Switchable magnification lens and photographic apparatus...

Details Switchable magnification lens and photographic apparatus... Switchable magnification lens and photographic apparatus...

2009-06-22

2010-11-30

Spector, David N (Department: 2873)

Optical: systems and elements

Lens

Selective magnification by exchanging or adding a lens...

C359S672000, C348S360000, C396S071000

Reexamination Certificate

active

07843646

ABSTRACT:
A switchable magnification lens used to vary the magnification of an image going to be captured by a camera. The switchable magnification lens includes an outer barrel and a switchable magnification unit detachably arranged in the outer barrel and connected to the zoom lens. The image will be magnified while passing through the switchable magnification unit from a first end to a second end, and the image will be shrunk while passing through the switchable magnification unit from the second end to the first end. The switchable magnification unit is able to change its orientation with respect to the outer barrel. The image will be magnified while the first end is away from the camera and the second end is toward the camera, and the image will be shrunk while the first end is toward the camera and the second end is away from the camera.

REFERENCES:
patent: 4426135 (1984-01-01), Hashiya
patent: 5452133 (1995-09-01), Margolis
patent: 5528416 (1996-06-01), Hartmann
patent: 5600751 (1997-02-01), Peli
patent: 6008845 (1999-12-01), Ohyoshi
patent: 2009/0135287 (2009-05-01), Yang
patent: 2009/0180019 (2009-07-01), Yang
patent: 2010/0091380 (2010-04-01), Yang

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