CN101435974A - Camera - Google Patents
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- CN101435974A CN101435974A CNA2008101742836A CN200810174283A CN101435974A CN 101435974 A CN101435974 A CN 101435974A CN A2008101742836 A CNA2008101742836 A CN A2008101742836A CN 200810174283 A CN200810174283 A CN 200810174283A CN 101435974 A CN101435974 A CN 101435974A
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Abstract
The invention provides a camera which can be driven in a high speed and shorten time delay in the case of carrying out shutter action in a second shooting preparation state such as the live view display. When the camera is in a live view display state, the magnet adsorption (S5) in the shutter first curtain is relieved, thus allowing the shutter first curtain to move and carrying out live view display (S7) according to the output from CCD221; in such moment, shutter rear curtain keeps in a connection (absorption) state, and the shutter is in an open state. The AF switch is put through (S11), and the shutter rear curtain also keeps in an open state when the phase separation AF based on TTL measuring distance, thus reducing the tight load on the shutter and shortening time delay.
Description
Technical field
The present invention relates to camera, at length say, relate to the camera of the 2nd open these two states of photography standby condition of the 1st photography standby condition and shutter with shutter close.
Background technology
In recent years, known have a camera with live view Presentation Function, following digital single-lens reflex camera that can live view is for example disclosed in patent documentation 1: make moving reflector keep out of the way and under the state of focal plane formula shutter standard-sized sheet shot object image is imported imaging apparatus from light path of photography, show thus obtained shot object image continuously on LCD monitor.In this patent documentation 1 disclosed camera, when the focusing switch connection, moving reflector is inserted in the light path of photography, carry out the detection of focus deviation by so-called TTL phase differential AF, carry out focal adjustments according to this focus deviation.After the focal adjustments release, moving reflector is kept out of the way from light path of photography, begin live view once more and show.
[patent documentation 1] TOHKEMY 2005-20397 communique
Electrical source consumption when using Fig. 6 explanation in live view shows, to carry out auto-focus adjusting action.In Fig. 6, transverse axis illustrates the process of time, and the longitudinal axis illustrates electric power.In live view shows ((6) among the figure), when the AF switch connection, the beginning auto-focus is regulated action.At first, moving reflector is descended and insert in the light path of photographic optical system (insertion state), and, carry out the tightening of force application parts such as spring (" catoptron descends, shutter tighten " among the figure) of shutter.The power supply of this moment is supplied with and is E1.Then, carry out photometry, range finding and computing ((1) among the figure).That is, distance measuring sensor receives the subject light beam via moving reflector, obtains the focus deviation of photographic optical system.And, utilize photometry sensor that photometry is carried out in subject brightness.
After range finding, computing etc. finish, then connect shutter magnet, that is, make to keep the magnet of fast curtain in front of the door and back curtain to become adsorbed state ((4) among the figure).Then, make moving reflector move to lifting position (keeping out of the way " catoptron rising " among state, the figure), and, drive phtographic lens ((2) among the figure) to focusing position.After catoptron rises end, begin live view once more and show ((6) among the figure).This a succession of action, promptly play from the AF switch connection and begin to carry out various processing till live view shows once more and need time t1.
Like this, in live view shows, carry out under the situation of TTL phase differential AF, before and after it, must carry out the decline and the rising of moving reflector, the range finding spended time.Promptly, in open the 2nd the photographing in the camera of these two states of standby condition (for example live view show state) of the 1st photography standby condition (for example utilizing the observation state of optical finder) and shutter with shutter close, under the situation that the 2nd photography is found range in the standby condition etc., the moving reflector and the shutter action that roughly need a sequence, so, have the long problem of time-delay.
Summary of the invention
The present invention finishes in light of this situation, and its purpose is to provide a kind of camera, and this camera shows in the grade in an imperial examination 2 photography standby condition at live view and carry out under the situation of shutter action, can high-speed driving, and shorten time-delay.
In order to reach above-mentioned purpose, the camera of the 1st aspect has: photographic optical system; Image unit, it can take the light beam from above-mentioned photographic optical system; Focal plane formula shutter unit, it is configured between above-mentioned photographic optical system and the above-mentioned image unit; And driver element, it can drive above-mentioned shutter unit, this camera can be selected the 1st photography standby condition and the 2nd photography standby condition, the 1st photography standby condition is the state of above-mentioned shutter close, the 2nd photography standby condition is above-mentioned shutter opened state, wherein, and when in above-mentioned the 2nd photography standby condition, carrying out the shutter driving, keeping under the opened state of above-mentioned shutter, driving above-mentioned driver element.
