CN108784646A - A kind of auxiliary focusing cylinder and focusing assisted Selection system, method - Google Patents
A kind of auxiliary focusing cylinder and focusing assisted Selection system, method Download PDFInfo
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- CN108784646A CN108784646A CN201810211166.6A CN201810211166A CN108784646A CN 108784646 A CN108784646 A CN 108784646A CN 201810211166 A CN201810211166 A CN 201810211166A CN 108784646 A CN108784646 A CN 108784646A
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- 238000000034 method Methods 0.000 title abstract description 7
- 238000003384 imaging method Methods 0.000 claims abstract description 15
- 230000003321 amplification Effects 0.000 claims abstract description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 7
- 238000010187 selection method Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000002687 intercalation Effects 0.000 claims description 3
- 238000009830 intercalation Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 210000001508 eye Anatomy 0.000 description 4
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 210000001525 retina Anatomy 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 239000013013 elastic material Substances 0.000 description 2
- 210000003733 optic disk Anatomy 0.000 description 2
- 210000001747 pupil Anatomy 0.000 description 2
- 241000937378 Everettia interior Species 0.000 description 1
- 208000017442 Retinal disease Diseases 0.000 description 1
- 206010038923 Retinopathy Diseases 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 210000005252 bulbus oculi Anatomy 0.000 description 1
- 210000003161 choroid Anatomy 0.000 description 1
- 208000027129 choroid disease Diseases 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 210000004220 fundus oculi Anatomy 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 210000002189 macula lutea Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004089 microcirculation Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/14—Arrangements specially adapted for eye photography
- A61B3/15—Arrangements specially adapted for eye photography with means for aligning, spacing or blocking spurious reflection ; with means for relaxing
- A61B3/152—Arrangements specially adapted for eye photography with means for aligning, spacing or blocking spurious reflection ; with means for relaxing for aligning
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Abstract
The present invention relates to a kind of auxiliary focusing cylinder and focusing assisted Selection system, methods, auxiliary focusing cylinder includes the cylinder of both ends open and internal run-through, the cylinder is located at the inner cavity between its both ends open and shrinks the horn-like of head end amplification in tail end, and auxiliary focusing helical ring is connected in the cavity wall of the inner cavity.Auxiliary focusing cylinder in the present invention both can be used alone so that system does not support third party software to carry out the smart mobile phones such as the Android of specified focal length manual focus and equivalent functions may be implemented（On barrel lenght direction, to be spirally extended continuously, the equivalent functions of manual focus may be implemented by focusing to the selection of different convex blocks on auxiliary focusing helical ring in auxiliary focusing helical ring）, for ensureing that the picture quality of many digital imaging techniques using smart mobile phone is obviously improved.
Description
Technical field
The present invention relates to ophthalmology field of medical appliances, and in particular to a kind of auxiliary focusing cylinder and focusing assisted Selection system
System, method.
Background technology
Through the intraocular part that pupil can be seen, the i.e. interior lining of eyeball, including retina, optic disk and macula lutea.Due to
The transparency of retina, this term also include Bruch films and choroid.Eyeground, which is that human body is only, can be immediately seen blood circulation
Microcirculation part.The disease on eyeground, including retina, optic disk and choroidal disease, are commonly referred to as retinopathy.Many eyeground
Disease is in close relations with the change of vitreum, and therefore, vitreum lesion is also included within interior.
Doctor observes the eyeground pathological changes situation of patient, including lighting system and sight by traditional direct ophthalmoscope before
Examine system, its basic principle be light is projected into those who are investigated's intraocular by being detected the pupil of eye using ophthalmoscope, then by
Intraocular of the image formation by rays that those who are investigated eyeground is reflected in examiner.Traditional direct ophthalmoscope does not have shooting and records
Function, different doctors look into the fundus oculi disease sight of patient and judge that subjectivity is larger, and can not form visual case history pipe
Reason.It such as needs eye fundus image to have to at fixed instrument just take pictures, especial patient is inconvenient.
With the enhancing of smart mobile phone photographing module performance, the digitalized image equipment based on smart mobile phone gradually obtains special
The approval of industry user.Its most representational application field includes portable medical technology, such as shooting under microscope
The image and the indirect inspectoscope of combination of high magnification amplification shoot eye fundus image.Eye is examined indirectly for the digitlization based on smart mobile phone
Mirror, within the several years in past, not only educational circles is gradually approved, and commercially produced product has occurred.Before applicant also it is proposed that
The patent application of " a kind of mobile phone eyeground shooting frame ".
