Image pickup device

Details Image pickup device Image pickup device

2004-02-19

2008-11-25

Ye, Lin (Department: 2622)

Television

Special applications

Flaw detector

C348S125000, C361S144000

Reexamination Certificate

active

07456859

ABSTRACT:
The present invention is an image pickup device provided with a CMOS camera which is provided with a telecentric lens to photograph a sample put in a levitation state at the center inside an electrostatic levitation furnace, a metal halide light source which is positioned on the opposite side of the sample from the CMOS camera to irradiate light with a wavelength of 400 to 450 nm toward the sample, and a digital signal processor which performs image processing for enhancing an edge of an image captured by the CMOS camera in real time to output a position of center of gravity of the sample put in the levitation state, where a blue filter is attached to the CMOS camera. Even if the sample becomes incandescent due to a high temperature, contrast of the sample against a background can be obtained by the image pickup device. In addition, position information required for levitation control of a sample with a complicated shape is outputted by the image pickup device so that an instant at which the sample with a complicated shape changes to a spherical shape one can be specified visually.

REFERENCES:
patent: 4121292 (1978-10-01), Galanis et al.
patent: 5155651 (1992-10-01), Yoda et al.
patent: 5917602 (1999-06-01), Bonewitz et al.
patent: 54-15768 (1979-02-01), None
patent: 11-90658 (1999-04-01), None
patent: 2002-206865 (2002-07-01), None

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