Light amount adjusting device and image capture apparatus

Abstract

A light amount adjusting device includes: a cover plate having a light-passing hole; a first separator being sheet-shaped and having a hole; a second separator being elastically deformable and sheet-shaped, positioned on a side opposite to the cover plate with the first separator therebetween, and having a hole; a first light amount adjusting blade movable between the cover plate and the first separator; a second light amount adjusting blade being movable between the first separator and the second separator; a base body to which the cover plate, the first separator, and the second separator are mounted, having a throughhole and mounting grooves, the throughhole being formed to have a diameter larger than a diameter of the hole of the second separator, the mounting grooves allowing the second separator to be mounted therein and being opened toward the throughhole.

1 . An intermediate movable device of an image capture apparatus, comprising:
 a base frame having a circumferential surface with a hole formed at a midsection on a side of the base frame having a longest dimension; and   a blur correction mechanism to correct a focal position, the blur correction mechanism including
 a first correcting moving frame having a hole formed at a midsection on a side of the first correcting moving frame having a longest dimension, and 
 a second correcting moving frame having a lens mounted at a midsection on a side of the second correcting moving frame having a longest dimension. 
   
   
   
       2 . The intermediate movable device according to  claim 1 , wherein the first correcting moving frame is movably supported by the base frame in a left-right direction with respect to the base frame. 
   
   
       3 . The intermediate movable device according to  claim 1 , wherein the first correcting moving frame further includes a first shaft support having a first throughhole in a left-right direction with respect to the base frame, and a second shaft support having a second throughhole in an up-down direction with respect to the base frame. 
   
   
       4 . The intermediate movable device according to  claim 3 , wherein the first correcting frame further includes a first guide shaft to guide the movement of the first correcting moving frame, the first guide shaft being slidable relative to the first throughhole, and a second guide shaft to guide the movement of the second correcting moving frame, the second guide shaft being fixed to the second throughhole. 
   
   
       5 . The intermediate movable device according to  claim 3 , wherein a center of the first throughhole and a center of the second throughhole are positioned in a plane orthogonal to an optical axis. 
   
   
       6 . The intermediate movable device according to  claim 1 , wherein the first correcting moving frame further includes a first sub-guide shaft to guide movement of the first correcting moving frame, and a second sub-guide shaft to guide movement of the second correcting moving frame. 
   
   
       7 . The intermediate movable device according to  claim 1 , wherein the second correcting frame is movably supported by the first correcting moving frame in an up-down direction with respect to the first correcting moving frame. 
   
   
       8 . The intermediate movable device according to  claim 7 , wherein the second correcting frame moves in a left-right direction when the first correcting moving frame is moving in the left-right direction. 
   
   
       9 . The intermediate movable device according to claim  4 , wherein the second correcting moving frame further includes a plurality of supported cylindrical portions to move the second correcting moving frame, the plurality of supported cylindrical portions being slidably supported by end portions of the second guide shaft. 
   
   
       10 . The intermediate movable device according to  claim 4 , further comprising:
 a plurality of driving magnets fixed to the base frame; and   a circuit board mounted on a front surface of the second correcting moving frame, the circuit board including
 a plurality of driving coils facing the plurality of driving magnets, and 
 a plurality of hall sensors to detect the position of the first correcting moving frame and the second correcting moving frame. 
   
   
   
       11 . The intermediate movable device according to  claim 10 , wherein the plurality of driving coils and plurality of driving magnets perform blur correction by receiving driving currents to form a thrusting force in a predetermined direction to move the first correcting moving frame and the second correcting moving frame. 
   
   
       12 . The intermediate movable device according to  claim 10 , wherein a first driving coil of the plurality of driving coils is positioned parallel to the first shaft support and a second driving coil of the plurality of driving coils is positioned parallel to the second shaft support. 
   
   
       13 . The intermediate movable device according to  claim 10 , wherein a perimeter of the circumferential surface of the base body includes a first flat portion parallel to the first shaft support and a second flat portion below the first flat parallel portion. 
   
   
       14 . The intermediate movable device according to  claim 13 , wherein one of the plurality of driving coils is mounted parallel to the first flat portion. 
   
   
       15 . The intermediate movable device according to  claim 13 , wherein one of the plurality of hall sensors is arranged closer to the second flat portion than any of the plurality of driving coils. 
   
   
       16 . The intermediate movable device according to  claim 13 , wherein the intermediate movable device is connected to a linear guide having
 a circumferential surface with a hole formed at a midsection, and   a plurality of guide projections protruding from the perimeter of the circumferential surface.   
   
   
       17 . The intermediate movable device according to  claim 16 , wherein one of the plurality of guide projections is positioned between the plurality of driving coils and the first and second flat portions. 
   
   
       18 . The intermediate movable device according to claim  16 , wherein the plurality of guide projections are uniformly spaced about the circumferential surface of the linear guide. 
   
   
       19 . An intermediate movable device of an image capture apparatus, comprising:
 means for correcting a focal position, including
 means for moving a first correcting moving frame, the first correcting moving frame having a hole formed at a midsection on a side of the first correcting moving frame having a longest dimension, and 
 means for moving a second correcting moving frame, the second correcting moving frame having a lens mounted at a midsection on a side of the second correcting moving frame having a longest dimension, 
   means for supporting the first correcting moving frame at a position along the optical axis of the image capture apparatus.   
   
   
       20 . An image capture apparatus comprising:
 a lens barrel including
 a predetermined lens group, and 
 a light adjusting device to adjust an amount of light captured in the lens barrel via the lens group, 
   a body to support the lens barrel; and   an intermediate movable device including
 a base frame having a circumferential surface with a hole formed at a midsection on a side of the base frame having a longest dimension, and 
   a blur correction mechanism to correct a focal position, the blur correction mechanism including
 a first correcting moving frame having a hole formed at a midsection on a side of the first correcting moving frame having a longest dimension, and 
 a second correcting moving frame having a lens mounted at a midsection on a side of the second correcting moving frame having a longest dimension.