Lens apparatus and camera

• US 7,031,075 B2
• Filed: 12/06/2004
• Issued: 04/18/2006
• Est. Priority Date: 12/12/2003
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Tsuji, Kanji
• Primary Examiner(s): Mack, Ricky L.
• Assistant Examiner(s): HASAN, MOHAMMED A
• Application Number:
  US11/003,497
• Publication Number:
  US 20050128603A1
• Time in Patent Office: 498 Days
• Field of Search: 359/694, 359/699, 359/819, 359821-823
• US Class Current: 359/694
• CPC Class Codes: G02B 7/102 controlled by a microcomputer cameras with interchangeable lenses G03B17/14

Abstract

A lens apparatus is disclosed which can achieve, an optical adjustment with a simple structure having a small number of parts. The lens apparatus has a lens unit, a lens holding member which holds the lens unit, a first holding member which holds the lens holding member, and a second holding member which holds the first holding member.

Claims

1. A lens apparatus comprising:

a lens unit;

a lens holding member which holds the lens unit;

a first holding member which holds the lens holding member; and

a second holding member which holds the first holding member,

wherein at least one of the first and second holding members includes a position adjustment portion which abuts on the other and has a stepped shape for performing positioning of the first holding member to the second holding member in an optical axis direction, and

at least one of the lens holding member and the first holding member includes a surface which abuts on the other and the lens holding member can turn with the surface.

2. The lens apparatus according to claim 1, wherein the surface has a spherical shape centered at the rear principal point of the lens unit.

3. The lens apparatus according to claim 1, wherein the surface also acts a surface for performing positioning of the lens holding member to the first holding member in the optical axis direction.

4. The lens apparatus according to claim 1, wherein the lens unit is placed closest to an object side in a plurality of lens units included in the lens apparatus.

5. A camera comprising:

the lens apparatus according to claim 1; and

an image-pickup element which photoelectrically converts a luminous flux from the lens apparatus.

6. A lens apparatus comprising:

a lens unit;

a lens holding member which holds the lens unit;

a first holding member which holds the lens holding member; and

a second holding member which holds the first holding member,

wherein at least one of the first and second holding members includes a position adjustment portion which abuts on the other and has a stepped shape for performing positioning of the first holding member to the second holding member in an optical axis direction, and

one of the lens holding member and the first holding member includes a rounded surface which abuts on the other and the other includes a flat surface which abuts on the rounded surface.