WO2005096867A1 - オーバルカットしたダイヤモンド - Google Patents
オーバルカットしたダイヤモンド Download PDFInfo
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- WO2005096867A1 WO2005096867A1 PCT/JP2005/005491 JP2005005491W WO2005096867A1 WO 2005096867 A1 WO2005096867 A1 WO 2005096867A1 JP 2005005491 W JP2005005491 W JP 2005005491W WO 2005096867 A1 WO2005096867 A1 WO 2005096867A1
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- WIPO (PCT)
- Prior art keywords
- girdle
- facet
- facets
- pavilion
- crown
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C17/00—Gems or the like
- A44C17/001—Faceting gems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
- H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
- H04M1/0235—Slidable or telescopic telephones, i.e. with a relative translation movement of the body parts; Telephones using a combination of translation and other relative motions of the body parts
- H04M1/0237—Sliding mechanism with one degree of freedom
Definitions
- the present invention relates to cutting diamonds, and more particularly to cutting diamonds having an oval girdle and having a strong reflected light.
- a round brilliant cut is generally used as a diamond cut.
- Round brilliant diamonds have a regular octagonal table facet on the top of the crown, eight crown main facets, eight star facets and 16 uppers on the outer circumference of the crown between the table facet and the girdle. With girdle facets.
- the present inventors have introduced a concept of "amount of visual perceived reflected light" in a round brilliant cut diamond to evaluate the magnitude of shine that can be perceived by an observer when observing the diamond.
- a cut design that can increase the amount of visual perceived reflected light has been invented, and a patent application has been made for the cut design, which has been published as Patent Document 1.
- the diamond was cut into a mesh in which the radius of the diamond was divided into 100, and the light amount density of each mesh was determined. Since diamond has a radius of several millimeters, each mesh is several hundreds / zm 2 .
- calculate the square root of the physical reflection light amount 10 as a unit for each pattern, and calculate that value for all patterns. The sum was obtained as the amount of the visual perceived reflected light. That is, the amount of visual perceived reflected light ⁇ ⁇ (the amount of physically reflected light for each pattern of 30 mesh or more.
- Opal-cut diamonds As a modification of the round brilliant cut, there is an opal-cut diamond in which the girdle is elliptical. Opal-cut diamonds also have a crown at the top of the girdle, a pavilion at the bottom of the girdle, and a table facet at the top of the crown. Opal-cut diamonds that are not symmetrical about the central axis are commonly used.
- Opal-cut diamonds that are not symmetrical with respect to the central axis have low reflected light brilliance. In some cases, round brilliant cuts are flattened in one direction. For example, see Non-Patent Document 1.
- Opal cut diamonds have a girdle that becomes an opal, a crown that is provided at the top of the girdle, has a table facet at the top, and a pavilion at the bottom of the girdle. Both the crown and papillion in the oval brilliant cut have been modified by replacing the circular girdle in the round brilliant cut with an oval girdle.
- the oval brilliant cut pavilion the intersection between the oval girdle and the major and minor axes of the girdle, and the adjacent bisector that almost halves the angle between the major and minor axes, and the girdle
- the pavilion has two adjacent pavilion areas surrounded by a main facet and a girdle There are 16 elliptical sectors or approximately triangular lower girdle facets.
- the pavilion angle of the pavilion main facet on the short axis side is smaller than the pavilion angle of the pavilion main facet provided on the long axis side (the angle between the pavilion main facet and the table facet). Became larger, and the pavilion angle of the pavilion main facet provided between the major axis and the minor axis was halfway between those pavilion angles.
- the angle formed by the table facet of the lower girdle facet on the short axis side was larger than the angle formed by the lower girdle facet on the long axis side.
- the crown main facet (sometimes referred to as “bezel facet”) can have the same radial length and crown angle.
- the oval brilliant cut diamond had a difference between the eight pavilion angles, with the eight crown angles being approximately the same. Also, the angle between the 16 face waggle and the facet was different from that of the table facet.
- the pavilion main facet provided on the long axis side has a small pavilion angle.
- the pavilion main facet provided on the short axis side has a large pavilion angle, so the pavilion main facet provided between the long axis and the short axis.
- the direction of the central axis is different.
- the pavilion angle has a different value and the lower girdle facet angle has a different value, and there are facets that are not oriented in the direction of the central axis.
- the light reflected by the facets and the light pattern emerging from those surfaces are not uniform because the directions of the light reflected from those surfaces are the same, and are not uniform. It was a reflection pattern that was difficult to identify, and had low brightness in crown facets and table facets.
- the present inventors have determined the amount of reflected light using the "amount of visually perceived reflected light” introduced in the above patent application.
- the “effective perceptual reflected light amount” for light incident at 20-45 ° and the “visual perception determined from the weighted incident light intensity using the cos 2 ⁇ of the incident angle ( ⁇ ) of the incident light The arithmetic average with "the amount of reflected light” was defined as "reflection evaluation index”. This reflection evaluation finger Using the number, the intensity of the reflected light and the brightness of the opaline cut were examined.
- Patent Document 1 JP 2003-310318 A
- Non-patent document 1 "GIA DIAMOND DICTIONARY", 3rd edition, published by the American Gemmological Society, USA, 1993, pp. 167-168
- an object of the present invention is to provide an opal-cut diamond that has a strong reflected light when observed at the upper part of the table.
- the opal-cut diamond of the present invention includes a columnar girdle, a crown provided at the top of the girdle and having an octagonal table facet at the top, and a pavilion provided at the bottom of the girdle.
- the girdle has an upper ridge between the crown and a lower ridge between the pavilion.
- the outline of the girdle section parallel to the table facet is elliptical or similar to an ellipse.
- the diamond has a central plane that includes the major axis of the contour and has a plane force perpendicular to the table facet, and a central axis that is on the central plane and has a linear force perpendicular to the table facet at the center of the major axis of the contour of the girdle section. And a circumscribed circle consisting of a circle circumscribing the contour at at least one long-axis end of the contour about the central axis.
- the diamond has a central plane of the diamond, a plane having the minor axis of the contour line of the girdle cross section, and the central axis of the diamond, and an angle formed by the plane and the central plane around the central axis. It has an octant plane consisting of planes that divide equally. It also has a second octant that bisects the angle formed by the two adjacent octants about the central axis.
