CN108474937B - Gemstone observation instrument and observation method - Google Patents
Gemstone observation instrument and observation method Download PDFInfo
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- CN108474937B CN108474937B CN201680076799.XA CN201680076799A CN108474937B CN 108474937 B CN108474937 B CN 108474937B CN 201680076799 A CN201680076799 A CN 201680076799A CN 108474937 B CN108474937 B CN 108474937B
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- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/04—Eyepieces; Magnifying glasses affording a wide-angle view, e.g. through a spy-hole
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Abstract
The present invention provides a gemstone observation instrument capable of observing the brilliance and flaws of a gemstone and patterns appearing in a reflection image of the gemstone. Provided is an observation instrument for a gemstone having a cut surface and having transparency, the observation instrument for the gemstone comprising: a main body part (1) having a magnifying lens (12) and a cylinder body (2) connected to the main body part (1), the cylinder body (2) having: the light shielding device comprises a transparent cylinder (21) for transmitting natural light and a light shielding member (22) for shielding the natural light, wherein the light shielding member (22) can freely move in the axial direction of the transparent cylinder (21).
Description
Technical Field
The present invention relates to an observation instrument and an observation method for a cut gemstone such as a diamond having a cut surface and having transparency.
Background
Generally, the value of cut gemstones such as cut diamonds having a cut surface and having transparency is ranked (hereinafter referred to as grading) by evaluating four factors of color (color), clarity (clarity), carat (weight), and cut (polishing). Among them, because the cut determines the direction of the surface reflection and the internal reflection of the light incident on the gemstone, it is an important factor in determining the brilliance of the gemstone, greatly affecting the final aesthetics and value of the gemstone.
However, the evaluation of the cut is the most complicated evaluation among the above four elements, and is technically very difficult. Conventionally, a magnifying glass is used to visually distinguish the state of a cut applied to a gemstone. However, the evaluation of the cut by using only such a magnifying glass, although possible for experts with advanced skills, is not possible for the average consumer. In particular, in a round brilliant cut (round brilliant cut) which is classified with strict and detailed standards, it is difficult for even an expert having high skills to perform reliable evaluation.
Therefore, various gemstone viewing instruments have been proposed that anyone can easily judge the proportion and cut symmetry of a gemstone.
For example, patent document 1 describes a gem observation instrument, which is characterized in that a hole (101) is provided in the center of a substantially hemispherical main body (100), a magnifying lens (110) is provided in the substantially hemispherical main body (100), and a cylindrical body (200) is continuously provided in the opening direction of the substantially hemispherical main body (100) (see fig. 7).
By using the gemstone observation instrument configured as described above, a reflected image of light incident on the gemstone can be easily obtained. Further, the shape, regularity, and symmetry of the pattern of the reflection image obtained by using the above-described observation device were observed, and the quality of the cut precision, the quality of the gem, and the like were evaluated.
In particular, it is known that a reflection image of a round brilliant cut gemstone is called "heart and hill" (ハート · アンド · キューピッド, heart and cut) "and a pattern in the shape of an" arrow "is observed when viewed from the crown side of the gemstone (see fig. 3).
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2002-196262
Disclosure of Invention
Problems to be solved by the invention
In addition, in the case of evaluating the value of a gemstone having a cut surface and transparency (hereinafter referred to as a gemstone), it is also necessary to confirm the brightness (luminance) and flaws of the gemstone.
However, the magnifying visual system described in patent document 1 can observe the shape, regularity, and symmetry of the pattern of the reflected image, but cannot observe the brightness and flaws of the gemstone.
In view of the above circumstances, an object of the present invention is to provide a gemstone viewing apparatus capable of viewing the brilliance and flaws of a gemstone as well as the patterns appearing in a reflected image of the gemstone.
Means for solving the problems
In order to solve the above problems, a gemstone observation instrument according to the present invention is an observation instrument for a gemstone having a cut surface and having transparency, the gemstone observation instrument including: a body portion having a magnifying lens and a barrel connected to the body portion, the barrel having: the light shielding component can move freely in the axial direction of the transparent cylinder.
