JPH06174648A - Implement for observing jewel or accessory and method for picking up image of diamond or accessory with diamond, using the implement - Google Patents

Abstract

PURPOSE:To enable simultaneous observation or photographing of a precious metal part whereon a diamond is mounted or other jewelry set around the diamond, with the characteristic pattern of the diamond due to a reflected light therefrom. CONSTITUTION:An implement which is a tubular body 1 being made up of a lower tubular part 2 and an upper tubular part 3 provided continuously to the upper part of the lower tubular part, and having the upper and lower ends opened 4 and 5, of which the inner surface of the lower tubular part 2 has a chromatic color, of which the upper tubular part 3 is made of a translucent material or a material transmitting light moderately and of which the lower tubular part 3 is so constructed that a line connecting the center of the lower end part thereof and the upper edge part has an angle of 10 deg. to 25 deg. to the axial line of the lower tubular part 2, is used. At the central part of the lower end part of the lower tubular part 2 making up this implement, a diamond B is positioned in a state wherein the lower edge part of the crown of the diamond B coincides substantially with the height of the lower edge part of the lower tubular part 2, and the diamond or an accessory with the diamond is observed or photographed from above the upper tubular part 3 through the inside of the tubular body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool for observing jewelry or jewelry, especially diamond or jewelry with diamonds, and a method for photographing diamonds or jewelry with diamonds by using the tool.

[0002]

2. Description of the Related Art One of the reasons why diamond is preferred as a jewel is due to its unique brilliance. The brilliance peculiar to this diamond is due to the fact that the light incident on the diamond is internally reflected by the cut surface, the light is dispersed, and shines in seven colors and returns to the surface. Therefore, the degree of brilliance of diamond is greatly influenced by the goodness and badness of its cut and proportion. An ideal brilliant-cut diamond that seeks brilliance,
It has a proportion of flesh, and each cut surface faces the right direction. For this reason, most of the light incident on the diamond is regularly internally reflected on the cut surface and collected on the crown side, and thus exhibits the greatest brilliance.

On the other hand, a rough cut diamond for which only the carat (stone size) is obtained has a proportion that leaves extra carcass, and the cut surfaces face in different directions. Therefore, the incident light cannot be regularly reflected internally, the amount of light collected on the crown side is small, and the brightness is small. Further, in the case of a particularly bad cut, there is also a case where incident light is directly emitted to the pavilion (back surface) side.

Generally, general consumers observe diamonds with naked eyes in stores, but due to the influence of lighting or the like, they appear to have almost the same brilliance regardless of whether the cut is good or bad. Very difficult for those who do not. Therefore, as a general tendency of the related art, it is the actual situation that the manufacture and sale are carried out mainly on the carat which can be directly reflected in the price, rather than the quality of cut and proportion which are difficult to judge as described above.

As a simple instrument for observing the brilliance of diamond, Japanese Utility Model Laid-Open No. 60-109041 has been proposed. This instrument puts a diamond between a magnifying glass and a light source, and shines the light from the light source on a red disc with a hole in the center attached to the objective lens side of the magnifying glass so that the light reflects on the diamond. The diamond with a lot of red light is said to have good brilliance.

[0006] However, since the above equipment requires a light source, it can be used only in a place where a power source is provided, and it is inconvenient to carry it. In addition, the diamond pattern observed with this device is extremely monotonous, consisting only of white and one type of red (the bright part is red and the non-shiny part is white), which is necessary for judging the brightness. There was no pattern of light and shade based on the intensity of light, and there was no stereoscopic effect. For this reason, the brilliance of diamond cannot be determined sufficiently clearly.

