Samsung Electronics Co., Ltd.

Jun-bo Kim

Jae-hyun Jung

Won Suk Choi

Hyeong-Cheol Kim

Hyoung-Jo Jeon

Jae-Wan Kim

Yong-Won Kim

Kwang-Jun Yoon

Hyun-Kwon Jung

Seung-Hwan Choi

Kyoung-mu Lee

Min Woo Hong

Young-su Ryu

Young-Jun Roh

Hyung-Suck Cho

A coma aberration correcting apparatus of an optical pickup includes an optical pickup main body having a photo diode, and an actuator mounted on an objective lens focusing a beam emitted from the photo diode onto a recording medium. The coma aberration correcting apparatus includes a main supporting unit, a holding unit, an optical system, a driving part, and a controller. The main supporting unit detachably supports the optical pickup main body. The holding unit holds and releases the actuator on the optical pickup main body supported by the main supporting unit. The optical system magnifies and photographs the beam emitted from the photo diode through the objective lens of the actuator held by the holding unit. The driving part adjusts a position of the actuator relative to the optical pickup main body. The controller controls the driving part to correct the coma aberration of the objective lens.

Coma aberration correcting apparatus for optical pickup

A radioactive image apparatus and a method of controlling a focus thereof. The radioactive image apparatus includes a radioactive ray generating unit, a robot table, and a radioactive ray detecting unit. The focus control method includes obtaining a radioactive transmission image of a test pattern, defining a circle with a given radius in the radioactive transmission image of the test pattern, detecting values of pixels located on a circumference of the circle, calculating the standard deviation of the values of the pixels located on the circumference of the circle, and determining the radius of the circle to be an index factor of a resolution in response to the calculated standard deviation being smaller than a preset threshold value.

Radioactive image apparatus and focus control method thereof

A method of reconstructing a tomogram of an X-ray apparatus. The tomogram reconstructing method includes obtaining model information and a transmission image of a subject. A tomogram is reconstructed from the transmission image using the model information. The reconstructed tomogram obtained is then displayed.

Method of reconstructing a tomogram of an X-ray apparatus

Disclosed herein is a three-dimensional image constructing method using an X-ray apparatus. In the three-dimensional image constructing method, a construction space of a subject and information for the construction space are set. Thereafter, a plurality of transmission images of the subject are obtained. The data of the construction space are calculated on the basis of the information for the construction space set at the setting step and the transmission images obtained at the image obtaining step. The construction space is constructed on the basis of the data calculated at the image processing step.

Three-dimensional image constructing method using X-ray apparatus

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Seoul, South Korea

Jun-bo Kim