The natural light mentioned here is not limited to light from nature such as sunlight and moonlight, but also includes an artificial light source in a room.
In this way, since the cylinder has the transparent cylinder and the light shielding member, the light shielding member can freely move in the axial direction of the transparent cylinder, and thus the incident angle and the reflection angle of the natural light in the transparent cylinder can be adjusted. As a result, the brilliance and flaws of the gemstone, as well as the pattern appearing in the reflected image of the gemstone, can be observed. The imperfections referred to herein include imperfections in the surface of the stone and imperfections in the interior of the stone.
According to a preferred aspect of the present invention, the light blocking member is provided on an outer periphery of the transparent cylinder.
In this way, since the light shielding member is provided on the outer periphery of the transparent cylinder, the position of the light shielding member can be easily moved while observing the reflected image.
According to a preferred aspect of the present invention, the light blocking member is formed in a cylindrical shape.
In this way, since the light blocking member is formed in a cylindrical shape, the light blocking member that slides on the outer periphery of the transparent cylinder can be easily formed.
According to a preferred aspect of the present invention, the inside of the main body is colored in color.
In this way, since the inner surface of the main body on the cylinder side is colored in color, the observation pattern of the reflection image to be observed can be easily evaluated.
Further, a gemstone observation method according to the present invention is a gemstone observation method using the gemstone observation instrument according to the present invention, the gemstone observation method including: and a step of placing the gemstone at a focal point of the magnifying lens and observing the gemstone.
In this way, since the gemstone is observed with the gemstone placed at the focal point of the magnifying lens of the gemstone observation instrument of the present invention, it is possible to observe the brilliance and flaws of the gemstone and the pattern appearing in the reflected image of the gemstone.
Further, the gemstone observation method of the present invention is characterized by further comprising a step of observing while moving the light shielding member in the axial direction of the transparent cylinder.
In this way, since observation is performed while the light shielding member is moved in the axial direction of the transparent cylinder, the light shielding member can be easily positioned to easily confirm the brilliance and flaws of the gemstone.
Effects of the invention
The present invention can provide a gemstone viewing apparatus capable of viewing the brilliance and flaws of a jewelry and the patterns appearing in a reflected image of a gemstone.
Drawings
Fig. 1 is an exploded perspective view of a gemstone viewing instrument according to an embodiment of the present invention.
Fig. 2 is a longitudinal sectional view of the gemstone viewing apparatus according to an embodiment of the invention, taken along line X-X of fig. 1.
Fig. 3 is an observation image of an ideal "round brilliant cut" diamond, in which fig. 3(a) shows an observation image taken with a conventional gemstone observation instrument, and fig. 3(b) shows an observation image taken with a gemstone observation instrument according to an embodiment of the present invention.
Fig. 4 is an observation image of a diamond having a defective "round brilliant cut", in which fig. 4(a) and 4(b) show observation images taken using a conventional gemstone observation instrument, and fig. 4(c) and 4(d) show observation images taken using a gemstone observation instrument according to an embodiment of the present invention.
Fig. 5 is a perspective view showing a cylinder of a gemstone observation instrument according to an embodiment of the present invention, in which fig. 5(a) shows a state in which a light shielding member is slid upward from the other end side of a transparent cylinder, and fig. 5(b) shows a state in which the light shielding member is slid to the other end side of the transparent cylinder.
Fig. 6 is an observation image of an ideal diamond of the "round patterned bright cut", in which fig. 6(a) shows an observation image photographed by using a conventional gem observation instrument, fig. 6(b) shows an observation image photographed by using the gem observation instrument according to the embodiment of the present invention in the state of fig. 5(a), and fig. 6(c) shows an observation image photographed by using the gem observation instrument according to the embodiment of the present invention in the state of fig. 5 (b).
FIG. 7 is a vertical sectional view showing a conventional gem observation instrument.
Detailed Description
Hereinafter, a preferred embodiment of the present invention shown in the drawings will be described in detail. The technical scope of the present invention is not limited to the embodiments shown in the drawings, and can be appropriately modified within the scope described in the claims.
