CN1727981A - Light amount adjusting apparatus and image pickup apparatus - Google Patents
Light amount adjusting apparatus and image pickup apparatus Download PDFInfo
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- CN1727981A CN1727981A CN200510088731.7A CN200510088731A CN1727981A CN 1727981 A CN1727981 A CN 1727981A CN 200510088731 A CN200510088731 A CN 200510088731A CN 1727981 A CN1727981 A CN 1727981A
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Abstract
Disclosed is a light amount adjusting apparatus for an image pickup apparatus which is capable of reducing the force with which a plate member and a blade member are held in close contact with each other and driving the blade member smoothly even in a high-humidity condition. The light amount adjusting apparatus includes a base plate 5 having an opening 5 a, a blade member 1 movable within a range including a position where the blade member overlaps the opening 5 a in a light axis direction and restricting the amount of light passing through the opening 5 a by overlapping the opening 5 a, and a plate member 2 adjacent to the blade member 1 and having a cut portion 2 a at a position where the plate member overlaps the blade member 1 in the light axis direction in a state in which the blade member 1 is at a predetermined position.
Description
Technical field
The present invention relates to a kind of light amount control apparatus that is arranged in digital camera etc., and relate to a kind of camera head that this device is housed.
Background technology
Recently, can be received in image in the storer and do not use the digital camera of film to enter widely-used rapidly.In such digital camera, a kind of camera that possesses function like this is arranged, by means of this function, this camera is put into aperture blades or shift out light beam according to object illumination, changes the light quantity that arrives image unit thus.In this process, the general practice is to drive aperture blades by a special-purpose electromagnetic actuators, regulates to carry out light quantity.And, have a kind of device that usually is used in digital camera with in-built CCD, video camera etc.This device adopts a kind of exposure structure, in this exposure structure, a ND light filter that is suitable for reducing passing its light quantity is bonded on the part of aperture blades, and in this exposure structure, when the size of the aperture openings portion that is formed by aperture blades became less than certain size, the ND light filter was inserted in the aperture openings portion.
Each aperture blades generally all forms as a shutter unit; In the exemplary of the structure of such shutter unit, a blade is included in the substrate, and a dividing plate is placed on it; And before covering all with a shutter cover, an aperture blades is placed on it.Actuator that is used for driving blade and aperture blades on the optical axis direction of blade and aperture blades with respect to substrate arranged at opposite side.
When a kind of like this photographic means when for example digital camera is used in the rugged surroundings such as having high humility, dewfall may take place in camera, this causes the problem of built-in function aspect.In view of this, various countermeasures have been taked; For example, be provided with one and be used for allowing air pass in and out the air vent of camera body, the increase of restricted internal humidity thus, perhaps, as disclosed among the Japanese Patent Application No.2000-171874, be provided with the dewfall sniffer of the dewfall that is used for surveying in camera body.
Yet, the problem that the method for the air vent be used for preventing dewfall has is set is, as the whole result who reduces of camera size,, and almost there is not the possibility of effectively arranging air vent relevant for the restriction in the space that is used for being provided with air vent.And the intensification along with the cost competition has the demand to reducing cost; In this case, arrange a kind of like this dewfall acquisition sensor difficulty considerably, and guarantee that the space that is used for this sensor also becomes difficult further.
And, forming under the situation of above-mentioned shutter unit, when dewfall generation and aperture blades and dividing plate began that close proximity is touched each other, the driving load of aperture blades increased, thereby need increase driving force by for example increasing actuator.Yet, because restriction as the whole result's who reduces of camera size aspect, space, can not realize a kind of like this structure, wherein, the actuator that is used for aperture blades increases, so that drive aperture blades with the bigger driving force of power that remains on than aperture blades and dividing plate in closely contacting mutually.
