Source: https://patents.google.com/patent/CN106164730B/en
Timestamp: 2020-03-30 01:53:24
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CN106164730B - The focus adjusting method of focus-regulating device, camera arrangement and photographic device - Google Patents
The focus adjusting method of focus-regulating device, camera arrangement and photographic device Download PDF
CN106164730B
CN106164730B CN201580018804.7A CN201580018804A CN106164730B CN 106164730 B CN106164730 B CN 106164730B CN 201580018804 A CN201580018804 A CN 201580018804A CN 106164730 B CN106164730 B CN 106164730B
photographing element
CN201580018804.7A
CN106164730A (en
功刀和正
伊藤一弥
菊地哲央
2014-04-10 Priority to JP2014081016A priority Critical patent/JP6438671B2/en
2014-04-10 Priority to JP2014-081016 priority
2015-02-23 Application filed by 奥林巴斯株式会社 filed Critical 奥林巴斯株式会社
2015-02-23 Priority to PCT/JP2015/054954 priority patent/WO2015156042A1/en
2016-11-23 Publication of CN106164730A publication Critical patent/CN106164730A/en
2019-04-09 Publication of CN106164730B publication Critical patent/CN106164730B/en
Even if providing in the case where the optical axis center at the picture center of photographing element and optical system deviates, the focus adjusting method of the focus-regulating device of defocus amount, camera arrangement and photographic device also can be accurately corrected.Photographing element is included, has output as the camera shooting pixel and focus detection pixel of signal；Vibration-proof section, it makes photographing element be moved upward to correction hand shaking in the side vertical with the optical axis of phtographic lens, and it exports and mobile relevant information, focus adjustment signal defocus_dat (#11) is generated according to the output for the multiple focus detections pixel for including in focus detection region, information (the Xs exported according to vibration-proof section, Ys) position (x, y) (#5) Lai Jiaozheng focal adjustments signal (S25) of (#9) and focus detection area.
The focus adjusting method of focus-regulating device, camera arrangement and photographic device
The present invention relates to focus-regulating device, photograph that the focal adjustments of phtographic lens are carried out according to focus detection result The focus adjusting method of machine system and photographic device.
Since main subject is not necessarily located the center of photographic picture, so multiple ranging regions are arranged, according to apart from each The focal adjustments of distance measurement result (defocusing direction and defocus amount) Lai Jinhang phtographic lens of ranging region.In this case, due to The aberration etc. of phtographic lens increases when distance is separate from optical axis center in the error for the defocus amount that each ranging region obtains Greatly.Therefore, it is proposed to by calculating the school for correcting defocus amount to the distance of each ranging region according to from optical axis center Positive quantity, and each defocus amount found out in each ranging region is corrected with the correcting value, calculate accurate defocus amount (referring to patent document 1).
Patent document 1: No. 3236799 bulletins of Japanese Patent
In recent years, it is known to equipped with make photographing element offset hand shaking side be moved upward to correction hand shaking vibrationproof machine The camera of structure.In the camera for being assembled with the vibration proof mechanism, according to from the optical axis center of photographing element to each ranging The distance in region finds out correcting value and corrects in the method for defocus amount, and when vibration proof mechanism is acted, it is accurate to calculate Defocus amount.
The point is illustrated using Fig. 7.In camera shown in Fig. 7, multiple surveys are configured on photographing element 21 Away from region 103, centered on the picture center 101 of photographing element 21, it is symmetrically configured with multiple ranging regions 103.In Fig. 7 institute In the example shown, ranging region 103 is respectively configured at 5, at the 1st row is configured with 3, in the 2nd row~the 4th row in the configuration of the 5th row There is the ranging region at 3.Photographing element 21 in order to prevent hand shaking and departure (Xs, Ys) is moved by vibration proof mechanism.Therefore, 101 movement deviation amount (Xs, Ys) of picture center, positioned at picture center ranging region 103a and be located at from optical axis center 101 from Ranging region 103b all movement deviation amounts (Xs, Ys) at the position of distance d are opened.
In this way, the case where hand shaking in order to prevent makes photographing element mobile mode (referred to as imager displacement mode) Under, optical axis center and the positional relationship at picture center shift, and the distance from optical axis center to ranging region changes. That is, distance d shown in Fig. 7 changes.Therefore, it is impossible to ensure the precision of the correcting value of defocus amount.
In addition, finding out the correcting value of defocus amount, institute only for the distance d away from picture center in previous bearing calibration Not account for replacement camera lens intrinsic state, such as position of zoom lens and the position of focus lens, therefore can not be high-precision Find out to degree the correcting value of defocus amount.
The present invention be exactly in light of this situation and complete, even if its purpose is to provide one kind photographing element picture In the case that the optical axis center of center and optical system deviates, the focal adjustments dress of defocus amount also can be accurately corrected It sets, the focus adjusting method of camera arrangement and photographic device.
The focus-regulating device of 1st invention of the invention includes photographing element, and there is reception to have passed through phtographic lens Light beam simultaneously carries out photoelectric conversion and exports the camera shooting pixel and focus detection pixel as signal；Vibration-proof section makes above-mentioned take the photograph Element is moved upward to correction hand shaking in the side vertical with the optical axis of above-mentioned phtographic lens, and exports and above-mentioned photographing element The relevant information of movement；Operational part calculates focal adjustments signal according to the output of above-mentioned focus detection pixel；Storage Portion, storage is according to the image height position of above-mentioned focus detection pixel to the above-mentioned corrected corrected value of focal adjustments signal； And correction unit, according to the output of above-mentioned storage unit, the information of above-mentioned vibration-proof section output and above-mentioned focus detection pixel Position, corrects above-mentioned focal adjustments signal, and above-mentioned corrected value is to indicate that the image planes amount of movement at above-mentioned image height position is taken the photograph with above-mentioned The information of the ratio between unit image planes amount of movement on the optical axis of shadow camera lens, above-mentioned correction unit according to above-mentioned focus detection pixel The corresponding above-mentioned corrected value of information relevant to the movement of above-mentioned photographing element that image height position, above-mentioned vibration-proof section export, correction Above-mentioned focal adjustments signal.
