55 results about "Semi-minor axis" patented technology

A device having an inner surface with a combination of reflective and refractive surface facets swept about an axis of revolution perpendicular to the optical axis of the device. The outer surface has a non-planar, non-circular, non-spherical shape. This outer surface generates an appropriate intensity distribution in a direction generally parallel to the major axis of the output rectangle and may also distribute energy generally parallelly to the minor axis of the output rectangle as well.

The invention relates to an ultrasound diagnostic device. A diagnostic coordinate system specified by a first axis through a third axis is a coordinate system based on a major axis and a minor axis of a follicle F, and the starting point is at the position of the center of gravity of the follicle (F). The display coordinate system is an XYZ coordinate system. The diagnostic coordinate system is moved in parallel to the display coordinate system from (A) until the starting points are aligned at (B). The diagnostic coordinate system is then rotated until the first axis of the diagnostic coordinate system corresponding to the major axis of the follicle F overlaps the x-axis where the angle with the first axis is smallest, at (C). Additionally, the diagnostic coordinate system is rotated until the second axis of the diagnostic coordinate system corresponding to the minor axis of the follicle F overlaps the z-axis where the angle with the second axis is smallest, at (D). A tomographic image of the follicle F is formed by an image in a plane that includes the z-axis and the x-axis, an image in a plane that includes the y-axis and the z-axis, and an image in a plane that includes the x-axis and the y-axis.

An imaging device includes a separability calculating portion for calculating a separability of a frame image by filtering the frame image containing a ball image elliptically deformed using an ellipse separability filter having an inside region and an outside region located outside of the inside region, an estimating portion for estimating a set of a center position, major axis, minor axis and inclination angle of the inside region, the set resulting in a maximum separability by changing the center position, major axis, minor axis and inclination angle of the inside region, as a set of a center position, major axis, minor axis and inclination angle of the ball image, and a speed calculating portion for calculating a speed of the ball based on a difference between the center positions of the ball images estimated by the estimating portion, a number of frames between the frame images and a frame rate.

A machine tool is provided with a tool magazine including a guiding plate, a turntable and holders. The guiding plate includes an annular groove with a semi-circular section and a semi-oval section. The semi-circular section is defined by a radius. The semi-oval section is defined by a semi-major axis identical to the radius of the semi-circular section and a semi-minor axis shorter than the semi-major axis. The turntable includes claws extending from the periphery. Each of the holders is pivotally connected to a related one of the claws and includes an end for holding a tool and another end formed with a ball movably located in the annular groove. Thus, some of the holders of which the balls are located in the semi-circular section of the annular groove close while the other holders of which the balls are located in the semi-oval section of the annular groove open.

An optical plate includes a main body plate, and a plurality of lens patterns formed on a first surface of the main body plate, wherein the lens patterns are elongated in a first direction and arranged in parallel with each other in a second direction crossing the first direction, wherein a cross section of the lens patterns form a part of an ellipse shape, the ratio of a semi-major axis to a semi-minor axis of the ellipse shape ranging from about 1.65 to about 1.75.

The invention discloses a radar three-dimensional imaging method and a system based on an ellipsoid tangent point envelope surface. The method comprises the following steps : dividing a transmitting-receiving antenna; moving the transmitting-receiving antenna by an interval in m*n antenna coordinate matrix scanning domains at a delta t time interval to obtain m*n groups of electromagnetic echo data; respectively taking a transmitting-receiving antenna coordinate as an elliptic focus, a target body reflection echo path length as an elliptical major axis and constructing m*n ellipses and respectively obtaining each elliptical semi-minor axis; constructing m*n ellipsoids to form an ellipsoid set by using an ellipsoid equatorial radius which takes an elliptical semi-major axis as the axis X and the axis Y and an ellipsoid polar radius which takes the elliptical semi-minor axis as the axis Z; constructing an envelope surface which is tangent to each ellipsoid of the ellipsoid set, selecting the envelope surface which envelopes a tangent point in the maximum axis Z direction, and in the envelope surface which envelopes the tangent point in the maximum axis Z direction, taking the envelope surface composed of geometric centers in any of all of the adjacent four adjacent tangent points as a target body boundary to realize imaging. The method and the system disclosed by the invention have strong anti-noise property, can improve the imaging speed and accuracy, and satisfy requirements of real-time application.