In addition, a kind of method is arranged, according to this method, hemispherical projections is arranged on the aperture blades, the position is set begins to contact each other part at aperture blades and dividing plate, purpose be to prevent as much as possible aperture blades and dividing plate each other close proximity touch.Figure 15 A and 15B show the aperture blades 1 that is provided with hemispherical projections '.Figure 15 A be aperture blades 1 ' front view, and Figure 15 B be aperture blades 1 ' rear view.An opening 1a ' of aperture blades 1 ' be provided with, one cover the ND light filter 9 of this opening and be arranged on aperture blades 1 ' a side on hemispherical projections 1b '.Because hemispherical projections 1b ', aperture blades 1 ' and dividing plate 2 between contact area be reduced, even thereby under high humidity, also can reduce dividing plate 2 and aperture blades 1 ' remain on the power in closely contacting each other, and can operate reposefully aperture blades 1 '.Yet in this case, aperture blades also may be crooked or comes off, and makes to be difficult to eliminate fully tight contact the between aperture blades and the dividing plate.And, the progress that reduces along with size, need to eliminate in addition with these protruding corresponding spaces.
Summary of the invention
One object of the present invention is, a kind of camera head that is used for the light amount control apparatus of camera head and this light amount control apparatus is housed is provided, this light amount control apparatus can reduce plate member and blade part are remained on each other power in closely contacting, allows the smooth drive of blade part thus.
In order to reach above purpose, as one of feature of the present invention, adopted a kind of light amount control apparatus that is used in the camera head, it is characterized in that this light amount control apparatus comprises: substrate has an opening; Blade part can comprise that blade part moves on optical axis direction with in the scope of opening position overlapped, be used for by and light quantity restricted passage opening overlapping with opening; And plate member, it is adjacent with blade part, and is at blade part under the state in precalculated position and has a notch portion with blade part position overlapped place in plate member on optical axis direction.
Another feature of the present invention relates to a kind of camera head that above-mentioned light amount control apparatus is housed and is suitable for arriving by light amount control apparatus control the light quantity of shooting part.
Description of drawings
Fig. 1 is a kind of decomposition diagram of light amount control apparatus according to an embodiment of the invention;
Fig. 2 is the front view that is inserted under the state in the light path light amount control apparatus as shown in Figure 1 at aperture blades;
Fig. 3 is at aperture blades as shown in Figure 1 front view of light amount control apparatus under the state of light path withdrawal;
Fig. 4 is the cut-open view of light amount control apparatus as shown in Figure 1;
Fig. 5 is the decomposition diagram of a kind of modification of light amount control apparatus according to an embodiment of the invention;
Fig. 6 is the front view that is inserted under the state in the light path light amount control apparatus as shown in Figure 5 at aperture blades;
Fig. 7 is the skeleton view of a kind of digital camera under the energized state according to an embodiment of the invention;
Fig. 8 is the skeleton view of a kind of digital camera under the deenergization state according to an embodiment of the invention;
Fig. 9 is the vertical view of a kind of digital camera under the energized state according to an embodiment of the invention;
Figure 10 is the upward view of a kind of digital camera under the deenergization state according to an embodiment of the invention;
Figure 11 is a kind of rear view of digital camera according to an embodiment of the invention;
Figure 12 is a calcspar, shows a kind of circuit structure of digital camera according to an embodiment of the invention;
Figure 13 is a process flow diagram, and the operation of a kind of according to an embodiment of the invention digital camera when taking a picture is described;
Figure 14 is a process flow diagram, and the operation of a kind of digital camera under the deenergization state according to an embodiment of the invention is described;
Figure 15 A is the front view that is provided with a kind of aperture blades of the hemispherical projections that is used for reducing the contact area between dividing plate and aperture blades; And
Figure 15 B is the rear view that is provided with a kind of aperture blades of the hemispherical projections that is used for reducing the contact area between dividing plate and aperture blades.
Embodiment
Fig. 7 to 11 is charts that a kind of digital camera that constitutes photographic means is shown, and this photographic means is equipped with light amount control apparatus according to an embodiment of the invention.More particularly, Fig. 7 is the appearance skeleton view of digital camera, its slip lens cap is opened with respect to camera body, Fig. 8 is the appearance skeleton view of digital camera, and its slip lens cap is closed with respect to camera body, and Fig. 9 is the vertical view of digital camera, its slip lens cap is opened with respect to camera body, Figure 10 is the upward view of digital camera, and its slip lens cap is closed with respect to camera body, and Figure 11 is the rear view of digital camera.
As shown in Figure 8, the digital camera of this embodiment is slide lid types with 15 expressions; When digital camera did not use, the front surface of photographic lens tube 10 was stamped a slip lens cap 18; As shown in Figure 7, in the time will using digital camera, make slip lens cap 18 lateral slips, expose photographic lens tube 10 thus.