The camera arrangement of 2nd invention includes replacement camera lens, with photographic optical system；And camera body, The replacement camera lens can be assembled, wherein above-mentioned replacement camera lens has storage unit, and the storage unit is according to the imaging area of photographing element Image height position store corrected value relevant to focal adjustments, above-mentioned corrected value is output to above-mentioned camera body, it is above-mentioned Camera body includes photographing element, has and receives the light beam for having passed through above-mentioned photographic optical system and carry out photoelectric conversion And export the camera shooting pixel and focus detection pixel as signal；Operational part, according to the defeated of above-mentioned focus detection pixel Out, focal adjustments signal is calculated；Vibration-proof section makes above-mentioned photographing element in the side vertical with the optical axis of above-mentioned photographic optical system It is moved upward to correction hand shaking, and exports information relevant to the movement of above-mentioned photographing element；And correction unit, according to upper State the corrected value of storage unit output, above-mentioned and mobile relevant information and the above-mentioned focus detection pixel of the output of above-mentioned vibration-proof section Position, correct above-mentioned focal adjustments signal, above-mentioned corrected value be indicate image planes amount of movement at above-mentioned image height position with it is above-mentioned The information of the ratio between unit image planes amount of movement on the optical axis of phtographic lens, above-mentioned correction unit according to above-mentioned focus detection pixel Image height position, above-mentioned vibration-proof section output the corresponding above-mentioned corrected value of information relevant to the movement of above-mentioned photographing element, school Just above-mentioned focal adjustments signal.
The camera arrangement of 3rd invention includes replacement camera lens, with photographic optical system；And camera body, The replacement camera lens can be assembled, wherein above-mentioned replacement camera lens includes storage unit, according to the picture of the imaging area of photographing element Above-mentioned corrected value is output to above-mentioned camera body to store corrected value relevant to focal adjustments by high position；And it is anti- Vibration portion makes a part of above-mentioned photographic optical system be moved upward to correction hand shaking in the side vertical with optical axis, and exports Information relevant to the movement of above-mentioned photographing element, above-mentioned camera body include photographing element, have receive passed through on It states the light beam of photographic optical system and carries out photoelectric conversion and export the camera shooting pixel and focus detection pixel as signal；Fortune Calculation portion calculates focal adjustments signal according to the output of above-mentioned focus detection pixel；And correction unit, it is deposited according to above-mentioned The position of above-mentioned and mobile relevant information and above-mentioned focus detection pixel that the corrected value of storage portion output, above-mentioned vibration-proof section export It sets, corrects above-mentioned focal adjustments signal, above-mentioned corrected value is the image planes amount of movement and above-mentioned photography indicated at above-mentioned image height position The information of the ratio between unit image planes amount of movement on the optical axis of camera lens, above-mentioned correction unit is according to the picture with above-mentioned focus detection pixel High position, the output of above-mentioned vibration-proof section the corresponding above-mentioned corrected value of information relevant to the movement of above-mentioned photographing element, in correction State focal adjustments signal.
The focus adjusting method of the photographic device of 4th invention, the photographic device include photographing element, have to receive and lead to It has crossed the light beam of phtographic lens and has carried out photoelectric conversion and export the camera shooting pixel and focus detection pixel as signal；And Vibration-proof section makes above-mentioned photographing element be moved upward to correction hand shaking in the side vertical with the optical axis of above-mentioned phtographic lens, and Export information relevant to the movement of above-mentioned photographing element, wherein the focus adjusting method of the photographic device comprises the steps of: Focus detection area is set to above-mentioned photographing element；The multiple focus detection pixels for being included according to above-mentioned focus detection area Output, generate focal adjustments signal；And the position of the information and above-mentioned focus detection area exported according to above-mentioned vibration-proof section, Above-mentioned focal adjustments signal is corrected, above-mentioned corrected value is the image planes amount of movement and above-mentioned phtographic lens indicated at above-mentioned image height position Optical axis on the ratio between unit image planes amount of movement information, according to the image height position, above-mentioned anti-with above-mentioned focus detection pixel The corresponding above-mentioned corrected value of information relevant to the movement of above-mentioned photographing element of vibration portion output corrects above-mentioned focal adjustments letter Number.
The focus adjusting method of the photographic device of 5th invention, the photographic device include photographing element, have to receive and lead to It has crossed the light beam of phtographic lens and has carried out photoelectric conversion and export the camera shooting pixel and focus detection pixel as signal；And Vibration-proof section, the camera lens part for making above-mentioned pick-up lens be included are moved upward in the side vertical with the optical axis of above-mentioned phtographic lens Hand shaking is corrected, and exports information relevant to the movement of above-mentioned photographing element, wherein the focus adjusting method of the photographic device It has follow steps: focus detection area is set to above-mentioned photographing element；According to above-mentioned focus detection area included it is multiple The output of focus detection pixel generates focal adjustments signal；And the information and above-mentioned focus exported according to above-mentioned vibration-proof section The position of detection zone, corrects above-mentioned focal adjustments signal, and above-mentioned corrected value is to indicate that the image planes at above-mentioned image height position are mobile The information of amount and the ratio between unit image planes amount of movement on the optical axis of above-mentioned phtographic lens, according to above-mentioned focus detection pixel The corresponding above-mentioned corrected value of information relevant to the movement of above-mentioned photographing element that image height position, above-mentioned vibration-proof section export, correction Above-mentioned focal adjustments signal.