In fixed or relatively stable photographed scene, typically by picture shooting assembly by adjusting stationary lens and photosensitive element
Between relative distance so that determine optimal imaging plane, when lens at real image in optimal imaging plane when, camera obtain figure
Image quality amount is highest；After current when offset, image can obscure.In view of in the same optical system, focal length with most preferably at
Image plane is one-to-one relationship, thus can also be with focal length come the optimal imaging plan-position of acute pyogenic infection of finger tip.
But for most commonly seen Android or other types of mobile phone, such scheme can not ensure stable effect,
Technical reason is the manual adjusting that can not achieve mobile phone focal length by most mobile phone operating system so that accurately right manually
Burnt function can not be directly realized by by software.The camera model of most of smart mobile phone only supports automatic focusing function, without propping up
Hold manual focus.
It needs exact focus for many while being vulnerable to the interference such as slow, reflective, the hand-held shake of Mobile phone automatic focusing speed,
It is difficult to reach accurate, clearly photographing request.So how rapidly cooperation mobile phone carries out clearly eyeground shooting as urgently
The technical issues of need to solving.
Invention content
The technical problem to be solved by the present invention is to：It is proposed a kind of auxiliary focusing cylinder and coordinate the auxiliary focusing cylinder can between
Connect focusing assisted Selection system, the method for realizing that mobile phone focal length is adjusted manually.
The technical solution (one) that the present invention proposes to solve above-mentioned technical problem is：A kind of auxiliary focusing cylinder, including both ends
The front opening of the cylinder of opening and internal run-through, the cylinder is used for connecting imaging len, the tail end opening of the cylinder
Pass through in for light；
The cylinder is located at the inner cavity between its both ends open and shrinks the horn-like of head end amplification in tail end, the inner cavity
Auxiliary focusing helical ring is connected in cavity wall；
The auxiliary focusing helical ring is spliced to form with helical stand scalariform by several section convex blocks, the end edge of the convex block
The radial level of the cylinder extends internally.
Further, it often saves the convex block and is provided with auxiliary focusing texture at its top surface towards cylinder tail end direction.
Further, further include fixed frame, the outer wall shape of the fixed frame is mutually fitted with the cavity wall shape, described several
The convex block for saving the helically step-like splicing of formula is connected on the fixed frame inner wall, and the fixed frame is for intercalation in the cylinder
In the inner cavity of body.
Further, the fixed frame is by C-shaped root edge, C-shaped apical margin and to be connected between the C-shaped root edge, C-shaped apical margin
Support plate constitute, the C-shaped root edge, C-shaped apical margin and support plate are all made of elastic material and are made；
The flange for forming blocking limit to the C-shaped root edge of an annular is additionally provided at the cavity wall front end.
Further, there is internal thread with threaded in tail end opening in the front opening of the cylinder.
The technical solution (two) that the present invention proposes to solve above-mentioned technical problem is：A kind of focusing assisted Selection system,
For according to control information input by user, auxiliary pair in technical solution (one) to be directed to the output of the focusing control module of mobile phone
The centre coordinate and dimension information of certain target focusing area on burnt helical ring.
Further, including auxiliary focusing helical ring identifies determining module, suitable for being adopted according to by mobile phone cmos sensor
The present preview image of collection positions it color characteristic using auxiliary focusing helical ring, and as unit of pixel, measures it
Center position coordinates (x0,y0), internal diameter riPixel, outer diameter roPixel, the inside and outside diameter mean value r are r=(ri+ro)/2, auxiliary pair
The start angle θ and termination point-θ of burnt helical ring；
Virtual focal length user's input module is suitable for receiving the value of virtual focal length p input by user；
Focusing area computing module, suitable for calculating separately out the regional center angle Ф of target focusing area by following equation
With centre coordinate (xp,yp),
Φ=p (360 ° of -2 θ)+θ
xp=x0+r·sinΦ
yp=y0-r·cosΦ；
Focusing message output module, is suitable for the centre coordinate (x of target focusing areap,yp) information exports to pair of mobile phone
Burnt control module.
Further, the virtual focal length user input module includes for always showing the touch-screen in mobile phone
On slide block type value input mouth.