- the table facet has two opposing vertices on the center plane, and the other six vertices of the table facet symmetric with respect to the center plane.
- the crown is composed of eight quadrilateral crown main facets, eight triangular star facets, and sixteen upper girdle facets around the upper edge of the girdle and the table facet.
- Each of the crown main facets has a point at which each of the eight dividing planes intersects the upper edge of the girdle and each vertex of the table facet as a vertex! /, It is a quadrilateral that shares the other vertices with each of the adjacent crown main facets.
- Each star facet has each side of the table facet as the base
- Each upper girdle facet is a triangular or elliptical sector that has a vertex on the upper edge of the girdle, with the side of the crown main facet having one end on the upper edge of the girdle.
- the pavilion has a lower vertex at the lower end of the center axis of the diamond, and eight pavilion main facets and 16 lower guard facets around the lower vertex and the lower edge of the girdle.
- Each of the pavilion main facets has a quadrilateral or partial quadrilateral extending around the lower vertex and the lower edge of the girdle toward the point where each of the second octants intersects the lower edge of the girdle.
- the pavilion main facet shares a side with the lower vertex as one end between adjacent pavilion main facets, and each of the pavilion main facets has an intersection point between each of the second octant planes and the circumscribed circle. And the lower vertex as the opposite vertex.
- the lower girdle facet is formed between the virion main facet and the lower edge of the girdle.
- Each lower girdle facet is a triangular or elliptical sector that has a vertex on the lower edge of the girdle, with the side having one end on the lower edge of the girdle as the bottom side of the side face of the main facet of the pavilion.
- the main facet has one said lower girdle facet on each side.
- the ellipse or the shape similar to the ellipse formed by the contour line of the girdle cross section has a major axis radius (hereinafter referred to as "major axis") a, and a minor axis direction radius (hereinafter “minor axis”).
- major axis major axis radius
- minor axis minor axis direction radius
- each of the pavilion main facets can have substantially the same pavilion angle with the table facet.
- each pair of pavilion main facets and the table facet have a common vertical plane in their facets.
- Two crown members opposite each other with respect to the central axis For each crown main facet pair consisting of two facets, it is necessary that each crown main facet pair and table facet have a common vertical plane in their facets.
- the crown main facet has substantially the same crown angle with the table facet.
- the pavilion angle that each pavilion main facet has with the table facet and the crown angle that each crown main facet has with the table facet are represented by a pavilion angle (p) on the horizontal axis, and a vertical axis.
- the girdle has substantially the same girdle height over the entire circumference, and the facets of the pavilion except for the lower girdle facet adjacent to the major axis have respective facets and girdle lower ridges. It is preferable to have an adjustment surface having an angle larger than the pavilion angle with the table facet between the facets, and to form a ridge between the respective facets and the adjustment surface. ,.
- the center axis of the diamond passes through the center of the long axis of the contour of the cross section of the guardle.
- the contour of the girdle cross-section parallel to the table facet is elliptical.
- the present invention refers to a marquise having a girdle cross-section having a contour formed by intersecting two elliptical arcs (or a circular arc which is a kind of elliptic arc) in a table facet parallel. It can be applied to diamonds.
- the present invention is called a pair shape in which a girdle cross section parallel to the table facet has a contour formed by intersecting three elliptical arcs (or an arc that is a kind of elliptical arc). It can be applied to diamonds.
- the opal-cut diamond of the present invention when observed from above the table, The radiance of the light is strong and tangible! Compared to diamonds with round brilliant cuts flattened in one direction, the brightness is about 200-300% stronger. Also, since the guard unit can be set to substantially the same value over the entire circumference of the girdle, the appearance can be improved.
- FIG. 1 shows a top view of an hornlessly cut diamond according to Example 1 of the present invention.
- FIG. 2 shows a bottom view of an hornlessly cut diamond according to Example 1 of the present invention.
- FIG. 3 shows a front view of an hornless-cut diamond according to Example 1 of the present invention.
- FIG. 4 shows a side view of an hornless recut diamond according to Example 1 of the present invention.
- FIG. 5 is a diagram illustrating an optical path using a cross-section of an opal-cut diamond of Example 1.
- FIG. 6 is a diagram showing an optical path using the cross section of the opal-cut diamond of Example 1.
- FIG. 7 shows a top view of an opal-cut diamond according to Example 2.
- FIG. 8 shows a bottom view of an opal-cut diamond according to Example 2.
- FIG. 9 shows a front view of an opal-cut diamond according to Example 2.
- FIG. 10 shows a side view of an opal-cut diamond according to Example 2.
- FIG. 11 shows a top view of an opal-cut diamond according to Example 3.
- FIG. 12 shows a bottom view of an opal-cut diamond according to Example 3.
- FIG. 13 shows a front view of an opal-cut diamond according to Example 3.
- FIG. 14 shows a side view of an opal-cut diamond according to Example 3.
- FIG. 15 is a diagram illustrating an optical path using a cross section of an opal-cut diamond according to Example 3.
- FIG. 16 is a diagram illustrating an optical path using a cross section of an opal-cut diamond according to Example 3.
- FIG. 17 shows a top view of an opal-cut diamond of a comparative example.
- FIG. 18 shows a bottom view of an opal-cut diamond of a comparative example.
- FIG. 19 shows a front view of an opal-cut diamond of a comparative example.
- FIG. 20 shows a side view of an opal-cut diamond of a comparative example.
- FIG. 21 is a graph showing the relationship between the reflection evaluation index and the minor axis ratio (bZa) for the opal-cut diamond of Example 3 of the present invention and the opal-cut diamond of Comparative Example.
- FIG. 22 is a graph showing a region of a pavilion angle (p) and a crown angle (c) having a reflection evaluation index, preferably, in an opal-cut diamond of the present invention.
- FIG. 23 is a schematic diagram illustrating a method of observing an opal-cut diamond.
- the opal-cut diamond of the present invention is described in detail based on the drawings showing Example 1.
- FIG. 1 is a top view of an hornlessly cut diamond according to Example 1 of the present invention
- FIG. 2 is a bottom view
- FIG. 3 is a front view
- FIG. 4 is a side view.
