Camera shake alarming apparatus

• US 5,402,197 A
• Filed: 08/23/1993
• Issued: 03/28/1995
• Est. Priority Date: 09/04/1992
• Status: Expired due to Term

• Current Assignee: Nikon Corporation
• Original Assignee: Nikon Corporation
• Inventors: Okano, Hiroshi, Katayama, Akira, Imafuji, Kazuharu, Kai, Tadao
• Primary Examiner(s): ADAMS JR, RUSSELL E
• Application Number:
  US08/109,905
• Time in Patent Office: 582 Days
• Field of Search: 354/400-408, 354/410, 354/266, 354/289.1, 354/289.12, 354/195.1
• US Class Current: 396/55
• CPC Class Codes: G03B 17/18 Signals indicating condition of a camera member or suitability of light indicating depth of field G03B13/30
• CPC Class Codes: G03B 2205/0015 by displacing one or more optical elements normal to the optical axis
• CPC Class Codes: G03B 2217/005 Blur detection
• CPC Class Codes: G03B 2217/185 providing indication that the picture may be blurred

Abstract

A camera shake alarming apparatus comprises a storage portion for storing specification information of a camera; a subject distance detecting portion for detecting a subject distance for photographing a subject; a calculating portion for calculating an allowable camera shake quantity on the basis of a shutter speed set in the camera when photographing the subject, the camera specification information stored in the storage portion and the subject distance detected by the subject distance detecting portion; a camera shake detecting portion for detecting a camera shake quantity of the camera; a comparing portion for comparing the allowable camera shake quantity calculated by the calculating portion with the camera shake quantity detected by the camera shake detecting portion; and an alarming portion for giving an alarm for the camera shake according to a compared result of the comparison portion.

Claims

1. A camera shake alarming apparatus comprising:

storage means for storing specification information of a camera;

subject distance detecting means for detecting a subject distance for photographing a subject;

calculating means for calculating an allowable camera shake quantity based on a shutter speed set in said camera when photographing said subject, said camera specification information stored in said storage means and said subject distance detected by said subject distance detecting means;

camera shake detecting means for detecting a camera shake quantity of said camera;

comparing means for comparing said allowable camera shake quantity calculated by said calculating means with said camera shake quantity detected by said camera shake detecting means; and

alarming means for giving an alarm for the camera shake according to a comparison result of said comparing means.

2. The camera shake alarming apparatus according to claim 1, further comprising compensating means for calculating a camera shake compensation quantity based on said camera shake quantity detected by said camera shake detecting means, and for compensating the camera shake of said camera according to said camera shake compensation quantity, wherein said calculating means calculates said allowable camera shake quantity on the basis of said shutter speed set in said camera, said camera specification information stored in said storage means, said subject distance detected by said subject distance detecting means, and said camera shake compensation quantity calculated by said compensating means.

3. The camera shake alarming apparatus according to claim 1, wherein said camera specification information includes a focal length of a lens.

4. The camera shake alarming apparatus according to claim 1, wherein said camera shake quantity detected by said camera shake detecting means is an angular speed at which said camera is tilted.

5. A camera shake alarming apparatus comprising:

storage means for storing specification information of a camera;

subject distance detecting means for detecting a subject distance for photographing a subject;

calculating means for calculating an allowable shutter speed based on said camera specification information stored in said storage means and said subject distance detected by said subject distance detecting means;

comparing means for comparing a shutter speed set in said camera with said allowable shutter speed calculated by said calculating means; and

alarming means for giving an alarm for a camera shake according to a comparison result of said comparing means.