WO2012026104A1 - 光量調節装置および光学機器 - Google Patents
光量調節装置および光学機器 Download PDFInfo
- Publication number
- WO2012026104A1 WO2012026104A1 PCT/JP2011/004649 JP2011004649W WO2012026104A1 WO 2012026104 A1 WO2012026104 A1 WO 2012026104A1 JP 2011004649 W JP2011004649 W JP 2011004649W WO 2012026104 A1 WO2012026104 A1 WO 2012026104A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- diaphragm
- blade
- opening
- drive
- base member
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
- G03B7/081—Analogue circuits
- G03B7/085—Analogue circuits for control of aperture
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/02—Diaphragms
- G03B9/06—Two or more co-operating pivoted blades, e.g. iris type
Definitions
- the present invention relates to a light amount adjustment device mounted on an optical device such as a camera or an interchangeable lens and also referred to as an aperture device or the like.
- the performance of the above-described light quantity adjustment device affects the image quality of the image captured using the optical device, and in particular, the shape of the diaphragm opening through which light actually passes formed by the diaphragm blade (diaphragm).
- the shape of the aperture changes the shape of so-called blur or ghost. That is, if the aperture shape is close to a circle, the shape of the blur or ghost will be circular, and natural image quality can be obtained. However, if the aperture shape is a square or flat shape which is largely different from a circle, the blur or The ghost appears with the same shape as that, resulting in an unnatural image quality.
- Patent Document 1 discloses an iris diaphragm device that rotates an annular drive ring around a diaphragm opening to rotate a large number of diaphragm blades to form a polygonal diaphragm opening shape that is closer to a circle than a square. Is disclosed.
- Patent Document 2 discloses a combination of a pair of rectilinearly moving straight-aperture blades and a pair of oscillating (actuating) swinging diaphragm blades to form an aperture shape of a polygonal aperture closer to a circle than a square. An apparatus is disclosed.
- the drive ring is disposed around the diaphragm opening, and a retraction space for a large number of diaphragm blades is required in the entire circumferential direction.
- the size in the width direction orthogonal to the rectilinear direction of the rectilinear iris blade can be suppressed.
- the ring plate corresponding to the drive ring disposed around the diaphragm opening is rotated to drive the pair of straight-aperture diaphragm blades and the pair of oscillating diaphragm blades.
- the present invention provides a light amount adjustment device capable of achieving downsizing of the device while obtaining a good aperture opening shape, and an optical apparatus provided with the same.
- a light quantity adjustment device (a first light quantity adjustment device) according to one aspect of the present invention includes a base member having an opening through which light passes and a movement in a direction orthogonal to the light passing direction with respect to the base member.
- a first diaphragm blade advancing and retracting, a second diaphragm blade rotating in a plane perpendicular to the light passing direction with respect to the base member and advancing and retracting to the opening, and the first diaphragm blade attached to the base member;
- a drive unit for driving the second diaphragm blade.
- the base member has a projection engaged with a groove formed in the first diaphragm blade to guide the first diaphragm blade in its moving direction. Then, the second diaphragm blade is characterized in that it rotates in the above plane about the projection.
- a light quantity adjustment device moves in a direction perpendicular to the light passing direction with respect to the base member having an opening through which light passes and the base member.
- a first diaphragm blade advancing and retracting to the opening, a second diaphragm blade rotating with respect to the base member in a plane orthogonal to the light passing direction, and advancing and retracting to the opening;
- a drive unit attached to the member; and a drive lever which is rotated by the drive unit around an axis located away from the opening in a direction perpendicular to the light passing direction to drive the first and second diaphragm blades together.
- the first and second diaphragm blades are characterized in that they are driven by being engaged with the same transmission part provided in the drive lever.
- the light quantity adjustment device (third light quantity adjustment device) as another aspect of the present invention is pivoted by a base member having an opening through which light passes, a drive unit attached to the base member, and a drive unit And a first diaphragm blade and a second diaphragm blade which are driven by the drive lever and engaged with a transmission part provided on the drive lever and moved back and forth with respect to the opening.
- the first diaphragm blade has a first engagement portion rotatably engaged with the transmission portion, and a second engagement portion slidably engaged with a guide portion provided on the base member.
- the second diaphragm blade includes a third engagement portion slidably engaged with the transmission portion, and a fourth engagement portion rotatably engaged with the rotation center portion provided on the base member.
- the first diaphragm blade is driven so as to move in a direction perpendicular to the light passing direction and to rotate about the transmitting portion engaged with the first engaging portion, and the second diaphragm blade is configured to It is characterized in that it is driven to rotate in a plane orthogonal to the light passing direction about a rotation center portion provided on the base member engaged with the engagement portion 4.
- At least one of the first and second diaphragm blades may form an open diaphragm opening inside the opening of the base member in the open diaphragm state.
- an optical apparatus provided with each of the above-described light amount adjustment devices also constitutes another aspect of the present invention.
- the combination of the first diaphragm blade moving in the direction orthogonal to the light passing direction and the second diaphragm blade rotating in the plane orthogonal to the light passing direction is preferable. It is possible to form an iris aperture of any shape. Moreover, by using the shaft portion provided on the base member to guide the first diaphragm blade also as a rotation center of the second diaphragm blade, the degree of freedom of the diaphragm blade and the base member can be increased. It is possible to easily miniaturize the throttling device.
- a combination of a first diaphragm blade moving in a direction orthogonal to the light passing direction and a second diaphragm blade rotating in a plane orthogonal to the light passing direction Can form a diaphragm opening of a good shape.
- members such as a drive ring around the diaphragm opening. The overall size of the device can be reduced compared to a configuration in which the
- the combination of the first diaphragm blade moving in the direction orthogonal to the light passing direction and the second diaphragm blade rotating in the plane orthogonal to the light passing direction is preferable.
- a shaped stop can be formed.
- the first diaphragm blade by configuring the first diaphragm blade to rotate around the transmission portion while moving in the direction orthogonal to the light passing direction, the first diaphragm blade does not rotate, and the direction orthogonal to the light passing direction
- the device can be easily miniaturized as compared with the case of moving to the upper position, which is effective in miniaturizing an optical device on which the device is mounted.
- FIG. 1 is an exploded perspective view of a throttling device that is Embodiment 1 of the present invention.
- FIG. 2 is a front view of the diaphragm device of Embodiment 1.
- FIG. 1 is a perspective view of a diaphragm device of Embodiment 1.
- FIG. 2 is a front view of a linear diaphragm blade used in the diaphragm device of Embodiment 1.
- FIG. 2 is a front view of a rotary diaphragm blade used in the diaphragm device of Embodiment 1.
- FIG. 2 is a front view showing a diaphragm opening shape formed by the diaphragm device of the first embodiment.
- FIG. 1 is an exploded perspective view of a throttling device that is Embodiment 1 of the present invention.
- FIG. 2 is a front view of the diaphragm device of Embodiment 1.
- FIG. 1 is a perspective view of a diaphra
- FIG. 7 is an exploded perspective view of a diaphragm device which is Embodiment 2 of the present invention.
- FIG. 9 is an exploded perspective view of a diaphragm device which is Embodiment 3 of the present invention.
- FIG. 10 is an exploded perspective view of a diaphragm device that is Embodiment 4 of the present invention.
- FIG. 14 is a front view of the diaphragm device of Example 4;
- FIG. 14 is a perspective view of a diaphragm device of Embodiment 4.
- FIG. 16 is a front view of a linear diaphragm blade used in the diaphragm device of Embodiment 4.
- FIG. 16 is a front view of a rotary diaphragm blade used in the diaphragm device of Embodiment 4.
- FIG. 16 is a front view showing a diaphragm opening shape formed by the diaphragm device of the fourth embodiment.
- FIG. 10 is an exploded perspective view of an iris device that is Embodiment 5 of the present invention.
- FIG. 10 is an exploded perspective view of an iris device that is Embodiment 6 of the present invention.
- FIG. 16 is a front view of the diaphragm device of Example 6;
- FIG. 16 is a perspective view of a diaphragm device of a sixth embodiment.
- FIG. 16 is a front view of a linear diaphragm blade used in the diaphragm device of Example 6.
- FIG. 16 is a front view of a rotary diaphragm blade used in the diaphragm device of Embodiment 6.