- the opal-cut diamond 100 has a columnar girdle 110, a crown 120 at the top of the girdle 110, and a pavilion 140 at the bottom of the girdle 110.
- Crown 120 has an octagonal table facet 122 at its top.
- FIG. 1 shows the crown 120 viewed from the top
- FIG. 2 shows the pavilion 140 also viewed from the bottom.
- the oval brilliant cut diamond has a girdle having an opal cross section, a crown provided at the top of the girdle, a table facet at the top, and a pavilion at the bottom of the girdle.
- the girdle has an upper ridge between the crown and a lower ridge between the pavilion. Both the crown and pavilion in the oval brilliant cut have a shape in which the circular girdle in the round brilliant cut is replaced with an oval girdle.
- the girdle 110 of the opal-cut diamond of Example 1 has an elliptical cross section parallel to the table facet.
- the present invention is not limited to diamonds having a girdle cross section that is not only an elliptical girdle section but also a table facet and a diamond having a parallel girdle cross section with an elliptical or elliptical contour, such as Marquise and Pearshape. Applicable.
- a plane that includes the major axis of the contour of the girdle cross section and that is perpendicular to the table facet is a central plane, and the center of the major axis of the contour, that is, an octagon on the central plane.
- the center axis of the center of the table facet 122 with the center is defined by the z-axis. It is assumed that the origin of the z-axis is on the upper cross section of the girdle, that is, the cross section between the crown and the girdle.
- Origin Force Draw the X axis in the major axis direction of the girdle, and draw the Y axis in the minor axis direction of the origin force girdle. Then draw a bisector that bisects the angle between the major axis and the minor axis.
- a plane including the central axis (z axis) and extending in the directions of the X axis, the bisector, and the y axis is called an octant plane 170.
- a plane that bisects the angle formed between the adjacent octant planes 170 around the central axis (z axis) is called a second octant plane.
- the one between the X axis and the bisector is converted to the second octant 18 (between the bisector and the y-axis of the second octant).
- One is the second octant plane 18CT.
- two opposing vertices 123 of table facet 122 are respectively on octant plane 170 in the X-axis direction and on octant plane in the X-axis direction.
- the other six vertices 124 and 125 are symmetrical with respect to the center plane.
- the two vertices 124 are on the octant plane 170 including the y-axis because the table facet 122 is symmetric about the y-axis.
- the crown 120 has eight quadrilateral crown main facets 126, eight triangular star facets 132, and sixteen upper girdle facets 136.
- the two opposing vertices 123 of the table facet 122 are substantially the same distance from the central axis (z axis) in the X-axis direction (long axis direction) on the central plane, and the two opposing vertices 124 are away from the central axis.
- each of the other four vertices 125 divides the angle between the long axis and the short axis into two bisecting directions, not necessarily the second
- the central axial force is also at substantially the same distance.
- Each of the crown main facets 126 has a pair of vertices 127, 129, and 128 where each of the octant planes 170 intersects the upper ridge of the girdle 110, and vertices 123, 125, and 124 of the table facet 122, They are 127 and 123, 129 and 125, and 128 and 124, and are quadrilaterals sharing another vertex 121 with the adjacent crown main facet 126.
- Each of the crown main facets 126 intersects perpendicularly with the octant plane. Also, it is preferable that the angle (crown angle (c)) that the crown main facet has with the table facet is the same for the eight crown main facets.
- a plane which intersects perpendicularly with the octant plane and has the same angle with the table facet is formed so as to pass through each vertex of the table facet.
- the point at which the line of intersection of the plane and the octant plane intersects the girdle can be the vertex on the girdle of the crown main facet.
- the crown main facet 126 that divides the angle between the X axis and the y axis into two equal parts, it intersects perpendicularly with the octant plane in the direction that bisects the angle between the X axis and the y axis.
- a plane having a predetermined crown angle is formed to pass through the vertex 125 of the table facet.
- a point 129 where the line of intersection of the plane and the eight-partition plane 170 intersects the girdle 110 is defined as the vertex on the girdle.
- crown main facet 126 has opposing vertices 125 and 129.
- Other 7 Crows The main facet 126 is formed similarly.
- the point where the depth from the table facet is the same on the line of intersection of adjacent crown main facets is vertex 121.
- the eight quadrangular crown main facets 126 thus formed intersect perpendicularly with the octant plane, and all the crown main facets have the same crown angle (c).
- Each of the star facets 132 has each side (for example, line segment 123-125) of the table facet 122 as a base, and has a vertex at both ends 123 and 125 of that side (for example, 123-125). It is a triangle having a point 121 as a vertex which is shared by two adjacent crown main facets 126 and 126.
- Each of the upper girdle facets 136 has a side (for example, 127-121) having one end (for example, 127) on the upper ridge of the girdle 110 among the side edges of the crown main facet 126 as a base, and a girdle upper ridge. It has a vertex at the top (eg 138). It usually has a triangular shape, but as shown in the figure, the line of intersection with the girdle may be an elliptical arc, which may be one elliptical sector. In this example, two upper girdle facets 136 are adjacent to each other with a line connecting the intersection of the eight dividing plane 170 and the girdle 110 and the vertex 121 shared by the adjacent crown main facet as a boundary.
- pavilion 140 has a lower vertex 162, ie, a curette, at the lower end of the central axis.
- the pavilion 140 has a substantially elliptical cone shape between the lower vertex 162 and the lower ridge of the girdle 110, and has eight pavilion main facets 142, 144 and 16 lower girdle facets on its outer periphery.
- the opal-cut diamond 100 of the present invention is a comparative example.
- the pavilion main facet and lower girdle facet are provided at a position where the pavilion 840 is turned 22.5 ° (1 Z16 rotation) around the central axis (z axis). Therefore, it can be said that the diamond of the present invention is a deformed opal cut.
- Each of the pavilion main facets 142, 144 extends from the lower vertex 162 in the direction of the second octant plane 18 (, 180g) between the lower vertex 162 and the lower ridge of the girdle 110, Both the pavilion main facet 142 extending in the second octant plane 18 (direction) and the pavilion main facet 144 extending in the second octant plane 180 form a quadrilateral or partial quadrilateral.