A gem observation instrument according to an embodiment of the present invention includes a main body 1 having a magnifying lens 12 and a cylindrical body 2 connected to the main body 1, wherein the main body 1 is connected to one end side of the cylindrical body 2, and an observation object D is disposed on the other end side of the cylindrical body 2 (see fig. 1 and 2).
As the observation target D, a cut diamond is exemplified, but not limited thereto, and the gemstone observation instrument of the present invention may be used as long as it is a gemstone having a cut surface and having transparency.
The bare stone case R shown in fig. 2 is a case for accommodating the observation target D. In general, when a gemstone is observed, observation is performed from above an observation target D set on the bare-metal case R using a gemstone observation instrument. Further, it is desirable that the bare stone case R is configured not to pass natural light from the lower part.
The main body 1 has a housing main body 11 and a magnifying lens 12 provided in the housing main body 11.
The casing body 11 is formed in a substantially hemispherical shape, and an observation hole 11a is provided in a central portion of the substantially hemispherical shape. Further, although not shown, it is desirable that the inside of the case main body 11 is colored in color. The housing body 11 is desirably formed of a translucent member, and is configured such that light enters the housing body 11 from the outside to the inside. The shape of the case body 11 is exemplified by a substantially hemispherical shape, but a polygonal columnar shape such as a columnar shape or a rectangular columnar shape may be employed.
The observation hole 11a may be formed in any size as long as the size is determined as necessary. The user of the observation device can confirm the reflected image of the observation target D disposed on the other end side of the cylindrical body 2 by observing the observation hole 11 a.
The magnifying lens 12 may be formed in a size corresponding to the outer shape of the housing body 11 so as to be disposed inside the housing body 11 as long as the observation object D can be viewed in a magnified manner (see fig. 2). The installation location of the magnifying lens 12 is not limited to the inside of the housing main body 11, and may be provided between the housing main body 11 and the cylindrical body 2, or may be provided on one end side of the cylindrical body 2.
The cylinder 2 has a transparent cylinder 21 formed of a material that transmits natural light and a light blocking member 22 formed of a material that blocks natural light.
The transparent cylindrical body 21 has one end side opening 21a connected to the main body 1 and the other end side opening 21b in which the observation object D is arranged. The diameter of the transparent cylinder 21 is formed to a size corresponding to the outer shape of the housing main body 11, and the length of the transparent cylinder 21 has a length corresponding to the focal length of the magnifying lens 12.
The transparent cylindrical body 21 may be connected to the main body 1 by an adhesive means such as an adhesive, or may be detachably connected by a conventional means such as fitting or screwing.
The light blocking member 22 is formed in a cylindrical shape having an inner diameter corresponding to the outer diameter of the transparent cylinder 21. The length of the light shielding member 22 is set shorter than the length of the transparent cylinder 21, preferably in the range of 1/4 to 2/3 of the length of the transparent cylinder 21, more preferably in the range of 1/2 to 1/3 of the length of the transparent cylinder 21. The light blocking member 22 is desirably made of a material that blocks natural light, but may be made of a material having low light transmittance. The light shielding member 22 is not necessarily formed in a cylindrical shape, and may be configured to shield light by attaching an elastic material such as rubber or an adhesive material such as a tape to the outer periphery of the transparent cylindrical body 21.
The light blocking member 22 is configured to be movable up and down on the outer periphery of the transparent cylindrical body 21. That is, when the light blocking member 22 is formed in a cylindrical shape, the light blocking member 22 is formed in a size corresponding to the outer diameter of the transparent cylinder 21 and is configured to be slidable in the axial direction of the transparent cylinder 21 (see fig. 5 (a)). Although not shown, the light blocking member 22 may be rotated in the circumferential direction of the transparent cylinder 21 by providing a thread groove on the outer circumference of the transparent cylinder 21 and the inner circumference of the light blocking member 22 and screwing them together, thereby allowing the movement adjustment in the axial direction of the transparent cylinder 21.