The camera of the 2nd aspect aspect the above-mentioned the 1st in, the back curtain magnet of above-mentioned shutter is switched on by continuing, keep the opening of shutter.
And, the camera of the 3rd aspect aspect the above-mentioned the 1st in, above-mentioned the 2nd the photography standby condition be the live view state of camera.
In order to reach above-mentioned purpose, the camera of the 4th aspect has: photographic optical system; Image unit, it can take the light beam from above-mentioned photographic optical system; Focal plane formula shutter unit, it is configured between above-mentioned photographic optical system and the above-mentioned image unit; Driver element, it can drive above-mentioned shutter unit; Range cells, it can use from the light beam of above-mentioned photographic optical system and find range; And reflection part, it can move can reflecting from the insertion state of the light beam of above-mentioned photographic optical system with from keeping out of the way between the state of keeping out of the way from the light beam of above-mentioned photographic optical system, this camera can be selected the 1st photography standby condition and the 2nd photography standby condition, the 1st photography standby condition is that above-mentioned reflection part is the state of insertion state and above-mentioned shutter close, the 2nd photography standby condition is that above-mentioned reflection part is for keeping out of the way state and above-mentioned shutter opened state, wherein, when in above-mentioned the 2nd photography standby condition, finding range action, keeping under the opened state of above-mentioned shutter, driving above-mentioned driver element.
The camera of the 5th aspect aspect the above-mentioned the 4th in, above-mentioned the 2nd the photography standby condition be the live view state of camera.
And, the camera of the 6th aspect aspect the above-mentioned the 4th in, above-mentioned the 1st the photography standby condition be the state that can find range.
And then, the camera of the 7th aspect aspect the above-mentioned the 4th in, above-mentioned driver element also drives above-mentioned reflection part except driving above-mentioned shutter unit.
And then, the camera of the 8th aspect aspect the above-mentioned the 4th in, above-mentioned the 1st the photography standby condition be the insertion state of above-mentioned reflection part, be the state that can carry out above-mentioned range finding immediately.
In order to reach above-mentioned purpose, the camera of the 9th aspect has: photographic optical system; Image unit, it can take the light beam from above-mentioned photographic optical system; Focal plane formula shutter unit, it is configured between above-mentioned photographic optical system and the above-mentioned image unit; And driver element, it can drive above-mentioned shutter unit, this camera can be selected the 1st photography standby condition and the 2nd photography standby condition, the 1st photography standby condition is the state of above-mentioned shutter close, the 2nd photography standby condition is above-mentioned shutter opened state, wherein, and when in above-mentioned the 2nd photography is prepared, carrying out TTL phase differential AF, under the state of open above-mentioned shutter, drive above-mentioned driver element.
In order to reach above-mentioned purpose, the camera of the 10th aspect has: photographic optical system; Image unit, it can take the light beam from above-mentioned photographic optical system; Reflection part, it is configured between above-mentioned photographic optical system and the finder optical system; And reflection part driver element, it can drive above-mentioned reflection part, this camera can be selected the 1st photography standby condition and the 2nd photography standby condition, the 1st photography standby condition is the state of above-mentioned shutter close, the 2nd photography standby condition is above-mentioned shutter opened state, wherein, and when in above-mentioned the 2nd photography is prepared, carrying out the driving of above-mentioned reflection part, under the state of open above-mentioned shutter, drive above-mentioned driver element.
According to the present invention, a kind of camera can be provided, this camera shows in the grade in an imperial examination 2 photography standby condition at live view and carries out under the situation of shutter action, can high-speed driving, and shorten time-delay.
Description of drawings
Fig. 1 is the figure that is illustrated in the digital single-lens reflex camera of an embodiment of the invention along the inner structure of the optical axis direction of phtographic lens.
Fig. 2 is the integrally-built block diagram of main electrical system that the digital single-lens reflex camera of an embodiment of the invention is shown.
Fig. 3 is the figure of electric power amount of necessity in photography when action that the digital single-lens reflex camera of an embodiment of the invention is shown.
Fig. 4 is the figure of the electric power amount of digital single-lens reflex camera that an embodiment of the invention are shown necessity when carrying out the AF action in live view shows.
Fig. 5 is the process flow diagram of live view display action that the digital single-lens reflex camera of an embodiment of the invention is shown.
Fig. 6 is the figure of the electric power amount of the necessity when existing digital single-lens reflex camera being shown carrying out the AF action in live view shows.