- 142 shares a side 186 with the lower vertex 162 as one end between adjacent pavilion main facets 144.
- the pavilion main facet 142 is adjacent to the pavilion main facet 1 via the X axis. Share a side 186 (extending in the x-axis direction!
- Each lower girdle facet is formed between the pavilion main facets 142, 144 and the lower ridge of the girdle 110 on the outer peripheral surface of the pavilion elliptic cone, and the girdle facet of the side of the pavilion main facet is formed.
- a circumscribed circle 147 circumscribing the girdle at both ends of the long axis of the girdle 110 is drawn with the center axis as the center (see FIG. 2).
- the second octant plane 18 (180 "each intersects the circumcircle 147 and the points 153 'and 153.
- the pavilion main facets 142 and 144 each have the lower vertex 162 and the points 153' and 153 ⁇ as the opposite vertices.
- Each of the pavilion main facets 142 and 144 shares the side 186 with one end at the lower vertex 162 and the other end 187 of the side 186 with the adjacent pavilion main facet.
- the pavilion main facet has a diagonal line connecting the point on the circumference of the circumscribed circle 147 and the lower vertex 162 as opposite vertices, and the angle formed by the diagonal line with the table facet (pavilion angle) is substantially the same.
- the minor axis of the girdle 110 is smaller than the radius of the circumscribed circle 147, so the direction of the second octant plane 180 "close to the minor axis is Pavilion
- the girdle-side tip of the pavilion main facet 142 in the direction of the second octant plane 18 (close to the long axis) is slightly cut off as well.
- Each lower girdle facet (eg, 152b 152c), as shown in FIG.
- the lower girdle facet has a point 156 as a vertex at a point 156 where a plane (octant plane) 170 bisecting an angle formed by two adjacent second octant planes 180'180 "intersects the girdle 110.
- the lower girdle facet (eg, 152b 152c) is a triangular or elliptical sector sandwiched between line segments 187-153 '(or 187-153) and line segments 156-187.
- each of the pavilion main facets 142 and 144 connects the lower apex point 162 of the central axis to the points 153 'and 153 on the circumcircle 147, so that each of the pavilion main facets is a second one. It intersects perpendicularly with the octant plane and has the same angle (pavilion angle (p)) between each pavilion main facet and the table facet 122.
- the structure of the crown 120 is such that each of the eight crown main facets intersects perpendicularly with the octant plane and makes the same angle (crown angle (c)) with the table facet 122.
- the girdle height is not the same over the entire circumference of the girdle.
- the long axis has a small girdle light, and the short axis has a large girdle light.
- a line connecting the points at which the ridges between the adjacent girdle facets and the ridges between the girdle facet and the crown main facet sequentially intersect the girdle is substantially a straight line 112.
- the pavilion main facets 142 and 144 have a diagonal line connecting the lower vertex and the point on the circumcircle 147, the ellipse girdle 110 is closer to the circumcircle 147 in the pavilion main facet 142 near the X axis.
- the pavilion main facet 144 near the y-axis they intersect at a position away from the circumcircle 147 in the z-axis direction. Therefore, as shown in Figs. 3 and 4, the girdle height is small on the long axis side and large on the short axis side.
- the midpoint between the bisectors between the X axis and the y axis is Become.
- the minor axis ratio (bZa ) Must be 0.6 or more, and preferably exceeds 0.7.
- Opal cut diamond 100 has four pairs of pavilion main facets, which are two pavilion main facets that are opposite to each other with respect to the central axis.
- a pair of two pavilion main facets opposite to each other with respect to the central axis is a pair of two pavilion main facets 142 extending in the direction of the second octant plane 18 (
- the two pavilion main facets and table facets that make up each pavilion main facet pair are
- the diamond 100 has four pairs of crown main facets consisting of two crown main facets opposite each other with respect to the central axis.
- a pair of crown main facets at opposite positions extend in the X-axis direction, and a pair of crown main facets A pair of crown main facets extending in the y-axis direction, and two pairs of crown main facets extending in the direction of the bisector.2 crown main facets constituting each crown main facet pair
- the table facets have a common vertical plane in their facets, and the angle (pavilion angle (p)) that each pavilion main facet has with the table facet is substantially the same.
- the diamond 100 with such a facet configuration has a strong shine.
- FIG. 5 shows an optical path using a cross section at the second octant plane 18 () of the opal-cut diamond 100 of Example 1.
- a table facet 122 and a pavilion main facet 142 are shown.
- the pavilion main facet 142 which is on the opposite side of the z-axis from the pavilion main facet, has a common vertical plane in these facets.
- Light incident on the facet with the crown is refracted or reflected by the facet.
- the incident, refracted, or reflected light of the beam travels along a vertical plane in its facet, because the table facet and the two pavilion main facets have a common vertical plane, so Some light passes through all facets and there is light that is reflected.
- Parts force light also enters into the diamond 100 is refracted by the tape Honoré facet toward the pavilion main facet 142.
- Light path It is reflected by the virion main facet 142 and is directed to the pavilion main facet 142 on the opposite side with respect to the z-axis, where it is reflected.
- the light exits the diamond 100 through the table facet 122.
- the light enters from the facet in the table facet or the crown is reflected twice in the diamond, and exits the diamond 100 from the facet in the table facet or the crown.
- the light that exits the diamond 100 from the facet on the table facet or crown, reflected twice from the facet or facet in the crown and entering the diamond, is the brightest.
- the intensity decreases as the number of reflections increases.
- the crown main facet (for example, the crown main facet on the + x axis side) 126a does not have the pavilion main facet facing each other across the girdle, but has two pavilion main facets and a part extending in the + x axis direction. They are just facing each other.
- the crown main facet 126a is opposed to two lower girdle facets 152d and 152e extending in the + x-axis direction with the girdle therebetween.
- the crown main facet 126b on the x-axis side is opposed to the two lower girdle facets 152g and 152h extending in the X-axis direction with the girdle therebetween.
- the four pavilion main facets (the pavilion main facet extending in the direction of the second octant plane 180 ') sandwiching the four lower girdle facets 152d, 152e, 152g, 152h have the same pavilion angle.