Next, an observation image when the gemstone observation instrument of the present invention is used will be described in detail with reference to fig. 3. First, an observation image (fig. 3 a) obtained by using a conventionally used gem observation instrument (see fig. 7) will be described, and then an observation image (fig. 3 b) obtained by using the gem observation instrument of the present invention will be described in detail.
Fig. 3(a) is an observation image obtained when a diamond subjected to a substantially ideal "round brilliant cut" is observed from the crown side using a conventional gem observation instrument (see fig. 7). The observed pattern shown in fig. 3 a of the observed image is composed of a plurality of kinds of blue (gray in the drawing photograph) having different hues and luminances from white, and a white "arrow" pattern radially extending in eight directions from the center of the diamond clearly appears. In the observation pattern observed in this way, the white (arrow) region indicates that light incident on the observation target D from the crown side of the gemstone is reflected in the observation direction, and the blue region indicates that no reflection is performed. In addition, the blue region is due to the use of the blue cylinder 200.
On the other hand, fig. 3(b) is an observation image when the diamond observed in fig. 3(a) is observed from the crown side using the gem observation instrument of the present invention. At this time, as shown in fig. 2, the light blocking member 22 is disposed at a position slightly above the other end side of the transparent cylindrical body 21, and observation is performed in a state where natural light is incident from the wall surface on the one end side and the wall surface on the other end side of the transparent cylindrical body 21.
In the observation pattern shown in the observation image, the "arrow" portion corresponding to the white area in fig. 3 a is shown in pink (light gray in the photograph of the drawing), and the other areas are composed of white, gray, and black indicating the brightness (luminance) including the seven colors of brightness unique to the transparent jewel called fire. In the observed pattern, a pink (arrow) region indicates that light incident on the observation target D from the crown side is reflected in the observation direction, and the other part indicates the brightness (luminance) unique to the diamond observed when the diamond is observed under natural light. That is, the appearance of pink in the observation pattern is due to the inner side surface of the case main body 11 being colored pink. In addition, the brightness (luminance) peculiar to the diamond appears in the reflected image from the natural light incident from the wall surfaces of the one end side and the other end side of the transparent cylinder 21 without being blocked by the light blocking member 22.
As described above, when the gem observation instrument of the present invention is used, the brightness (luminance) unique to the diamond appears in the observation image. Further, the portion of the gemstone that reflects toward the viewing direction of the viewing image is colored.
Next, the flaws of the gemstone observed when the gemstone observation instrument of the present invention is used will be described in detail with reference to fig. 4. First, an observation image (fig. 4(a) and 4(b)) obtained by observing a diamond having a defective "round brilliant cut" using a conventionally used gem observation instrument (see fig. 7) will be described, and then an observation image (fig. 4(c) and 4(d)) obtained using the gem observation instrument of the present invention will be described in detail.
Fig. 4(a) and 4(b) are observation images obtained when the diamond of the "round brilliant type cutter" having a flaw is observed from the crown side using a conventional gem observation instrument (see fig. 7). Fig. 4(a) is an overall image of the reflection image, and fig. 4(b) is an enlarged view of a portion having a flaw. However, it is very difficult to distinguish whether the gem has flaws or not even if fig. 4(a) and 4(b) are confirmed.
On the other hand, fig. 4(c) and 4(d) are observation images obtained when the diamond used in fig. 4(a) and 4(b) is observed from the same direction using the gemstone observation instrument of the present invention. Fig. 4(c) is an overall image of the reflection image, and fig. 4(d) is an enlarged view of a portion having a flaw. As shown in fig. 4(d), it can be seen that flaws clearly occur.
Next, a method of using the present invention will be described in detail with reference to fig. 5 and 6. Fig. 5 is a view showing a state in which the light shielding member 22 slides in the axial direction of the transparent cylinder 21. Fig. 5(a) shows a state in which natural light is incident from the wall surface on the other end side of the transparent cylinder 21 by sliding the light blocking member 22 slightly upward from the other end of the transparent cylinder 21. On the other hand, fig. 5(b) shows a state in which natural light is not incident from the wall surface on the other end side of the transparent cylinder 21 by sliding the light shielding member 22 to the other end side of the transparent cylinder 21.