Label declaration
21: range cells; 23: shutter unit; 24: image unit; 25: circuit substrate; 26: LCD monitor; 100: change camera lens; 101: photographic optical system; 103: aperture; 107: the optical system driving mechanism; 109: the aperture driving mechanism; 111: camera lens CPU; 200: camera body; 201: moving reflector; 203: secondary catoptron; 205: focusing glass; 207: pentaprism; 211: photometry sensor; 213: focal plane formula shutter; 215: fast door drive mechanism; 217: range-measuring circuit; 219: mirror drive mechanism; 221:CCD; The 223:CCD driving circuit; The 225:CCD interface; 227: image processing circuit; 229: host CPU (sequence controller); 231: compressed and decompressed circuit; 233: flash memory control circuit; 235: flash memory; The 236:SDRAM control circuit; 237:SDRAM; 239: imput output circuit; 241: telecommunication circuit; 243: the recording medium control circuit; 245: recording medium; 247: video signal output circuit; 249: the LCD monitor driving circuit; 253: the switch testing circuit; 255: various switches; 257: camera lens loading and unloading detector switch; 261: data bus; 271:ASIC; 300: the communication contact.
Embodiment
Below, a preferred embodiment of having used digital single-lens reflex camera of the present invention is used in explanation with reference to the accompanying drawings.Fig. 1 is in the inner structure of the digital single-lens reflex camera of an embodiment of the invention, along the inner structure block diagram of the optical axis direction of phtographic lens.
On the optical axis of the photographic optical system 101 that is disposed at the inside of changing camera lens 100, in the reflector box of camera body 200, dispose moving reflector 201.This moving reflector 201 can rotate between reflection position and retreating position, this reflection position be for the subject light beam being reflexed to pentaprism 207 finder optical systems such as grade with respect to the position of inclined light shaft 45 degree of photographic optical system 101, this retreating position be for shot object image is imported in the camera element unit 24 CCD (Charge Coupled Device) 221 (with reference to Fig. 2) and from position that light path of photography is kept out of the way.
The rotation axis of moving reflector 201 is along the direction vertical with the paper of Fig. 1.Reflect the subject light beam upward by this moving reflector 201.In addition, reflection upward in the present embodiment, but be not limited thereto, as long as make the reflection direction of subject light beam reach optimum condition according to the configuration of mechanism components or optics, no matter right-hand the or left of camera body can be selected.
On the reflection optical axis of moving reflector 201, dispose focusing glass 205.It is the imaging surface that is used for making by photographic optical system 101 imaging of subject light beam, is configured on the position with the distance of moving reflector 201 and CCD 221 equivalences in the image unit 24.Above focusing glass 205, dispose and be used to make the pentaprism 207 that reverses about shot object image.Dispose eyepiece 209 at the rear of pentaprism 207, the cameraman can confirm shot object image from eyepiece portion side observation eyepiece 209.Constitute the view finder unit by pentaprism 207 and eyepiece 209.
Constitute by semi-transparent semi-reflecting lens near the central authorities of moving reflector 201, be provided with at the back side of this moving reflector 201 and be used for range finding that the subject light beam that has seen through semi-transparent semi-reflecting lens portion is reflected with secondary catoptron 203.This pair catoptron 203 can rotate with respect to moving reflector 201, when moving reflector 201 from light path of photography keep out of the way, when the subject light beam incides the CCD 221 of image unit 24, this pair catoptron 203 turns to the position that covers semi-transparent semi-reflecting lens portion, when moving reflector 201 is positioned at illustrated shot object image observation place (insertion state), this pair catoptron 203 takeoffs with respect to moving reflector 201 and opens, and is positioned at the position that the part of subject light beam can be reflexed on the range cells 21.
On the reflected light path of secondary catoptron 203, dispose range cells 21, this range cells 21 includes the range-measuring circuit 217 (with reference to Fig. 2) of the TTL phase differential mode that having finds range uses sensor, by range cells 21, detect focus deviation by the shot object image of photographic optical system 101 imagings.
Dispose the shutter unit 23 that comprises focal plane formula shutter 213 (Fig. 2) at the rear of moving reflector 201.Disposing the image unit 24 that comprises CCD 221 at the rear of shutter unit 23, will be electric signal by the shot object image opto-electronic conversion of phtographic lens imaging.
Rear side at image unit 24 disposes circuit substrates 25 such as electric circuit.And at the back side of camera body 200, the position configuration that is easy to observe the user has LCD monitor 26.The reproduction that LCD monitor 26 is carried out the view data that live view shows, write down shows and the various demonstrations of various menu modes etc.In addition, LCD monitor 26 is configured in the back side of camera body 200, still, so long as the position that the cameraman can observe then is not limited to the back side, and is not limited to liquid crystal, certainly is other display device such as OLED display.And then, be not limited to fixedly, also can be movable monitor.