- FIG. 16 is a front view showing a diaphragm opening shape formed by the diaphragm device of Example 6;
- FIG. 10 is an exploded perspective view of an iris device that is Embodiment 7 of the present invention.
- FIG. 14 is a schematic view of an optical apparatus according to an eighth embodiment of the present invention equipped with the diaphragm device of the first to seventh embodiments.
- FIG. 1 is an exploded view of a diaphragm device as a light amount adjustment device (a first light amount adjustment device and a second light amount adjustment device) according to a first embodiment of the present invention.
- FIG. 2 shows the diaphragm device as viewed from the direction (optical axis direction) in which light passes through the diaphragm aperture formed by the diaphragm blades 4 to 9.
- FIG. 2 shows a state in which the cover plate 10 shown in FIG. 1 is removed.
- FIG. 3 shows the diaphragm shown in FIG. 2 as viewed obliquely.
- the vertical direction of the diaphragm device corresponds to the "direction orthogonal to the light passing direction", which is referred to as the optical axis orthogonal direction in the following description.
- the lateral direction of the diaphragm device in these figures is referred to as the width direction.
- a fixed opening 2b through which light passes is formed in a base plate 2 as a base member.
- the ground plate 2 is manufactured by press processing, resin molding, or the like.
- a diaphragm driving unit 1 is attached to a position of the outer surface (one surface in the optical axis direction) of the base plate 2 which is spaced downward from the fixed opening 2b.
- the diaphragm drive unit 1 is, for example, an electromagnetic drive that includes a rotor magnet (not shown), an output shaft 1a that rotates integrally with the rotor magnet, and a coil (not shown) that generates a magnetic force that rotates the rotor magnet. It is a motor. Also, it may be a stepping motor.
- the output shaft 1 a of the diaphragm drive unit 1 penetrates the base plate 2 and protrudes to the inner surface side of the base plate 2.
- a drive arm 3 as a drive lever is attached to the output shaft 1a by press fitting.
- the drive arm 3 pivots within a predetermined angular range with the output shaft 1a around an axis located downward from the fixed opening 2b.
- the drive arm 3 is manufactured by resin molding or the like. In addition, it is also possible to integrally form the output shaft 1a and the drive arm 3.
- the drive arm 3 has blade drive pins 3i and 3j as transmission parts for driving the diaphragm blades 4 to 9 at the tips on both sides of the position of the output shaft 1a.
- the blade drive pin 3i is engaged with three diaphragm blades of the rotary diaphragm blade 6, the linear diaphragm blade 7 and the rotary diaphragm blade 8.
- the blade drive pin 3 j is engaged with three diaphragm blades of the linear diaphragm blade 4, the rotary diaphragm blade 5 and the rotary diaphragm blade 9.
- the diaphragm drive unit 1 and the drive arm 3 are disposed on the outer surface side of the base plate 2, and the blade drive pins 3i and 3j formed on the drive arm 3 penetrate the base plate 2 and project the blade drive pins 3i and 3j to the inner surface side of the base plate 2. You may do so.
- two blade drive pins 3i and 3j are provided on one drive arm 3 directly attached to (or integrally formed with) the output shaft 1a of the diaphragm drive unit 1 and identical (common)
- One linear diaphragm blade (first diaphragm blade) 7 and two rotary diaphragm blades (second diaphragm blades) 6 and 8 are engaged with the blade drive pin 3i.
- the two linear diaphragm blades 4 and 7 can be obtained. It is moved in the direction orthogonal to the optical axis, and the four rotary diaphragm blades 5, 6, 8, 9 are rotated in a plane perpendicular to the optical axis (hereinafter referred to as an optical axis orthogonal plane). As a result, these six diaphragm blades 4 to 9 form a polygonal diaphragm aperture close to a circular shape and change its size (diameter).
- movement of the linear diaphragm blades 4 and 7 in the direction orthogonal to the optical axis not only means that the linear diaphragm blades 4 and 7 move straight (parallel movement) in the direction orthogonal to the optical axis but also swings or shifts in the width direction It also includes the case of moving in the direction orthogonal to the optical axis while moving.
- An arm cover 11 is disposed between the drive arm 3 and the diaphragm blade 4 ( ⁇ 9) to prevent unnecessary contact between the drive arm 3 and the diaphragm blade 4 ( ⁇ 9).
- the arm cover 11 is manufactured by press processing, resin molding or the like. When there is a sufficient clearance between the drive arm 3 and the diaphragm blade 4, the arm cover 11 may be omitted.
- the cover plate 10 is attached to the main plate 2 so as to form a space in which the diaphragm blades 4 to 9 move with the main plate 2.
- the cover plate 10 has an opening 10 b corresponding to the fixed opening 2 b formed in the ground plate 2.
- the cover plate 10 is manufactured by press processing, resin molding or the like.
- a rail (not shown) for reducing the sliding resistance with the diaphragm blades 4 to 9 is formed.
- the diameter of the diaphragm opening can be changed by rotating the drive arm 3 as described above, and furthermore, the diaphragm opening can be completely closed (completely closed). Therefore, the diaphragm device of this embodiment can also perform the shutter operation. That is, the diaphragm device of this embodiment can also be used as a diaphragm shutter device.
- the linear diaphragm blade 4 is slidably engaged with the blade drive pin 3j of the drive arm 3 at the drive long hole 4j formed at the lower end thereof. Further, in the guide long hole portions (also referred to as guide groove portions) 4c and 4d formed in the linear stop blade 4 so as to extend in the direction orthogonal to the optical axis, shaft portions (pin portions) as protrusions formed on the base plate 2 (Also referred to as bosses) 2c, 2d are engaged slidably.
- the long hole 4f has a relief shape avoiding the shaft 2f formed in the base plate 2.
- the linear diaphragm blade 4 When the drive arm 3 is rotated within the above-described predetermined angle range, the linear diaphragm blade 4 receives the driving force from the blade drive pin 3j at the drive long hole 4j as shown in FIG. , 4d move in the direction orthogonal to the optical axis while being guided by the shaft portions 2c, 2d, respectively.
- the linear diaphragm blade 7 is slidably engaged with the blade drive pin 3i of the drive arm 3 at a drive long hole 7i formed at the lower end thereof. Further, in the guide long hole portions (also referred to as guide groove portions) 7f and 7e formed in the linear stop blade 7 so as to extend in the direction orthogonal to the optical axis, they are formed in the shaft portion 2f of the ground plate 2 and the ground plate 2 as described above. A shaft portion (also referred to as a pin portion or a boss portion) 2 e as a projection is slidably engaged.
- the long hole portion 7 c has a relief shape in which the shaft portion 2 c of the main plate 2 is avoided.
- the linear diaphragm blade 7 receives the driving force from the blade drive pin 3i in the drive long hole 7i as shown in FIG. , 7f move in the direction orthogonal to the optical axis while being guided by the shaft portions 2e, 2f, respectively.
- the rotary diaphragm blade 5 is slidably engaged with the blade drive pin 3j of the drive arm 3 in the drive cam groove 5j formed in the lower part thereof. Further, a shaft portion 2 d as a rotation center portion (rotation center shaft portion) formed in the base plate 2 is rotatably engaged with the rotation center hole portion 5 d formed in the rotation diaphragm blade 5.
- the shaft portion 2d not only has a function of slidably engaging with the guide elongated hole portion 4d of the linear diaphragm blade 4 as described above to guide the linear diaphragm blade 4 in the moving direction, but also the rotary diaphragm blade It also has a function of engaging with the rotation center hole 5 d of 5 and forming the rotation center of the rotation diaphragm blade 5.
- the rotary diaphragm blade 6 is slidably engaged with the blade drive pin 3i of the drive arm 3 in the drive cam groove 6i formed in the lower part thereof. Further, a shaft portion 2 e as a rotation center portion (rotation center axis portion) formed in the base plate 2 is rotatably engaged with a rotation center hole portion 6 e formed in the rotation diaphragm blade 6.
- the shaft portion 2e not only has a function of slidably engaging with the guide elongated hole portion 7e of the linear diaphragm blade 7 as described above to guide the linear diaphragm blade 7 in the moving direction, but also the rotary diaphragm blade It also has a function of engaging with the rotation center hole 6 e of 6 and forming the rotation center of the rotation diaphragm blade 6.