- lower girdle facets 152d and 152g and the two lower girdle facets 152e and 152h have a relationship in which the X and y components of the plane orientation vector have opposite signs. That is, the lower girdle facets 152d and 152g and the table facet 122 have a common vertical plane. Similarly, lower girdle facets 152e and 152h and table facet 122 have a common vertical plane.
- these facets do not have a common vertical plane, for example, if the pavilion main facet pair extending in the direction of the second octant plane 18 (does not have a common vertical plane in those facets, Light reaching one of the pavilion main facets will not be directed to the other pavilion main facet, so it will be reflected four or six times or more within the diamond and out of the table facet or crown main facet and onto the diamond. Or the diamonds are weakened because they pass through the pavilion main facet and lower girdle facet without being reflected.
- Pavilion Light emanating from one each facet to the outside of the diamond does not contribute to shine.
- FIG. 6 shows an optical path using a cross section of the opal-cut diamond 100 of Example 1 at 180 g of the second octant plane.
- External force through the facet on the y-axis side of the table facet 122 or on the crown and into the diamond 100 is also refracted by the table facet or facet on the crown and reflected by the pavilion main facet 144 ⁇ , facing the pavilion main facet 144 on the opposite side with respect to the z-axis. There they are reflected.
- the light exits the diamond through table facets 122 and facets in the crown. In this case as well, the light incident on the diamond is reflected twice in the diamond and goes out through the facets on the table facet and crown, so the light is bright.
- Table 1 shows the results of determining the reflection evaluation index of the opal-cut diamond (minor-major axis ratio (bZa): 0.8) of Example 1. As is evident from Table 1, the reflection evaluation indices of these diamonds were 308 and 321 respectively, and the brightness was stronger than that of the diamond of the comparative example described later. In addition, the reflection index was almost the same level as that of the diamond of Example 3 provided with the adjusting surface.
- FIGS. 7 to 10 An opal-cut diamond 200 according to Embodiment 2 of the present invention will be described with reference to FIGS. 7 to 10.
- 7 shows a top view of the diamond 200
- FIG. 8 shows a bottom view
- FIG. 9 shows a front view
- FIG. 10 shows a side view.
- the diamond 200 has a columnar girdle 210, a crown 120 above the girdle 210, and a pavilion 140 below the girdle 210.
- the crown 120 and the pavilion 140 of the diamond 200 have the same structure as the crown 120 and the pavilion 140 of the diamond 100 of the first embodiment, respectively.
- the horizontal section of the girdle 210 has a hexagonal shape.
- the upper girdle facet 136 intersects the outer surface of the girdle 210 in a straight line
- the lower girdle facet 152 intersects the outer surface of the girdle 210 in a straight line.
- the intersection line between 6 and the outer surface of the girdle is almost a straight line 212.
- the line connecting each end of the intersection line between the wedge facet and the outer surface of the girdle is the short axis as in Example 1.
- the ellipse is curved downward on the side and upward on the long axis side. For this reason, girdle-no-ito is small on the long axis side and large on the short axis side, and its middle value is exactly the same as that of diamond 100, so its reflection characteristics are the same as diamond 100.
- FIG. 11 is a top view of the hornlessly cut diamond according to the third embodiment of the present invention
- FIG. 12 is a bottom view
- FIG. 13 is a front view
- FIG. 14 is a side view.
- the opal-cut diamond 300 has a columnar girdle 310, a crown 120 at the top of the girdle 310, and a pavilion 340 at the bottom of the girdle 310.
- the crown 120 has an octagonal table facet 122 at its top!
- FIG. 11 is a view of the crane 120 viewed from the top, which is substantially the same as FIG. 1, and
- FIG. 12 is a view of the pavilion 340 viewed from the bottom.
- the same parts as those in the first embodiment are denoted by the same reference numerals.
- pavilion 340 has a lower vertex 362 at the lower end of the central axis, that is, a curette.
- the pavilion 340 has a substantially elliptical pyramid between the lower vertex 362 and the lower ridge of the girdle 310, and has eight pavilion main facets 342, 344 and 16 lower girdle facets on its outer periphery.
- Each of the pavilion main facets 342, 344 extends from the lower vertex 362 in the direction of the second octant plane 18 (, 180 °) between the lower vertex 362 and the lower ridge of the girdle 310,
- the main pavilion main facet 342 extending in the direction of the octant 18 of the pavilion and the second facet 344 extending in the direction of the second octant 180g are both quadrilateral or partial quadrilateral.
- the virion main facet 342 shares a side 386 (extending in the x-axis direction!
- the pavilion main facet 344 shares a side 386 (extending in the y-axis direction! /) With one end at the lower vertex 362 between the adjacent pavilion main facet 344 via the y-axis. .
- Each lower girdle facet is formed between the lower edge of the pavilion main facet 342, 344 and the lower edge of the girdle 310 on the outer peripheral surface of the pavilion elliptical cone.
- a triangle or an elliptical sector that has a vertex on the lower edge of the girdle, with the edge having one end on the lower edge of the girdle as the bottom edge.
- a circumscribed circle 347 circumscribing the girdle at the long axis end of the girdle 310 is drawn about the central axis (see FIG. 12).
- the second octant plane 18 (, 180 "each intersects the circumcircle 347 at points 353 'and 353g.
- the pavilion main facets 342 and 344 each pair the lower vertex 3 62 with the points 353' and 353g.
- Each of the pavilion main facets 34 2 and 344 shares a lower vertex, a side 386 with one end at 362, and the other end 387 of the side 386 with an adjacent pavilion main facet.
- each pavilion main facet has a diagonal line connecting the point on the circumference of the circumscribed circle 347 and the lower vertex 362 as an apex, and the diagonal forms an angle (pavilion angle) with the table facet.
- the minor axis of the girdle 310 is smaller than the radius of the circumscribed circle 347 on the minor axis side, as shown in FIG. Pavilion in the direction of face 180 "
- the tip of the girdle side of the on-main facet 344 is largely cut to form a partial quadrilateral.
