Image magnification control device for a camera

Details Image magnification control device for a camera Image magnification control device for a camera

1997-05-30

1998-11-03

Gray, David M.

Photography

Having variable focal length of camera objective

Automatic change of focal length

396 79, G03B 1300

Patent

active

058323163

ABSTRACT:
An image magnification control device for a camera. Control focal length required to maintain an image magnification constant is computed based upon defocus information detected by analyzing a light that passes through a photographic lens. In case a focal length of the photographic lens moves out of a range wherein the set image magnification can be obtained, various options, such as a shutter-release lock operation, can be executed depending upon the chosen design of the camera.

REFERENCES:
patent: 4145732 (1979-03-01), Pandres, Jr.
patent: 4156933 (1979-05-01), Pandres, Jr.
patent: 4446526 (1984-05-01), Iwande
patent: 4491396 (1985-01-01), Isobe et al.
patent: 4500778 (1985-02-01), Kusaka et al.
patent: 4508443 (1985-04-01), Matsuzaki et al.
patent: 4509842 (1985-04-01), Taniguchi et al.
patent: 4550993 (1985-11-01), Taniguchi et al.
patent: 4560267 (1985-12-01), Nakai et al.
patent: 4623238 (1986-11-01), Taniguchi et al.
patent: 4705380 (1987-11-01), Yamamoto et al.
patent: 4717933 (1988-01-01), Ando et al.
patent: 4724454 (1988-02-01), Misawa
patent: 4733262 (1988-03-01), Taniguchi et al.
patent: 4774540 (1988-09-01), Taniguchi et al.
patent: 4857951 (1989-08-01), Nakajima et al.
patent: 4908643 (1990-03-01), Tamada et al.
patent: 4935763 (1990-06-01), Itoh et al.
patent: 4951075 (1990-08-01), Tokumaru et al.
patent: 4962400 (1990-10-01), Otani et al.
patent: 4969044 (1990-11-01), Hijikata et al.
patent: 5063402 (1991-11-01), Shimada et al.
patent: 5065176 (1991-11-01), Taniguchi et al.
patent: 5093680 (1992-03-01), Suzuki et al.
patent: 5113209 (1992-05-01), Ueyama et al.
patent: 5142318 (1992-08-01), Taniguchi et al.
patent: 5159377 (1992-10-01), Suzuki et al.
patent: 5247326 (1993-09-01), Taniguchi
patent: 5283607 (1994-02-01), Suzuki et al.
patent: 5428419 (1995-06-01), Suzuki et al.
patent: 5541702 (1996-07-01), Suzuki et al.
Copy of a European Search Report issued with EP App. No. 96 105375.8, dated Dec. 29, 1997.
Copy of a European Search Report issued with EP App. No. 96 105374.1, dated Dec. 29, 1997.
Copy of a European Search Report issued with EP App. No. 96 105376.6, dated Dec. 29, 1997.
Copy of a European Search Report issued with EP App. No. 96 1-6034.7, dated Jan. 5, 1998.
English Language Abstract of JP 1-131509.
English Language Abstract of JP 1-123026.
English Language Abstract of JP 1-99012.
English Language Abstract of JP 1-99011.
English Language Abstract of JP 64-79713.
English Language Abstract of JP 64-62608.
English Language Abstract of JP 64-56406.
English Language Abstract of JP 64-44429.
English Language Abstract of JP 64-44428.
English Language Abstract of JP 63-220118.
English Language Abstract of JP 63-5331.
English Language Abstract of JP 63-200340.
English Language Abstract of JP 62-133431.
English Language Abstract of JP 62-133430.
English Language Abstract of JP 62-118328.
English Language Abstract of JP 61-230111.
English Language Abstract of JP 61-38917.
English Language Abstract of JP 61-26015.
English Language Abstract of JP 53-113527.
Infinity Super Zoom 300 Camera Instruction Manual, p. 67, published Jul. 1988.
A Copy of an Office Action issued by the European Patent Office on Aug. 11, 1994.
An English Language Abstract of JP-A-60 001602.
A Copy of a Search Report issued by the European Patent Office with EPo 94 10 8436.
Patent Abstracts of Japan, vol. 10, No. 195 (P-475) (2251), Jul. 9, 1986.
A Copy of a Search Report issued by the European Patent Office with EPO 94 10 6154.
Patent Abstracts of Japan, vol. 9, No. 33 (P-334) (1756), Feb. 13, 1985.

Affiliated with

Also associated with

Rating

Image magnification control device for a camera does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image magnification control device for a camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image magnification control device for a camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-702748