- the drive cam groove portions 5j and 6i receive driving force from the blade drive pins 3j and 3i, and the rotation center It rotates (turns) in the optical axis orthogonal plane centering on the shaft parts 2d and 2e engaged with the holes 5d and 6e.
- the speed of rotation can be adjusted by the shapes of the drive cam grooves 5j and 6i.
- the rotary diaphragm blade 8 and the rotary diaphragm blade 9 are slidably engaged with the blade drive pins 3i and 3j of the drive arm 3 at the drive cam groove portions 8i and 9j formed at the lower end portions thereof, respectively.
- Shafts 2d and 2e as a rotation center (rotation center axis) formed on the main plate 2 are rotatably engaged with the rotation center holes 8d and 9e formed on the rotation diaphragm blades 8 and 9, respectively. There is.
- the shaft portions 2d and 2e slidably engage with the guide elongated holes 4d and 7e of the linear diaphragm blades 4 and 7 to guide the linear diaphragm blades 4 and 7 in the moving direction thereof.
- it also has a function of engaging with the rotation center holes 8d and 9e of the rotation diaphragm blades 8 and 9 to form the rotation centers of the rotation diaphragm blades 8 and 9.
- the rotary cam blades 8i and 9j receive the driving force from the blade drive pins 3i and 3j, respectively. It rotates (turns) in the optical axis orthogonal plane centering on the shaft parts 2d and 2e engaged with the central holes 8d and 9e. The speed of rotation can be adjusted by the shape of the drive cam grooves 8i and 9j.
- the rotational position of the rotary diaphragm blades 5, 6, 8, 9 with respect to the rotational position of the drive arm 3, that is, the shape of the diaphragm opening, is a drive cam formed on each of the rotary diaphragm blades 5, 6, 8, 9 It can set suitably by adjusting the shape of groove part 5j, 6i, 8i, 9j.
- a stop can be formed.
- the aperture has a substantially regular hexagonal shape close to a circle, except an open aperture which is circular.
- the stop device of the present embodiment can be closed as shown on the upper left side of FIG.
- the linear diaphragm blades 4 and 7 and the rotary diaphragm blades 5, 6, 8, and 9 are used without using parts that rotate around the diaphragm opening, such as a drive ring.
- the two drive arms 3 are rotated to move or rotate. Therefore, the diaphragm device can be miniaturized in the longitudinal direction (the optical axis orthogonal direction) and the width direction, and the thickness in the optical axis direction can be further reduced.
- the shaft portions 2d and 2e and the blade drive pins 3i and 3j are one of the moving directions of the linear diaphragm blades 4 and 7 with respect to the fixed opening 2b (or the diaphragm opening).
- the shaft portions 2d and 2e and the blade drive pins 3i and 3j are one of the moving directions of the linear diaphragm blades 4 and 7 with respect to the fixed opening 2b (or the diaphragm opening).
- the shape and structure of the opposite side (upper side in each drawing) to the fixed opening 2b in the ground plane 2 can be simplified, and in particular, the upper part of the throttle device can be miniaturized correspondingly. .
- FIG. 7 is an exploded view of a diaphragm apparatus (a first light quantity adjustment apparatus and a second light quantity adjustment apparatus) according to a second embodiment of the present invention.
- the diaphragm apparatus of this embodiment is provided with an ND filter 12 for attenuating the amount of light passing through the diaphragm aperture so as to be capable of advancing and retracting with respect to the diaphragm aperture shown in FIG.
- the same components as those shown in FIG. 1 will be assigned the same reference numerals as those in FIG.
- Reference numeral 13 denotes an ND holding plate for holding the ND filter 12.
- the ND holding plate 13 is disposed on the opposite side to the diaphragm blades 4 to 9 across the cover plate 10.
- An outer cover plate 14 forms a space for moving the ND holding plate 13 between itself and the cover plate 10 and is attached to the ground plate 2.
- the sub ground plate 16 to which the ND driving unit 17 is fixed is attached to the outer cover plate 14.
- the ND drive unit 17 includes a rotor magnet (not shown), an output shaft (not shown) that rotates integrally with the rotor magnet, and a coil (not shown) that generates a magnetic force that rotates the rotor magnet when it is energized. It is an electromagnetic drive motor. It may also be a stepping motor.
- An ND arm 15 is press-fit and attached to the output shaft of the ND drive unit 17 (it may be integrally formed), and a drive pin 15a is provided at the tip of the ND arm 15.
- the drive pin 15 a penetrates the outer cover plate 14 and engages with the drive long hole 13 a formed in the lower end portion of the ND holding plate 13. Further, shaft portions 2c and 2d formed on the base plate 2 are slidably engaged with guide long hole portions 13c and 13d formed in the ND holding plate 13 so as to extend in a direction orthogonal to the optical axis. .
- the ND holding plate 13 When the ND arm 15 is rotated by the ND driving unit 17, the ND holding plate 13 receives the driving force from the driving pin 15a in the driving long hole 13a, and the guide long holes 13c and 13d have the shaft 2c, respectively. It moves in the optical axis orthogonal direction while being guided by 2d. As a result, the ND filter 12 advances and retracts with respect to the aperture.
- the ND holding plate 13 may be configured to be moved in the optical axis orthogonal direction while swinging, as in the case of the linear stop blades 4 and 7.
- the configuration described in the first embodiment can be applied to the stop device provided with the ND filter.
- the light amount can be reduced without narrowing the diaphragm aperture too much, so it is possible to avoid the deterioration of the image quality due to so-called small aperture diffraction.
- the shapes of ghosts and blurs can also be made close to a circle, it is possible to obtain an image of more natural image quality.
- FIG. 8 is an exploded view of a diaphragm apparatus as a diaphragm apparatus (first light amount adjustment apparatus) according to a third embodiment of the present invention.
- the basic configuration of the stop device of the present embodiment is the same as that of the first embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals as the first embodiment, and the description thereof will be replaced.
- the linear diaphragm blade 7 and the two rotary diaphragm blades 6 and 8 are engaged with the same blade drive pin 3i of the drive arm 3, and the linear diaphragm blade 4 with the other same blade drive pin 3j.
- the drive arm 3 is provided with the first blade drive pins 3i 'and 3j' and the second blade drive pins 3i and 3j.
- the first blade drive pin 3i ' is slidably engaged with the drive elongated hole 7i' formed at the lower end of the linear diaphragm blade 7 at a position shifted inward in the width direction of the first embodiment.
- the second blade drive pin 3i is slidably engaged with the drive cam grooves 6i and 8i of the rotary diaphragm blades 6 and 8, respectively.
- the first blade drive pin 3 j ′ is slidably engaged with the drive elongated hole 4 i ′ formed at the lower end of the linear diaphragm blade 4 at a position shifted inward in the width direction of the first embodiment.
- the second blade drive pin 3j is slidably engaged with the drive cam grooves 5i and 9i of the rotary diaphragm blades 5 and 9.
- the two linear diaphragm blades 4 and 7 are moved in the direction orthogonal to the optical axis, and the four rotary diaphragm blades 5, 6, 8 and 9 are separated. It can be rotated in a plane orthogonal to the optical axis, and these six diaphragm blades 4 to 9 can form a polygonal circular diaphragm aperture and change its size (diameter).
- the ND filter may be provided to be able to advance and retract with respect to the aperture.
- FIG. 9 is an exploded view of a diaphragm as a light amount adjustment device (first and second light amount adjustment devices) according to a fourth embodiment of the present invention.
- FIG. 10 shows the diaphragm device as viewed from the direction (optical axis direction) in which light passes through the diaphragm aperture formed by the diaphragm blades 4 to 9.
- FIG. 10 shows a state in which the cover plate 10 shown in FIG. 9 is removed.
- the left view of FIG. 10 shows an intermediate stop state.
- the right figure of FIG. 10 shows the state of the open diaphragm (maximum diaphragm aperture).
- FIG. 11 shows the diaphragm device from which the cover plate 10 is removed, as viewed obliquely.
- the basic configuration of the stop device of the present embodiment is the same as that of the first embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals as the first embodiment, and the description thereof will be replaced.
- the present embodiment differs from the first embodiment in the shape of the linear diaphragm blade 7.