Then, use Fig. 2 that the one-piece construction based on electrical system of the digital single-lens reflex camera of present embodiment is described.In the digital single-lens reflex camera of present embodiment, change camera lens 100 and camera body 200 and constitute separately, both utilize communication contact 300 to be electrically connected.In addition, changing camera lens 100 and camera body 200 also can constitute integratedly.
Have changing camera lens 100 internal configurations: the photographic optical system 101 that focal adjustments and focus adjustment are used and be used to regulate the aperture 103 of opening amount.Connect into photographic optical system 101 and driven by lens driving mechanism 107, aperture 103 is connected to by aperture driving mechanism 109 and drives.
As mentioned above, in camera body 200, dispose: moving reflector 201, secondary catoptron 203, focusing glass 205, pentaprism 207 and eyepiece 209.Moving reflector 201 is driven by mirror drive mechanism 219.Dispose the eyepiece 209 that shot object image is observed usefulness in the exiting side of pentaprism 207, on its next door and do not hinder on the position of observing shot object image and dispose photometry sensor 211.Focusing glass 205, pentaprism 207 and eyepiece 209 constitute the part of finder optical system.
And, as mentioned above, be provided with secondary catoptron 203 at the back side of moving reflector 201, on the reflection direction of this pair catoptron 203, dispose the range-measuring circuit 217 that comprises distance measuring sensor.And then, disposing focal plane formula shutter 213 at the rear of moving reflector 201, this shutter 213 is by fast door drive mechanism 215 drive controlling.And, dispose CCD 221 as imaging apparatus at the rear of shutter 213, will by the shot object image opto-electronic conversion of photographic optical system 101 imagings electric signal.In addition, in the present embodiment,, use CCD, but be not limited thereto, can certainly use CMOS two-dimentional imaging apparatuss such as (Complementary Metal Oxide Semiconductor) as imaging apparatus.
(Application Specific Integrated Circuit: application-specific IC) data bus 261 in 271 is connected for image processing circuit 227 and ASIC.On this data bus 261, except image processing circuit 227, also be connected with host CPU 229, compressed and decompressed circuit 231, flash memory control circuit 233, SDRAM control circuit 236, imput output circuit 239, telecommunication circuit 241, recording medium control circuit 243, video signal output circuit 247 and switch testing circuit 253.
The flow process of host CPU 229 these digital single-lens reflex cameras of control that are connected with data bus 261.And the compressed and decompressed circuit 231 that is connected on the data bus 261 is following circuit: with JPEG or TIFF mode the view data that is stored among the SDRAM 237 is compressed, or decompressed on the contrary.In addition, compression of images is not limited to JPEG or TIFF, also can use other compression method.
The flash memory control circuit 233 that is connected with data bus 261 is connected with flash memory (Flash Memory) 235,235 storages of this flash memory are used to control the program of the flow process of single-lens reflex camera, and host CPU 229 carries out the control of digital single-lens reflex camera according to the program that is stored in this flash memory 235.In addition, flash memory 235 is erasable nonvolatile memories of writing.
SDRAM 237 is connected with data bus 261 via SDRAM control circuit 236, this SDRAM 237 be used for interim storage by image processing circuit 227 carry out after the Flame Image Process view data or by compressed and decompressed circuit 231 compressions or the memory buffer of the view data after decompressing.
The imput output circuit 239 that is connected with above-mentioned photometry sensor 211, fast door drive mechanism 215, range-measuring circuit 217 and mirror drive mechanism 219 waits the input and output of the data between each circuit via data bus 261 controls and host CPU 229.Via communication contact 300 and the telecommunication circuit 241 that is connected with camera lens CPU 111 is connected with data bus 261, carry out with host CPU 229 grades between exchanges data and the communicating by letter of control command.
The recording medium control circuit 243 that is connected with data bus 261 is connected with recording medium 245, carries out view data etc. is recorded control in this recording medium 245.Recording medium 245 constitutes any one that can load in the erasable recording medium such as xD-Picture Card (registered trademark), Compact Flash (registered trademark), SD MemoryCard (registered trademark) or Memory Stick (registered trademark), and can freely load and unload with respect to camera body 200.In addition, also can constitute and to connect hard disk via the communication contact.
The video signal output circuit 247 that is connected with data bus 261 is connected with LCD monitor 26 via LCD monitor driving circuit 249.Video signal output circuit 247 is following circuit: will be stored in view data in SDRAM237, the recording medium 245 and be converted to and be used for video signal displayed on LCD monitor 26.