The photographs used for the diamond certificate and the like are obtained by illuminating the diamond from below and photographing it with a camera from above. The pattern projected by this is the most visible to human eyes. The bright and least bright parts are black, and the other parts are whitish. In such a photograph, the portion that should appear to be the brightest appears in black, as if it were a negative film in black and white photography. Since the originally brightest part and the least bright part are shown in the same black color, it is impossible to determine which part is truly bright. There should be a brighter part and a part with less shine, that is, the intensity of brilliance, in the part that appears in white, but in the above picture, there is almost no change in shade due to such a difference in brilliance, and white The difference in brightness between the parts cannot be determined at all. Therefore, there is no stereoscopic effect of the pattern itself. Therefore, even if it was an expert, it was very difficult for an amateur to understand.

As a device for solving such a problem, the inventor of the present invention has previously proposed, as Japanese Patent Laid-Open No. 2-290542, a device by which even an amateur can easily judge the quality of brilliance of jewels such as diamond. This device is made of a material that does not transmit light, the inner bottom part of which consists of a bottomed bottom tubular part that constitutes the placement part of a jewel, and an upper tubular part made of a semi-transparent material that is provided above it. The tube is configured such that a line connecting the center of the inner bottom and the upper edge has an angle of 10 to 25 ° with respect to the axis of the lower tube, and does not reflect light on the surface of the inner bottom on which the jewel is placed. It is a device with a black color, and with this device it is possible to observe a very characteristic pattern according to the reflected light from the diamond, and even an amateur can easily judge the quality of the brightness of the diamond etc. . Moreover, the photograph of the diamond photographed by this device captures the brilliance based on the quality of the diamond cut with extremely high accuracy, and is therefore extremely suitable as a photograph for a gem certificate.

[0009]

When observing a diamond attached to an ornament such as a ring or a necklace with the above instrument, the characteristic pattern of the diamond itself can be observed as described above. However, in general, those who purchase jewelry such as diamond rings and necklaces are not only the quality of diamonds, but also the design of diamonds with precious metals (gold, platinum, etc.) and other stones, color matching, and diamonds. It is usual to select a product based on the design, color, etc. of the ornamental product including. In this regard, in the above-mentioned conventional equipment, since the surface of the inner bottom portion on which the diamond is placed has a black color that does not reflect light, it is scattered around the precious metal portion where the diamond is attached or around the diamond. Regarding so-called colored stones (for example, sapphire and ruby) that have been used, there is a drawback that even the very peripheral part of the diamond cannot be observed (or photographed).

[0010]

In view of such drawbacks of conventional equipment, the present inventors can observe not only the characteristic pattern peculiar to diamond as in the conventional equipment but also the diamond is attached. We examined the equipment that can observe other precious stones and other jewelry scattered around diamonds at the same time. As a result, by using an instrument with a specific structure with an open lower end, and arranging a jewelry item with a diamond at the lower end of the instrument in a predetermined state, it is possible to observe the characteristic pattern of diamond as in the conventional device. Without observing the precious metal part to which the diamond is attached and other jewels scattered around the diamond, and unlike the diamond pattern reflecting the color of the inner surface of the lower cylinder part, the precious metal part etc. It was found that can be observed very clearly with its natural color.

The present invention has been made on the basis of such knowledge, and its constitution is as follows. (1) A tubular body having an open upper end and a lower end, which is composed of a lower tubular portion and an upper tubular portion continuous with the upper portion thereof, is provided, and the upper tubular portion has a configuration for appropriately transmitting light. The tubular portion has a structure that does not substantially allow light to pass or is less likely to pass light than the upper tubular portion, and the line connecting the center of the lower end and the upper edge of the lower tubular portion is the axis of the lower tubular portion. An observation tool for jewelry or ornaments configured to have an angle of 10 ° to 25 ° with respect to. (2) The observing instrument according to the above (1), which has a magnifying lens at the upper end of the upper tubular portion, for jewels or ornaments. (3) In the observation tool according to (1) or (2) above,
An observation tool for jewelry or jewelry whose upper cylinder is made of translucent material or thin paper.