- two blade drive pins 3i and 3j are provided on the drive arm 3 as in the first embodiment, and one linear diaphragm blade (first diaphragm blade) 7 and the same blade drive pin 3i are provided.
- Two rotating diaphragm blades (second diaphragm blades) 6 and 8 are engaged.
- one linear diaphragm blade (first diaphragm blade) 4 and two rotary diaphragm blades (second diaphragm blades) 5 and 9 are engaged with another identical blade drive pin 3j.
- the linear diaphragm blade 7 has a circular opening for forming an open diaphragm opening inside the fixed opening 2b of the base plate 2 in the open diaphragm state. 7b is formed.
- the diameter of the opening 7 b is smaller than that of the fixed opening 2 b.
- the diaphragm blade a light shielding sheet metal or a plastic material processed into a shape for forming the diaphragm opening is used, but at least 0.2 to ensure strength and light shielding performance. A thickness of about 0.3 mm is required.
- the diaphragm blade can also be disposed in the space in the small photographing lens Therefore, thinning is required. Therefore, the diaphragm blade formed of a sheet metal plate or a plastic material can not meet this requirement in terms of the strength and the light shielding property. Even with a thickness of about 0.2 to 0.3 mm, ghosts and flares occur due to reflection at the edge of the diaphragm blade.
- the inner periphery of a thin plate which thins only the area around the opening of the diaphragm blade, chamfers the end edge of the opening, or forms the opening. It is also conceivable to prevent ghost / flare while thinning the diaphragm blade by performing surface treatment to suppress light reflection on the surface. However, even such a diaphragm blade needs a certain thickness in order to maintain the strength of the diaphragm blade, so there is a limit to thinning and downsizing as a diaphragm device.
- the linear aperture blade 7 which is one of the aperture blades forming the variable aperture, has the aperture 7b forming the open aperture (that is, it also serves as a fixed aperture). It is possible to eliminate the fixed throttling member that determines the reference diameter, and as a result, it is possible to make the throttling device thinner and smaller. Moreover, since the edge of the opening can be thinned, it is effective in reducing ghost / flare.
- the drive ring disposed around the aperture opening is rotated, and the size of the aperture device is smaller than when the linear aperture blades and rotary aperture blades are driven by different drive shafts in the drive ring. It is possible to form an aperture with a good shape although it is advantageous for
- the open diaphragm opening is formed inside the fixed opening 2b of the base plate 2 by the linear diaphragm blade 7
- the open diaphragm opening is formed by any of the other diaphragm blades 4 to 6, 8 and 9.
- the aperture stop may be formed by a plurality of aperture blades. That is, the open diaphragm opening may be formed by at least one of the linear diaphragm blades 4 and 7 and the rotary diaphragm blades 5 6 8 9.
- a circular aperture corresponding to the open diaphragm aperture may be formed in the linear diaphragm blade 4.
- the linear diaphragm blade 4 when the drive arm 3 is rotated within a predetermined angle range, as shown in FIG. 12, the linear diaphragm blade 4 is driven from the blade drive pin 3j by the drive elongated hole 4j. Under the force, the guide elongated holes 4c and 4d move in the direction orthogonal to the optical axis while being guided by the shafts 2c and 2d, respectively. Further, the linear diaphragm blade 7 receives driving force from the blade drive pin 3i in the driving long hole 7i, and the guide long holes 7e and 7f move in the optical axis orthogonal direction while being guided by the shafts 2e and 2f respectively. Do.
- the drive cam grooves 5j, 6i, 8i and 9j receive driving force from the blade drive pins 3j and 3i, and the rotation center hole 5d, It rotates (turns) in the optical axis orthogonal plane centering on the shaft parts 2d and 2e engaged with 6e, 8d and 9e.
- the speed of rotation can be adjusted by the shapes of the drive cam grooves 5j, 6i, 8i, 9j.
- the aperture blades 4 to 6, 8, 9 in each aperture state from the small aperture state (upper center figure) to the state immediately before the open aperture (right lower left figure), the aperture blades 4 to 6, 8, 9
- the aperture forming edge 4b, 5b, 6b, 8b, 9b and a part of the edge of the aperture 7b of the linear aperture blade 7 can form a near circular or substantially regular aperture aperture.
- the opening 7 b of the linear diaphragm blade 7 is radially inside the fixed opening 2 b of the base plate 2. Form an open stop.
- the stop device of the present embodiment can be closed and closed.
- the diaphragm device of the present embodiment moves or rotates each diaphragm blade by driving one drive arm 3 without using a component that rotates around the diaphragm opening such as a drive ring. Therefore, the diaphragm device can be miniaturized in the longitudinal direction and the width direction, and the thickness in the optical axis direction can be reduced.
- the holes and grooves are formed in the diaphragm blades 4 to 9, and the pins formed on the drive arm 3 and the base plate 2 are engaged (inserted) in these holes and grooves. It is also possible to adopt a configuration in which a pin is provided on the diaphragm blade and this is inserted into a hole or a groove formed in the drive arm or the base plate.
- FIG. 15 is an exploded view of the throttling device of the fifth embodiment of the present invention.
- the stop device of this embodiment is the stop device shown in FIG. 9 provided with an ND filter 12 for attenuating the amount of light passing through the stop opening so as to be able to advance and retract with respect to the stop opening.
- the same components as the components shown in FIG. 9 will be assigned the same reference numerals as those in FIG.
- Reference numeral 13 denotes an ND holding plate for holding the ND filter 12.
- the ND holding plate 13 is disposed on the opposite side to the diaphragm blades 4 to 9 across the cover plate 10.
- An outer cover plate 14 forms a space for moving the ND holding plate 13 between itself and the cover plate 10 and is attached to the ground plate 2.
- the sub ground plate 16 to which the ND driving unit 17 is fixed is attached to the outer cover plate 14.
- the ND drive unit 17 includes a rotor magnet (not shown), an output shaft (not shown) that rotates integrally with the rotor magnet, and a coil (not shown) that generates a magnetic force that rotates the rotor magnet when it is energized. It is an electromagnetic drive motor. It may also be a stepping motor.
- An ND arm 15 is press-fit and attached to the output shaft of the ND drive unit 17 (it may be integrally formed), and a drive pin 15a is provided at the tip of the ND arm 15.
- the drive pin 15 a penetrates the outer cover plate 14 and engages with the drive long hole 13 a formed in the lower end portion of the ND holding plate 13. Further, shaft portions 2c and 2d formed on the base plate 2 are slidably engaged with guide long hole portions 13c and 13d formed in the ND holding plate 13 so as to extend in a direction orthogonal to the optical axis. .
- the ND holding plate 13 When the ND arm 15 is rotated by the ND driving unit 17, the ND holding plate 13 receives the driving force from the driving pin 15a in the driving long hole 13a, and the guide long holes 13c and 13d have the shaft 2c, respectively. It moves in the optical axis orthogonal direction while being guided by 2d. As a result, the ND filter 12 advances and retracts with respect to the aperture.
- the ND holding plate 13 may be configured to be driven in a direction orthogonal to the optical axis while swinging as in the case of the linear stop blades 4 and 7.
- the opening formed in the linear diaphragm blade 7 or the edge formed in the other diaphragm blades 4 to 6, 8, 9 As a result, an open stop opening having a diameter smaller than that of the fixed opening 2b is formed on the radially inner side of the fixed opening 2b of the base plate 2 by the portion.
- the light amount can be reduced without narrowing the diaphragm opening too much, so it is possible to avoid the deterioration of the image quality by so-called small diaphragm diffraction.
- the shapes of ghosts and blurs can also be made close to a circle, it is possible to obtain an image of more natural image quality.
- FIG. 16 is an exploded view of a diaphragm as a light amount adjustment device (a second light amount adjustment device and a third light amount adjustment device) according to a sixth embodiment of the present invention.
- FIG. 17 shows the diaphragm device as viewed from the direction (optical axis direction) in which light passes through the diaphragm aperture formed by the diaphragm blades 4 to 9.
- FIG. 17 shows a state in which the cover plate 10 shown in FIG. 1 is removed.
- FIG. 18 shows the stop device shown in FIG. 17 as viewed obliquely.
- the vertical direction of the diaphragm device corresponds to the "direction orthogonal to the light passing direction", which is referred to as the optical axis orthogonal direction in the following description.