Detect the switch of the switch (1st release-push, 2nd release-push) of the 1st stroke (half by) of shutter release button and the 2nd stroke (complete by), switch that the indication live view shows, indication reproduction mode, the various switches 255 such as OK switch of the switch, selected each pattern of decision etc. of the switch that moves, the indication photograph mode of instructs cursor load and unload detector switch 257 with camera lens and are connected with data bus 261 via switch testing circuit 253 on the picture of LCD monitor 26.
Then, use Fig. 3 explanation partly to press the electric power amount of photography that release-push then presses entirely necessity when moving.Among the figure, transverse axis illustrates the process of time, and the longitudinal axis illustrates the electric power amount.When partly pressing release-push, when the 1st release-push is connected, carrying out photometry, range finding, computing ((1) among the figure).That is, carry out photometry, find range, carry out the computing of photometry and range finding by host CPU 229 according to the output of range-measuring circuit 217 according to the output of photometry element 211.
In addition, this Fig. 3 is illustrated under the closed condition of shutter 213 state via optical finder is observed in the state of shot object image, the 1st release-push is connected.Show in the state of observing shot object image by live view that under shutter 213 opened state under the situation that the 1st release-push is connected, before this, it is "on" position that fast curtain behind the door keeps the magnet of usefulness.
Then, carry out lens driving ((2) among the figure).In this lens driving, according to the focus departure based on the range finding operation result, lens driving mechanism 107 drives photographic optical system 101 via camera lens CPU111, so that photographic optical system 101 arrives focusing position.After lens driving finishes, become standby condition ((3) among the figure), carry out showing in the optical finder etc.
The cameraman determines composition, when pressing release-push entirely, when being the connection of 2nd release-push, entering the photography action.At first, to the preceding curtain of maintenance focal plane formula shutter 213 and the shutter magnet energising ((4) among the figure) of back curtain.In addition, under the situation that 2nd release-push under the live view show state is connected, before this, it is "on" position that back curtain keeps with shutter magnet, so, on this basis, preceding curtain is kept with the energising of shutter magnet.After magnet begins energising, begin catoptron rising and aperture after a while and dwindle (" catoptron rising " and " aperture dwindles " among the figure).
Catoptron rises and is meant, makes the state (insertion state) of moving reflector 201 from the light path of inserting photographic optical system 101 turn to the state of keeping out of the way from light path (keeping out of the way state) via mirror drive mechanism 219.And aperture dwindles and is meant, the f-number from open state to f-number of obtaining the exposure computing or manually setting drives aperture 103 to aperture driving mechanism 109 via camera lens CPU111.
Then, when removing fast curtain in front of the door and keep the absorption of shutter magnet of usefulness, curtain begins to move in front of the door soon, begins exposure, imaging shot object image on CCD 221 ((5) among the figure).After time shutter through regulation, remove the absorption that fast curtain behind the door keeps the shutter magnet of usefulness, curtain begins to move behind the door soon, end exposure.
Behind end exposure, the beginning catoptron descends and shutter tightens, the reading of view data, aperture reset (in the drawings with mark demonstration of the same name).Aperture resets and is meant, aperture driving mechanism 109 drives aperture 103 from the aperture deflated state to open f-number via camera lens CPU111.Reading of view data be meant, reads by CCD 221 by CCD driving circuit 223 and carry out signal charge after the opto-electronic conversion, reads processing by CCD interface circuit 225 and image processing circuit 227 etc. as view data.
Catoptron descends and is meant, makes moving reflector 201 be turned to the state (insertion state) that inserts the light path by the state of keeping out of the way from the light path of photographic optical system 101 (keeping out of the way state) via mirror drive mechanism 219.Shutter tightens and is meant, fast curtain in front of the door and back curtain is carried out the tightening of elastomeric element of the application of force.And when the catoptron down maneuver, subtend ascent direction (keeping out of the way state) carries out spring to the elastomeric element of moving reflector 201 application of forces and tightens.For these elastomeric elements are tightened, so, descending and shutter when tightening at catoptron, it is E1 that supply capability increases.
In addition, carry out simultaneously that aperture resets, the reading of view data, catoptron descends and shutter tightens, so the electric power that can supply with respectively is assigned to the degree that can supply with upper limit electric power that is no more than.When carrying out the AF action in the live view demonstration under this existing power is distributed, as mentioned above, be time t1, (saying the time of the shooting usefulness that (5) among removal Fig. 3 are spent exactly) ta+tb is roughly the same with the needed time of exposure.