On the front surface of digital camera 15, be provided with photometry/ranging unit 13 that view finder that the picture of a definite object constitutes 14, one be used for carrying out photometry and range finding, red eye 16, gate unit 17, and photographic lens tube 10 (see figure 7)s that the first lens group 10a is housed.On top surface, be provided with a release-push 11 and a gating flash mode button 12 (seeing Fig. 7 and 8).On side surface, be provided with an outside I/O terminal mounting portion 19 and frenulum retaining part 20 (see Fig. 9,10 etc.).On the bottom surface, the battery card that is provided with a tripod mounting portion 21 and a memory card driver that describes below of covering and a battery insertion portion covers 22 (see figure 10)s.On the rear surface, be provided with display that action button 24, one be made of LCD 25, zoom button 23, an and view finder eyepiece part 14a (seeing Figure 11).
By action button 24, from Photographing Mode for example, reproduction mode, and the moving picture photographing pattern be used for the selection of the operator scheme of digital camera.Display 25 is presented at the view data (seeing Figure 12) of storage in the storer 34 or the view data of reading from the memory card driver on screen, and also can show a plurality of photographic data items with scaled version on screen.
Figure 12 is a calcspar, the circuit structure of expression digital camera 15; Represent by identical Reference numeral with those identical parts of Fig. 7 to 11.
Control section by a CPU40, ROM39, and a RAM41 form.By a bus 38 be connected on this control section be release-push 11, action button 24, display 25, with the operation of slip lens cap 18 synchronously a power switch 45, storer 34, compression and expanded circuit 35, and memory card driver 36 of on/off.Be connected to and on the driving circuit 37 that is connected with control section by bus 38 be: a zoom motor-driven part 26 is used for driving a zoom motor 26a; One focuses on motor-driven part 28, is used for driving a focusing motor 28a; A shutter drive part 7; And aperture drive part 6.According to the signal from control section, driving circuit 37 drives photographic lens tube 10, focusing block 27, blade 3, and aperture blades 1.And, also be connected on the driving circuit 37 be a photometry part 13a, ranging unit 13b, one have image unit 42 such as the photoelectric transformer of CCD or CMOS, and gate unit 17, and driving circuit 37 is according to the driving from each ingredient of signal controlling of control section.Be connected on the outgoing side of image unit 42 is an analog signal processing circuit 31, A/D conversion portion 32, and digital signal processing circuit 33 that digital signal is outputed to storer 34.The ROM39 storage is used for controlling the program of above-mentioned functions ingredient, and the RAM41 storage is used for the necessary data of each control program.
As the digital camera 15 of above-mentioned structure in, when the user slip lens cap 18 when position shown in Figure 8 slides into position shown in Figure 7, the power switch 45 and its that have disconnected synchronously are switched on, and electric power supplies to each circuit.Then, CPU40 reads the necessary control program from ROM39, with the beginning initial operation.In other words, photographic lens tube 10 moves to the presumptive area (state as shown in Figure 7) that allows photograph, thereby makes camera be ready to take a picture.
When the user presses release-push 11 when taking a picture, the brightness of object is surveyed by photometry part 13a, and according to light value, determines aperture and shutter speed, and carries out about whether making the judgement of gate unit 17 flashes of light.And, using action button 24, the user can be in advance selects between the pressure flash of light of gate unit 17 and non-flash of light.And simultaneously, 13b finds range by ranging unit, and measures the distance to object, and with the calculating focus information, and according to focus information, focusing block 27 moves to predetermined focal position by driving circuit 37 and focusing motor-driven part 28.Secondly, realize the opening/closing of blade 3 by driving circuit 37 and shutter drive part 7, and pick up the image of hope by image unit 42.
Be accumulated in the corresponding electric charge of light quantity that is with allows based on exposure control value to enter in the image unit 42.This electric charge is converted to a picture signal, and this picture signal outputs to analog signal processing circuit 31.Before view data was outputed to A/ D conversion portion 32,31 pairs of view data of picking up of analog signal processing circuit were carried out simulation process.A/D conversion portion 32 converts the simulated data of taking in to numerical data, and this numerical data is outputed to digital signal processing circuit 33.33 pairs of numerical datas that are stored in the storer 34 of digital signal processing circuit are handled.