Fig. 6 is an observation image obtained when the diamond subjected to the "Round patterned brilliant Cut (Round patterned brilliant Cut)" is observed from the coronal side. First, an observation image (fig. 6(a)) obtained by using a conventionally used gem observation instrument will be described, and then, an observation image (fig. 6(b) and fig. 6(c)) obtained by using the gem observation instrument of the present invention will be described in detail.
Fig. 6(a) shows an observation image when a conventional gem observation instrument (see fig. 7) is used. The pattern of the reflection image shown in the observation image is composed of a plurality of kinds of blue (gray in the drawing photograph) having different hues and values from white, and appears clearly as white "petals" extending radially in five directions from the center of the diamond. In this observation pattern, a white region indicates that light incident on the observation object D from the crown side is reflected in the observation direction, and a blue region indicates that no reflection is performed.
Fig. 6(b) is an observation image of the gem observation instrument (see fig. 5(a)) of the present embodiment when the diamond observed in fig. 6(a) is viewed from the crown side in a state where natural light is incident from the wall surfaces on one end side and the other end side of the transparent cylinder 21. In the pattern of the reflection image shown in the observation image of fig. 6(b), "petal-shaped" regions corresponding to the white regions of fig. 6(a) are shown in pink (gray in the drawing photograph), and the other portions are composed of white, gray, and black indicating the brightness (luminance) of the diamond. In this observation pattern, a pink region indicates that light incident on the observation target D from the crown side is reflected in the observation direction, and the other region indicates the luminance (brightness) unique to the diamond observed when the diamond is observed under natural light.
On the other hand, fig. 6(c) is an observation image seen when the diamond observed in fig. 6(a) is observed from the crown side using the gem observation instrument of the present embodiment (see fig. 5(b)) in a state where natural light is not incident from the wall surface on the other end side of the transparent cylinder 21. In the pattern of the reflection image shown in the observation image of fig. 6(c), "petal-shaped" regions corresponding to the white portions of fig. 6(a) are shown in pink (gray in the drawing photograph), which corresponds to the observation image of fig. 6 (b). However, the other regions are displayed in a light color, and the brightness (luminance) peculiar to the diamond is reduced, and the "petal-like" is displayed more clearly.
According to the present invention, since the light blocking member 22 is provided on the outer periphery of the transparent cylinder 21 and natural light is made incident from the wall surfaces of the transparent cylinder 21 on one end side and the other end side, the pattern of the reflected image and the brightness and flaws of the gemstone to be observed D can be observed at the same time. That is, since the region where the natural light is incident is formed on one end side and the other end side of the transparent cylinder 21 and the region where the natural light is blocked is formed in the central portion of the transparent cylinder 21, the pattern specific to the reflection image of the gem and the brightness (luminance) specific to the diamond can be observed at the same time. Further, by observing the brightness (brilliance) unique to the diamond, it is possible to confirm whether or not a flaw is present in the gem.
Further, according to the present invention, since the light shielding member 22 is provided on the outer periphery of the transparent cylinder 21 in a movable manner in the axial direction, the amount of natural light incident on one end side and the other end side of the transparent cylinder 21 can be adjusted. That is, by sliding the light blocking member 22, the amount of natural light entering from one end side and the other end side of the transparent cylinder 21 can be adjusted in accordance with the amount of light of the surrounding environment (room brightness, etc.), and thus the luminance of the object D and the amount of light of the flaws can be easily adjusted.
Further, according to the present invention, by sliding the light blocking member 22 to the other end side of the transparent cylinder 21, natural light is prevented from entering the other end side wall surface of the transparent cylinder 21, and thus the pattern portion can be clearly observed as in the case of the conventional gem observation instrument. That is, when the pattern of the reflected image is to be clearly evaluated, the other end side of the transparent cylinder 21 is covered with the light blocking member 22, whereby the pattern of the reflected image can be clearly observed.