- the lateral direction of the diaphragm device in these figures is referred to as the width direction.
- a fixed opening 2b through which light passes is formed in a base plate 2 as a base member.
- the ground plate 2 is manufactured by press processing, resin molding, or the like.
- a diaphragm driving unit 1 is attached to a position of the outer surface (one surface in the optical axis direction) of the base plate 2 which is spaced downward from the fixed opening 2b.
- the diaphragm drive unit 1 is, for example, an electromagnetic drive that includes a rotor magnet (not shown), an output shaft 1a that rotates integrally with the rotor magnet, and a coil (not shown) that generates a magnetic force that rotates the rotor magnet. It is a motor. Also, it may be a stepping motor.
- the output shaft 1 a of the diaphragm drive unit 1 penetrates the base plate 2 and protrudes to the inner surface side of the base plate 2.
- a drive arm 3 as a drive lever is attached to the output shaft 1a by press fitting.
- the drive arm 3 pivots within a predetermined angular range with the output shaft 1a around an axis located downward from the fixed opening 2b.
- the drive arm 3 is manufactured by resin molding or the like. In addition, it is also possible to integrally form the output shaft 1a and the drive arm 3.
- the drive arm 3 has blade drive pins 3i and 3j as transmission parts for driving the diaphragm blades 4 to 9 at the tips on both sides of the position of the output shaft 1a.
- the blade drive pin 3i is engaged with three diaphragm blades of the rotary diaphragm blade 6, the linear diaphragm blade 7 and the rotary diaphragm blade 8.
- the blade drive pin 3 j is engaged with three diaphragm blades of the linear diaphragm blade 4, the rotary diaphragm blade 5 and the rotary diaphragm blade 9.
- the diaphragm drive unit 1 and the drive arm 3 are disposed on the outer surface side of the base plate 2, and the blade drive pins 3i and 3j formed on the drive arm 3 penetrate the base plate 2 and project the blade drive pins 3i and 3j to the inner surface side of the base plate 2. You may do so.
- two blade drive pins 3i and 3j are provided on one drive arm 3 directly attached to (or integrally formed with) the output shaft 1a of the diaphragm drive unit 1 and identical (common)
- One linear diaphragm blade (first diaphragm blade) 7 and two rotary diaphragm blades (second diaphragm blades) 6 and 8 are engaged with the blade drive pin 3i.
- the two linear diaphragm blades 4 and 7 can be obtained.
- the six diaphragm blades 4 to 9 form a polygonal diaphragm aperture having a nearly circular shape and Change the size (diameter).
- the movement of the linear diaphragm blades 4 and 7 in the direction orthogonal to the optical axis not only means that the linear diaphragm blades 4 and 7 move straight (parallel movement) in the direction orthogonal to the optical axis but also swings in the width direction as described later This is also inclusive of the case of moving in the direction orthogonal to the optical axis while (rotating) or shifting.
- An arm cover 11 is disposed between the drive arm 3 and the diaphragm blade 4 ( ⁇ 9) to prevent unnecessary contact between the drive arm 3 and the diaphragm blade 4 ( ⁇ 9).
- the arm cover 11 is manufactured by press processing, resin molding or the like. When there is a sufficient clearance between the drive arm 3 and the diaphragm blade 4, the arm cover 11 may be omitted.
- the cover plate 10 is a cover plate attached to the ground plate 2 so as to form a space in which the diaphragm blades 4 to 9 move with the ground plate 2.
- the cover plate 10 has an opening 10 b corresponding to the fixed opening 2 b formed in the ground plate 2.
- the cover plate 10 is manufactured by press processing, resin molding or the like.
- the diameter of the diaphragm opening can be changed by rotating the drive arm 3 as described above, and furthermore, the diaphragm opening can be completely closed (completely closed). Therefore, the diaphragm device of this embodiment can also perform the shutter operation. That is, the diaphragm device of this embodiment can also be used as a diaphragm shutter device.
- the diaphragm blades 4 to 9 are manufactured by press molding, resin molding or the like. Further, the emboss 4k, 5k, 6k1, 6k2,. 8k and 9k are formed.
- the linear diaphragm blade 4 is rotatably engaged with the blade drive pin 3 j of the drive arm 3 at a circular drive hole 4 j which is a first engagement portion. Further, a guide as a guide (guide shaft) formed in the base plate 2 is formed in the guide long hole 4c as a second engaging part formed in the linear stop blade 4 so as to extend in the direction orthogonal to the optical axis. The pin 2c is slidably engaged.
- the linear diaphragm blade 4 receives the driving force from the blade drive pin 3j in the drive hole 4j, and the blade drive pin 3j engaged with the drive hole 4j is It is rotationally moved to the center and driven in the direction orthogonal to the optical axis while being guided by the guide pin 2c.
- the linear diaphragm blade 4 is guided in the direction orthogonal to the optical axis by the guide pin 2c and the width direction centering on the guide pin 2c Swing to That is, when the linear diaphragm blade 4 reaches the lower end of the base plate 2 and retreats with respect to the fixed opening 2b, the drive hole 4j of the linear diaphragm blade 4 is a line connecting the center of the fixed opening 2b and the output shaft 1a. Swing so as to be drawn towards the approaching side.
- a circle in which the corner 2r on the right side of the base plate 2 shown in FIG. 19 is recessed inward (the output shaft 1a side) compared to the case where the linear diaphragm blade 4 simply moves straight without swinging. It can be formed in an arc shape, and the ground plate 2 can be made smaller accordingly.
- the drive hole 4 j is an elongated hole, and two guide pins 2 c provided on the base plate 2 are allowed to move rectilinearly. Also, two guide elongated holes 4c to be formed are required.
- the number of guide pins 2 c provided on the base plate 2 can be one, so the guide long hole 4 c formed in the linear diaphragm blade 4 is also As a result, the linear diaphragm blade 4 can be made smaller, and the base plate 2 can be made smaller accordingly. Therefore, the aperture device can be miniaturized, and the optical device such as a camera equipped with the aperture device and an interchangeable lens can also be miniaturized.
- the swing speed of the linear diaphragm blade 4 around the guide pin 2c can be adjusted by forming the guide long hole 4c in a cam groove shape. Further, compared to the case where the linear diaphragm blade 4 simply moves straight without swinging, in the present embodiment, by adjusting the cam groove shape of the guide long hole portion 4c, the diaphragm opening for obtaining a favorable diaphragm opening shape Shape correction is also possible.
- the rotary diaphragm blade 5 is slidably engaged with the blade drive pin 3j of the drive arm 3 at the drive cam groove 5j which is a third engagement portion.
- a rotation center pin 2d as a rotation center (rotation center shaft) formed in the base plate 2 can be rotated in a rotation center hole 5d which is a fourth engaging portion formed in the rotation diaphragm blade 5 Is engaged.
- the drive cam groove 5j receives the driving force from the blade drive pin 3j and the rotation center hole 5d is engaged. It rotates (pivots) within a plane (hereinafter referred to as an optical axis orthogonal plane) orthogonal to the optical axis about the rotation center pin 2d.
- the speed of this rotation can be adjusted by the shape of the drive cam groove 5j.
- the shape of the diaphragm opening can also be corrected by the shape of the drive cam groove 5j.
- the rotary diaphragm blade 5 is formed with an elongated hole 5e through which a rotation center pin 2e engaged with the rotation diaphragm blade 8 is penetrated to avoid interference with the rotation center pin 2e.
- the shape of the rotation diaphragm blade 5 can be made a shape that can ensure its strength, and the rotation center pin 2e is efficiently arranged on the ground plane 2 be able to. Further, by forming the elongated hole 5e in the rotary diaphragm blade 5, the rotary diaphragm blade 5 can be reduced in weight, which is effective for the shutter operation.
- the rotary diaphragm blade 6 is slidably engaged with the blade drive pin 3i of the drive arm 3 at the drive cam groove 6i which is a third engagement portion. Further, a rotation center pin 2f as a rotation center (rotation center shaft) formed in the base plate 2 is rotatable in a rotation center hole 6f which is a fourth engaging portion formed in the rotation diaphragm blade 6 Is engaged.