Even if in accordance with the invention it is possible to provide the optical axis center hair at a kind of the picture center in photographing element and optical system In the case where raw deviation, the focus-regulating device, camera arrangement and photographic device of defocus amount also can be accurately corrected Focus adjusting method.
Fig. 1 is the block diagram for showing the essential electrical structure of camera of the 1st embodiment of the invention.
Fig. 2 is the flow chart for showing the movement of camera of the 1st embodiment of the invention.
Fig. 3 is the process for showing the movement of the correction of the ranging operation result of camera of the 1st embodiment of the invention Figure.
Fig. 4 is to correct the figure of sensitivity approximate function in the camera for illustrate the 1st embodiment of the invention.
Fig. 5 is the block diagram for showing the essential electrical structure of camera of the 2nd embodiment of the invention.
Fig. 6 is the process for showing the movement of the correction of the ranging operation result of camera of the 2nd embodiment of the invention Figure.
Fig. 7 is illustrated in the camera using previous imager displacement mode, and picture center and optical axis center occur partially From situation figure.
Digital camera of the invention (hereinafter, being simply denoted as camera) is applied to preferred hereinafter, using according to attached drawing Embodiment is illustrated.Fig. 1 is the block diagram for showing the essential electrical structure of camera of the 1st embodiment of the invention.This The camera of embodiment is made of replacement lens barrel 10 with the camera body 20 that can be assemblied in the replacement camera lens 10.? In present embodiment, fission constitutes replacement lens barrel 10 and camera body 20, but can certainly be as general pocket Camera is integrally formed like that.
Phtographic lens 11 is configured in replacement lens barrel 10.Phtographic lens 11 includes focus lens 11a and varifocal mirror Head 11b (in the case where being referred to as to these camera lenses, referred to as phtographic lens 11), by the optical image for being used to form subject S Multiple optical lens constitute.Focus lens 11a is the camera lens for carrying out focal adjustments, zoom lens 11b be for changing The camera lens of focal length, two camera lenses can move in the direction of the optical axis.
In addition, being provided with actuator 12 and lens control portion 13 in replacement lens barrel 10.Lens control portion 13 includes CPU etc., according to the control signal of the program stored in storage unit 14 and the AF operational part 23 in camera body 20 Carry out the control of replacement lens barrel 10.It is dissipated for example, lens control portion 13 is received from the AF operational part 23 in camera body 20 Jiao Liang, and carry out according to these information the control of actuator 12.Actuator 12 has multiple actuators, and phtographic lens 11 is made to exist It is moved on optical axis direction, carries out focal adjustments and power zoom (power zoom).In addition, detection focus lens 11a and zoom The testing result is sent AF operational part 23 by the position of camera lens 11b.
In addition, being provided with storage unit 14 in replacement lens barrel 10.The storage unit 14 is non-volatile with that electric can rewrite Property memory, be stored with for control replacement lens barrel 10 program, above-mentioned lens control portion 13 is controlled according to the program It replaces inside lens barrel 10.In addition, the various adjusted values etc. of 14 memory change lens barrel 10 of storage unit.In addition, storage unit 14 storages are according to the image height position of focus detection pixel come the corrected corrected value of focus point adjustment signal.In addition, this is deposited Storage portion 14 stores corrected value relevant to the aberration of phtographic lens 11 according to image height position.Storage unit 14 stores and makes varifocal mirror The corresponding corrected value of focal length for the phtographic lens 11 that head 11b is mobile and can be changed.The storage of storage unit 14 and focal adjustments camera lens (example Such as, focus lens 11a) the corresponding corrected value in position.Adjusted value and correction are stored in storage unit 14 in factory shipment etc. Value etc..Via lens control portion 13, the AF operational part 23 these adjusted values and corrected value etc. being output in camera body 20.
It is provided with photographing element 21, image processing part 22, AF operational part 23, record portion 24 in camera body 20 and prevents Vibration portion 25.
Photographing element 21 is on the optical axis of phtographic lens 11 and is configured near the imaging position of shot object image.Camera shooting Element 21 has multiple pixels, and multiple pixel has the photoelectric conversion part that shot object image (optical image) is converted to electric signal. Multiple pixels include: being configured to limit the focus detection pixel (also referred to " phase of the incident direction for the light beam for being incident on pixel Difference detection pixel ")；And it is configured to be incident on the unrestricted camera shooting use of light beam of pixel compared to focus detection pixel Pixel, multiple pixels two-dimensionally arrange.Focus detection pixel configuration is in ranging region 103 (referring to Fig. 7).
Photographing element 21 will be output to image processing part from focus detection pixel and camera shooting with the pixel value that pixel exports 22 and AF operational part 23.The pixel value from camera shooting pixel in 22 input pixel value of image processing part is carried out for real-time It finds a view the image procossing of display image and record image.In addition, image processing part 22 will be handled as recording picture number According to being output to record portion 24.Record portion 24 have assembled in main body 20 freely can electricity rewrite nonvolatile memory, it is defeated Enter and records recording image data.Photographing element 21 is as the light beam for passing through phtographic lens with reception and carries out photoelectricity turn It changes and exports as the camera shooting pixel of signal and the photographing element of focus detection pixel play a role.
AF operational part 23 has a control units such as CPU, the pixel value from focus detection pixel in input pixel value, and Carry out the AF operation based on phase difference detection method.In AF operation, according to from the centre coordinate position that image processing part 22 obtains It sets to set multiple ranging regions corresponding with the position of focus detection pixel, the ranging region of the setting is calculated dissipate respectively Jiao Liang.Also, it determines the priority of set ranging region, and differentiates the reliability of the defocus amount of ranging region, according to Priority and reliability, ranging region of the selection for the focal adjustments of phtographic lens 11 from multiple ranging regions.It will be It is calculated in AF operational part 23 to defocus direction and defocus amount is output to lens control portion 13 in replacement lens barrel 10, camera lens Control unit 13 carries out focal adjustments according to direction and defocus amount is defocused.AF operational part 23 is as according to focus detection pixel Output functions to calculate the operational part of focal adjustments signal.