Be stored in numerical data (view data) in the storer 34 through the manipulation of action button 24 by compression and expanded circuit 35 through processing by compression, as JPEG or TIFF, and be stored in the memory card driver 36 on the outgoing side of circuit.Notice that under the situation of the digital camera that does not have storer 34, the view data of handling is being stored in before the memory card driver 36, is output to compression and expanded circuit 35 in digital signal processing circuit 33.
And, by the view data that is stored in the view data in the storer 34 or be stored in the memory card driver 36 is outputed to compression and expanded circuit 35, by compression and expanded circuit 35 realization extension process, and view data outputs to display 25 by bus 38, with display image.When just determining image when not required in case see image on display 25, the user can be by the manipulation deleted image data of action button 24.
As shown in figure 11, zoom button 23 is arranged on the rear surface of digital camera 15; When handling zoom button 23, through driving circuit 37 control zoom motor-driven part 26 and zoom motor 26a, and photographic lens tube 10 moves on the optical axis direction of camera lens.And, also might realize so-called digital zoom, the manipulation by zoom button 23 is amplified or is dwindled the memory image that is presented on the display 25.
Here, referring to figs. 1 through 4, will describe a kind of light amount control apparatus, this light amount control apparatus is arranged in the digital camera 15, and comprises a blade 3 or aperture blades 1 that is used for regulating the light quantity that arrives image unit 42.
Shown in Fig. 1 to 4, blade 3, dividing plate 2, and aperture blades 1 be included in the substrate 5, and finally keep by a shutter cover 4.At the rear side of substrate 5, maintain an aperture blades drive part 6 and a blade drive part 7 that is used for driving blade 3 that is used for driving aperture blades 1.
Be provided with the 5a that opens that a light will pass near the center of substrate 5, and blade 3 is included in the front side of opening 5a.Operate among the recessed space segment 5b that blade 3 can form on substrate 5, and dividing plate 2 is included in the front side of blade 3.Dividing plate 2 is installed on the flat surface part 5c of substrate 5.Basically in the center of dividing plate 2, be formed with the dividing plate opening 2b of the optical aperture of a definite digital camera 15.Dividing plate opening 2b has the little area of area of opening 5a than substrate.Aperture blades 1 is included in the front side of dividing plate 2, and whole by shutter cover 4 maintenances, so that do not throw off with substrate 5.Being formed in the aperture blades 1 is an aperture openings 1a, and aperture is opened 1a less than dividing plate opening 2b.
Fig. 2 and 3 is front views of light amount control apparatus.
Fig. 2 illustrates that aperture blades 1 has moved in the position on the dividing plate opening 2b, the state of aperture openings 1a on dividing plate opening 2b and base openings 5a.In this state, be arranged in the dividing plate 2 notch portion 2a from the front side as seen, and the aperture openings 1a of aperture blades 1 is not overlapping with notch portion 2a, but overlapping with dividing plate opening 2b.Under state shown in Figure 3, aperture blades 1 is withdrawn from dividing plate opening 2b.In this state, notch portion 2a and the aperture blades 1 that is arranged in the dividing plate 2 overlaps each other; The aperture openings 1a of aperture blades 1 is not overlapping with dividing plate opening 2b, but overlapping with notch portion 2a.
In this structure, under the state of dividing plate opening 2b and base openings 5a withdrawal, when for example being placed in the high humidity environment, the possibility that dewfall takes place is arranged between aperture blades 1 and dividing plate 2 when whole at as shown in Figure 3 aperture blades 1.Yet,,, make to reduce their contact forces separately owing to dewfall so might reduce contact area between dividing plate 2 and aperture blades 1 because notch portion 2a is arranged in the dividing plate 2.Thereby, even, also might drive aperture blades 1 reposefully being easy to produce in the adverse environment of dewfall.And, unlike the conventional example that shown in Figure 15 A and 15B, is provided with the projection that is used for reducing the friction between aperture blades and dividing plate, this embodiment adopts a kind of aperture blades 1 to carry out the structure that face supports by dividing plate 2, thus the worry that does not have aperture blades 1 to be bent.And, owing to do not have projection, and so the thickness that is occupied by dividing plate 2 is so littler, the feasible thickness that might reduce light amount control apparatus as a whole.
