DE2313783C3 - Device for determining the evaluation data of colored gemstones, in particular diamonds - Google Patents

Description

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for each gemstone measured, objects emerge from the tip of the lower part of the diamond

^ÜV 1 ^A ^ ^US η ^{86 ü} ^ ^T of ^ Z ^Se »! ^ne S ^? ^UD ? u ^measured " ^{the light an} *" by corresponding difference image

make giving rating values. The device can eliminate the photocell outputs.

SOU allow, in addition to the well so far _To have _{the open bottom edge of the housing} similar _uses j _s

by a measuring device controllable weight also the 5 expediently a sealing ring for the attachment of the barrel canoe

exercise, previously subject to assessment, of the above-mentioned light tightness

the value of a gemstone objectively as a measuring closure forms

determine the result To measure stars of very different sizes zv

The solution to this task. · Takes place with a previous ability, it is preferably provided that the holding direction of the type described above according to the io tion exchangeable in a lower part of the Vorrich invention by an ellipsoid mirror, in the device of which is mounted so that mountings of different a focal point, the light source is arranged, can use a size.

währcid the holder for the gemstone in such a way. A particularly preferred embodiment dei

is ordered that the other focus of the EUip invention provides that the bracket is a Drehbai

soid mirror lies m the girdle plane, is through a 15 and pivotably mounted body, in desser

light-tight closure on the holder around the Fas- Inside a box containing the photocells turn-

s edge of the gemstone around, furthermore by photo fixed but pivotable, the gemstone

cells in the holder opposite the lower part of the disc, which is exchangeably mounted on the holder.

Edelstems and by photo cells in which is stored by the ben.

a focal point and at right angles to the connection 20 A light-tight closure of the bracket in the non-axis Between the two focal points, parts run despite the pivotable and rotatable positions Level. tion of the bracket can be achieved according to a

An ellipsoid mirror has the property that all moderate embodiments of the invention are characterized by Lichtstrah- emanating from its one focal point that the holder with a spherical casing ring in len are reflected in the other focal point. 25 a corresponding spherical jacket ring of the sub-To this it is also already known that the light source is partly supported by the device. in a focal point and the object to be examined in the other focal point of an ellipsoidal game, there may be a light-guiding glass fiber bundle, to arrange mirror (Kleen-Müller, Hrsg .: whose end lying in a focal point an ab-laser, Springer-Verlag 1% 9, p. 129, and DT-OS 30 has a beam characteristic of 180 °, e.g. half-1797 547). However, it has not been known to be spherical.

like this property of rotation ellipsoidal mirrors. The light source can also be a laser,

in a device of the type mentioned above, sen laser beam for measuring brilliance in a matted

can be exploited. This property has to be led to the glass ball, which is in a focal point

As a result, all of them are located away from the one focal point.

In a further embodiment of the invention is zui Upper part of the measurement of existing inclusions in the gemstone in front of the gemstone located in the other focal point be reflected, d. H. the whole seen that the laser beam preferably by means of radiated light gets into the gemstone and that of an adjustable mirror parallel to the connection from the Gemstone reflected light can be shifted practically in a perfectly straight line between the focal points. Men to the photocells that surround the light source. The gemstone can be rotated in its holder are arranged. The in the holder below the and at the same time the laser beam slowly radially to the The gemstone-arranged photocells receive the gemstone moving, the output of which is in the dei Light that is "lost," d. H. So those photocells arranged on the bracket have a kind of spiral part of the light coming through the underside of the precious 45-shaped development of the volume of the precious stone stone is blasted. This through the bottom provides, from which the location, size and character of all of it Gemstone's radiated portion of the light of the min- ium existing inclusions in the gemstone lens changes the "brilliance" of the gemstone and thus its can be read.