The electric power amount of the necessity when then, using Fig. 4 explanation operation A F switch in live view shows to carry out regulating based on the auto-focus of TTL phase differential AF.Among the figure, transverse axis illustrates the process of time, and the longitudinal axis illustrates the electric power amount.Before operation A F switch makes its connection, carry out live view and show ((6) among the figure).The live view demonstration is meant, obtains view data periodically by CCD 221, in order to observe shot object image it is presented on the LCD monitor 26.In addition, as the AF switch, can utilize the switch of partly pressing in response to release-push, with the switch of focus lock button interlock or with the switch of AF operational order dedicated button interlock etc.
After entering the live view demonstration, as mentioned above, the supply capability amount E3 for the magnet energising is switched on ((7) among the figure) in the back curtain maintenance of shutter 213 with magnet.This electric power amount E3 has carried out exaggeration in the drawings to be described, and still, is substantially about 30mA～40mA, compare with the needed electric power amount of shutter 213 and tightening of moving reflector 201, and be small amount.
When cameraman's operation A F switch (" AF SW connection " among Fig. 4) so that subject is focused, carry out that catoptron descends and shutter tightens (" catoptron decline, shutter tighten " among Fig. 4).At this moment, under the state that the back curtain is kept with the magnet energising, moving reflector 201 is descended (insertion state), carry out shutter and tighten.Therefore, the needed electric power amount that tightens that back curtain moves the force application part of usefulness seldom gets final product, so catoptron decline, the shutter of the electric power amount E2 of this moment during than common photography tightens needed electric power amount E1 and lack and get final product.And, magnet keep the electric power amount E4 of usefulness to be approximately electric power amount E3 half get final product.
When catoptron descends and after shutter tightens end, follows, (with reference to Fig. 3) similarly carries out photometry, range finding, computing when connecting with the 1st release-push.Then, carry out the connection ((4) among Fig. 4) of lens driving ((2) among Fig. 4), catoptron rising (" catoptron rising " among Fig. 4), shutter magnet.After these releases, begin live view once more and show ((6) among Fig. 4).
When carrying out the AF action of existing live view in showing, identical electric power when supplying with photography is so AF moves needs the time
(with reference to Fig. 6).Relative therewith, in the present embodiment, in live view shows, magnet energising to the back curtain keeps usefulness remains open state with the back curtain, so, when the AF in carrying out the live view demonstration moved, it was that E2 gets final product that the shutter when catoptron descends tightens needed electric power amount.Promptly, the load of the load device side of supply capability reduces, so,, can will move the needed time and shorten to time t2 (t2＜t1) to beginning AF till live view shows once more behind the AF switch connection even the electric power amount is E2 also can realize the high speed that moves.
Then, use the execution of the AF action in the flowchart text live view demonstration shown in Figure 5.Behind the functional unit of having operated indication live view display mode, become the live view display mode.After entering the live view display mode, at first, connect the curtain magnet and curtain magnet (S1) behind the door in front of the door soon soon of the fast curtain in front of the door keep focal plane formula shutter 213 respectively and back curtain.
Then, make moving reflector 201 rise, promptly move (S3) to the position of keeping out of the way state.Then, remove the fast absorption of curtain magnet in front of the door, make soon in front of the door that curtain moves, open shutter 213 (S5).
Then, carry out live view shooting and demonstration (S7).That is, under this state, moving reflector 201 is kept out of the way, and shutter 213 also is open state, so the subject light beam that has passed through photographic optical system 101 can not be blocked, imaging on CCD 221.Obtain view data from this CCD 221, on LCD monitor 26, carry out live view and show.
Then, judge that whether proceeding live view shows (S9).Taken a decision as to whether and stopped live view and show and operated functional unit.In result of determination is under the situation about proceeding, and judges then whether the AF switch connects (S11).In result of determination is under the situation of AF switch access failure, returns step S7, proceeds live view and shows.
Be (timing of the T11 of Fig. 4) under the situation of AF switch connection in result of determination, stop shooting (S13).That is, make CCD 221 stop to obtain view data.Then, final frame is presented at (S15) on the LCD monitor 26 as still image.When in AF action when CCD 221 obtains view data and show, image is chaotic and be difficult to observe, so, with the demonstration that fixes of the mode of final image.
Then, decline of beginning catoptron and shutter tighten (timing of the T11 of S19, Fig. 4).Catoptron descends and shutter tightens and is meant, makes moving reflector 201 move to the insertion state from keeping out of the way state, and, carry out the tightening of elastomeric element etc. of shutter 213.In addition, the absorption of the shutter magnet of the back curtain of maintenance shutter 213 has obtained maintenance, so curtain remains open state behind the door soon.