- the drive cam groove 6i receives the driving force from the blade drive pin 3i and the rotation center hole 6f is engaged. It rotates (pivots) in a plane orthogonal to the optical axis about the rotation center pin 2 f.
- the speed of rotation can be adjusted by the shape of the drive cam groove 6i. Further, the shape of the diaphragm opening can also be corrected by the shape of the drive cam groove 6i.
- the linear diaphragm blade 7 is rotatably engaged with the blade drive pin 3i of the drive arm 3 at a circular drive hole 7i which is a first engagement portion.
- a guide pin 2h as a shaft portion is engaged slidably.
- the linear diaphragm blade 7 When the drive arm 3 is rotated within a predetermined angle range, the linear diaphragm blade 7 receives the driving force from the blade drive pin 3i in the drive hole 7i as shown in FIG. 19, and the drive hole 7i is engaged.
- the guide cam groove portion 7 h is driven to rotate in the width direction by engagement with the guide pin 2 h while being shifted and rocked in the width direction by engagement with the guide pin 2 h.
- the linear diaphragm blade 7 simply moves straight forward without swinging, as the linear diaphragm blade 7 swings in the width direction, so that the left corner 2 r of the base plate 2 shown in FIG.
- the ground plate 2 can be made smaller accordingly. Since the cross section of the lens barrel portion of the optical device on which the iris device is mounted is generally circular, the left and right corner portions 2r can be formed in an arc shape, thereby making it possible to form the lens barrel portion (that is, the optical device). It is effective for miniaturization.
- the speed of shift and swing of the linear diaphragm blade 7 can be adjusted by the shape of the cam groove of the guide cam groove 7 h.
- the other movements are similar to those of the linear diaphragm blade 4.
- rotation center pins 8e and 9g which are fourth engaging portions formed on the rotation diaphragm blades 8 and 9, have rotation center pins as rotation center portions (rotation center shaft portions) formed on the base plate 2. 2e and 2g are rotatably engaged with each other.
- the drive cam grooves 8i and 9j receive the driving force from the blade drive pins 3i and 3j, respectively, and the rotation centers are rotated It rotates (pivots) in the plane orthogonal to the optical axis about the rotation center pins 2e and 2g engaged by the holes 8e and 9g.
- the speed of rotation can be adjusted by the shape of the drive cam grooves 8i and 9j. Further, the shape of the diaphragm opening can also be corrected by the shape of the drive cam groove portions 8i and 9j.
- the rotary diaphragm blade 9 is formed with an elongated hole 9e for penetrating the rotary center pin 2e engaged with the rotary diaphragm blade 8 and avoiding interference with the rotary center pin 2e. It is done.
- the left and right corner portions 2r of the main plate 2 described above are further inside by adjusting the timing of rotation of the rotary diaphragm blades 5, 6, 8, 9 with the shapes of the respective drive cam groove portions 5j, 6i, 8i, 9j. It can be formed to be recessed into the lens and is effective for further downsizing of the lens barrel.
- the movement or rotational position of the diaphragm blades 4 to 9 with respect to the rotational position of the drive arm 3 is the shape of the guide long hole 4c, the guide cam groove 7h and the drive cam groove 5j, 6i, 8i, 9j respectively formed.
- 8b, 9b make it possible to form a near circular or nearly regular hexagonal aperture.
- the diaphragm device of this embodiment can also be closed and closed as shown in the upper left of FIG.
- the diaphragm device of the present embodiment moves or rotates each diaphragm blade by driving one drive arm 3 without using a component that rotates around the diaphragm opening such as a drive ring. Therefore, the diaphragm device can be miniaturized in the longitudinal direction and the width direction, and the thickness in the optical axis direction can be reduced.
- the holes and grooves are formed in the diaphragm blades 4 to 9, and the pins formed on the drive arm 3 and the base plate 2 are engaged (inserted) in these holes and grooves. It is also possible to adopt a configuration in which a pin is provided on the diaphragm blade and this is inserted into a hole or a groove formed in the drive arm or the base plate.
- the aperture device of this embodiment also has the aperture formed in the linear aperture blade 7 or the other aperture blades 4 to 6, 8, 8, as described in the fourth embodiment.
- the opening formed at 9 and the edge for forming the opening may form an open stop having a diameter smaller than that of the fixed opening 2 b inside the fixed opening 2 b of the base plate 2.
- FIG. 22 is an exploded view of a diaphragm device according to a seventh embodiment of the present invention.
- the stop device of the present embodiment is provided with an ND filter 12 for attenuating the amount of light passing through the stop opening in the stop device shown in FIG.
- the same components as those shown in FIG. 16 will be assigned the same reference numerals as those in FIG.
- Reference numeral 13 denotes an ND holding plate for holding the ND filter 12.
- the ND holding plate 13 is disposed on the opposite side to the diaphragm blades 4 to 9 across the cover plate 10.
- An outer cover plate 14 forms a space for moving the ND holding plate 13 between itself and the cover plate 10 and is attached to the ground plate 2.
- the sub ground plate 16 to which the ND driving unit 17 is fixed is attached to the outer cover plate 14.
- the ND drive unit 17 includes a rotor magnet (not shown), an output shaft (not shown) that rotates integrally with the rotor magnet, and a coil (not shown) that generates a magnetic force that rotates the rotor magnet when it is energized. It is an electromagnetic drive motor. It may also be a stepping motor.
- An ND arm 15 is press-fit and attached to the output shaft of the ND drive unit 17 (it may be integrally formed), and a drive pin 15a is provided at the tip of the ND arm 15.
- the drive pin 15 a penetrates the outer cover plate 14 and engages with the ND holding plate 13.
- the ND holding plate 13 is guided in the direction orthogonal to the optical axis by the guide pin 2c formed on the base plate 2 and the rotation center pin 2d.
- the ND holding plate 13 may be configured to be driven in a direction orthogonal to the optical axis while swinging as in the case of the linear diaphragm blades 4 and 7.
- the configuration described in the sixth embodiment can be applied to the stop device provided with the ND filter.
- the light amount can be reduced without narrowing the diaphragm aperture too much, so it is possible to avoid the deterioration of the image quality due to so-called small aperture diffraction.
- the shapes of ghosts and blurs can also be made close to a circle, it is possible to obtain an image of more natural image quality.
- the aperture device of this embodiment also has the aperture formed in the linear aperture blade 7 or the other aperture blades 4 to 6, 8, 8, as described in the fourth embodiment.
- the opening formed at 9 and the edge for forming the opening may form an open stop having a diameter smaller than that of the fixed opening 2 b inside the fixed opening 2 b of the base plate 2.
- FIG. 23 shows a schematic configuration of a video camera (image pickup apparatus) as an optical apparatus equipped with the diaphragm device described in the first to seventh embodiments.
- Reference numeral 21 denotes a lens barrel of the video camera.
- a photographing optical system including a variable magnification lens 32, the stop device 20 of Embodiments 1 and 2, and a focus lens 29 is accommodated.
- Reference numeral 25 denotes an image pickup device constituted by photoelectric conversion elements such as a CCD sensor or a CMOS sensor.
- the image sensor 25 photoelectrically converts an object image formed by the photographing optical system and outputs an electric signal. Setting the brightness of the subject image formed on the imaging device 25 (that is, the amount of light reaching the imaging device 25) properly by changing the diaphragm aperture of the diaphragm device 20 or advancing and retracting the ND filter. Can.
- the electrical signal output from the imaging device 25 undergoes various image processing in the image processing circuit 26. Thereby, a video signal (video output) is generated.
- the controller 22 controls the zoom motor 31 in response to the user's operation of a zoom switch (not shown), and moves the magnification varying lens 32 to perform zooming (zooming). Further, the controller 22 detects the contrast of the video signal, controls the focus motor 28 according to the contrast, and moves the focus lens 29 to perform autofocus.
- the controller 22 controls the diaphragm drive unit 1 (and the ND drive unit 17) of the diaphragm device 20 based on the luminance information of the video signal to adjust the light amount.