Vibration-proof section 25 has photographing element shift mechanism, which, which has, has used detection due to hand shaking Etc. the shaking detection portion of the angular-rate sensor for the movement for being applied to camera body 20 or acceleration transducer etc., and according to this The detection signal in shaking detection portion, moves photographing element 21 in a manner of offsetting the movements such as hand shaking in the face vertical with optical axis It is dynamic.In addition, the information relevant to movement for being output to photographing element shift mechanism is also output to AF operational part 23 by vibration-proof section 25. Vibration-proof section 25 as make photographing element the side vertical with the optical axis of phtographic lens be moved upward to correction hand shaking, and export with The vibration-proof section of mobile relevant information plays a role.
Above-mentioned AF operational part 23 using the corrected value exported from the storage unit 14 in replacement lens barrel 10, from vibration-proof section 25 Output for carrying out the information relevant to the movement of photographing element 21 of hand shake correction and being selected as the position of ranging region, Come the pixel value to focus detection pixel of the basis from photographing element 21, calculated defocus amount is corrected.That is, In the case that vibration-proof section 25 makes photographing element 21 mobile (displacement) in order to carry out hand shake correction, AF operational part 23 considers the shifting It measures to carry out the correction of defocus amount in position.AF operational part 23 as the information exported according to the output of storage unit 14, vibration-proof section 25 and The position of focus detection pixel plays a role to correct the correction unit of focal adjustments signal.Later will use Fig. 2 step S7 and Fig. 3 describes the correction.
Then, using Fig. 2 and flow chart shown in Fig. 3, illustrate the movement in present embodiment.It is main in the flow chart The movement of focal adjustments relationship is shown.AF operational part 23 as CPU such as executing the movement according to program.
Coke is being indicated and powering on to camera body 20 and release button (not shown) is carried out and being operated etc. After point adjusting movement, process shown in Fig. 2 starts to act.Firstly, carrying out AF survey light/exposure (S1).In this step, it images Element 21 must expose for carrying out focus detection with pixel using the focus detection in photographing element 21.Carrying out the AF use When surveying light/exposure, as using Fig. 7 explanation, multiple ranging regions 103 are set in photographing element 21, for each survey Away from region 103, phase difference detection is carried out with the pixel value that pixel exports according to multiple focus detections.
After carrying out AF survey light/exposure, then the reading of AF pixel (S3) is carried out.In this step, in the exposure of step S1 After light, pixel value is read from focus detection pixel, to 23 output pixel value of AF operational part.
After carrying out the reading of AF pixel, then ranging operation (S5) is carried out.In this step, AF operational part 23 is according in step The pixel value from focus detection pixel read in rapid S3 calculates focal adjustments signal by so-called phase difference detection method (defocusing direction and defocus amount).In the operation of focal adjustments signal, in the case where having manually set ranging region, selection comes It from the pixel value of the focus detection pixel in the ranging region (focus detection area) manually set, and is certainly in ranging region It is scattered to find out according to the pixel value of the pixel of the focus detection from each ranging region and camera shooting pixel in the case where dynamic setting Jiao Liang, contrast value and face detection result etc. set ranging region (focus detection area) according to these.In step s 5 After ranging region has been determined, focal adjustments letter is generated according to the output for the multiple focus detections pixel for including in ranging region Number.
After carrying out ranging operation, the correction (S7) of ranging operation result is then carried out.In this step, by vibration-proof section In the case that 25 have carried out the hand shake correction shifted based on imager, letter relevant to the movement of photographing element 21 at this moment is used Breath and the corrected value corresponding with the position of ranging region exported from storage unit 14, the correction of Lai Jinhang focal adjustments signal.It Fig. 3 will be used to describe the detailed movement in step S7 afterwards.
After the correction for carrying out ranging operation result, focusing (S9) is then determined whether.In this step, determine in step Whether ranging operation result, that is, defocus amount after correcting in S7 falls into defined focusing range.That is, if defocus amount is regulation Value is hereinafter, be then judged to focusing.
Judgement result in step s 9 is in the case where not focusing, to carry out focus lens driving (S11).In the step In, AF operational part 23 will be sent to replacement lens barrel 10 as the focal adjustments signal of ranging operation result (including defocus amount) Interior lens control portion 13, lens control portion 13 are moved to focus lens 11a based on focal adjustments signal by actuator 12 Position.
Judgement result after having carried out focus lens driving in step s 11, or in step s 9 is the feelings that do not focus Under condition, terminate process shown in Fig. 2.
Then, using Fig. 3, the correction of the ranging operation result in the step S7 of explanatory diagram 2.In the process, firstly, into The interpolation (S21) of row sensitivity FR_M and FR_S.Sensitivity indicates the image planes amount of movement and photographic mirror on defined image height position The ratio of unit image planes amount of movement on the optical axis of head, is a form for correcting the corrected value of defocus amount.Wherein, FR_M is The sensitivity of meridian plane, FR_S are the sensitivity of sagittal.That is, for calculated defocus amount in step s 5 to be carried out and is taken the photograph The corrected value of the corresponding correction of the optical aberration of shadow camera lens 11 is sensitivity FR_M and FR_S.