(4) A method of photographing a diamond or a jewelry item with a diamond by using the instrument of the above (1), wherein a lower edge portion of a diamond crown is provided at a central portion of a lower end portion of a lower tubular portion constituting the instrument. The diamond or the diamond, characterized in that the diamond is positioned in such a manner that the height of the lower cylinder substantially matches the height of the lower edge of the lower cylinder, and the diamond or jewelry with diamond is photographed through the inside of the cylinder from above the upper cylinder. How to shoot accessories.

[0013]

The photograph of FIG. 12 is a photograph of a ring with a diamond, which has a shape as shown in FIGS. 1 and 2 and in which the inner surface of the lower tube portion is constructed in red. At the center of the lower end of the lower tubular portion 2 constituting the device, the lower edge portion x of the diamond crown is located at the lower edge portion 4 of the lower tubular portion 2.
The diamond B of the ring A is positioned so as to approximately match the height of 1, and the ring A is photographed through the inside of the cylinder from above the upper cylinder portion 2 while shining light from the side of the ring A. is there. Further, FIG. 13 is a photograph taken by using the instrument of Japanese Patent Application Laid-Open No. 2-290542 in which the inner surface of the lower tube portion is configured to be red and placing the same ring A as the photograph of FIG. 12 therein. The photographed diamond is a nearly ideal brilliant cut.

Comparing these photographs, in the photograph by the conventional device shown in FIG. 13, a peculiar beautiful pattern based on the reflected light of diamond can be observed as disclosed in JP-A-2-290542. That is, the diamond pattern shown in FIG. 13 is composed of white and several types of red (gray in the attached photo) having different color tones and lightness. Of these, the white part is the part where the light incident on the diamond from the upper 20 to 50 ° range is reflected and returned as it is, and the light red (pink) part is the part that is incident on the diamond from the upper 20 to 50 ° range. And a bright red portion where the colored light incident on the diamond after being reflected by the inner peripheral surface of the lower tube portion is mixed, is a portion where the colored light is reflected inside the diamond and returned as it is. In a brilliant-cut diamond with such ideal proportions, internal reflection occurs on almost all the cut surfaces, so the outline of the diamond itself is extremely clear, and the white part and bright red color are overall visible. The proportion of parts is very large. In addition, a white "arrow" that extends radially from its center in eight directions
Is very clearly recognized.

However, in the photograph of FIG. 13, the precious metal part to which the diamond is attached and other gemstones arranged around the diamond are dimly and vaguely reflected, and their colors and designs are almost discriminated. Can not. On the other hand, in the photograph taken using the device of the present invention shown in FIG. 12, the pattern of the diamond itself is shown in FIG.
Although it can be observed almost the same as the photograph of No. 2, it can be seen that the precious metal part to which the diamond is attached and other gemstones arranged around the diamond can be observed very clearly in a natural color.

The operation of the present invention will be described below. The upper tubular portion that constitutes the tubular body is made of a translucent material, paper, or the like, and appropriately transmits light. On the other hand, the lower tube portion has a structure in which light is not substantially transmitted or light is less transmitted than the upper tube portion. When observing or photographing an accessory with a diamond by the device of the present invention, the lower edge of the diamond crown is at the center of the lower end of the lower tube forming the device, and the lower edge of the diamond is the height of the lower edge of the lower tube. Position the diamond so that they are approximately in agreement.
Light enters the tubular body that constitutes the device through the open upper end and the upper tubular portion, and when viewed from the center of the lower end portion of the lower tubular portion where the diamond is located, light enters from the upper range of 20 to 50 °. It will be. Part of the light that has entered the tube directly hits the diamond, and the other part of the light is reflected by the inner surface of the lower tube, then becomes light having a color corresponding to the color of the inner surface of the lower tube, and then the diamond. Hit These lights that hit the diamond are returned to the crown direction by internal reflection,
Further, a part of the diamond penetrates to the pavilion side depending on whether the diamond is cut or not. Then, the light collected in the crown direction by the internal reflection reaches the observer or the camera lens.