Further, according to the present invention, since the inner side surface of the housing main body 11 is colored in color, the pattern of the reflected image to be observed can be easily observed. The "arrow" appearing in the "round brilliant cut" of the diamond and the "petal-like" appearing in the "round patterned brilliant cut" indicate the reflection of the light incident from the main body 1 side (observation direction) in the observation direction. Therefore, by coloring the inner surface of the housing main body 11 in the same direction as the observation direction, the pattern portion of the reflection image can be colored. As a result, the shape of the pattern appearing in the reflected image can be easily, clearly, and beautifully determined or observed.
Description of reference numerals:
1 main body part
11 casing body
11a hole for observation
12 magnifying lens
2 barrel
21 transparent cylinder
22 light-shielding member
D observing an object
R bare jewel box
Claims (5)
1. A gemstone viewing instrument, said gemstone having a cut surface and having a degree of transparency, said gemstone viewing instrument comprising:
a main body portion having a magnifying lens; and
a barrel connected to the main body portion,
the barrel has:
a transparent cylinder transmitting natural light; and
a light shielding component for shielding natural light,
wherein the main body part is connected with one end side of the transparent cylinder body,
the transparent cylinder is configured such that the gem stone can be arranged on the other end side of the transparent cylinder,
the light shielding member is provided on the outer periphery of the transparent cylinder and is movable in the axial direction of the transparent cylinder so that the other end side of the transparent cylinder can be exposed.
2. The gemstone viewing apparatus according to claim 1, wherein the light blocking member is formed in a cylindrical shape.
3. The gemstone viewing apparatus of any of claims 1-2, wherein the interior of the body portion is colored.
4. A gemstone viewing method using the gemstone viewing apparatus of any one of claims 1 to 3, comprising:
and a step of placing the gemstone at a focal point of the magnifying lens and observing the gemstone.
5. The gemstone viewing method according to claim 4, further comprising a step of performing viewing while moving the light shielding member in an axial direction of the transparent cylinder.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2016/050174 WO2017119072A1 (en) | 2016-01-05 | 2016-01-05 | Observation equipment and observation method for jewels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108474937A CN108474937A (en) | 2018-08-31 |
| CN108474937B true CN108474937B (en) | 2020-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680076799.XA Active CN108474937B (en) | 2016-01-05 | 2016-01-05 | Gemstone observation instrument and observation method |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6637072B2 (en) |
| CN (1) | CN108474937B (en) |
| WO (1) | WO2017119072A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK139645B (en) * | 1976-04-06 | 1979-03-19 | Axel Leopold Heiberg | Holder for the study of cut diamonds and other precious stones. |
| JPH06103268B2 (en) * | 1989-02-17 | 1994-12-14 | 金作 山下 | Instrument for observing brilliance of jewels such as diamond and method for photographing jewels using the instrument |
| JPH06174648A (en) * | 1992-12-08 | 1994-06-24 | Kinsaku Yamashita | Implement for observing jewel or accessory and method for picking up image of diamond or accessory with diamond, using the implement |
| JP3088217U (en) * | 2002-02-27 | 2002-09-06 | 石川光学工業株式会社 | Jewel cut confirmation device |
| JP3103962U (en) * | 2004-03-11 | 2004-08-26 | 石川光学工業株式会社 | Jewelry cut confirmation loupe |
| JP3125251U (en) * | 2006-06-30 | 2006-09-14 | 石川光学工業株式会社 | Jewel cut confirmation instrument |
| JP3138351U (en) * | 2007-10-17 | 2007-12-27 | 石川光学工業株式会社 | Jewelry storage apparel |
-
2016
- 2016-01-05 CN CN201680076799.XA patent/CN108474937B/en active Active
- 2016-01-05 JP JP2017559969A patent/JP6637072B2/en active Active
- 2016-01-05 WO PCT/JP2016/050174 patent/WO2017119072A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2017119072A1 (en) | 2018-10-25 |
| JP6637072B2 (en) | 2020-01-29 |
| CN108474937A (en) | 2018-08-31 |
| WO2017119072A1 (en) | 2017-07-13 |
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