The technical solution (three) that the present invention proposes to solve above-mentioned technical problem is：A kind of focusing assisted selection method,
Include the following steps：
It is special to the color using auxiliary focusing helical ring according to the present preview image acquired by mobile phone cmos sensor
Sign positions it, and as unit of pixel, measures its center position coordinates (x0,y0), internal diameter riPixel, outer diameter roPixel, it is described
Inside and outside diameter mean value r is r=(ri+ro)/2, the start angle θ of auxiliary focusing helical ring and termination point-θ；
Receive the value of virtual focal length p input by user；
The regional center angle Ф and centre coordinate (x of target focusing area are calculated separately out by following equationp,yp),
Φ=p (360 ° of -2 θ)+θ
xp=x0+r·sinΦ
yp=y0-r·cosΦ；
By the centre coordinate (x of target focusing areap,yp) information exports to the focusing control module of mobile phone.
The beneficial effects of the invention are as follows：
Auxiliary focusing cylinder in the present invention both can be used alone so that system does not support third party software to carry out specified coke
Equivalent functions may be implemented in the smart mobile phones such as the Android away from manual focus, and (auxiliary focusing helical ring is on barrel lenght direction with spiral shell
It is rotating to be extended continuously, by the work(of equal value that the selection focusing of different convex blocks on auxiliary focusing helical ring may be implemented manual focus
Can), for ensureing that the picture quality of many digital imaging techniques using smart mobile phone is obviously improved.
In addition, the auxiliary focusing cylinder in the present invention can be used again with system, method in combination technology scheme (two) or (three),
Auxiliary focusing ring in preview screen is clicked without user, it is only necessary to which it inputs virtual focal length in a manner of sliding block etc..This to work as picture
When face causes focusing ring to exceed the preview visual field by number amplification, previous manual focusing still can normal use.
Description of the drawings
The auxiliary focusing cylinder to the present invention and focusing assisted Selection system, method are made furtherly below in conjunction with the accompanying drawings
It is bright.
Fig. 1 is the structural schematic diagram of auxiliary focusing cylinder in the present invention；
Fig. 2 is that the structure of auxiliary focusing cylinder in the present invention cuts open schematic diagram；
Fig. 3 is the structure cut-away view of cylinder；
Fig. 4 is the structural schematic diagram (longitudinal direction) of fixed frame and auxiliary focusing helical ring；
Fig. 5 is the structural schematic diagram (transverse direction) of fixed frame and auxiliary focusing helical ring；
Fig. 6 is presentation schematic diagram of the auxiliary focusing helical ring in camera fields of view；
Fig. 7 is the operation principle schematic diagram of auxiliary focusing cylinder in the present invention；
Fig. 8 is the principle schematic after present preview image is identified in the embodiment of the present invention two；
Fig. 9 is the schematic diagram that focus determination is carried out by control module of focusing；
Figure 10 is after current picture amplifies, and focus point is beyond the situation schematic diagram outside the visual field.
Specific implementation mode
Embodiment one
According to Fig. 1, the auxiliary focusing cylinder in the present invention, includes the cylinder 1 of both ends open and internal run-through, cylinder 1
Front opening for connecting imaging len 99, the tail end of cylinder 1 is open for passing through for light.
As shown in figure 3, the horn-like of head end amplification is shunk in inner cavity of the cylinder 1 between its both ends open in tail end.Such as
Shown in Fig. 2, auxiliary focusing helical ring 2 is connected in the cavity wall of inner cavity.
As shown in Figure 4, Figure 5, auxiliary focusing helical ring 2 is spliced to form with helical stand scalariform by several section convex block 2-1, convex
The end of block 2-1 extends internally along the radial level of cylinder 1.As shown in fig. 6, often section convex block 2-1 at it towards 1 tail end side of cylinder
To top surface at be provided with auxiliary focusing texture 2-2.Auxiliary focusing texture 2-2 may insure focusing ring at the sharp keen of image
Degree, convenient for the identifying processing of the accurate judgement and image border of focusing in auto-focusing.It can wherein be used as preferably：
Auxiliary focusing helical ring 2 is individual pen formula, and so-called individual pen formula i.e. its starting point end and destination terminal does not have overlay segment on projecting direction, into
A notch will can be artificially arranged in one step between starting point end and destination terminal.
In addition, for drop bottom production difficulty, can be used as preferably：As shown in Figure 4, Figure 5, further include fixed frame 3, it is fixed
The outer wall shape of frame 3 is mutually fitted with cavity wall shape, and several convex block 2-1 for saving the helically step-like splicing of formula are connected in fixed frame 3
On wall, fixed frame 3 is for intercalation in the inner cavity of cylinder 1.
