CN201247340Y - Image auto-focus device - Google Patents
Image auto-focus device Download PDFInfo
- Publication number
- CN201247340Y CN201247340Y CNU2008200871464U CN200820087146U CN201247340Y CN 201247340 Y CN201247340 Y CN 201247340Y CN U2008200871464 U CNU2008200871464 U CN U2008200871464U CN 200820087146 U CN200820087146 U CN 200820087146U CN 201247340 Y CN201247340 Y CN 201247340Y
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- CN
- China
- Prior art keywords
- end cover
- rear end
- end cap
- lens
- sleeve
- 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 - Lifetime
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Abstract
The utility model relates to an image automatic focusing device. An existing automatic focusing device has complicated structure and high manufacture precise demands. A stator coil in the image automatic focusing device is fixedly inserted in a stator coil installation slot of the inside wall of an outer shell. A front end cover and a rear end cover in sleeve shapes are fixedly connected with two end surfaces of the outer shell. Through holes of the front end cover and the rear end cover are imaging channels. Sleeve parts of the front end cover and the rear end cover are extended into the outer shell, a part of a sleeve rotor is connected with a tail portion screw thread of the front end cover, and a part of the sleeve rotor is connected with the tail screw thread of the rear end cover. A focusing lens is fixedly arranged in the sleeve rotor, the tail portion of the front end cover and the tail portion of the rear end cover are separately arranged, and the middle space is a movable space of the focusing lens. The stator generates a rotary magnetic field after being powered on and the sleeve rotor can be rotated positively and reversely to drive the focusing lens to move leftwards and rightwards, thereby adjusting the lens focal distance. The image automatic focusing device has simple structure, lowers the requirements of the machining precision and assembly precision in each link of the focusing device, thereby reducing the cost of the device.
Description
Technical field
The utility model belongs to the optical, mechanical and electronic integration field, is 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
The purpose of this utility model is exactly the deficiency at existing automatic focusing system, and a kind of image auto-focusing device based on digital technology is provided.The utility model 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 the utility model device 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 in the utility model, 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.
The utility model device can be realized 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 utility model.
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 11 is connected by screw retention with two end faces of shell 1 respectively with rear end cap 8.Front end end cover 11 and rear end cap 8 are sleeve shaped, and its longitudinal section is the T font.Center line along front end end cover 11 and rear end cap 8 has through hole, and the through hole of front end end cover 11 is corresponding with the lead to the hole site of rear end cap 8, is formed into picture passage 4.The sleeve part of front end end cover 11 and rear end cap 8 is stretched in the shell 1, and its lateral wall has been attacked screw thread.The sleeve part of front end end cover 11 and rear end cap 8 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 11, a part is connected with the tailing screw flight of rear end cap 8.Sleeve rotor 3 internal fixation are provided with condenser lens 10, divide between the afterbody of the afterbody of front end end cover 11 and rear end cap 8 to be arranged, and the space in the middle of it is the space 5 of condenser lens 10.The head of front end end cover 11 is set with front lens 12, and the afterbody of rear end cap 8 is set with rear lens 9, and the head of rear end cap 8 is set with planar light electric transducer 6.Front lens 12, condenser lens 10, rear lens 9, planar light electric transducer 6 be successively along the axially parallel setting of focalizer, and axial vertical with focalizer.Planar light electric transducer 6 is connected with the wiring board 7 of the head that is arranged on rear end cap 8.Planar light electric transducer 6 and wiring board 7 adopt existing mature technology.
During focusing, by 2 energisings of 7 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 10 move left and right, thereby adjusts lens focus.
Claims (1)
1, a kind of 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 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, 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 |
|---|---|---|---|
| CNU2008200871464U CN201247340Y (en) | 2008-05-23 | 2008-05-23 | Image auto-focus device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200871464U CN201247340Y (en) | 2008-05-23 | 2008-05-23 | Image auto-focus device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201247340Y true CN201247340Y (en) | 2009-05-27 |
Family
ID=40731160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200871464U Expired - Lifetime CN201247340Y (en) | 2008-05-23 | 2008-05-23 | Image auto-focus device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201247340Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290387B (en) * | 2008-05-23 | 2010-04-14 | 杭州电子科技大学 | Image auto-focusing device |
-
2008
- 2008-05-23 CN CNU2008200871464U patent/CN201247340Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290387B (en) * | 2008-05-23 | 2010-04-14 | 杭州电子科技大学 | Image auto-focusing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090527 Effective date of abandoning: 20080523 |