Optical apparatus

• US 5,825,560 A
• Filed: 02/26/1996
• Issued: 10/20/1998
• Est. Priority Date: 02/28/1995
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Yanai, Toshikazu, Kimura, Kenichi, Takeda, Nobuhiro, Uchino, Yoshihiro, Ogura, Shigeo, Kurihashi, Toshiya
• Primary Examiner(s): Ben, Loha
• Application Number:
  US08/606,845
• Time in Patent Office: 967 Days
• Field of Search: 359/813, 359/822, 359/823, 359/824, 359/831, 359/696, 359/697, 250/201.1, 250/201.2, 250/201.5, 250/201.7, 250/201.8, 396/87, 396/98
• US Class Current: 359/822
• CPC Class Codes: G02B 7/00 Mountings, adjusting means, or light-tight connections, for optical elements
• CPC Class Codes: G02B 7/102 controlled by a microcomputer cameras with interchangeable lenses G03B17/14
• CPC Class Codes: H04N 23/52 Elements optimising image sensor operation, e.g. for electromagnetic interference [EMI] protection or temperature control by heat transfer or cooling elements
• CPC Class Codes: H04N 23/54 Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
• CPC Class Codes: H04N 23/55 Optical parts specially adapted for electronic image sensors; Mounting thereof

Abstract

There is provided an optical apparatus which has excellent assembly performance, can suppress an increase in cost, and attain a decrease in thickness. The optical apparatus includes a board (1) having a photographing optical system and a mechanical system mounted on its surface. A plurality of opening portions (1a, 1b, 1c) are formed in the board (1). The opening portion (1a) is sealed with a sealing member such as a glass member to allow a light beam to pass and prevent dust and the like from entering the storage space for parts between the board (1) and a shield case (49). The photographing optical system mounted on the board (1) includes a stop unit (30) for adjusting the light amount of an object image guided through the opening portion (1a), and prism-like optical members (G1, G2, G3, G4), each consisting of, e.g., a glass or plastic material and having a sculptured surface as a reflecting surface. Light emerging from the optical member (G4) is received by a solid-state image sensing element (2) mounted on the lower surface of the board (1) through the opening portion (1c).

Claims

1. An optical apparatus for forming an object image on a solid-state image sensing element through a photographing optical system, comprising a board on which said photographing optical system and said solid-state image sensing element are mounted, wherein a movable optical member included in said photographing optical system and movable relative to said solid-state image sensing element, and position detection means for detecting a moving position of said movable optical member are mounted on said board.

2. The apparatus according to claim 1, wherein said movable optical member is held by holding means movably mounted on said board in a predetermined direction.

3. The apparatus according to claim 2, wherein at least a portion of a drive circuit for said position detection means is mounted on said board.

4. The apparatus according to claim 2, wherein at least a portion of a drive circuit for said position detection means is formed on said board.

5. The apparatus according to claim 1, wherein at least a portion of a drive circuit for said position detection means is mounted on said board.

6. The apparatus according to claim 1, wherein at least a portion of a drive circuit for said position detection means is formed on said board.

7. An optical apparatus for forming an object image on a solid-state image sensing element through a photographing optical system, comprising a board on which said photographing optical system and said solid-state image sensing element are mounted, wherein a movable optical member included in said photographing optical system and movable relative to said solid-state image sensing element, and at least some of constituent members of an actuator for moving said movable optical member in a predetermined direction are mounted on said board.

8. The apparatus according to claim 7, wherein said constituent members of said actuator include a movable member for moving said optical member in the predetermined direction while holding said movable optical member.

9. The apparatus according to claim 8, wherein said movable member of said actuator is not electrically connected to said board.

10. The apparatus according to claim 8, wherein said actuator includes driving force generation means for generating an electromagnetic force for driving said movable member.

11. The apparatus according to claim 10, wherein said driving force generation means includes a magnet mounted on said movable member, and a coil and a yoke which are mounted on said board.

12. The apparatus according to claim 11, wherein said yoke is constituted by a portion of said board.

13. The apparatus according to claim 7, wherein at least some of parts constituting a drive circuit for said actuator are mounted on said board.

14. An optical apparatus for forming an object image on a solid-state image sensing element through a photographing optical system, comprising a board on which said photographing optical system and said solid-state image sensing element are mounted, wherein light amount adjustment means for adjusting a light amount of the object image, and at least some of constituent members of an actuator for driving said light amount adjustment means are mounted on said board.

15. The apparatus according to claim 14, wherein said light amount adjustment means performs the light amount adjustment in accordance with a size of an aperture formed by operations of a plurality of movable adjustment members.

16. The apparatus according to claim 15, wherein said constituent members of said actuator include a movable member for driving said movable adjustment member for said light amount adjustment means while holding said member.

17. The apparatus according to claim 16, wherein at least some of parts constituting a drive circuit for said actuator are mounted on said board.

18. The apparatus according to claim 17, wherein said driving force generation means includes a magnet mounted on said movable member, and a coil and a yoke which are mounted on said board.

19. The apparatus according to claim 18, wherein said yoke is constituted by a portion of said board.

20. The apparatus according to claim 16, wherein said movable member for said actuator is not electrically connected to said board.

21. The apparatus according to claim 16, wherein said actuator includes driving force generation means for generating an electromagnetic force for driving said movable member.

22. The apparatus according to claim 15, wherein said actuator includes driving force generation means for generating an electromagnetic force for driving said movable adjustment member for said light amount adjustment means.

23. The apparatus according to claim 22, wherein said driving force generation means includes a magnet mounted on said movable adjustment member for said light amount adjustment means, and a coil and a yoke which are mounted on said board.

24. The apparatus according to claim 23, wherein said yoke is constituted by a portion of said board.

25. An optical apparatus for forming an object image on a solid-state image sensing element through a photographing optical system, comprising a board on which said photographing optical system and said solid-state image sensing element are mounted, light amount adjustment means for performing a light amount adjusting operation to adjust a light amount of the object image, and drive means for generating a driving force used by said light amount adjustment means to perform a light amount adjusting operation, wherein said light amount adjustment means and said drive means are arranged on a plane parallel to said board.

26. The apparatus according to claim 25, wherein an optical path portion extending in a direction perpendicular to said board is included in an optical path formed by said photographing optical system, and said light amount adjustment means is arranged to adjust an amount of light passing through the optical path portion.

27. The apparatus according to claim 26, wherein said light amount adjustment means includes a movable adjustment member for performing the light amount adjusting operation by adjusting a light passage area of the optical path portion, and said movable adjustment member operates along the plane substantially parallel to said board.

28. The apparatus according to claim 27, wherein said movable adjustment member has a shaft rotatably and vertically supported on said board, and rotates about said shaft.

29. The apparatus according to claim 28, wherein at least some of constituent members of said actuator are mounted on said board.

30. The apparatus according to claim 27, wherein at least some of constituent members of said actuator are mounted on said board.

31. The apparatus according to claim 26, wherein at least some of constituent members of said actuator are mounted on said board.

32. The apparatus according to claim 25, wherein at least some of constituent members of said actuator are mounted on said board.

33. An optical apparatus for forming an object image on a solid-state image sensing element through a photographing optical system, comprising a board on which said photographing optical system, said solid-state image sensing element, and light amount adjustment means for performing a light amount adjusting operation to adjust a light amount of the object image are mounted on said board, and a regulation portion for regulating a position of said light amount adjustment means is arranged on said board.

34. The apparatus according to claim 33, wherein an optical path portion extending in a direction perpendicular to said board is included in an optical path formed by said photographing optical system, and said light amount adjustment means is disposed to adjust an amount of light passing through the optical path portion.