Quality and is mainly due to a use in the device according to the poor Cut, but also through the presence of monochromatic light of a spectral being of inclusions as well as in the absorption of the apparatus or a so-called tunable «] Steins. One can therefore with the device according to dye laser, then one can dei the measurement result the invention by a simple difference formation photo cell outputs by comparison with a punch wipe use the incident light and the dard spectral curve to determine how little light is received from the photocell about the color and intensity of the noble or how much light is absorbed by the stone. to get steins.

The holder is in the device according to the In the following description of some embodiments

Invention rotatable and around the other focal point approximately examples, the invention is explained, wherein

pivoted, so that reference is made to the drawings by pivoting. In the

The setting of the gemstone in the device also shows 60 drawings

can eliminate the per se small error, the F i g. 1 shows a schematic vertical section through

by the presence of the photocells around the light- an embodiment of the device according to dei

source around with regard to the reflective surface of the invention,

Ellipsoid mirror is caused. F i g. 2 shows a different execution in a detailed section

The holder can be a hollow cone or hollow pyramid shape of the holder according to the invention,

be miden-shaped or box-shaped housing, on FIG. 3 a detailed section of a variant of the holding

its bottom and on its side walls a photo,

cells are arranged so that the known F i g. 4 the same in a detailed section

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^{Stdle mentioned} that ^ in th s loading ^ A "?" ** ^"de 'phrase» Camera ^{11 SiMe m veretehen a1} ^

and extends in the FotozeSS 36 of the S "*" ^{21 hinei} "-that they are of Brin ^{is arrange} t the underside S lie. The Halterungiii is _a J η""^

not shown Mo ^ J? ^ 28 attached so that the Halte ™ J of the arrow 32 is rotatable isL Tm ⁸ lower part 12 has an EdÄJV a Kugelmantcliing in which the Halt ^

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for measurement of brfflance

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- 6 ^"S P ^{Itze de} s Brilliant again ^un g ^erecl" made corruption ^{avoid the} s, can mar, according

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is mounted pivotably in the direction of arrow 131 in the device. The outputs of the photocells 136, 136 ' can therefore be obtained directly via connecting wires. In a recess 138 in the upper side of the holder 128 , two thin sheet metal or plastic disks 139 are exchangeably mounted, which fit around the edge of the diamond 21 with a center hole 140. For different sized diamonds 21 there are different sheet metal disks 139

following shortly before 180 degrees increasing several times and then decreasing again at 57 ', 57 ", 57"' and 57 "" becomes recognizable, i.e. H. a crack that occurs only once indicates a small inclusion, 5 while a sudden jump in the curve indicates a large inclusion. The intensity of the Light scattering by the inclusion follows from the height of the jump in the curve according to FIG. 8 and allows a conclusion about the peculiarity of the inclusion

with different sized hole 140 interchangeable in io ses to, ie whether it is a bladder or a

the recess 138 to be arranged. To reduce the sliding friction, the joints 141 can be coated on both sides with a sliding coating, ζ. B. Tetrafluoroethylene, be provided.

by pivoting the diamond back and forth in the direction of the double arrow 31 (at right angles to the plane of the drawing in FIG. 1) and the laser beam 46 as. described above can wander radially to the diamond. The procedure for determining the color, color intensity and color absorption of a diamond is as follows: A spectral apparatus is connected upstream of the light source 39 ″ or a tunable dye laser is used as the laser 45 and irradiated

massive confinement.

Of course, instead of the spiral-shaped »development« of the diamond, you can change its volume, also in a different geometrical way »ab-

According to FIG. 4, a laser 45 can also be used as the light source, for example moving back and forth in a zigzag shape, the laser beam 46 of which is marked with ". _ .... _. .

a mirror 44 is deflected into the interior of the device 10. The mirror 44 is expediently attached to a tube 39 ' with a holder 43, a frosted glass ball 47 being attached to the lower end of this tube 39' , which emits the laser light over 180 ° into the interior of the reflector part 14 . In the installed state, the ball 47 is at the focal point 18 according to FIG. 1.