After the individually producing of fixed frame 3, further it is convenient for 3 accessory of fixed frame that will have been produced from the front end of cylinder 1
Assembly is entered in opening, and coordinates the realization of aforementioned one notch of artificial setting, can be used as preferably：Fixed frame 3 is by C
Shape root edge 3-1, C-shaped apical margin 3-2 and the support plate 3-3 being connected between C-shaped root edge 3-1, C-shaped apical margin 3-2 are constituted, C-shaped root edge
3-1, C-shaped apical margin 3-2 and support plate 3-3 are all made of elastic material and are made.The power for making it be closed first is applied to fixed frame 3 when assembly
To reduce its diameter, then plugged into from 1 front opening of cylinder.Fixed frame 3 is from 1 front opening of cylinder in order to prevent
It is sliding out and, the flange for forming blocking limit to C-shaped root edge 3-1 of an annular can also be additionally provided at cavity wall front end.
It, can be in cylinder in order to reduce the light random reflected of cylinder inboard wall and convenient for connecting imaging len 99 and filming apparatus
There is internal thread with threaded in tail end opening in the front opening of body 1.
As shown in Figure 6 and Figure 7, the auxiliary focusing cylinder in the present embodiment passes through auxiliary connecting device and filming apparatus (such as hand
Machine, naturally it is also possible to be it is other miniaturization ground on an equal basis with shooting function device, such as GOPRO moving cameras) connection after, clap
The CCD camera assembly CAM for taking the photograph device is located in the open rearward end of cylinder 1 or corresponding thereto.As shown in fig. 6, in the reality of filming apparatus
When find a view on screen it can be seen that complete auxiliary focusing helical ring 2 and the object image in auxiliary focusing helical ring 2.It is logical
Cross tentatively by focus point X be selected as on auxiliary focusing helical ring 2 some convex block (convex block of left upper in such as Fig. 6) appropriate with
Fixed lens position makes it no longer move, since convex block 2-1 is constant and have the auxiliary that can clearly identify thereon at a distance from CAM
Focus texture 2-2, so can quickly focus.User is moved forward and backward by hand-held between auxiliary focusing cylinder and object A again
Distance and effort so that object is located at same blur-free imaging of capableing of in 99 other side imaging A ' of imaging len and convex block 2-1
In plane X (camera lens has arrived the optimum position of the opposite plane after the adjustment), the picture A ' of object A can be clear by photosensitive element at this time
Imaging, and shooting button is pressed to obtain the picture file of shape library at this.
Due to by " pre-focusing " to convex block 2-1, camera lens being moved to suitable position and fixation, therefore work as and finely tuning
Bat can be pressed in due course once finding the moment for capableing of blur-free imaging during distance between this auxiliary focusing cylinder front end and object
It takes the photograph button and avoids slow focus operation and shake and let slip a golden opportunity, increase rate in blocks.
Embodiment two
The present embodiment be on the basis of embodiment one, for when user be intended to by way of directly inputting virtual focal length or
It is difficult to, directly by focus point X selections when on auxiliary focusing helical ring 2 on some convex block appropriate, improve making for auxiliary focusing cylinder
With convenience and practicability, and carry out further perfect.
The present embodiment is related to a kind of focusing assisted Selection system and a kind of focusing assisted selection method.
A kind of focusing assisted Selection system, including the auxiliary focusing cylinder in embodiment one further include that focus point selection is single
Member.
Focus point selecting unit is used for according to control parameter input by user, to the output of the focusing control module of mobile phone and institute
State the corresponding target focusing area centre coordinate on the auxiliary focusing helical ring of control parameter.
Focus point selecting unit includes specifically：
Auxiliary focusing helical ring identifies determining module, suitable for according to the current preview figure acquired by mobile phone cmos sensor
Picture, as shown in figure 8, (such as black and photographic subjects object, which have, to be determined using the pre-set color feature of auxiliary focusing helical ring
The color of contrast) it is positioned, and its center position coordinates (x is measured as unit of pixel0,y0), internal diameter riPixel, outer diameter ro
The mean value r of pixel, the inside and outside diameter is r=(ri+ro)/2, the start angle θ of auxiliary focusing helical ring and termination point-θ.
Virtual focal length user's input module is suitable for receiving the value of virtual focal length p input by user.