- the tip of the girdle side of the pavilion main facet 342 in the direction of the second octant plane 18 is also slightly cut off. Is a partial quadrilateral
- each of the lower girdle facets includes the other end 387 of the side 386 shared by two adjacent pavilion main facets 342 and 344, and the second It has sides (line segments 387-353 ', 3S1 ⁇ ⁇ ") passing through the intersection points 353', 353g of the octant plane 180 ', 180g and the circumscribed circle 347, and the two adjacent second The plane 170 that bisects the angle between the octant plane 1 80 'and 180 ° (octant plane) 170
- the lower girdle facet has 356 as the top.
- the lower girdle facets eg, 352b, 352c
- the lower girdle facets have a triangular shape sandwiched between line segments 387-353 '(or 387-353g) and line segments 356-387.
- each of the pavilion main facets 342 and 344 connects the lower apex point 362 of the central axis and the points 353 ′ and 353 ′′ on the circumcircle 347.
- the pavilion main facet and the table facet 122 (pavilion angle (p)) are the same, and the structure of the crown 120 is the same as that of the embodiment.
- each of the eight crown main facets intersects perpendicularly with the octant plane, and the angle (crown angle ( c )) between the main facet and the table facet 122 is the same. Preferred,.
- a quadrilateral facet 398a is provided near the girdle of the lower girdle facet 352a on the short axis side.
- the line where the lower girdle facet 352a intersects with the adjustment surface 398a forms a ridge line 398.
- the distance from the zx plane to the ridge line 398 is preferably from 0.5a to 0.6a using the major axis (a).
- the ridge line 398 is the pavilion main facet 344 on both sides of the mouth wharf dolphin facet 352a, the lower girdle facet 352b between the virion main facet 344 and the octant plane 170, and adjacent to it!
- the adjustment surface provided on the pavilion main facet 344 near the short axis has a slightly larger angle than the pavilion angle with the force table facet, and the girdle light is substantially distributed over the entire circumference.
- These adjustment planes 398a, 394, 398b, Preferably, 398c is formed. As shown in the front view of FIG. 13 and the side view of FIG.
- each upper girdle facet 136 protrudes toward the girdle side at the ridge between the girdle 310 and the crown 120, and the girdle 310 and the pavilion
- the upper girdle facet and the upper center of each of the adjustment surfaces 398a, 398b, and 398c protrude toward the girdle side on the ridge line between 340 and the girdle, and the girderno and the eye appear to be smaller at those parts.
- the protrusion of the lower girdle facet at the center of the upper end and the center of the adjustment surface at the upper end of the girdle is because the girdle has an elliptical outer peripheral surface, and the ridge line between the upper girdle facets or their facets and the crown main facet A straight line 312 connecting the point where the ridge line intersects with the girdle,
- the girdle height is defined by the distance between the ridge line between the set and the pavilion main facet and the straight line 314 connecting the point where the ridge line between the adjustment surfaces intersects the girdle
- the girdle height is effectively defined as It can be constant over the entire girdle.
- it is desirable that the outer peripheral surface of the girdle is sandwiched between upper and lower ends by straight lines.
- the girdle height can be changed up to about 15% of the major diameter (a).
- Opal cut diamond 300 has four pairs of pavilion main facets consisting of two pavilion main facets that are opposite to each other with respect to the central axis.
- the pair of two pavilion main facets which are opposite to each other with respect to the central axis, is the pair of two pavilion main facets 3 42 extending in the direction of the second octant plane 18 ( A pair of two pavilion main facets 344, extending in the direction of 180g, two pairs each, two pavilion main facets and a table facet that make up each pavilion main facet pair.
- the diamond 300 also has four pairs of crown main facets consisting of two crown main facets that are oppositely positioned with respect to the central axis.
- a pair of crown main facets at opposite positions extend in the X-axis direction, and a pair of crown main facets.
- Facets and tablefas The sets have a common vertical plane in their facets.
- the angle (pavilion angle (p)) that each pavilion main facet has with the table facet is substantially the same. Diamond 300 having such a facet configuration has a strong shine.
- FIG. 15 shows an optical path using a cross section at the second octant plane 18 () of the opal-cut diamond 300 of Example 3.
- the optical path of this cross section is the same as that of FIG. Therefore, the description is omitted here.
- FIG. 16 shows an optical path of the opal-cut diamond 300 of Example 3 at 180 g of the eight-division plane.
- Light entering the diamond 300 through the facet in the table facet 122 or the crown is refracted by the facet of the table facet or crown, reflected by the pavilion main facet 344, and the pavilion main on the opposite side with respect to the z-axis. Facing to facet 344, where it is reflected.
- the light exits the diamond through table facets 122 or facets in the crown.
- the diamond 300 of the third embodiment is superior to the diamond 100 of the first embodiment.
- FIG. 17 is a top view
- FIG. 18 is a bottom view
- FIG. 19 is a front view
- FIG. 20 is a side view.
- the girdle 810 has a uniform height all around the girdle, as is apparent from FIGS.
- the table facet 822 is flattened in the y-axis direction while all the crown main facets 826 have the same crown angle (c).
- the main facet 842, 844, 846 ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ . ⁇ . Therefore, the pavilion angle of the two pavilion main facets 842 extending in the X-axis direction is small
- the pavilion angle of the two pavilion main facets 844 extending in the y-axis direction is large It has become.
- the pavilion angle of the two pavilion main facets 846 provided in the middle between the x-axis direction and the y-axis direction is the difference between the pavilion angle of the x-axis direction pavilion main facet 842 and the pavilion angle of the y-axis direction pavilion main facet 844.
- the X-axis direction pavilion main facet 842 is directed toward the central axis (z axis) passing through the lower vertex 862, that is, the perpendicular of the pavilion main facet 842 intersects the central axis. Further, the pavilion main facet 844 in the y-axis direction is directed toward a central axis (z axis) passing through the lower vertex 862, that is, a perpendicular line of the pavilion main facet 844 intersects the central axis. However, the vertical line of the papillion main facet 846 is toward the central axis (z axis).
- a pair of crown main facets 826, a pair of pavilion main facets 842, and a table facet 822, which are opposite to each other with respect to the central axis in the X-axis direction, have a common vertical plane ( (See Fig. 17 and Fig. 18 and Pokota! Shown by broken lines.) Hold 872!