Sensitivity FR_M and FR_S is stored in the storage unit in replacement lens barrel 10 as sensitivity table #7 (referring to Fig. 3) In 14.The representative point Obj of the sensitivity FR_M and sensitivity FR_S and focus lens position that are stored in sensitivity table #7, become The representative point Zn, ranging region of burnt position distance (X-direction) x apart from optical axis center, ranging region apart from optical axis center away from It is accordingly stored in the form of a table from (Y-direction) y.The position of representative the point Obj and focus lens 11a of focus lens position Corresponding, the representative point Zn of zoom position is corresponding with the position of zoom lens 11b, the central point of distance x, y and each ranging region Coordinate (x, y) it is corresponding.Sensitivity changes according to the optical aberration of phtographic lens 11, and the sensitivity is according to photography The position of focus lens 11a and zoom lens 11b in camera lens 11 and the position of the ranging region on 21 face of photographing element It sets and changes.As the sensitivity table #7 being stored in storage unit 14, taken into account according to memory capacity, with representativeness Value accordingly stored sensitivity FR_M, FR_S.
In the step s 21, the interpolation arithmetic of sensitivity FR_M, FR_S is carried out.That is, input focus lens position dst (#1), Zoom position zm (#3), image height (x, y) (#5) pass through interpolation using these values and the typical value being stored in sensitivity table #7 Operation accurately finds out sensitivity FR_M=F (dst, zm, x), FR_S=(dst, zm, y).Wherein, focus lens position Dst (#1) and zoom position zm (#3) are detected by the lens control portion 13 in replacement lens barrel 10, and the testing result is sent out It is sent in AF operational part 23.In addition, as image height (x, y) (#5), when ranging operation in step s 5, from multiple ranging regions The middle ranging region selected for generating focal adjustments signal uses the centre coordinate (x, y) of the ranging region selected.
Using Fig. 4, the interpolation arithmetic of sensitivity FR_M, FR_S of step S21 is illustrated.In Fig. 4 (a), x-axis is Zoom lens positions, y-axis are focus lens positions, and z-axis indicates sensitivity FR_M, FR_S corresponding with these positions.Institute as above It states, is not only stored with sensitivity corresponding with representative point in sensitivity table #7, in the example shown in Fig. 4 (a), will also And it is the corresponding sensitivity D1 of LD (i), ZM (k), sensitivity D2 corresponding with LD (i+1), ZM (k), corresponding with LD (i), ZM (k+1) Sensitivity D3 and sensitivity D4 corresponding with LD (i+1), ZM (k+1) as sensitivity FR_M, FR_S be stored in sensitivity table # In 7.
Since there is no sensitivity directly corresponding with focus lens position dst shown in Fig. 4 (a) and zoom position zm FR_M, FR_S, so being found out by interpolation.Firstly, calculating sensitivity H11 by carrying out interpolation to sensitivity D1, D2, and lead to It crosses and interpolation is carried out to sensitivity D3, D4 to calculate sensitivity H21.Then, by being carried out to sensitivity H11, H21 being calculated Interpolation calculates sensitivity H31.Sensitivity H31 is sensitivity corresponding with focus lens position dst and zoom position zm.
After finding out sensitivity corresponding with focus lens position dst and zoom position zm, it is further converted into and considers The sensitivity of image height (x, y).In Fig. 4 (b), horizontal axis capture is high (X-direction), and the longitudinal axis takes sensitivity FR_M.In addition, due to horizontal axis Capture height (Y-direction), the longitudinal axis take the curve graph of sensitivity FR_S identical as Fig. 4 (b), so omitting.
Although in the example shown in Fig. 4 (a), being found out by carrying out interpolation to sensitivity H31, Fig. 4 (a) is picture The case where high x [j].Be stored with table corresponding with image height x [j+1] in the sensitivity table #7 of storage unit 14, by with Fig. 4 (a) Identical interpolation processing calculates the sensitivity H32 in the case where image height x [j+1].Using according to image height x [j] and sensitivity H31 Determining point and the point determined according to image height [j+1] and sensitivity H32, are calculated belonging to ranging region by interpolation processing Sensitivity H4 at image height x.Sensitivity H4 is calculated sensitivity FR_M in the step s 21.Furthermore same, use image height Y [j], image height y [j+1] and its sensitivity, the sensitivity at image height y belonging to ranging region is calculated by interpolation processing, should Sensitivity is calculated sensitivity FR_S in the step s 21.
After calculating sensitivity FR_M, FR_S by interpolation in the step s 21, then sensitivity operation (S23) is carried out. In this step, the amount of movement (also referred to imager shift amount) from the input of vibration-proof section 25 for the photographing element 21 of hand shake correction (Xs, Ys) finds out sensitivity FR_M, FR_S for considering the amount of movement of photographing element 21 by interpolation processing.That is, due to Calculated sensitivity FR_M, FR_S is the sensitivity at the image height (x, y) determined by ranging region in step S21, so In the method illustrated using Fig. 4 (b), calculated by interpolation processing after moving image shift amount (Xs, Ys) from image height (x, y) Image height (x+Xs, y+Ys) at sensitivity.
After calculating sensitivity FR_M, FR_S for considering imager shift amount (Xs, Ys) by interpolation processing, benefit Final sensitivity is calculated with following (1) formulas.
[{ (x+Xs) × FR_S }+{ (y+Ys) × FR_M }]/(x+y+Xs+Ys) ... (1) FR=
After carrying out sensitivity operation in step S23, the defocus amount (S25) for considering sensitivity is then calculated.In the step In rapid, by that calculated defocus amount (defocus_dat) #11 will fall into a trap divided by step S23 in step S5 (referring to Fig. 2) The sensitivity FR of calculating is calculated.That is, calculating defocus amount using following (2) formulas.
Defocus_dat=defocus_dat/FR ... (2)
Using above-mentioned (2) formula, calculated defocus amount defocus_dat is in addition to focus lens position dst, zoom position Other than zm, image height (x, y), it is also contemplated that imager shift amount (Xs, Ys).Therefore, even if for preventing the vibrationproof machine of hand shaking In the case that movement has occurred in structure, it can also remove the influence of the optical aberration of phtographic lens 11 and carry out high-precision focus tune Section.