Should be noted that notch portion 2a only is provided with for the purpose that reduces the contact area between dividing plate 2 and aperture blades 1; Notch portion 2a is not intended for use passing through of any parts or inserts so that connect the parts that are arranged in dividing plate 2 either sides.And, to compare with the equitant state shown in Figure 2 of an aperture blades 1 and the part of notch portion 2a, the overlapping area between notch portion 2a and aperture blades 1 is bigger under state shown in Figure 3.
When the power supply of digital camera 15 was cut off, in other words, when not having drive signal to supply to light amount control apparatus, aperture blades 1 was in position as shown in Figure 3.What will present is that digital camera 15 is stayed under the off-position the most frequently.Therefore, make the overlapping area maximum of notch portion 2a and aperture blades 1, prevent that thus aperture blades 1 and dividing plate 2 are locked to each other.
Fig. 5 and 6 illustrates a kind of modification of this light amount control apparatus.The sort of difference shown in this light amount control apparatus and Fig. 1 to 4 only is that it is equipped with a dividing plate 52, rather than dividing plate 2.Dividing plate 52 has a plurality of notch portion 52a; Under the state on the base openings 5a, aperture blades 1 is not positioned on any notch portion 52a at the aperture openings 1a of aperture blades 1.By this way, be not limited to shown in Fig. 1 to 4 those in the shape and size of the notch portion that forms in the dividing plate, they also are not limited to as illustrated in Figures 5 and 6 those certainly.As long as realize purpose of the present invention, not about the restriction of the shape and size of the notch portion that in dividing plate, forms.
Secondly, with reference to the process flow diagram of Figure 13, the sequence of operations that the power supply of the digital camera 15 of above-mentioned light amount control apparatus is finished to photograph is housed with describing from connection.
When the user handles slip lens cap 18 when connecting the power switch 45 (#1) of digital camera 15, CPU 40 is to instruction of zoom motor-driven part 26 outputs, zoom motor 26a of (clockwise) rotation on the CW direction is so that stretch out the photographic lens tube 10 (#2) that is retracted in the retracted position.Then, when confirming the photograph location that photographic lens tube 10 has reached as shown in Figure 7, stop the driving (#3) of zoom motor 26a.
Secondly, when connecting release-push 11 (#4) by the user, carry out the photometry operation, obtaining information, and be calculated to the distance (#5) of object by a ranging unit 13b about object illumination by a photometry part 13a.Then, carry out whether showing that about the illuminance information that obtains illumination is higher than the judgement of predetermined luminous intensity; When it shows a higher illuminance (that is, when the answer in #6 is "Yes"), aperture blades 1 is placed in (see figure 2) in the optical axis, to change the amount (#7) that light passes through.On the other hand, and when the illuminance information that obtains shows that illumination is lower than predetermined luminous intensity (, when the answer in #6 is "No"), aperture blades 1 is not operated, and stays from the position (see figure 3) of optical axis withdrawal.
After this, drive a focusing motor 28a by focusing on motor-driven part 28, with operation focusing block 27, and according to the focus information driving photographic lens tube 10 that obtains from object distance, photographic lens is moved to the focal position (#8) of object, begin shooting (#9) herein.Secondly, blade 3 moves to off-position (#10) from open position, with the light quantity that blocking is passed through, finishes shooting (#11) thus.After this, aperture blades 1 is from optical axis withdrawal (#12), and focusing block 27 moves to initial position (#13), to finish this series operation.
Secondly, with reference to the process flow diagram of Figure 14, with the operation of describing when the user disconnects the power switch 45 of digital camera 15.
When the user disconnected the power switch 45 (#11) of digital camera 15, blade 3 at first moved to off-position (#12).Then, aperture blades 1 begins to move to the retracted position (see figure 3); When confirming that aperture blades 1 has moved to a precalculated position (#13), zoom motor 26a is by (on the CCW direction) rotation (#14) counterclockwise, and photographic lens tube 10 is withdrawn into a precalculated position (retracted position shown in Figure 7) (#15), finishes the operation when disconnecting power switch 45 thus.