- a pair of crown main facets 826, a pair of pavilion main facets 844, and a table facet 822 which are opposite to each other with respect to the center axis in the y-axis direction, have a common vertical surface 874 in the facets. ing.
- a pair of crown main facets 826 and table facets 822 which are opposite with respect to the central axis, have a common vertical surface 876 in their facets
- the force pavilion main facet 846 does not have its vertical surface 876 within those facets and is not vertical.
- the vertical surface 877 standing on the pavilion main facet 846 between the X and y axes and the vertical surface 878 standing on the pavilion main facet 846 between the X and y axes are Don't match!
- FIG. 21 is a graph showing the results of determining the reflection evaluation index of the opal-cut diamond 300 of Example 3 and the opal-cut diamond 800 of the comparative example described above.
- the abscissa represents the ratio of minor axis to major axis (bZa), and the ordinate represents the result of determining the reflection evaluation index by changing the minor axis ratio (bZa) for the diamonds of Example 3 and Comparative Example.
- the diamond 300 of the third embodiment has a pavilion angle of 38.5 ° and a crown angle of 27.92 °.
- Diamond 800 of the comparative example had a long-axis side pavilion angle of 38.5 °, and all the crown angles were 27.92 °.
- the minor-to-major axis ratio is set to less than 0.6, the facet of the opal-cut diamond becomes extremely elongated, and it becomes difficult to form the rim. Therefore, it is necessary to set the minor-to-major axis ratio to 0.6 or more. There is. Furthermore, as shown in FIG. 21, the round brilliant cut diamond (minor / major axis ratio (b / a): 1.0) having a reflection evaluation index of about 500 had a minor / major axis ratio (bZa) of 0.6. If it is less than 250, the brightness will be lower.
- the ratio of minor axis to major axis (bZa) When the ratio of minor axis to major axis (bZa) is 0.7 or more, the index for reflection evaluation becomes 250 or more, and the brightness increases. Therefore, the ratio of minor axis to major axis (bZa) of opal cut diamond must be 0.6 or more. Conversely, as the ratio of minor axis to major axis (bZa) approaches 1.0, it approaches the round brilliant cut, and the present invention does not need to be applied. Therefore, the ratio of minor axis to major axis (bZa) needs to be less than 0.95.
- Reflection evaluation index was obtained for AUNO-recut diamonds (minor-major axis ratio (b / a): 0.8) with samples A-U having different pavilion angles (p) and crown angles (c). Are shown in Table 2.
- FIG. 22 shows a graph in which the vertical axis is plotted with the pavilion angle (p) and the crown angle (c) with the horizontal axis of these samples.
- the maximum value of the reflection evaluation index was about 250 for the opal cut diamond of the comparative example (bZa): 0.8 shown in FIG. 17 to FIG. Therefore, the samples with a reflection evaluation index of 250 or more are those of Samples A-U in Table 2, where the A force is also P.
- the region of the pavilion angle (p) and the crown angle (c) of those samples is described in the present invention.
- the range is shown in bold in FIG. 22 and surrounded by a solid line.
- the pavilion angle (P) and the crown angle (c) are preferably defined as points (p, c) on a graph in which the horizontal axis is the pavilion angle (p) and the vertical axis is the crown angle (c).
- the table facet of the oval-cut diamond 100-300 and the facet of the crown and the facet of the crown with respect to its central axis Light 904 was irradiated at an angle of 20-45 °.
- the reflected light pattern reflected on the pavilion after being reflected in the diamond 100-300 can be imaged with the digital camera 910 and observed with the CRT 920, or it can be printed and observed.
- the intensity of the reflected light can be measured directly or by an image sensor on the print.
- the cylinder 903 is removed, and the center axis of the diamond 100-300 is 0-90. Irradiate light at an angle of ° and observe the reflected light pattern in the same way, and measure the intensity of the reflected light. A value obtained by averaging these reflected light intensities is determined as the reflected light intensity.
- the present invention can be applied to an opal-cut diamond in which a crown or a pavilion is rotated by 1Z16 and deformed, and strong reflected light can be obtained.
- the deformed opal cut diamond has a girdle having an elliptical cross section.
- the present invention is formed by intersecting two elliptical arcs (or an arc that is a kind of elliptical arc). It can be applied to diamonds called marquises that have a contoured contour in a gardle section parallel to the table facet.
- the present invention is called a pair shape having a girdle cross section parallel to the table facet and having a contour formed by intersecting three elliptical arcs (or an arc that is a kind of elliptical arc). It can also be applied to diamonds.