- the diaphragm device 20 incorporated in the lens barrel portion is compact, the lens barrel portion and the entire video camera can be miniaturized.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Diaphragms For Cameras (AREA)
- Shutters For Cameras (AREA)
Abstract
Description
回転絞り羽根6は、第3の係合部である駆動カム溝部6iにて、駆動アーム3の羽根駆動ピン3iと摺動可能に係合している。また、回転絞り羽根6に形成された第4の係合部である回転中心孔部6fには、地板2に形成された回転中心部(回転中心軸部)としての回転中心ピン2fが回転可能に係合している。
2 地板
2c,2d,2e,2f 軸部
3 駆動アーム
3i,3j 駆動ピン
4,7 リニア絞り羽根
5,6,8,9 回転絞り羽根
12 NDフィルタ
Claims (12)
- 光を通過させる開口を有するベース部材と、
前記ベース部材に対して、光通過方向に直交する方向に移動して前記開口に対して進退する第1の絞り羽根と、
前記ベース部材に対して、前記光通過方向に直交する面内で回転して前記開口に対して進退する第2の絞り羽根と、
前記ベース部材に取り付けられ、前記第1および第2の絞り羽根を駆動する駆動部とを有し、
前記ベース部材は、前記第1の絞り羽根に形成された溝部に係合して該第1の絞り羽根をその移動方向にガイドする突起部を有しており、
前記第2の絞り羽根は、前記突起部を中心として前記面内で回転することを特徴する光量調節装置。 - 前記突起部を複数有し、かつ前記第1および第2の絞り羽根をそれぞれ複数有しており、
該各突起部に、前記第1および第2の絞り羽根が係合していることを特徴とする請求項1に記載の光量調節装置。 - 前記開口から前記光通過方向に直交する方向に離れて位置する軸回りにおいて前記駆動部により回動されて前記第1および第2の絞り羽根を共に駆動する駆動レバーを有しており、
前記第1および第2の絞り羽根は、前記駆動レバーに設けられた同一の伝達部に係合して駆動されることを特徴とする請求項1又は2に記載の光量調節装置。 - 前記軸部と前記伝達部とが、前記第1の絞り羽根の移動方向のうち前記開口に対して一方の側に設けられていることを特徴とする請求項1から3のいずれか1項に記載の光量調節装置。
- 前記第1および第2の絞り羽根のうち少なくとも1つの絞り羽根は、開放絞り状態において、前記ベース部材の前記開口よりも径が小さい開放絞り開口を形成することを特徴とする請求項1から4のいずれか1項に記載の光量調節装置。
- 光を通過させる開口を有するベース部材と、
前記ベース部材に対して、光通過方向に直交する方向に移動して前記開口に対して進退する第1の絞り羽根と、
前記ベース部材に対して、前記光通過方向に直交する面内で回転して前記開口に対して進退する第2の絞り羽根と、
前記ベース部材に取り付けられた駆動部と、
前記開口から前記光通過方向に直交する方向に離れて位置する軸回りにおいて前記駆動部により回動されて前記第1および第2の絞り羽根を共に駆動する駆動レバーとを有し、
前記第1および第2の絞り羽根は、前記駆動レバーに設けられた同一の伝達部に係合して駆動されることを特徴とする光量調節装置。 - 前記駆動レバーは、複数の前記伝達部を有しており、
該複数の伝達部のそれぞれに、前記第1および第2の絞り羽根が係合していることを特徴とする請求項6に記載の光量調節装置。 - 前記第1の絞り羽根は、前記伝達部と係合する第1の係合部と、前記ベース部材に設けられたガイド部に摺動可能に係合する第2の係合部とを有し、
前記第2の絞り羽根は、前記伝達部と摺動可能に係合する第3の係合部と、前記ベース部材に設けられた回転中心部に回転可能に係合する第4の係合部とを有し、
前記駆動レバーの回動により、前記第1の絞り羽根は、前記第1の係合部が前記伝達部からの駆動力を受け、前記第2の係合部が前記ガイド部によってガイドされながら前記光通過方向に直交する方向に移動し、前記第2の絞り羽根は、前記第3の係合部が前記伝達部からの駆動力を受け、前記第4の係合部が係合した前記回転中心部を中心として前記光通過方向に直交する面内で回転することを特徴とする請求項6又は7に記載の光量調節装置。 - 前記第1および第2の絞り羽根のうち少なくとも1つの絞り羽根は、開放絞り状態において、前記ベース部材の前記開口よりも径が小さい開放絞り開口を形成することを特徴とする請求項6から8のいずれか1項に記載の光量調節装置。
- 光を通過させる開口を有するベース部材と、
前記ベース部材に取り付けられた駆動部と、
前記駆動部により回動される駆動レバーと、
前記駆動レバーに設けられた伝達部に係合して該駆動レバーにより駆動され、前記開口に対して進退する第1の絞り羽根および第2の絞り羽根とを有し、
前記第1の絞り羽根は、前記伝達部と回転可能に係合する第1の係合部と、前記ベース部材に設けられたガイド部に摺動可能に係合する第2の係合部とを有し、
前記第2の絞り羽根は、前記伝達部と摺動可能に係合する第3の係合部と、前記ベース部材に設けられた回転中心部に回転可能に係合する第4の係合部とを有し、
前記第1の絞り羽根は、光通過方向に直交する方向に移動するとともに前記第1の係合部と係合した前記伝達部を中心として回転するように駆動され、
前記第2の絞り羽根は、前記第4の係合部と係合する前記ベース部材に設けられた回転中心部を中心として前記光通過方向に直交する面内で回転するように駆動されることを特徴とする光量調節装置。 - 前記第1および第2の絞り羽根のうち少なくとも1つの絞り羽根は、開放絞り状態において、前記ベース部材の前記開口よりも径が小さい開放絞り開口を形成することを特徴とする請求項10に記載の光量調節装置。
- 請求項1から11のいずれか一項に記載の光量調節装置を備えたことを特徴とする光学機器。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11819580.9A EP2610670B1 (en) | 2010-08-23 | 2011-08-22 | Light amount adjustment device and optical equipment |
CN201180041188.9A CN103080830B (zh) | 2010-08-23 | 2011-08-22 | 光量调节装置和光学设备 |
JP2012530530A JP5875983B2 (ja) | 2010-08-23 | 2011-08-22 | 光量調節装置および光学機器 |
US13/774,548 US9007671B2 (en) | 2010-08-23 | 2013-02-22 | Light-quantity control apparatus and optical apparatus |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-185865 | 2010-08-23 | ||
JP2010185865 | 2010-08-23 | ||
JP2010-243418 | 2010-10-29 | ||
JP2010243418 | 2010-10-29 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/774,548 Continuation US9007671B2 (en) | 2010-08-23 | 2013-02-22 | Light-quantity control apparatus and optical apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012026104A1 true WO2012026104A1 (ja) | 2012-03-01 |
Family
ID=45723126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/004649 WO2012026104A1 (ja) | 2010-08-23 | 2011-08-22 | 光量調節装置および光学機器 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9007671B2 (ja) |
EP (1) | EP2610670B1 (ja) |
JP (5) | JP5875983B2 (ja) |
CN (1) | CN103080830B (ja) |
WO (1) | WO2012026104A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014136457A1 (ja) * | 2013-03-08 | 2014-09-12 | キヤノン電子株式会社 | 光量調節装置および光学機器並びに撮像装置 |
WO2017169477A1 (ja) * | 2016-03-31 | 2017-10-05 | キヤノン電子株式会社 | 光量調節装置及び光学機器 |
JP2017187730A (ja) * | 2016-03-31 | 2017-10-12 | キヤノン電子株式会社 | 光量調節装置及び光学機器 |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2610670B1 (en) * | 2010-08-23 | 2020-05-06 | Canon Denshi Kabushiki Kaisha | Light amount adjustment device and optical equipment |
CN104583859B (zh) * | 2012-08-24 | 2018-06-29 | 佳能电子株式会社 | 光量调节装置以及光学器件 |
KR102208491B1 (ko) * | 2014-08-04 | 2021-01-27 | 한화테크윈 주식회사 | 조리개 장치 |
CN104714354B (zh) * | 2014-10-30 | 2017-08-22 | 启芯瑞华科技(武汉)有限公司 | 一种光圈结构及其图像处理方法 |
JP6513182B2 (ja) * | 2015-03-13 | 2019-05-15 | キヤノン株式会社 | 撮像装置 |
JP1543838S (ja) * | 2015-08-21 | 2016-02-15 | ||
KR102415064B1 (ko) | 2015-12-31 | 2022-06-30 | 한화테크윈 주식회사 | 광량 조절 장치 |
JP6810443B2 (ja) * | 2016-06-22 | 2021-01-06 | 株式会社nittoh | 絞り装置、レンズ鏡筒及び撮像装置又は投影装置 |
CN106597775A (zh) * | 2017-02-27 | 2017-04-26 | 中山联合光电科技股份有限公司 | 一种类圆形光圈结构 |
CN107065170B (zh) * | 2017-05-12 | 2019-07-05 | 重庆金山医疗器械有限公司 | 电子内窥镜光源光路控制系统 |