By this way, in the light amount control apparatus of this embodiment, blade 3 and aperture blades 1 are arranged in the substrate 5, and dividing plate 2 is arranged between these two blades.Notch portion 2a is arranged on such position, make the aperture blades 1 of notch portion 2a and dividing plate 2 overlapping, and aperture blades 1 is withdrawn from dividing plate opening 2b.Thereby, even under the situation of high humility, also might reduce dividing plate 2 and aperture blades are remained on each other power in closely contacting.In other words, () size or increase power to increase its torque, also needn't add any professional component in other words, drive part 6 or driving circuit 37 needn't to increase the actuator that is used for driving aperture blades 1.Thereby even be placed under the disadvantageous condition when the digital camera 15 that be equipped with by the light amount control apparatus of above-mentioned structure, and dewfall etc. also can be operated aperture blades 1 when taking place reposefully.
When camera time spent not, aperture blades 1 remains under the open mode, and the notch portion 2b of dividing plate 2 and aperture blades 1 are overlapping.Thereby, even under high humidity, also reduced dividing plate 2 and aperture blades 1 are remained on each other power in closely contacting, thereby in the time will driving aperture blades 1, can operate aperture blades 1 reposefully.
And, the notch portion 2b of dividing plate 2 can be arranged on such position, thereby when blade 3 is shown in an open position, notch portion 2b and shutter position are overlapping (when blade 3 places in the closed position, blade 3 and dividing plate opening 2b overlap each other, thereby are not easy to take place dewfall between blade 3 and dividing plate 2).Even under high humidity, also reduced dividing plate 2 and blade 3 are remained on each other power in closely contact, feasiblely might operate blade 3 reposefully.
Revise
Though above embodiment is applied to a kind of digital camera, but the present invention also is applicable to the video camera of the similar light amount control apparatus that same configuration is housed or uses the analog camera of silver halide film etc., even when dewfall, also make and to operate aperture blades reposefully.
The application requires the Japanese patent application No.2004-221091 that submits on July 29th, 2004 and the right of priority of the Japanese patent application No.2005-186011 that submits on June 27th, 2005, and the content of these patented claims all is contained in this, for your guidance.
Claims (16)
1. light amount control apparatus that is used in the camera head, this light amount control apparatus comprises:
Substrate, it has an opening;
Blade part can comprise that blade part moves on optical axis direction with in the scope of opening position overlapped, be used for by and light quantity restricted passage opening overlapping with opening; And
Plate member, it is adjacent with blade part, and under the state of blade part in the pre-position, along optical axis direction and blade part position overlapped place, has a notch portion in plate member.
2. light amount control apparatus as claimed in claim 1, wherein, the precalculated position of blade part is the position of the light quantity of not restricted passage of blade part opening.
3. light amount control apparatus as claimed in claim 1, wherein, be at blade part under the state of position of light quantity of not restricted passage of blade part opening, the lap of blade part and notch portion is greater than the lap under the state of the position of the light quantity that is in blade part restricted passage opening at blade part.
4. light amount control apparatus as claimed in claim 1 wherein, is at blade part under the state of position of light quantity of not restricted passage of blade part opening, and it is maximum that the lap of blade part and notch portion becomes.
5. light amount control apparatus as claimed in claim 1 wherein, is not having drive signal to be provided under the state of light amount control apparatus, and it is maximum that the lap of blade part and notch portion becomes.
6. light amount control apparatus as claimed in claim 1, wherein, blade part is that an aperture blades that is used for reducing the light quantity by opening and one are used for interdicting at least one in the blade of the light by opening.
7. light amount control apparatus as claimed in claim 1, wherein, blade part is an aperture blades that is used for reducing by the light quantity of opening; Plate member is to be arranged in aperture blades and one to be used for interdicting a dividing plate between the blade of the light by opening.
8. light amount control apparatus as claimed in claim 1, wherein, blade part and plate member have the apparent surface who is formed by flat surface; Plate member has notch portion in the part of the flat surface of plate member.
9. camera head, wherein, the light quantity that arrives a shooting part is controlled by a light amount control apparatus, and this camera head comprises:
Substrate, it has an opening;
Blade part can comprise that blade part moves on optical axis direction with in the scope of opening position overlapped, be used for by and light quantity restricted passage opening overlapping with opening; And plate member, it is adjacent with blade part, and is at blade part under the state in precalculated position, along optical axis direction and blade part position overlapped place, has a notch portion in plate member.