When catoptron descends and after shutter tightens end, find range (timing of S21, T12).It is identical with above-mentioned range finding to find range, and uses the subject light beam by secondary catoptron 203 reflections, is undertaken by the TTL phase difference ranging.And, carry out photometry equally.After range finding finishes, connect fast curtain in front of the door and keep the shutter magnet of usefulness to adsorb maintenance (timing of S23, T13).In addition, back curtain keeps the shutter magnet of usefulness to be switched in step S1, adsorbs maintenance.
And, drive moving reflector 201 after a while, make moving reflector 201 carry out vertical motion, promptly be in and keep out of the way state (timing of S25, T14).Simultaneously, according to the range finding result, drive photographic optical system 101 towards focusing position.After catoptron rises end, return step S5, show to begin live view once more, carry out above-mentioned action (timing of T15).
In the result of determination of step S9 is to be through with under the situation that live view shows, stops the shooting of CCD221 and the live view of LCD monitor 26 and shows (S31).Then, disconnect the back curtain magnet of shutter 213, curtain behind the mobile shutter is closed shutter 213 (S33).Then, carry out catoptron decline and shutter and tighten (S35).
As described above, in the present embodiment, in open the 2nd the photographing in the camera of these two states of standby condition (for example live view show state) of the 1st photography standby condition (for example utilizing the observation state of optical finder) and shutter with shutter close, under the situation that the 2nd photography is found range in the standby condition etc., when in the 2nd photography standby condition, carrying out the shutter driving, keeping under the opened state of shutter, driver element is driven.Therefore, shutter tightens needed load and diminishes, and consequently, the shutter that can drive shutter 213 at high speed tightens, and can shorten time-delay when carrying out the AF action.
In addition, in the present embodiment, in live view shows, connect under the situation of AF switch, descend and during the catoptron rising (S25) of shutter after tightening (S19) and range finding at catoptron, the electric power amount of the respective action of the electric power amount of supplying with when photographing is identical, supplies with common electric power amount.But,, can further realize the high speed of AF action by the electric power amount of in any step at least, increasing supply.
And in the present embodiment, the shutter that carries out shutter 213 together tightens the decline with moving reflector 201, but, also can carry out, under this situation, certainly only change type of drive among the either party in shutter 213 and moving reflector 201 in different timings.
And then, in the present embodiment,, still, also can be pulse current with the DC current supply capability, under this situation, change average electric power amount according to the change of type of drive and get final product.And then, by secondary catoptron 203 the subject light beam is imported range cells 21, still, can certainly be by importing subject light beams such as semi-transparent semi-reflecting lens.
The invention is not restricted to above-mentioned embodiment, the implementation phase, in the scope that does not break away from its purport, can the distressed structure key element and specialize.And,, can form various inventions by the appropriate combination of the disclosed a plurality of textural elements of above-mentioned embodiment.For example, also can from the entire infrastructure key element shown in the embodiment, delete several textural elements.And then, the textural element in also can the appropriate combination different embodiments.
Claims (10)
1. camera, this camera has:
Photographic optical system;
Image unit, it can take the light beam from above-mentioned photographic optical system;
Focal plane formula shutter unit, it is configured between above-mentioned photographic optical system and the above-mentioned image unit; And
Driver element, it can drive above-mentioned shutter unit,
This camera can be selected the 1st photography standby condition and the 2nd photography standby condition, and the 1st photography standby condition is the state of above-mentioned shutter close, and the 2nd photography standby condition is above-mentioned shutter opened state,
This camera is characterised in that,
When in above-mentioned the 2nd photography standby condition, carrying out the shutter driving, keeping under the opened state of above-mentioned shutter, drive above-mentioned driver element.
2. camera according to claim 1 is characterized in that,
By continuation the back curtain magnet of above-mentioned shutter is switched on, keep the opening of shutter.
3. camera according to claim 1 is characterized in that,
Above-mentioned the 2nd photography standby condition is the live view state of camera.
4. camera, this camera has:
Photographic optical system;
Image unit, it can take the light beam from above-mentioned photographic optical system;
Focal plane formula shutter unit, it is configured between above-mentioned photographic optical system and the above-mentioned image unit;
Driver element, it can drive above-mentioned shutter unit;
Range cells, it can use from the light beam of above-mentioned photographic optical system and find range; And
Reflection part, it can move can reflecting from the insertion state of the light beam of above-mentioned photographic optical system with from keeping out of the way between the state of keeping out of the way from the light beam of above-mentioned photographic optical system,
This camera can be selected the 1st photography standby condition and the 2nd photography standby condition, the 1st photography standby condition is that above-mentioned reflection part is the state of insertion state and above-mentioned shutter close, the 2nd photography standby condition is that above-mentioned reflection part is for keeping out of the way state and above-mentioned shutter opened state
This camera is characterised in that,
When in above-mentioned the 2nd photography standby condition, finding range action, keeping under the opened state of above-mentioned shutter, drive above-mentioned driver element.