In this observation, a characteristic pattern appears depending on the intensity of the reflected light from each cut surface of the diamond. That is, the part where the reflected light energy is the strongest is
Only the light incident from the upper 20 to 50 ° is reflected to appear white. Further, in other portions, the light incident from the upper range of 20 to 50 ° and the reflected light on the inner surface of the lower tube portion are mixed at various ratios, and the color is changed in several stages from a bright color to a dark color. appear. Further, a portion where little or no light is reflected and transmitted to the pavilion side is seen as blackened.

Therefore, since an ideal brilliant-cut diamond with good cut has internal reflection on almost all the cut surfaces, the contour of the diamond itself is extremely clear (the contour of the round appears clearly). Moreover, as a whole, the ratio of white parts and light-colored parts is very large. In a brilliant-cut diamond having an ideal proportion, white “arrows” radially extending from the center in eight directions are extremely clearly recognized.

On the other hand, a diamond with a rough cut and poor proportion has a small total reflection energy, and therefore has a small proportion of white portions and a large proportion of dark colors. Moreover, especially in the case of a diamond with a poor cut, the peripheral edge appears to be uneven and dark and chipped. This is because the light is transmitted to the pavilion side as it is without being internally reflected. Therefore, this part does not shine at all. Further, such a diamond does not have a regular pattern as a whole, and the above-mentioned "arrow" does not appear at all.

The principle of observing the pattern due to the reflected light of diamond as described above is considered to be the same as that of the device of Japanese Patent Laid-Open No. 2-290542, but the present inventors found that the lower edge of the diamond crown is lower. By observing the diamond by positioning it so that the height of the lower edge of the tubular portion is substantially the same as that of the lower edge of the tubular portion, only the diamond has a pattern reflecting the color of the inner surface of the lower tubular portion, as shown in FIG. It has been found that the precious metal parts and other jewelry can be observed in a completely natural color. The reason for this is not always clear.

In the device of the present invention, the angle formed by the line connecting the center of the lower end of the lower tube and the upper end of the lower tube and the axis of the lower tube is limited to 10 to 25 °. If the angle is out of this range, it becomes difficult to see the pattern. That is, if the angle is less than 10 °, the diamond looks dark in its entirety, and even a well-cut diamond cannot capture its pattern sufficiently clearly. On the other hand, when the angle exceeds 25 °, the diamond looks bright on the whole, and the pattern cannot be captured sufficiently clearly in this case as well. This is because if the above angle is too large (the inner diameter of the lower cylinder is too large for the height), the amount of light that directly hits the diamond is too large, while the angle is too small (the inner diameter of the lower cylinder is high). On the contrary, since the amount of light is too small, it is presumed that the pattern described above, which requires a delicate amount of light, cannot be achieved in any case.

Therefore, in the device of the present invention, the line connecting the center of the lower end and the upper edge of the lower tube is 10 ° to 2 with respect to the axis of the lower tube, regardless of the mode and size of the structure.
It is configured to have an angle of 5 °, preferably 15 ± 3 °. The size and the like of the device of the present invention are not limited as long as these conditions are satisfied, and for example, the device as a whole can be as large as a thumb.

In the device of the present invention, it is sufficient that the lower tube portion does not substantially allow light to pass or light does not easily pass as compared with the upper tube portion, and there is no particular restriction on the color of the inner surface of the lower tube portion. However,
The color of the diamond pattern observed depends on the color of the inner surface of the lower tube. For example, when the color of the inner surface of the lower tube portion is an achromatic color such as black or gray, gray is the basic color of the diamond pattern observed. When the color of the inner surface of the lower tube portion is chromatic, each chromatic color is the basic color of the diamond pattern. Therefore,
If you want to observe a beautifully colored pattern, set the color of the inner surface of the lower tube to a relatively bright chromatic color, such as red, blue, or green.
It suffices to select yellow, orange, pink, or similar colors, fluorescent colors, or the like. Further, it is also possible to configure the lower tubular portion in the vertical direction or the circumferential direction with two or more different colors.