KR102297281B1 (ko) * | 2019-03-21 | 2021-09-02 | 삼성전기주식회사 | 조리개 모듈 및 이를 포함하는 카메라 모듈 |
CN111596500A (zh) * | 2020-06-22 | 2020-08-28 | 睿恩光电有限责任公司 | 光圈装置、相机装置及电子设备 |
CN114666465B (zh) * | 2020-12-23 | 2023-04-18 | 宁波舜宇光电信息有限公司 | 可变光圈装置及摄像模组、电子设备 |
CN114355704A (zh) * | 2021-12-30 | 2022-04-15 | 福建福光天瞳光学有限公司 | 一种经济高效可变光圈及其装配方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04119434U (ja) * | 1991-04-09 | 1992-10-26 | ミノルタカメラ株式会社 | 絞り装置 |
JP2006072151A (ja) | 2004-09-03 | 2006-03-16 | Fujinon Corp | 絞り板 |
JP2009115831A (ja) | 2007-11-01 | 2009-05-28 | Sony Corp | 光量調整装置、レンズ鏡筒および撮像装置 |
JP2010145708A (ja) * | 2008-12-18 | 2010-07-01 | Sony Corp | 絞り装置、レンズ鏡筒および撮像装置 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6020105Y2 (ja) * | 1978-08-31 | 1985-06-17 | 日本精密工業株式会社 | カメラ用光量絞り装置 |
JPH0248928U (ja) | 1988-09-30 | 1990-04-05 | ||
JP2002162665A (ja) * | 2000-11-27 | 2002-06-07 | Canon Inc | 光量調節装置 |
JP3802870B2 (ja) * | 2002-12-20 | 2006-07-26 | 株式会社タムロン | 光量調節装置 |
JP4273008B2 (ja) * | 2004-01-28 | 2009-06-03 | キヤノン株式会社 | 光量調節装置および光学機器 |
JP3983235B2 (ja) * | 2004-08-20 | 2007-09-26 | ニスカ株式会社 | 光量調整装置 |
JP2007047289A (ja) * | 2005-08-08 | 2007-02-22 | Canon Inc | 光量調節装置および光学機器 |
JP4393539B2 (ja) * | 2007-07-30 | 2010-01-06 | 日本電産コパル株式会社 | 光学機器用羽根駆動装置 |
US8842355B2 (en) * | 2007-12-10 | 2014-09-23 | Parker-Hannifin Corporation | Lens shutter and aperture control devices |
JP4735996B2 (ja) * | 2008-12-18 | 2011-07-27 | ソニー株式会社 | 光量調整装置、レンズ鏡筒および撮像装置 |
EP2610670B1 (en) * | 2010-08-23 | 2020-05-06 | Canon Denshi Kabushiki Kaisha | Light amount adjustment device and optical equipment |
-
2011
- 2011-08-22 EP EP11819580.9A patent/EP2610670B1/en active Active
- 2011-08-22 CN CN201180041188.9A patent/CN103080830B/zh active Active
- 2011-08-22 WO PCT/JP2011/004649 patent/WO2012026104A1/ja active Application Filing
- 2011-08-22 JP JP2012530530A patent/JP5875983B2/ja active Active
-
2013
- 2013-02-22 US US13/774,548 patent/US9007671B2/en active Active
-
2016
- 2016-01-20 JP JP2016008391A patent/JP6105100B2/ja active Active
-
2017
- 2017-03-01 JP JP2017038323A patent/JP6395883B2/ja active Active
-
2018
- 2018-08-28 JP JP2018159257A patent/JP6644843B2/ja active Active
-
2020
- 2020-01-08 JP JP2020001452A patent/JP6950009B2/ja active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04119434U (ja) * | 1991-04-09 | 1992-10-26 | ミノルタカメラ株式会社 | 絞り装置 |
JP2006072151A (ja) | 2004-09-03 | 2006-03-16 | Fujinon Corp | 絞り板 |
JP2009115831A (ja) | 2007-11-01 | 2009-05-28 | Sony Corp | 光量調整装置、レンズ鏡筒および撮像装置 |
JP2010145708A (ja) * | 2008-12-18 | 2010-07-01 | Sony Corp | 絞り装置、レンズ鏡筒および撮像装置 |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014136457A1 (ja) * | 2013-03-08 | 2014-09-12 | キヤノン電子株式会社 | 光量調節装置および光学機器並びに撮像装置 |
CN105190425A (zh) * | 2013-03-08 | 2015-12-23 | 佳能电子株式会社 | 光量调节装置、光学装置和图像拍摄设备 |
US9366941B2 (en) | 2013-03-08 | 2016-06-14 | Canon Denshi Kabushiki Kaisha | Light amount adjustment device, optical device, and image capturing apparatus |
JP6018290B2 (ja) * | 2013-03-08 | 2016-11-02 | キヤノン電子株式会社 | 光量調節装置および光学機器 |
JP2016218485A (ja) * | 2013-03-08 | 2016-12-22 | キヤノン電子株式会社 | 光量調節装置 |
WO2017169477A1 (ja) * | 2016-03-31 | 2017-10-05 | キヤノン電子株式会社 | 光量調節装置及び光学機器 |
JP2017187730A (ja) * | 2016-03-31 | 2017-10-12 | キヤノン電子株式会社 | 光量調節装置及び光学機器 |
US10884316B2 (en) | 2016-03-31 | 2021-01-05 | Canon Denshi Kabushiki Kaisha | Light amount adjusting device and optical device |
Also Published As
Publication number | Publication date |
---|---|
JP2016105195A (ja) | 2016-06-09 |
EP2610670A1 (en) | 2013-07-03 |
JP6395883B2 (ja) | 2018-09-26 |
JP6644843B2 (ja) | 2020-02-12 |
JP6950009B2 (ja) | 2021-10-13 |
JP2017102483A (ja) | 2017-06-08 |
CN103080830B (zh) | 2015-11-25 |
US9007671B2 (en) | 2015-04-14 |
US20130170009A1 (en) | 2013-07-04 |
JP2020057023A (ja) | 2020-04-09 |
JP5875983B2 (ja) | 2016-03-02 |
JP6105100B2 (ja) | 2017-03-29 |
JPWO2012026104A1 (ja) | 2013-10-28 |
JP2018194861A (ja) | 2018-12-06 |
EP2610670A4 (en) | 2014-11-26 |
CN103080830A (zh) | 2013-05-01 |
EP2610670B1 (en) | 2020-05-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6950009B2 (ja) | 光量調節装置 | |
JP6018290B2 (ja) | 光量調節装置および光学機器 | |
US8807847B2 (en) | Lens barrel and imaging device | |
US10884316B2 (en) | Light amount adjusting device and optical device | |
US20120070138A1 (en) | Lens barrel | |
US8861104B2 (en) | Lens barrel and imaging device | |
JP5906467B2 (ja) | レンズ鏡筒 | |
JP2012145929A (ja) | 光量調節装置および光学機器 | |
US8422152B2 (en) | Lens barrel | |
KR20130136824A (ko) | 경통 조립체 및 이를 구비한 촬영 장치 | |
JP5882627B2 (ja) | レンズ鏡筒 | |
JP2011039178A (ja) | 光量調節装置 | |
JP5897887B2 (ja) | レンズ鏡筒 | |
JP2023059090A (ja) | 光量調節装置及び光学機器 | |
JP4894329B2 (ja) | シャッター装置 | |
JP2009244613A (ja) | 沈胴式のカメラ用レンズ鏡胴 | |
JP2020134723A (ja) | 光量調節装置及び光学機器 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180041188.9 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11819580 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2012530530 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011819580 Country of ref document: EP |