To determine the presence of inclusions 25 the brilliant-cut diamonds with monochromatic light in the sen in a brilliant 21 as well as the nature and color sequence of the spectrum from ultraviolet to blue, the size of these inclusions is green, yellow, red to infrared in a further embodiment. The outputs of the Fotoder invention provided that the opening 38 in the cells are continuously recorded, what cap 16 for the passage of the light guide bundle 39 in F i g. 9 is shown with the curve 73, wherein the or of the tube 39 'has a slot-shaped opening 30 abscissa 71 in FIG. 9 is the wavelength of the light, the length of which indicates approximately the radius of the largest and consequently its color, while the ordi · measuring diamonds corresponds to 21 , with nate 70 indicating the light transmission at the same time. The resulting from the photocells 37 to form a slot-shaped curve 73 for the diamond in question becomes a part of this photo, labeled 41 , next to the standard color transmission curve 72 of a cell, so that here too a radial diamond is the highest Quality recorded. The location slot 42 is created. According to the illustration of the valleys and peaks of curve 73 for wavelength development in FIG. 5 using a laser 50, the light and consequently the color on the abscissa whose laser beam 51 in turn via a mirror 71 provides information about the color or shade of the 53 is deflected, this laser beam 51 through a diamond, the color of which is the complementary tube 54 into the interior of the device 10 len- 4 ° color to the color indicated on the abscissa 71, but this tube 54 is open at the bottom and is the size of the transmission difference. The double arrow 55 is intended to schematically indicate a front between the standard color transmission curve 12 direction, with which the tube 54 with the and the measurement curve 73 provides information about the internal mirror 53 in the longitudinal direction of the slot 38 versus the color of the diamond. The integral over which is slidable. If the diamond 21 is now rotated in the differential area 74, 75, in turn, a sum direction of the arrow 32 in FIG. 1 and, as a result of the color properties of the measured diamond, slowly moves the tube 54 with the mirror 53 compared to the standard diamond in the longitudinal direction of the slot 38, then the curve 72 is shown.

Outputs of the photocells 36 or 36 " a kind of spiral Since practically all light sources in their light output

shaped development of the volume of the diamond 50 radiation fluctuate and also the light absorption 21 represents what is shown in FIG. 7 by the spiral line 56 a diamond for the quality of which a decisive one is interpreted. F i g. 8 shows an example of such a factor, it is for the brilliance as for the processing of the output of the photocells 36. The final and the color measurement to achieve the absolute abscissa of the diagram in FIG Reference value for the fertilizers 1, 2, 3 etc. of the spiral line 56 to have the amount of light fed in after 55. This can be achieved because angular degrees can be subdivided, while the ordi-by means that a certain proportion nate in FIG. 8 the size of the output of the photo of the light of the light source from the feed-in cells 36 indicates the luminous flux branches off and measures, with this measurement result-

If now a diamond 21 according to FIG. 6 two units contains a scale or a reference value for the inclusions 57, 60, then the small input θο is the amount of light fed. In practice you can Execute conclusion 60 as a result of the scattering caused by it in that one of the light guide bundle 39 of the laser beam branches off only in the spiral thread 3-4 at about a certain part of the optical fibers 270 angular degrees as curve span 60 ', while to a photocell and its output as the very large inclusion 57 in the spiral gears 3-8 and used reference value

For this purpose 3 sheets of drawings

609 632/188

Claims (11)