The material of the upper tube is not limited as long as it can appropriately transmit light, and can be made of, for example, a semitransparent plastic material or glass material. Since it also appropriately transmits light, it can be made of such paper. Further, the color of the upper cylinder is not particularly limited, and is not limited to milky white or a white color, and there is no problem as long as it has an appropriate color as long as it appropriately transmits light. Further, in the device of the present invention, there is no particular limitation on the shape or cross-sectional shape of the tubular body, and the tubular body can be configured into any shape such as a cylindrical shape, a rectangular tubular shape, and a tapered shape. Further, by making the entire upper cylinder part or at least the upper part thereof into a truncated cone shape, the upper cylinder part does not enter the field of view during observation, so that the diamond pattern can be effectively observed. In this case, the entire upper cylinder portion may have a truncated cone shape, or only the upper portion thereof may have a truncated cone shape and the lower portion thereof may have a cylindrical shape.

Further, since the instrument of the present invention has a structure in which a magnifying lens is attached to the upper end of the upper cylindrical portion, the magnified diamond pattern can be observed, so that it is very easy to see and it is easy to judge the pattern. There is an advantage. Also,
When observing or photographing the jewelry with diamonds by the device of the present invention, no special lighting is required, but depending on the brightness of the place of use, the side of the jewelry to be observed or photographed and the side of the upper cylinder part In some cases, it may be preferable to positively irradiate the light.

[0026]

1 and 2 show an embodiment of the present invention, in which reference numeral 1 denotes a tubular body which is an instrument main body, and the tubular body 1 has a structure in which the lower end and the upper end are opened 5,4. The cylinder 1
Is composed of a lower tubular portion 2 and an upper tubular portion 3 which is continuously provided above the lower tubular portion 2. The lower tube portion 2 is made of a material that does not substantially transmit light. The inner surface of the lower tube portion is formed in a chromatic color such as red, blue, yellow, or green when it is desired to observe a beautifully colored diamond pattern. The lower tube portion 2 is configured such that the line connecting the center of the lower end portion and the upper edge portion forms an angle α of 10 ° to 25 ° with respect to the axis of the lower tube portion. This angle α is especially 15 ± 3 °
A degree is preferable. The upper cylindrical portion 3 is made of a material such as a semitransparent material such as plastic or glass or a thin paper that appropriately transmits light.

FIG. 3 shows another embodiment of the present invention, in which a magnifying lens 6 is provided at the upper end of the upper tubular portion 2. This magnifying lens may be a so-called paper lens. Since the other structures are similar to those of the embodiment shown in FIGS. 1 and 2, the same reference numerals are given and detailed description thereof is omitted.

FIG. 4 and FIG. 5 show the holding means 10 for the cylindrical body 1.
1 shows an embodiment of a device including a holding means 10
Is composed of a screw portion 8 provided on the lower portion of the outer surface of the lower tubular portion 2, a ring 7 screwed to the screw portion 8, and three leg portions 9 connected to the ring 7. This holding means 1
With 0, the holding height of the cylindrical body 1 can be arbitrarily adjusted by changing the screwing position of the ring 7. Also, the above 3
A transparent dome-shaped member may be used as the leg instead of the leg 9 of the book. 1 and 2 for other configurations of the cylinder.
Since it is the same as the embodiment shown in, the same reference numerals are given and detailed description is omitted.

FIG. 6 shows another embodiment of the device provided with the holding means 10 'for the cylindrical body 1. This holding means 10' is
The cylindrical body 1 is composed of a base 11, a column 12 standing on the platform 11, an arm 13 extending horizontally from the column 12, and a holding ring 14 attached to the tip of the arm 13. It is retained by the retaining ring 14. The arm 13 has hinge portions 15a to 15c at several places so that the position of the held cylindrical body 1 can be freely adjusted. The configuration of the tubular body 1 is shown in FIGS.
Since it is the same as the embodiment shown in, the same reference numerals are given and detailed description is omitted. FIG. 7 shows an embodiment in which the device of the present invention is attached to the camera itself, and 17 is a camera. The configuration of the tubular body 1 itself is the same as that of the embodiment shown in FIGS. 1 and 2, and therefore, the same reference numerals are given,
Detailed description is omitted.

