JP2013228499A5

JP2013228499A5 -

Info

Publication number: JP2013228499A5
Application number: JP2012099393A
Authority: JP
Filing date: 2012-04-25
Publication date: 2015-08-20
Anticipated expiration: 2032-04-25

Description

本発明のレンズ鏡筒は、第１のレンズと第２のレンズを有する第１のレンズ群と、第１の溝部を有する第１の筒と、第２の溝部を有し、前記第１のレンズ群の光軸周りに前記第１の筒に対して回転可能に構成された第２の筒と、前記第１のレンズを保持する第１のレンズ保持部材と、前記第２のレンズを保持する第２のレンズ保持部材と、前記第１の溝部および前記第２の溝部に挿入された第１のカムフォロワーと、を有する第１のレンズユニットと、前記第２のレンズ保持部材に光軸方向に弾性力を加える弾性部材と、前記光軸周りに所定の間隔で前記第２のレンズ保持部材に固定された複数のカラーと、を有し、前記第１のレンズ保持部材はそれぞれ、前記カラーが挿入される複数のカラー挿入部を有し、前記カラー挿入部は前記光軸に直交する方向に面が形成された第１の面と、前記光軸方向に面が形成された一対の第２の面を有し、前記カラーは、前記弾性部材によって前記第１の面に向けて付勢され、前記カラーと前記カラー挿入部の接触状態が変更されることによって、前記第１のレンズと前記第２のレンズの間の間隔、傾き、偏芯の少なくとも一つを調整可能であることを特徴とする。 The lens barrel of the present invention includes a first lens group having a first lens and a second lens, a first cylindrical having a first groove, a second groove, before Symbol first A second cylinder configured to be rotatable with respect to the first cylinder around an optical axis of the lens group, a first lens holding member that holds the first lens, and the second lens. a second lens holding member for holding said first groove portion and the second and the first cam follower which is inserted into the groove, a first lens unit that having a, the second lens holding member An elastic member for applying an elastic force in the optical axis direction, and a plurality of collars fixed to the second lens holding member at predetermined intervals around the optical axis. The first lens holding member each have a plurality of color insertion portion into which the collar is inserted, the collar insert the optical axis Has a first surface that faces in the direction orthogonal is formed, the optical axis direction to the plane is formed a pair of the second surface, the collar is directed to the first surface by said resilient member is biased Te, by contact of the collar with the collar insertion portion is changed, the spacing between said first lens and said second lens, tilt, adjustable at least one eccentric characterized in that there.

Claims

A first lens group having a first lens and a second lens;
A first tube having a first groove;
A second groove, and the front Stories second cylinder rotatably configured relative to the first cylinder about the optical axis of the first lens group,
A first lens holding member for holding the first lens; a second lens holding member for holding the second lens; and the first groove and the first groove inserted into the second groove. a first lens unit that Yusuke and the cam follower, and
An elastic member for applying an elastic force in the optical axis direction to the second lens holding member;
A plurality of collars fixed to the second lens holding member at predetermined intervals around the optical axis;
Each of the first lens holding member has a plurality of color insertion portion into which the collar is inserted, the collar insertion portion has a first surface which faces in a direction perpendicular to the optical axis is formed, the and a pair of second surfaces face in the optical axis direction is formed, the collar is biased toward the first surface by said resilient member,
By contact of the collar with the collar insertion portion is changed, and wherein the distance between the first lens and the second lens, the inclination is adjustable at least one eccentric Lens barrel to be used.

Having said first groove portion and the second of the second cam follower which is inserted into the groove, further a second lens unit that Soo coercive different second lens group and the first lens group Have
The lens barrel according to claim 1 , wherein the elastic member is disposed between the second lens unit and the second lens holding member.

Have a fixed frame which is fixed to the lens barrel,
The elastic member, a lens barrel according to claim 1, characterized in that it is disposed between the second lens holding member and the fixed frame.

The collar has a first cylindrical portion, a second cylindrical portion, and a third cylindrical portion, and the first cylindrical portion and the second cylindrical portion are displaced from each other in the central axis, and the first cylindrical portion and the third cylindrical portion The central axes coincide and
The third cylindrical portion is fixed to the second lens holding member,
The collar insertion portion has a pair of surfaces parallel to the optical axis in contact with the second cylindrical portion,
By the diameter of the first cylindrical portion of the collar is changed by adjusting at least one of the distance or inclination of the first lens and the second lens,
By the color is rotated about a central axis of the third cylindrical portion and said first cylindrical portion, to adjust the eccentricity of the first lens and the second lens, it is characterized in claim The lens barrel according to any one of Items 1 to 3.

By varying the diameter of the first cylindrical portion of said plurality of colors, a lens barrel according to claim 4, characterized by adjusting the tilt of the first lens and the second lens.