After calculating defocus amount in step s 25, terminate the subprogram of the correction of ranging operation result, returns to Fig. 2 institute The main flow shown.
As described above like that, in the 1st embodiment of the invention, comprising: vibration-proof section 25 makes photographing element 21 It is moved upward to correction hand shaking in the side vertical with the optical axis of phtographic lens 11, and is exported and mobile relevant information (imaging Device shift amount)；And AF operational part 23, focus tune is calculated according to the output of the pixel of the focus detection in photographing element 21 It saves signal (defocus amount etc.), using information relevant to movement (imager shift amount) Lai Jiaozheng focal adjustments signal (referring to Fig. 3 S23).Therefore, even if also can in the case where the optical axis center at the picture center of photographing element and optical system deviates It is enough accurately to correct defocus amount.
In addition, in the present embodiment, the influence of the position (x, y) on photographing element 21 is considered in the step s 21, in step The influence of the position (Xs, Ys) shifted based on imager is considered in rapid S23.That is, being divided into the influence for eliminating position twice.But It is, since the two is all used to remove the influence of the position on photographing element 21, so the influence of position can also be removed once. That is, when carrying out the interpolation processing of FR_M, FR_S in step S21, may include image height (x, y) and imager shift amount (Xs, Ys) interpolation processing is carried out inside.
Although in addition, by defocus amount divided by sensitivity FR, can be in (2) formula of above-mentioned calculating defocus amount According to the generating mode of sensitivity FR (corrected value), by defocus amount multiplied by other functional expressions of sensitivity FR etc..
Then, using Fig. 5, illustrate the 2nd embodiment of the invention.In the 1st embodiment, in camera body 20 Setting vibration-proof section 25 makes photographing element 21 in the face vertical with the optical axis of phtographic lens 11 in a manner of the movement for offsetting hand shaking Interior movement.In contrast, in the 2nd embodiment, vibration-proof section 15 is set in replacement lens barrel 10, to offset the fortune of hand shaking Dynamic mode moves the vibrationproof in phtographic lens 11 in the face vertical with optical axis with camera lens 11c.
Using Fig. 5, illustrate the structure of present embodiment.Part identical with the 1st embodiment is omitted the description, with difference It is illustrated centered on point.In the present embodiment, the vibration-proof section 25 being not provided in camera body 20, replaces, more It changes and vibration-proof section 15 is set in lens barrel 10.In addition, configuration is anti-in one of the phtographic lens 11 in replacement lens barrel 10 Vibration camera lens 11c.Vibrationproof can be moved with camera lens 11c in the face vertical with the optical axis of phtographic lens 11.When vibrationproof camera lens When 11c is moved in the face vertical with optical axis, optical axis center is also moved.
Vibration-proof section 15 has vibrationproof lens shift mechanism, which, which has, has used angular speed biography The shaking detection portion of sensor or acceleration transducer etc., and according to the detection signal in the shaking detection portion, make vibrationproof camera lens 11c It is mobile in a manner of offsetting the movement of hand shaking etc. in the face vertical with the optical axis of phtographic lens 11, the angular-rate sensor or add The detection such as velocity sensor is applied to camera body 20 due to hand shaking etc. and replaces the movement of lens barrel 10.In addition, anti- The information relevant to movement for being output to vibrationproof lens shift mechanism is output to AF fortune via lens control portion 13 by vibration portion 15 Calculation portion 23.Vibration-proof section 15 as make a part of phtographic lens the side vertical with optical axis be moved upward to correction hand shaking, and It exports and plays a role to the vibration-proof section of mobile relevant information.
The case where movement in present embodiment is with 1 embodiment is identical, along Fig. 2 and process shown in fig. 6 come into The correction of row distance measurement result, is illustrated centered on difference.Fig. 6 is compared with process shown in Fig. 3, and point as shown below is not Together.
In present embodiment shown in Fig. 6, AF operational part 23 is substituted in the 1st embodiment shown in Fig. 3 from photograph The imager shift amount #9 that vibration-proof section 25 in owner's body 20 exports, and input defeated from the vibration-proof section 15 in replacement lens barrel 10 Amount of movement (also including moving direction) i.e. optical axis shift amount (Xa, Ya) #9A of the optical axis of antivibration lens 11c out.Also, in step In rapid S22, optical axis shift amount (Xa, Ya) is converted to the amount of movement i.e. image shift amount of the picture on photographing element 21 by AF operational part 23 (Xi, Yi).The change type that the optical axis shift amount of antivibration lens 11c is converted to the image shift amount on photographing element 21 is stored in It replaces in the storage unit 14 in camera lens 10.AF operational part 23 receives above-mentioned change type from lens control portion 13 and is stored.This Outside, change type is changed according to the information of the variation of focus lens position dst, zoom lens positions zm.
In addition, above-mentioned change type is sent AF operational part 23 by lens control portion 13, but lens control portion 13 can root According to above-mentioned change type, optical axis shift amount (Xa, Ya) is converted into image shift amount, sends AF operation for calculated image shift amount Portion 23.At this moment, change type is corrected according to optical conditions such as focus lens position dst, zoom lens positions zm.In the situation Under, since the data volume for being sent to AF operational part 23 from lens control portion 13 becomes less, so the time lag of communication can be shortened. In addition, when optical axis shift amount is converted to image shift amount, it is sometimes desirable to relevant to camera body 20 information (such as optical path Length etc.).In this case, information relevant to camera body 20, AF are sent from AF operational part 23 to lens control portion 13 Operational part 23 reflects the information to calculate image shift amount.