When observing or photographing a ring A with a diamond as shown in the drawing using the above instrument, for example, a diamond B is placed at the center of the lower end of the lower tubular portion 2 constituting the instrument. The lower edge x of the crown is the lower cylinder 2
The diamond B of the ring A is positioned so that the height of the lower edge 41 is substantially the same. At this time, the ring A may be left fitted on the finger, or may be held by the finger or an appropriate holding stand 16 as shown in FIG. Further, the tubular body 1 has holding means 10, 10 as shown in FIGS. 4 to 6.
Those that do not have 'may be held by hand. Further, as shown in FIG. 7, when the cylinder body 1 is directly attached to the camera, the camera may be held by an appropriate holding means.

It is not particularly necessary when the natural light or the room light satisfactorily strikes the ring A from the side, but otherwise, as shown in FIG. 2 or the like, the light or the reflection plate from the side of the ring A is used. Use a mirror or the like to apply natural light to make it easier to see the precious metal parts and other jewelry around the diamond B. In addition, depending on the brightness of the place to be observed, if necessary, as shown in FIG. 2 or the like, the upper cylinder portion 2 is irradiated with light light or natural light using a reflection plate (mirror or the like) from the side thereof, so that Try to take in light positively in 1. In this state, the ring A is observed from above the upper tubular portion 2 through the inside of the tubular body or photographed with a camera. In addition, when simply observing the ring, use a device with a lens as shown in FIG.
Alternatively, a magnified image can be observed by placing a magnifying glass or the like above the instrument as shown in FIG. 1 for clearer observation. When photographing a diamond with the device of the present invention, a device without a magnifying lens (a device shown in FIG. 1 and the like) is used, and a lens such as a camera (a close-up lens in the case of a camera) is attached to the upper end of the upper cylinder part. Take a close shot.

By the way, when photographing a jewelry item with a diamond by the photographing method of the present invention, it is necessary to orient the crown of the diamond with respect to the camera lens in the correct direction.
It is preferable for capturing patterns that best reflect the state of diamond cutting. 8 to 10 show an embodiment of a holding table for holding an accessory to be photographed and finely adjusting the direction of the diamond with respect to the camera lens. The holding table 18 includes a disk-shaped base portion 19 having a hollow inside, a swing member 23 arranged inside the hollow portion of the base portion 19, and a holding member 27 attached to the swing member 23. have.

The base portion 19 has three legs 21 on the bottom thereof, and the height of these legs 21 can be adjusted by an adjusting screw 22. Further, an opening 25 is formed in the center of the upper portion of the base portion 19, and a projection 20 composed of a shaft body whose upper end edge is chamfered is provided on an inner bottom portion immediately below the opening portion 25. The oscillating member 23 is a disk-shaped member having a ring-shaped flange portion 31, has a tapered recess 24 in the center of the lower surface thereof, and has a fitting for mounting a holding member in the upper center thereof. A joint portion 26 is provided so as to project. The swing member 23 is disposed inside the hollow of the base portion 19, and the tip of the protrusion 20 of the base portion abuts on the inner surface of the tapered recess 24, so that the swing member 23 is swingably supported by the protrusion 20. In this state, the fitting portion 26 projects upward from the opening 25.

A spring for urging the flange portion 31 of the rocking member 23 downward in the hollow portion of the base 19 out of the three locations at 120 ° intervals in the circumferential direction of the base 19. 29 is provided, the other two places are attached to screw holes penetrating the upper part of the base portion 19, and the tip end of the swing member 2 is provided.
The adjusting screw 30 is provided in contact with the flange portion 31 of No. 3. The holding member 27 has a groove (not shown) for fitting the ring A in the upper part thereof, and a recess for fitting the fitting portion 26 of the swinging member 23 in the lower part thereof.