1 2 (53) is displaceable parallel to the connecting line between the two patent claims (18, 19). 12. The device according to claim 9, characterized 1. Device for determining the evaluation indicates that the laser (45) has a timed data of colored gemstones, in particular brilliant 5 bar dye laser. th, with an adjustable bracket for the 13th device nscn claims 1 to 8, Gemstone, with a light source and with photo cell, characterized in that it is used as a light source len for measuring the reflected and translucent a spectral apparatus for feeding mono- incandescent light, characterized by chromatic light, an ellipsoidal mirror (20), in one of which io Focal point (18) the light source (40, 47) is arranged, while the holder (26, 26 ') for
the gemstone (21) is arranged such that the other focal point (19) of the eipsoid mirror (20) The invention relates to a device for fixing the girdle level (22) lies through a light »5 position of the evaluation data of colored gemstones, tight closure (34) on the holder (26, 26 '), in particular diamonds, with an adjustable neck the barrel edge (23) of the gemstone (21) for the gemstone, with a light source and around, through photo cells (36, 36 ', 36 ") in the shark with photo cells to measure the reflected and sion (26, 26 ') with respect to the lower part of the translucent light. Gemstone (21) and photocells (37) in the ao The invention is explained in the following in its application of the one focal point (18) and right-angle in a diamond, but it is in the same or analogous manner to the connecting axis between the two likewise to the plane running to the fixed focal points (18,19). position of the evaluation data of other colored gemstones 2. Device according to claim 1, thereby applicable. indicates that the holder (26, 26 ', 128) 25 for the evaluation of cut diamonds, rotatable (32) and around the other focal point, ie of brilliant-cut diamonds, various criteria are measured (19) pivoted (31). giving, namely its weight, its cut, its 3. Apparatus according to claim 1 or 2, there purity and its color. Only that given in carats characterized in that the holder (26, 26 ') bene weight of a diamond is a size which a hollow cone, hollow pyramid or box shape - can be determined with measuring instruments, namely a scale total housing is. is, while the remaining evaluation data is so-called 4. Apparatus according to claim 3, characterized in that- are "assessment variables", d. i.e., they are from indicates that around the open bottom edge of the eye of a professional - usually under Housing a sealing ring (34) for attaching the use of a magnifying glass with 1X magnification - Barrel edge (23) is arranged. 35 established and assessed. It is obvious, that 5. Device according to one of the preceding this assessment even with the strictest observance of the Claims, characterized in that the shark assessment rules can be different, (26, 26 ') exchangeable in a lower part and not only in borderline cases, especially since the (12) the device (10) is stored. different evaluation criteria on the different 6. Apparatus according to claim 2, characterized in that 40 evaluation data have an influence. For example, it indicates that the holder (128) is a rotatable body for the brilliance and the fire of a diamond in front of bar (130, 130 ') and pivotably mounted, in addition to the quality of the cut, in its interior the photocells (136, but also its purity and its color. It is 136 ') containing box (126) rotatably but already a device for color determination is mounted pivotable, the gemstone (21) 45 known fener diamond, which consists of a Holder for in exchangeable on the holder (128) ge the diamond is mounted below its girdle under completely mounted disks (139). like to expose the upper part, with over the 7. Apparatus according to claim 6 or 7, holder a source of monochromatic light, characterized in that the holder (26, is seen, while above the diamond a 26 ', 128) with a spherical jacket ring (27, 27', 50 photoelectric receiver is arranged With this 127) in a corresponding spherical jacket ring device, the color of the ground slide (25, 125) of the lower part (12) is to be stored. manten are measured with this device 8. Device according to one of the preceding, however, no repeatably constant, d. H. Claims, characterized in that the absolute measurements are possible, specifically in particular the light source is a light guide element (39) whose 55 is special because in this known Vorrichim a focal point (18) lying end (40) direction neither the light of the light source completely in has a radiation characteristic of 180 °. the diamonds still get all of the brilliant 9. Device according to one of claims 1 th reflected light for photoelectric receptivity 7, characterized in that the light source arrives ger. The determination of other ratings Laser (45) is. 60 data of diamonds is with this well-known advantage 10. Apparatus according to claim 9, thereby direction not possible at all, indicates that the laser beam (46) in a. The object of the invention is to provide a frosted glass ball (47) or glass hemisphere device for determining the evaluation data is directed, which in a focal point (18) on a colored gemstone, in particular a diamond, is ordered. 65 to create this evaluation data as a measuring device 11. The device according to claim 9, characterized objectively and independently of human beings, that the laser beam (51) detects preferential influences so that they are obtained in this way By means of an adjustable (55) mirror, evaluation data can be repeated as often as required and