Then, sensitivity operation (S23A) is carried out.In this step, according to based on being exported from vibration-proof section 15 due to hand shaking Optical axis shift amount and the image shift amount (Xi, Yi) on calculated photographing element 21 caused by correcting, are asked by interpolation processing Sensitivity FR_M, FR_S of image shift amount is considered out.That is, since calculated sensitivity FR_M, FR_S in the step s 21 is The sensitivity at image height (x, y) determined by ranging region, so in the method illustrated using Fig. 4 (b), at interpolation Manage calculate from image height (x, y) move image shift amount (Xi, Yi) after image height (x+Xi, y+Yi) at sensitivity.
After calculating sensitivity FR_M, FR_S for considering image shift amount (Xi, Yi) by interpolation processing, under utilization It states (3) formula and calculates final sensitivity.
[{ (x+Xi) × FR_S }+{ (y+Yi) × FR_M }]/(x+y+Xi+Yi) ... (3) FR=
In addition, the deviation side of the imager shift amount of the 1st embodiment and the image shift amount of the 2nd embodiment about image height position To symbol in the same direction on the contrary, so considering the difference in (3) formula.The flow chart phase of other movements and Fig. 2 and Fig. 3 Together.
In this way, the 2nd embodiment of the invention includes vibration-proof section 15, make a part (vibrationproof camera lens of phtographic lens It 11c) is moved upward to correction hand shaking in the side vertical with optical axis, and is exported and mobile relevant information；And AF operational part 23, it is calculated focal adjustments signal (defocus amount etc.), is used according to the output of the pixel of the focus detection in photographing element 21 Information relevant to movement come correct focal adjustments signal (referring to Fig. 6 S23A).Therefore, even if in the picture of photographing element In the case that the heart and the optical axis center of optical system deviate, defocus amount also can be accurately corrected.
As described above, each embodiment of the invention includes photographing element 21, and there is reception to pass through The light beam of phtographic lens 11 simultaneously carries out photoelectric conversion and exports the camera shooting pixel and focus detection pixel of picture signal；Vibrationproof Portion 25,15 corrects hand shaking, and exports and mobile relevant information；AF operational part 23, according to focus detection pixel Output is to calculate focal adjustments signal；Storage unit 14, storage are adjusted according to the image height position focus point of focus detection pixel The corrected corrected value of signal；And correction unit (AF operational part 23), according to the output of storage unit 14, vibration-proof section 25,15 The position of the information of output and focus detection pixel corrects focal adjustments signal.In this way, making to take the photograph using in order to correct hand shaking The information relevant to movement of element 21 or vibrationproof with camera lens 11c when mobile, Lai Jiaozheng focal adjustments signal.Therefore, i.e., Make also can accurately correct in the case where the optical axis center at the picture center of photographing element and optical system deviates Defocus amount.
In addition, though in various embodiments of the present invention, storing the corrected corrected value of focus point adjustment signal Storage unit setting in replacement lens barrel 10, but the case where lens barrel and camera body are integrally constituted etc. Under, naturally it is also possible to it is arranged in camera body.
In addition, in various embodiments of the present invention, as the equipment for photography, being carried out using digital camera Illustrate, but as camera, can be digital single-lens reflex camera and Portable digital camera, is also possible to video camera, photography The camera of dynamic image as machine, and can of course be built in mobile phone, smart phone, portable information terminal PDA (Personal igital ssist: personal digital assistant), personal computer (PC), tablet-type personal computer, game Camera in equipment etc..
In addition, about be recorded in the recording medium, the recording method in record portion, can be remembered in product export Record, also can use the recording medium of publication, can also be downloaded via internet.About be recorded in the recording medium, note Recording method in record portion can be recorded in product export, also can use the recording medium of publication, can also be via Internet is downloaded.
In addition, for convenience, using " first ", " then " about the motion flow in claim, the description and the appended drawings The language of equal performances sequence is illustrated, but in the place not being illustrated especially, do not refer to carry out in the order Implement.
The present invention is not limited to the respective embodiments described above as former state, can be within the scope of its spirit in implementation phase Structural element is deformed and is embodied.Furthermore it is possible to pass through the appropriate of multiple structural elements disclosed in above embodiment Combination forms various inventions.For example, several structural elements in entire infrastructure element shown in embodiment can be deleted.And And it can be with the structural element of appropriately combined different embodiments.
10: replacement lens barrel；11: phtographic lens；11a: focus lens；11b: zoom lens；11c: vibrationproof camera lens； 12: actuator；13: lens control portion；14: storage unit；15: vibration-proof section；20: camera body；21: photographing element；22: image Processing unit；23:AF operational part；24: record portion；25: vibration-proof section；100: photographing element；101: picture center；103: distance measurement zone Domain.
1. a kind of focus-regulating device comprising:
Photographing element is exported with receiving the light beam for passing through phtographic lens and carrying out photoelectric conversion as the camera shooting of signal is used Pixel and focus detection pixel；
Vibration-proof section makes above-mentioned photographing element be moved upward to correction hand shaking in the side vertical with the optical axis of above-mentioned phtographic lens, And export information relevant to the movement of above-mentioned photographing element；
Operational part calculates focal adjustments signal according to the output of above-mentioned focus detection pixel；
Storage unit stores corrected to above-mentioned focal adjustments signal according to the image height position of above-mentioned focus detection pixel Corrected value；And
Correction unit, the information exported according to the output of above-mentioned storage unit, above-mentioned vibration-proof section and above-mentioned focus detection pixel Position corrects above-mentioned focal adjustments signal,
Above-mentioned corrected value is the unit picture on the optical axis for indicate the image planes amount of movement and above-mentioned phtographic lens at above-mentioned image height position The information of the ratio between face amount of movement,
Above-mentioned correction unit exports first with above-mentioned camera shooting according to the image height position with above-mentioned focus detection pixel, above-mentioned vibration-proof section The corresponding above-mentioned corrected value of the relevant information of the movement of part, corrects above-mentioned focal adjustments signal.