5. camera according to claim 4 is characterized in that,
Above-mentioned the 2nd photography standby condition is the live view state of camera.
6. camera according to claim 4 is characterized in that,
Above-mentioned the 1st photography standby condition is the state that can find range.
7. camera according to claim 4 is characterized in that,
Above-mentioned driver element also drives above-mentioned reflection part except driving above-mentioned shutter unit.
8. camera according to claim 4 is characterized in that,
Above-mentioned the 1st photography standby condition is the insertion state of above-mentioned reflection part, is the state that can carry out above-mentioned range finding immediately.
9. camera, this camera has:
Photographic optical system;
Image unit, it can take the light beam from above-mentioned photographic optical system;
Focal plane formula shutter unit, it is configured between above-mentioned photographic optical system and the above-mentioned image unit; And
Driver element, it can drive above-mentioned shutter unit,
This camera can be selected the 1st photography standby condition and the 2nd photography standby condition, and the 1st photography standby condition is the state of above-mentioned shutter close, and the 2nd photography standby condition is above-mentioned shutter opened state,
This camera is characterised in that,
When in above-mentioned the 2nd photography is prepared, carrying out TTL phase differential AF, under the state of open above-mentioned shutter, drive above-mentioned driver element.
10. camera, this camera has:
Photographic optical system;
Image unit, it can take the light beam from above-mentioned photographic optical system;
Reflection part, it is configured between above-mentioned photographic optical system and the finder optical system; And
The reflection part driver element, it can drive above-mentioned reflection part,
This camera can be selected the 1st photography standby condition and the 2nd photography standby condition, and the 1st photography standby condition is the state of above-mentioned shutter close, and the 2nd photography standby condition is above-mentioned shutter opened state,
This camera is characterised in that,
When in above-mentioned the 2nd photography is prepared, carrying out the driving of above-mentioned reflection part, under the state of open above-mentioned shutter, drive above-mentioned driver element.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007298737 | 2007-11-18 | ||
| JP2007-298737 | 2007-11-18 | ||
| JP2007298737A JP2009122557A (en) | 2007-11-18 | 2007-11-18 | Camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101435974A true CN101435974A (en) | 2009-05-20 |
| CN101435974B CN101435974B (en) | 2011-04-06 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101742836A Expired - Fee Related CN101435974B (en) | 2007-11-18 | 2008-11-17 | Camera |
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| JP (1) | JP2009122557A (en) |
| CN (1) | CN101435974B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102137234A (en) * | 2010-01-25 | 2011-07-27 | 奥林巴斯映像株式会社 | Image pickup apparatus |
| CN103299237A (en) * | 2011-08-24 | 2013-09-11 | 松下电器产业株式会社 | Focal-plane shutter device and image capturing device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5484229B2 (en) | 2010-07-12 | 2014-05-07 | セイコープレシジョン株式会社 | Focal plane shutter and optical equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007025569A (en) * | 2005-07-21 | 2007-02-01 | Olympus Imaging Corp | Digital single-lens reflex camera |
| JP2007298742A (en) * | 2006-04-28 | 2007-11-15 | Olympus Imaging Corp | Camera capable of live view |
| JP2007298741A (en) * | 2006-04-28 | 2007-11-15 | Olympus Imaging Corp | Single lens reflex camera enabling live view |
-
2007
- 2007-11-18 JP JP2007298737A patent/JP2009122557A/en active Pending
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2008
- 2008-11-17 CN CN2008101742836A patent/CN101435974B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102137234A (en) * | 2010-01-25 | 2011-07-27 | 奥林巴斯映像株式会社 | Image pickup apparatus |
| CN102137234B (en) * | 2010-01-25 | 2014-08-27 | 奥林巴斯映像株式会社 | Image pickup apparatus |
| CN103299237A (en) * | 2011-08-24 | 2013-09-11 | 松下电器产业株式会社 | Focal-plane shutter device and image capturing device |
| US9110353B2 (en) | 2011-08-24 | 2015-08-18 | Panasonic Intellectual Property Management Co., Ltd. | Focal plane shuttering apparatus and image capture device |
| CN103299237B (en) * | 2011-08-24 | 2016-04-27 | 松下电器产业株式会社 | Focal-plane shutter device and camera head |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009122557A (en) | 2009-06-04 |
| CN101435974B (en) | 2011-04-06 |
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