Focusing area computing module, suitable for calculating separately out the regional center angle Ф of target focusing area by following equation
With centre coordinate (xp,yp),
Φ=p (360 ° of -2 θ)+θ
xp=x0+r·sinΦ
yp=y0-r·cosΦ。
Focusing message output module, is suitable for the centre coordinate (x of target focusing areap,yp) information exports to pair of mobile phone
Burnt control module.As shown in figure 9, focusing control module realizes focusing control according to information is obtained to camera.
It can be used as preferably：The virtual focal length user input module has and always show in the touch of mobile phone
Slide block type value input mouth (not shown) on screen.
It is worth mentioning that：Often user gets used to selecting focus point in a manner of clicking directly on screen for some, but because
Limited for the size of mobile phone screen, as shown in Figure 10, therefore after screen-picture is amplified, auxiliary focusing helical ring tends not to
It is all shown, therefore user can not put and choose beyond auxiliary focusing spiral loop section other than screen.It at this time can be by always
The slide block type value input mouth being shown on the touch-screen of mobile phone, which can slide selection, will input virtual focal length, intuitively
Feel by sliding slider can (manual) focus.
The focusing assisted selection method that above system contains, includes the following steps：
According to the present preview image acquired by mobile phone cmos sensor, the pre-set color of auxiliary focusing helical ring is utilized
Feature positions it, and as unit of pixel, measures its center position coordinates (x0,y0), internal diameter riPixel, outer diameter roPixel, institute
It is r=(r to state inside and outside diameter mean value ri+ro)/2, the start angle θ of auxiliary focusing helical ring and termination point-θ.
Receive the value of virtual focal length p input by user.
The regional center angle Ф and centre coordinate (x of target focusing area are calculated separately out by following equationp,yp),
Φ=p (360 ° of -2 θ)+θ
xp=x0+r·sinΦ
yp=y0-r·cosΦ；
By the centre coordinate (x of target focusing areap,yp) information exports to the focusing control module of mobile phone.
The present invention's is not limited to the above embodiment, and the technical solution of above-mentioned each embodiment of the invention can be handed over each other
Fork combination form new technical solution, in addition it is all using equivalent replacement formed technical solution, all fall within the present invention claims guarantor
It protects in range.
Claims (9)
1. a kind of auxiliary focusing cylinder, it is characterised in that：It opens the front end of cylinder including both ends open and internal run-through, the cylinder
Mouth is open for connecting imaging len, the tail end of the cylinder for passing through for light；
The cylinder is located at horn-like, the cavity wall of the inner cavity that the inner cavity between its both ends open shrinks head end amplification in tail end
On be connected with auxiliary focusing helical ring；
The auxiliary focusing helical ring is spliced to form with helical stand scalariform by several section convex blocks, one end end edge of the convex block
The radial level of the cylinder extends internally.
2. auxiliary focusing cylinder according to claim 1, it is characterised in that：The convex block is often saved at it towards cylinder tail end direction
Top surface at be provided with auxiliary focusing texture.
3. auxiliary focusing cylinder according to claim 1, it is characterised in that：Further include fixed frame, the outer wall shape of the fixed frame
Shape is mutually fitted with the cavity wall shape, and several convex blocks for saving the helically step-like splicing of formula are connected on the fixed frame inner wall
, the fixed frame is for intercalation in the inner cavity of the cylinder.
4. auxiliary focusing cylinder according to claim 3, it is characterised in that：The fixed frame be by C-shaped root edge, C-shaped apical margin and
The support plate being connected between the C-shaped root edge, C-shaped apical margin is constituted, and the C-shaped root edge, C-shaped apical margin and support plate are all made of bullet
Property material is made；
The flange for forming blocking limit to the C-shaped root edge of an annular is additionally provided at the cavity wall front end.
5. auxiliary focusing cylinder according to claim 1, it is characterised in that：In the front opening of the cylinder and in tail end opening
It is threaded to have internal thread.
6. a kind of focusing assisted Selection system, it is characterised in that：Including auxiliary focusing cylinder and focus point selecting unit,
The auxiliary focusing cylinder includes
The cylinder of both ends open and internal run-through, the front opening of the cylinder is for connecting imaging len, the tail of the cylinder
End opening for light for passing through；
The cylinder is located at horn-like, the cavity wall of the inner cavity that the inner cavity between its both ends open shrinks head end amplification in tail end
On be connected with auxiliary focusing helical ring；
The auxiliary focusing helical ring is spliced to form with helical stand scalariform by several section convex blocks, one end end edge of the convex block
The radial level of the cylinder extends internally；
The focus point selecting unit
For according to control parameter input by user, being exported to the focusing control module of mobile phone corresponding with the control parameter
Target focusing area centre coordinate on the auxiliary focusing helical ring.