2. focus-regulating device according to claim 1, which is characterized in that
Above-mentioned phtographic lens includes the camera lens that can be moved in the direction of the optical axis and can focus,
Above-mentioned storage unit stores corrected value corresponding with above-mentioned focal length.
3. focus-regulating device according to claim 1, which is characterized in that
Above-mentioned phtographic lens include can focal adjustments camera lens moving in the direction of the optical axis,
Above-mentioned storage unit stores corrected value corresponding with the position of above-mentioned focal adjustments camera lens.
4. a kind of camera arrangement includes replacement camera lens, with photographic optical system；And camera body, it can Assemble the replacement camera lens, which is characterized in that
Above-mentioned replacement camera lens has storage unit, which stores and coke according to the image height position of the imaging area of photographing element Point adjusts relevant corrected value, and above-mentioned corrected value is output to above-mentioned camera body,
Above-mentioned camera body includes
There is reception to pass through the light beam of above-mentioned photographic optical system and carry out photoelectric conversion and export as signal for photographing element Camera shooting pixel and focus detection pixel；
Vibration-proof section makes above-mentioned photographing element be moved upward to correction hand in the side vertical with the optical axis of above-mentioned photographic optical system It trembles, and exports information relevant to the movement of above-mentioned photographing element；And
Correction unit, according to the corrected value of above-mentioned storage unit output, the above-mentioned and mobile relevant information of above-mentioned vibration-proof section output With the position of above-mentioned focus detection pixel, above-mentioned focal adjustments signal is corrected,
Above-mentioned corrected value is the list on the optical axis for indicate the image planes amount of movement and above-mentioned photographic optical system at above-mentioned image height position The information of the ratio between position image planes amount of movement,
5. a kind of camera arrangement includes replacement camera lens, with photographic optical system；And camera body, it can Assemble the replacement camera lens, which is characterized in that
Above-mentioned replacement camera lens includes
Storage unit stores corrected value relevant to focal adjustments according to the image height position of the imaging area of photographing element, and Above-mentioned corrected value is output to above-mentioned camera body；And
Vibration-proof section makes a part of above-mentioned photographic optical system on the direction vertical with the optical axis of above-mentioned photographic optical system It moves to correct hand shaking, and exports information relevant to the movement of a part of above-mentioned photographic optical system,
Operational part calculates focal adjustments signal according to the output of above-mentioned focus detection pixel；And
Above-mentioned correction unit according to above-mentioned focus detection pixel image height position, above-mentioned vibration-proof section output with above-mentioned photography light The corresponding above-mentioned corrected value of the relevant information of the movement of a part of system, corrects above-mentioned focal adjustments signal.
6. a kind of focus adjusting method of photographic device, the photographic device include photographing element, there is reception to have passed through photography The light beam of camera lens simultaneously carries out photoelectric conversion and exports the camera shooting pixel and focus detection pixel as signal；And vibration-proof section, Its make above-mentioned photographing element the side vertical with the optical axis of above-mentioned phtographic lens be moved upward to correction hand shaking, and export with it is upper State the relevant information of movement of photographing element, which is characterized in that the focus adjusting method of the photographic device comprises the steps of:
Focus detection area is set to above-mentioned photographing element；
According to the output for multiple focus detection pixels that above-mentioned focus detection area is included, focal adjustments signal is generated；With And
According to corrected value, the position of the information that above-mentioned vibration-proof section exports and above-mentioned focus detection area, above-mentioned focal adjustments are corrected Signal,
Above-mentioned corrected value is corrected to above-mentioned focal adjustments signal according to the image height position of above-mentioned focus detection pixel Value, indicates the ratio between unit image planes amount of movement on the optical axis of the image planes amount of movement and above-mentioned phtographic lens at above-mentioned image height position Information,
According to the mobile phase with above-mentioned photographing element of image height position, the output of above-mentioned vibration-proof section with above-mentioned focus detection pixel The corresponding above-mentioned corrected value of the information of pass, corrects above-mentioned focal adjustments signal.
7. a kind of focus adjusting method of photographic device, the photographic device include photographing element, there is reception to have passed through photography The light beam of camera lens simultaneously carries out photoelectric conversion and exports the camera shooting pixel and focus detection pixel as signal；And vibration-proof section, Its camera lens part for making above-mentioned phtographic lens be included is moved upward to correction hand in the side vertical with the optical axis of above-mentioned phtographic lens It trembles, and exports information relevant to the movement of above-mentioned camera lens part, which is characterized in that the focus adjusting method of the photographic device has There are following steps:
Above-mentioned corrected value is value relevant to focal adjustments, indicates the picture at the image height position of the imaging area of above-mentioned photographing element The information of the ratio between unit image planes amount of movement on the optical axis of face amount of movement and above-mentioned phtographic lens,
It is mobile related with above-mentioned camera lens part according to being exported to the image height position of above-mentioned focus detection pixel, above-mentioned vibration-proof section The corresponding above-mentioned corrected value of information, correct above-mentioned focal adjustments signal.
CN201580018804.7A 2014-04-10 2015-02-23 The focus adjusting method of focus-regulating device, camera arrangement and photographic device CN106164730B (en)
JP2014081016A JP6438671B2 (en) 2014-04-10 2014-04-10 Focus adjustment apparatus, camera system, and focus adjustment method of imaging apparatus
JP2014-081016 2014-04-10
PCT/JP2015/054954 WO2015156042A1 (en) 2014-04-10 2015-02-23 Focal point adjustment device, camera system, and focal point adjustment method for imaging device
CN106164730A CN106164730A (en) 2016-11-23
CN106164730B true CN106164730B (en) 2019-04-09
ID=54287623
CN201580018804.7A CN106164730B (en) 2014-04-10 2015-02-23 The focus adjusting method of focus-regulating device, camera arrangement and photographic device
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