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP05721468A EP1741360A4 (en) | 2004-04-09 | 2005-03-25 | DIAMOND WITH OVAL CUT |
US10/598,805 US20070186586A1 (en) | 2004-04-09 | 2005-03-25 | Oval-cut diamond |
JP2006512020A JP4387406B2 (ja) | 2004-04-09 | 2005-03-25 | オーバルカットしたダイヤモンド |
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JP2004-115084 | 2004-04-09 | ||
JP2004115084 | 2004-04-09 |
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WO2005096867A1 true WO2005096867A1 (ja) | 2005-10-20 |
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PCT/JP2005/005491 WO2005096867A1 (ja) | 2004-04-09 | 2005-03-25 | オーバルカットしたダイヤモンド |
PCT/JP2005/005490 WO2005096866A1 (ja) | 2004-04-09 | 2005-03-25 | オーバルカットしたダイヤモンド |
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PCT/JP2005/005490 WO2005096866A1 (ja) | 2004-04-09 | 2005-03-25 | オーバルカットしたダイヤモンド |
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US (2) | US20070186586A1 (ja) |
EP (2) | EP1741359B1 (ja) |
JP (2) | JP4387405B2 (ja) |
KR (2) | KR101066802B1 (ja) |
CN (2) | CN100569137C (ja) |
AT (1) | ATE491361T1 (ja) |
DE (1) | DE602005025333D1 (ja) |
RU (2) | RU2362468C2 (ja) |
TW (2) | TWI342755B (ja) |
WO (2) | WO2005096867A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007168807A (ja) * | 2005-12-19 | 2007-07-05 | Dainippon Printing Co Ltd | プラスチックボトル容器 |
JP2009142455A (ja) * | 2007-12-14 | 2009-07-02 | Juho:Kk | ダイヤモンドおよびダイヤモンド形状の宝飾品およびそのカット方法 |
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JP4709087B2 (ja) * | 2006-07-14 | 2011-06-22 | 株式会社ほほえみブレインズ | 2段パビリオン装飾用ダイヤモンド |
JP4709088B2 (ja) * | 2006-07-14 | 2011-06-22 | 株式会社ほほえみブレインズ | 2段パビリオン装飾用ダイヤモンド |
US7878025B2 (en) * | 2007-05-04 | 2011-02-01 | SanDiamond USA, Corp. | Oval shaped diamond cut having hearts and arrows pattern |
JP5236209B2 (ja) * | 2007-05-10 | 2013-07-17 | 士朗 清原 | 歯牙製品及び歯牙製品の製造方法 |
AU2008346039B2 (en) * | 2008-01-09 | 2012-12-20 | Hohoemi Brains, Inc. | Ornamental diamond having two-stage pavilion |
US20110302959A1 (en) * | 2010-06-11 | 2011-12-15 | Adam Wcislo | Precious stone setting |
AT513466A1 (de) * | 2012-10-12 | 2014-04-15 | Swarovski D Kg | Schliff für Schmuckstein |
JP5788562B1 (ja) * | 2014-05-01 | 2015-09-30 | 株式会社タスコ | 宝石 |
US9226554B2 (en) | 2014-05-12 | 2016-01-05 | Yoshihiko Kodama | Circular cut diamond |
US9398791B1 (en) * | 2015-01-26 | 2016-07-26 | Ecna, Llc | Diamond cuts providing increased light amplification |
US10258118B2 (en) | 2015-06-16 | 2019-04-16 | Worldwide Diamond Trademarks Ltd. | Oval shaped diamond cut having hearts and arrows pattern |
US11234499B2 (en) * | 2016-09-29 | 2022-02-01 | Gem S.T.S. Co., Ltd. | Gemstone |
USD909235S1 (en) * | 2017-11-18 | 2021-02-02 | Jonathan WEINGARTEN | Faceted gemstone |
CN110754746B (zh) * | 2019-11-08 | 2021-10-01 | 周大生珠宝股份有限公司 | 一种一百刻面圆琢型钻石及其加工方法 |
CN118161014A (zh) * | 2020-01-15 | 2024-06-11 | 艾伯特加德有限公司 | 宝石及其切割方法 |
USD906160S1 (en) * | 2020-06-22 | 2020-12-29 | Olympian Diamonds, Inc. | Gemstone |
CN115829594B (zh) * | 2023-02-03 | 2023-06-06 | 国检中心深圳珠宝检验实验室有限公司 | 一种基于腰部轮廓特征的宝石识别方法、装置及存储介质 |
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- 2005-03-25 DE DE602005025333T patent/DE602005025333D1/de active Active
- 2005-03-25 AT AT05721467T patent/ATE491361T1/de not_active IP Right Cessation
- 2005-03-25 US US10/598,805 patent/US20070186586A1/en not_active Abandoned
- 2005-03-25 WO PCT/JP2005/005491 patent/WO2005096867A1/ja active Application Filing
- 2005-03-25 RU RU2006139647/12A patent/RU2362468C2/ru not_active IP Right Cessation
- 2005-03-25 EP EP05721467A patent/EP1741359B1/en not_active Not-in-force
- 2005-03-25 EP EP05721468A patent/EP1741360A4/en not_active Withdrawn
- 2005-03-25 CN CNB2005800122671A patent/CN100553516C/zh not_active Expired - Fee Related
- 2005-03-25 RU RU2006139638/12A patent/RU2363363C2/ru not_active IP Right Cessation
- 2005-03-25 WO PCT/JP2005/005490 patent/WO2005096866A1/ja active Application Filing
- 2005-03-25 JP JP2006512019A patent/JP4387405B2/ja not_active Expired - Fee Related
- 2005-03-25 US US10/598,801 patent/US20070186585A1/en not_active Abandoned
- 2005-03-25 JP JP2006512020A patent/JP4387406B2/ja not_active Expired - Fee Related
- 2005-03-29 TW TW094109821A patent/TWI342755B/zh not_active IP Right Cessation
- 2005-03-29 TW TW094109819A patent/TWI342754B/zh not_active IP Right Cessation
- 2005-04-07 KR KR1020050028967A patent/KR101066802B1/ko not_active IP Right Cessation
- 2005-04-07 KR KR1020050028970A patent/KR101066803B1/ko not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
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CN100553516C (zh) | 2009-10-28 |
TWI342754B (en) | 2011-06-01 |
CN1946310A (zh) | 2007-04-11 |
RU2362468C2 (ru) | 2009-07-27 |
DE602005025333D1 (de) | 2011-01-27 |
EP1741360A4 (en) | 2008-06-18 |
TW200600030A (en) | 2006-01-01 |
RU2006139638A (ru) | 2008-05-20 |
JP4387406B2 (ja) | 2009-12-16 |
EP1741359A1 (en) | 2007-01-10 |
TWI342755B (en) | 2011-06-01 |
JP4387405B2 (ja) | 2009-12-16 |
KR20060045570A (ko) | 2006-05-17 |
ATE491361T1 (de) | 2011-01-15 |
JPWO2005096866A1 (ja) | 2008-02-21 |
CN1946311A (zh) | 2007-04-11 |
EP1741359B1 (en) | 2010-12-15 |
US20070186586A1 (en) | 2007-08-16 |
RU2006139647A (ru) | 2008-05-20 |
KR101066802B1 (ko) | 2011-09-22 |
WO2005096866A1 (ja) | 2005-10-20 |
KR20060045569A (ko) | 2006-05-17 |
JPWO2005096867A1 (ja) | 2008-02-21 |
KR101066803B1 (ko) | 2011-09-22 |
EP1741359A4 (en) | 2008-06-18 |
EP1741360A1 (en) | 2007-01-10 |
CN100569137C (zh) | 2009-12-16 |
RU2363363C2 (ru) | 2009-08-10 |
US20070186585A1 (en) | 2007-08-16 |
TW200536495A (en) | 2005-11-16 |
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