and the head of rear end cap 9 is set with planar light electric transducer 7.Front lens 13, condenser lens 11, rear lens 10, planar light electric transducer 7 be successively along the axially parallel setting of focalizer, and axial vertical with focalizer.Planar light electric transducer 7 is connected with the wiring board 8 of the head that is arranged on rear end cap 9.Planar light electric transducer 7 and wiring board 8 adopt existing mature technology.
During focusing, by 2 energisings of 8 pairs of coil stators of wiring board, the energising back produces rotating magnetic field, and under the rotating magnetic field effect, sleeve rotor 3 can forward and reversely rotate, and drives condenser lens 11 move left and right, thereby adjusts lens focus.
Claims (1)
1. image auto-focusing device, comprise columnar shell, it is characterized in that: the circumference along the shell madial wall has the stator coil mounting groove, and stator coil fixedly is embedded in the stator coil mounting groove, and front end end cover is fixedlyed connected with two end faces of shell respectively with rear end cap;
Described front end end cover and rear end cap are sleeve shaped, and its longitudinal section is the T font; Center line along front end end cover and rear end cap has through hole, and the through hole of front end end cover is corresponding with the lead to the hole site of rear end cap, is formed into the picture passage, divides between the afterbody of front end end cover and the afterbody of rear end cap to be arranged, and the space in the middle of it is the space of condenser lens;
The sleeve part of front end end cover is stretched in the shell, and the lateral wall of the sleeve part of front end end cover has been attacked screw thread; The sleeve part of rear end cap is stretched in the shell, and the lateral wall of the sleeve part of rear end cap has been attacked screw thread; The sleeve part of front end end cover and rear end cap respectively with the socket of sleeve rotor;
Described sleeve rotor is the magnet steel cylinder, interior tapping, and the part of sleeve rotor is connected with the tailing screw flight of front end end cover, a part is connected with the tailing screw flight of rear end cap, and sleeve rotor internal fixation is provided with condenser lens;
The head of front end end cover is set with front lens, and the afterbody of rear end cap is set with rear lens, and the head of rear end cap is set with the planar light electric transducer; Front lens, condenser lens, rear lens, planar light electric transducer be successively along the axially parallel setting of focalizer, and axial vertical with focalizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100616855A CN101290387B (en) | 2008-05-23 | 2008-05-23 | Image auto-focusing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100616855A CN101290387B (en) | 2008-05-23 | 2008-05-23 | Image auto-focusing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101290387A CN101290387A (en) | 2008-10-22 |
| CN101290387B true CN101290387B (en) | 2010-04-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100616855A Expired - Fee Related CN101290387B (en) | 2008-05-23 | 2008-05-23 | Image auto-focusing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101290387B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5751502A (en) * | 1996-01-30 | 1998-05-12 | Nikon Corporation | Lens barrel with built-in ultrasonic motor |
| US6094538A (en) * | 1998-05-22 | 2000-07-25 | Nikon Corporation | Autofocus lens barrel |
| CN1395145A (en) * | 2001-07-06 | 2003-02-05 | 雅客设计有限公司 | Control system of zoom lens of digital camera |
| CN1637455A (en) * | 2003-12-24 | 2005-07-13 | 奥林巴斯株式会社 | Zoom lens barrel |
| CN2896328Y (en) * | 2006-04-19 | 2007-05-02 | 天津三星电机有限公司 | Automatic focusing mechanism of hond-set pick-up lens |
| CN201247340Y (en) * | 2008-05-23 | 2009-05-27 | 杭州电子科技大学 | Image auto-focus device |
-
2008
- 2008-05-23 CN CN2008100616855A patent/CN101290387B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5751502A (en) * | 1996-01-30 | 1998-05-12 | Nikon Corporation | Lens barrel with built-in ultrasonic motor |
| US6094538A (en) * | 1998-05-22 | 2000-07-25 | Nikon Corporation | Autofocus lens barrel |
| CN1395145A (en) * | 2001-07-06 | 2003-02-05 | 雅客设计有限公司 | Control system of zoom lens of digital camera |
| CN1637455A (en) * | 2003-12-24 | 2005-07-13 | 奥林巴斯株式会社 | Zoom lens barrel |
| CN2896328Y (en) * | 2006-04-19 | 2007-05-02 | 天津三星电机有限公司 | Automatic focusing mechanism of hond-set pick-up lens |
| CN201247340Y (en) * | 2008-05-23 | 2009-05-27 | 杭州电子科技大学 | Image auto-focus device |
Non-Patent Citations (2)
| Title |
|---|
| 陈国金等.基于现场可编程门阵列的图像调焦系统.系统工程与电子技术30 2.2008,30(2),209-212. |
| 陈国金等.基于现场可编程门阵列的图像调焦系统.系统工程与电子技术30 2.2008,30(2),209-212. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101290387A (en) | 2008-10-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: China Academy of Machinery Science & Technology, Zhejiang Branch Co., Ltd. Assignor: Hangzhou Electronic Science and Technology Univ Contract record no.: 2011330000661 Denomination of invention: Image auto-focusing device Granted publication date: 20100414 License type: Exclusive License Open date: 20081022 Record date: 20110602 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100414 Termination date: 20140523 |