7. focusing assisted Selection system according to claim 6, it is characterised in that：The focus point selecting unit includes
Auxiliary focusing helical ring identifies determining module, suitable for according to the present preview image that is acquired by mobile phone cmos sensor,
It is positioned using the pre-set color feature of auxiliary focusing helical ring, and measures its center position coordinates (x as unit of pixel0,
y0), internal diameter riPixel, outer diameter roThe mean value r of pixel, the inside and outside diameter is r=(ri+roThe starting of)/2, auxiliary focusing helical ring
Angle, θ and termination point-θ；
Virtual focal length user's input module is suitable for receiving the value of virtual focal length p input by user；
Focusing area computing module, suitable for calculating separately out the regional center angle Ф of target focusing area by following equation in
Heart coordinate (xp,yp),
Φ=p (360 ° of -2 θ)+θ
xp=x0+r·sinΦ
yp=y0-r·cosΦ；
Focusing message output module, is suitable for the centre coordinate (x of target focusing areap,yp) information exports to the focusing control of mobile phone
Molding block.
8. focusing assisted Selection system according to claim 7, it is characterised in that：The virtual focal length user inputs mould
Block has and always show the slide block type value input mouth on the touch-screen of mobile phone.
9. a kind of focusing assisted selection method, including following characteristics step：
According to the present preview image acquired by mobile phone cmos sensor, the pre-set color feature of auxiliary focusing helical ring is utilized
It is positioned, and as unit of pixel, measures its center position coordinates (x0,y0), internal diameter riPixel, outer diameter roPixel, it is described
Inside and outside diameter mean value r is r=(ri+ro)/2, the start angle θ of auxiliary focusing helical ring and termination point-θ；
Receive the value of virtual focal length p input by user；
The regional center angle Ф and centre coordinate (x of target focusing area are calculated separately out by following equationp,yp), Φ=p
(360°-2θ)+θ
xp=x0+r·sinΦ
yp=y0-r·cosΦ；
By the centre coordinate (x of target focusing areap,yp) information exports to the focusing control module of mobile phone.
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| CN201810211166.6A CN108784646A (en) | 2018-03-14 | 2018-03-14 | A kind of auxiliary focusing cylinder and focusing assisted Selection system, method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810211166.6A CN108784646A (en) | 2018-03-14 | 2018-03-14 | A kind of auxiliary focusing cylinder and focusing assisted Selection system, method |
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| CN2777580Y (en) * | 2004-12-03 | 2006-05-03 | 伍国新 | Synchronous focusing device for digital telescope |
| US20070171366A1 (en) * | 2006-01-20 | 2007-07-26 | Clarity Medical Systems | Sequential wavefront sensor |
| CN201759546U (en) * | 2010-08-27 | 2011-03-16 | 中山联合光电科技有限公司 | Optical lens with high-resolution wide angle and capable of automatically focusing and retinal imaging |
| JP2012050622A (en) * | 2010-08-31 | 2012-03-15 | Canon Inc | Fundus photographing apparatus |
| CN103763477A (en) * | 2014-02-21 | 2014-04-30 | 上海果壳电子有限公司 | Double-camera after-shooting focusing imaging device and method |
| CN208958081U (en) * | 2018-03-14 | 2019-06-11 | 南京泰立瑞信息科技有限公司 | A kind of auxiliary focusing cylinder |
-
2018
- 2018-03-14 CN CN201810211166.6A patent/CN108784646A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2777580Y (en) * | 2004-12-03 | 2006-05-03 | 伍国新 | Synchronous focusing device for digital telescope |
| US20070171366A1 (en) * | 2006-01-20 | 2007-07-26 | Clarity Medical Systems | Sequential wavefront sensor |
| CN201759546U (en) * | 2010-08-27 | 2011-03-16 | 中山联合光电科技有限公司 | Optical lens with high-resolution wide angle and capable of automatically focusing and retinal imaging |
| JP2012050622A (en) * | 2010-08-31 | 2012-03-15 | Canon Inc | Fundus photographing apparatus |
| CN103763477A (en) * | 2014-02-21 | 2014-04-30 | 上海果壳电子有限公司 | Double-camera after-shooting focusing imaging device and method |
| CN208958081U (en) * | 2018-03-14 | 2019-06-11 | 南京泰立瑞信息科技有限公司 | A kind of auxiliary focusing cylinder |
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