According to such a holding base 18, by moving the two adjusting screws up and down, the swinging member 23 biased by the spring 29 at one position can be held in an arbitrary state. , The ring A held by the holding member 27
The direction of diamond B can be adjusted freely. For example, when observing or photographing a necklace or the like, the holding member 27 may be replaced with a holding member 27 'shown in FIG. 10, and the holding member 27' may hold the necklace A '.

The device of the present invention can be made by rolling paper or a thin plastic sheet as a whole. FIG. 11 shows an example of manufacturing such a device. Prepare a relatively thin piece of paper (any color can be used as long as it is a piece of paper that transmits light as it is), and place it under the appropriate range. Is colored (the color of the inner surface of the lower tube portion), and an adhesive margin b is provided, and the paper piece a is rolled to form the tube body 1. In the tubular body 1 made of paper or a thin plastic sheet as described above, light enters the tubular body through the upper tubular portion 3. On the other hand, some light enters the cylinder through the lower cylinder 2, but there is no problem because the amount of incident light is much smaller than that of the upper cylinder 3. Further, instead of coloring the lower tube portion 2 as described above, an outer tube that blocks the transmission of light may be fitted on the outside of the tubular body portion corresponding to the lower tube portion.

[0037]

According to the present invention described above, not only can the characteristic pattern unique to diamond be observed (or photographed) as in the case of conventional instruments, but also the precious metal part to which the diamond is attached and the periphery of the diamond. Another effect is that other jewels that are studded can also be observed (or photographed) clearly at the same time in their natural color.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the embodiment shown in FIG.

FIG. 3 is a vertical sectional view showing another embodiment of the present invention.

FIG. 4 is a partially cutaway front view showing another embodiment of the present invention.

5 is a plan view of the embodiment shown in FIG.

FIG. 6 is a partially cutaway front view showing another embodiment of the present invention.

FIG. 7 is a partially cutaway front view showing another embodiment of the present invention.

FIG. 8 is a vertical cross-sectional view showing an embodiment of a holding table for ornaments.

9 is a plan view of the embodiment shown in FIG.

10 is a vertical cross-sectional view showing a state in which the holding member of the holding table in FIG. 8 is replaced with another one.

FIG. 11 is an explanatory diagram showing a case where the device of the present invention is manufactured from paper or the like.

FIG. 12 is a photograph of a ring with a diamond photographed using the device of the present invention.

FIG. 13 is a photograph of a ring with a diamond taken using a conventional device.

[Explanation of symbols]

1 ... Cylinder body, 2 ... Lower cylinder part, 3 ... Upper cylinder part, 4,5 ... Open end,
6 ... Magnifying lens, 10, 10 '... Holding means, 16, 18
... holding table

Claims (4)

[Claims] 1. A cylindrical body having an open upper end and a lower end, which is composed of a lower tubular portion and an upper tubular portion continuous with the upper portion thereof, wherein the upper tubular portion transmits light appropriately. The lower tube portion has a structure that substantially does not allow light to pass through or is less likely to pass light than the upper tube portion, and the lower tube portion has a line connecting the center of the lower end and the upper edge portion. 10 ° to the part axis
An observation tool for jewelry or ornaments configured to have an angle of 25 °. 2. The jewel or ornament observation tool according to claim 1, further comprising a magnifying lens at an upper end of the upper tube portion. 3. The jewelry or accessory observing instrument according to claim 1, wherein the upper cylinder portion is made of a semitransparent material or thin paper. 4. A method of photographing diamond or jewelry with diamond using the device according to claim 1, wherein a lower edge portion of a diamond crown is provided at a central portion of a lower end portion of a lower tubular portion constituting the device. The diamond or the diamond, characterized in that the diamond is positioned in such a manner that the height of the lower cylinder substantially matches the height of the lower edge of the lower cylinder, and the diamond or jewelry with diamond is photographed through the inside of the cylinder from above the upper cylinder. How to shoot accessories.