Camera with a blur warning function

• US 6,101,332 A
• Filed: 02/25/1999
• Issued: 08/08/2000
• Est. Priority Date: 03/02/1998
• Status: Expired due to Term

• Current Assignee: Olympus Optical Corporation Limited (Olympus Corporation)
• Original Assignee: Olympus Optical Corporation Limited (Olympus Corporation)
• Inventors: Satoh, Tatsuya
• Primary Examiner(s): ADAMS JR, RUSSELL E
• Application Number:
  US09/257,700
• Time in Patent Office: 530 Days
• Field of Search: 396/52, 396/55, 396/287, 396/291, 396/292
• US Class Current: 396/52
• CPC Class Codes: G03B 17/20 visible in viewfinder
• CPC Class Codes: G03B 2217/185 providing indication that the picture may be blurred
• CPC Class Codes: G03B 2217/268 Unloading the cartridge from the camera; Loading the cartridge into the camera

Abstract

The present invention provides a camera with a blur warning function which does not widely vary in feeling of use between film-loading and film-unloading. In this camera, a film loading sensing section senses whether a film is loaded or not, a focal length sensing section senses a focal length of a lens, and a camera shake sensing section senses a camera shake. In response to outputs of the film loading section, the focal length sensing section and the camera shake sensing section, a blur amount of an image formed on a film surface is computed by an image blur computing section. A blur warning section gives a warning of an image blur amount in response to an output of the image blur computing section. The information of the blur warning section is controlled by the image blur computing section in accordance with at least information of the film loading sensing section.

Claims

1. A camera with a blur warning function, comprising:

a film loading sensing section for sensing whether or not a film is loaded;

a camera shake sensing section for sensing a camera shake;

an image blur computing section for computing a blur amount

an image blur computing section for computing a blur amount of an image formed on an image forming surface in response to an output of the camera shake sensing section; and

a blur warning section for giving a warning of a blur in accordance with a computation result of the image blur computing section;

wherein the image blur computing section changes the computation result in accordance with a detection result of the film loading sensing section; and

wherein the camera further comprises a focal length sensing section for sensing a focal length of a lens, and the image blur computing section computes the blur amount of the image formed on the image forming surface in response to an output of the focal length sensing section and the output of the camera shake sensing section based on the detection result of the film loading sensing section.

2. The camera according to claim 1, wherein the image blur computing section changes the computation result when the film loading sensing section senses that the film is not loaded.

3. A camera with a blur warning function, comprising:

a film loading sensing section for sensing whether or not a film is loaded;

a camera shake sensing section for sensing a camera shake;

a blur computing coefficient determination section for determining a predetermined blur computing coefficient in accordance with a detection result of the film loading section;

an image blur computing section for computing a blur amount of an image formed on an image forming surface in response to an output of the camera shake sensing section and the blur computing coefficient; and

a blur warning section for giving a warning of a blur in accordance with a computation result of the image blur computing section;

wherein the camera further comprises a focal length sensing section for sensing a focal length of a lens, and the image blur computing section computes the blur amount of the image formed on the image forming surface in response to an output of the focal length sensing section, the output of the camera shake sensing section, and the blur computing coefficient.

4. The camera according to claim 3, wherein the blur computing coefficient determined by the blur computing coefficient determination section is larger when the film is not loaded as compared to when the film is loaded.

5. A camera with a blur warning function, comprising:

a film loading sensing section for sensing whether or not a film is loaded;

a camera shake sensing section for sensing a camera shake;

an image blur computing exposure time determination section for determining computing exposure time information in accordance with a detection result of the film loading sensing section;

an image blur computing section for computing a blur amount of an image formed on an image forming surface in response to an output of the camera shake sensing section and the blur computing exposure time information; and

a blur warning section for giving a warning of a blur in accordance with a computation result of the image blur computing section;

wherein the camera further comprises a focal length sensing section for sensing a focal length of a lens, and the image blur computing section computes the blur amount of the image formed on the image forming surface in response to an output of the focal length sensing section, the output of the camera shake sensing section, and the computing exposure time information.

6. A camera with a blur warning function, comprising:

a film loading sensing section for sensing whether or not a film is loaded;

a camera shake sensing section for sensing a camera shake;

an image blur computing exposure time determination section for determining computing exposure time information in accordance with a detection result of the film loading sensing section;

an image blur computing section for computing a blur amount of an image formed on an image forming surface in response to an output of the camera shake sensing section and the blur computing exposure time information; and

a blur warning section for giving a warning of a blur in accordance with a computation result of the image blur computing section;

wherein the camera further comprises a focal length sensing section for sensing a focal length of a lens, and the image blur computing exposure time determination section determines the computing exposure time in accordance with the focal length when the film loading sensing section senses that the film is not loaded.

7. A camera, with a blur warning function, comprising:

a film loading sensing section for sensing whether or not a film is loaded;

a camera shake sensing section for sensing a camera shake;

an image blur computing exposure time determination section for determining computing exposure time information in accordance with a detection result of the film loading sensing section;

an image blur computing section for computing a blur amount of an image formed on an image forming surface in response to an output of the camera shake sensing section and the blur computing exposure time information; and

a blur warning section for giving a warning of a blur in accordance with a computation result of the image blur computing section;

wherein the camera further comprises a flash emitting section for emitting a flash, and the computing exposure time information corresponds to flashing time when the flash emitting section emits a flash.

8. A camera with a blur warning function, comprising:

a flash emitting section capable of emitting a flash;

an exposure condition determination section for determining whether a flash is emitted or not;

a camera shake sensing section for sensing a camera shake;

an image blur computing exposure time determination section for determining computing exposure time information in response to an output of the exposure condition determination section;

an image blur computing section for computing a blur amount of an image formed on an image forming surface in response to an output of the camera shake sensing section and the computing exposure time information; and

a blur warning section for giving a warning of a blur in accordance with a computation result of the image blur computing section.

9. The camera according to claim 8, wherein the computing exposure time information corresponds to flashing time when the exposure condition determination section determines that a flash is emitted.