10. camera head as claimed in claim 9, wherein, the precalculated position of blade part is the position of the light quantity of not restricted passage of blade part opening.
11. camera head as claimed in claim 9, wherein, be at blade part under the state of position of light quantity of not restricted passage of blade part opening, the lap of blade part and notch portion is bigger than the lap under the state of the position of the light quantity that is in blade part restricted passage opening at blade part.
12. camera head as claimed in claim 9 wherein, is at blade part under the state of position of light quantity of not restricted passage of blade part opening, it is maximum that the lap of blade part and notch portion becomes.
13. camera head as claimed in claim 9, wherein, under the state that the power supply of camera head is disconnected, it is maximum that the lap of blade part and notch portion becomes.
14. camera head as claimed in claim 9, wherein, blade part is that an aperture blades that is used for reducing the light quantity by opening and one are used for interdicting at least one in the blade of the light by opening.
15. camera head as claimed in claim 9, wherein, blade part is an aperture blades that is used for reducing by the light quantity of opening; Plate member is to be arranged in aperture blades and one to be used for interdicting a dividing plate between the blade of the light by opening.
16. camera head as claimed in claim 9, wherein, blade part and plate member have the apparent surface who is formed by flat surface; Plate member has notch portion in the part of the flat surface of plate member.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004221091 | 2004-07-29 | ||
| JP2004-221091 | 2004-07-29 | ||
| JP2004221091 | 2004-07-29 | ||
| JP2005-186011 | 2005-06-27 | ||
| JP2005186011 | 2005-06-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1727981A true CN1727981A (en) | 2006-02-01 |
| CN100432823C CN100432823C (en) | 2008-11-12 |
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ID=35927329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100887317A Expired - Fee Related CN100432823C (en) | 2004-07-29 | 2005-07-29 | Light amount adjusting apparatus and image pickup apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100432823C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7771132B2 (en) | 2006-08-04 | 2010-08-10 | Tamron Co., Ltd. | Shutter unit, shutter unit with built-in lens, and imaging apparatus |
| CN101226265B (en) * | 2007-01-18 | 2010-08-18 | 佳能株式会社 | Lens barrel and image-pickup apparatus |
| CN102741741A (en) * | 2008-06-30 | 2012-10-17 | 精工精密株式会社 | Light amount adjusting device and optical device |
| CN101755235B (en) * | 2007-06-29 | 2013-01-16 | 日本电产科宝株式会社 | Camera blade driving device |
| CN103207497A (en) * | 2011-12-02 | 2013-07-17 | 磁化电子株式会社 | Shutter device for camera |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5365298A (en) * | 1993-04-05 | 1994-11-15 | Eastman Kodak Company | Camera shutter with oscillation damping |
| JP3983859B2 (en) * | 1997-10-09 | 2007-09-26 | オリンパス株式会社 | Lens shutter device |
| JP4200408B2 (en) * | 1999-10-21 | 2008-12-24 | ソニー株式会社 | Imaging device |
| JP2004177693A (en) * | 2002-11-27 | 2004-06-24 | Olympus Corp | Optical device and camera |
-
2005
- 2005-07-29 CN CNB2005100887317A patent/CN100432823C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7771132B2 (en) | 2006-08-04 | 2010-08-10 | Tamron Co., Ltd. | Shutter unit, shutter unit with built-in lens, and imaging apparatus |
| CN101226265B (en) * | 2007-01-18 | 2010-08-18 | 佳能株式会社 | Lens barrel and image-pickup apparatus |
| CN101755235B (en) * | 2007-06-29 | 2013-01-16 | 日本电产科宝株式会社 | Camera blade driving device |
| CN102741741A (en) * | 2008-06-30 | 2012-10-17 | 精工精密株式会社 | Light amount adjusting device and optical device |
| CN102741741B (en) * | 2008-06-30 | 2016-01-20 | 精工精密株式会社 | Light amount control apparatus and optical devices |
| CN103207497A (en) * | 2011-12-02 | 2013-07-17 | 磁化电子株式会社 | Shutter device for camera |
| CN103207497B (en) * | 2011-12-02 | 2016-05-18 | 磁化电子株式会社 | Video camera shutter device |
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| Publication number | Publication date |
|---|---|
| CN100432823C (en) | 2008-11-12 |
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