Device for screening crystals
(57) Abstract:Usage: devices for sorting minerals. The inventive device for screening crystals containing a hopper for feeding the crystal holder of the crystal can be rotated relatively to the horizontal or vertical axis, the latch crystal, the flushing mechanism of the crystal in the receiver and an optical system that has at least one holder of the crystal and another retainer of the crystal, the tabs are made with a hole in the bottom with size, large size crystal holders crystal provided with a diaphragm with a hole whose size is smaller than the crystal, while the latches are installed on the holder of the crystal, made with the possibility of movement along the vertical axis and can be in the form of a funnel or cylinder, and the mechanism of drop crystal made in the form of a lever or plunger. 6 C. p. F.-ly, 4 Il. The invention relates to means for sorting minerals and can be used mainly for screening crystals with a pair of parallel faces, for example having the shape of a cube, octahedron, parallelepiped, etc.Know the mouth is nick crystals  In this device, the analysis of crystals for sorting is carried out during a free fall of the crystal through the optical system.A disadvantage of the known device is the low efficiency of its use for screening, for example, crystal diamond on the content of impurity nitrogen, because the magnitude of the useful signal in the analysis depends on the orientation of the crystal relative to the beam, which is random, which leads to significant errors when sorting.The closest known for the invention is a device for screening crystals containing a hopper for feeding the crystal holder of the crystal can be rotated relatively to the horizontal or vertical axis, the latch crystal, the flushing mechanism of the crystal in the receiver and the optical system comprising a radiation source and located along the radiation optics for forming radiation and the photodetector  In this device, a load operation, measurement and sorting are performed sequentially in a single holder.The disadvantage of this device is the low productivity of the sort.The technical result of the invention is to improve the performance of the sort.The technical result is achieved in that the device for screening crystals, sod the school or vertical axis, the latch of the crystal, the flushing mechanism of the crystal in the receiver and the optical system comprising a radiation source and located along the radiation optics for forming radiation and the photodetector, is further provided with at least one holder of the crystal and another retainer of the crystal, the tabs are made with a hole in the bottom with size, large size crystal holders crystal provided with a diaphragm with a hole whose size is smaller than the crystal, with the clips installed on the holders of the crystal.The best result is achieved when the size of the hole in the lower part of the retainer equal 1,01 1.2 size of the crystal.The difference is that the holders of crystal made with the possibility of rotation about the vertical or horizontal axis.Another difference is that the device is further provided with a mechanism for dropping the crystal, and the latches is configured to move along the vertical axis.In this case, the difference may be that the mechanism of drop crystal made in the form of a lever.Another difference may be that the mechanism sbresini in the form of a funnel.The difference may be in the fact that the catches made in the form of a cylinder.As the experiments showed, the crystal orientation in the analysis is determined by the size of the holes in the lower part of the retainer. In particular, the diamond crystals when the claimed size of the holes fall on the holder of one of the pairs of parallel faces.The ability to move the tabs along the vertical axis facilitates the replacement of the working set of tabs.In Fig. 1 schematically shows the inventive device of Fig. 2 a top view; Fig. 3 the mechanism of drop crystal in the form of a lever; Fig. 4 - the mechanism of drop crystal in the form of a pusher.The device has an optical node including, for example, source 1 UV radiation, a system of lenses and mirrors 2, filter 3 and the photodetector 4, the holders 5 crystals with a diaphragm 6 and the projection 7 installed along the perimeter of the circular horizontal table 8 made with the possibility of rotation on 360 degrees. around the Central axis OO. Such holders may not be less than two, this device is made of six holders. On the table 8 above each holder 5 has a removable retainer 9 crystal position, made for example in the form of a funnel, Cristallo. The actuator device is made in the form of an electromagnet 11 with a movable rod 12 which is connected with the stop 13. The device has a hopper with metering device 14, for example a vibrating hopper with dvoryanin electromagnetic feeder, the feed crystals individually. The holders 5 crystals can be executed with a possibility of rotation in the horizontal plane, or can be rotated around a horizontal axis AA by an angle sufficient to crystal slid off the holder in the receiver (not shown). In the first case, the rotation of the holder 5 is provided with the cooperation of the protrusion 7 of the holder 5 with the stop 13 of the rolling stock 12 of the electromagnet, in the second case, the rod 12 is connected with the loose on the horizontal axis of the end holder 5.The device may be accomplished by flushing mechanism of the crystal in the form of a lever 15 (Fig. 3) or of the pusher 16 (Fig. 4).The device operates as follows.Crystals of the source material from the hopper 14 to one under gravity fall through a chute (not shown) in one of the tabs 9 and placed over the aperture 6 of the holder 5. System emitter - receiver optical node proizvodyashchego material taken diamond. The permissible content of nitrogen amplified signal exceeds the threshold of the electromagnet 11, the rod 12 is moved together with the stop 13, which rests upon rotation of the table 8, the protrusion 7 of the holder 5 of the analyzing crystal. The holder 5 is rotated around the vertical axis OO and crystal, deprived of the support, falls into the receiver. When the opposite result, the electromagnet 11 is not activated, the holder 5 during rotation of the table 8 remains stationary with respect to the crystal, and the dropping of the crystal occurs when the contact protrusion 7 with another fixed stop (not shown) in another branch of the receiver. By means of a spring (not shown), the holder 5 is returned to its original position.In modifications of the device containing the mechanism of dissolution of crystals, the movement of the crystal in the receiver is under the influence of the stem 12 of the electromagnet 11 on the spring-loaded lever 15 or the plunger 16. The lever 15 or plunger 16, moving to the crystal, raise the latch 9, allowing the crystal to fall from the holder 5 into the receiver.The device allows you to sort the crystal size of 0.3 to 10 mm when using removable clips with different holes is the Eraly signs, the presence or absence of which affects the magnitude of the useful signal. for example, by color, impurity content, etc., 1. Device for screening crystals containing a hopper for feeding the crystal holder of the crystal can be rotated relatively to the horizontal or vertical axis, the latch crystal, the flushing mechanism of the crystal in the receiver and the optical system comprising a radiation source and located along the radiation optics for forming radiation and the photodetector, wherein it is further provided with at least one holder of the crystal and another retainer of the crystal, the tabs are made with a hole in the bottom with larger die size, the holders of the crystal is provided with a diaphragm with a hole whose size is smaller than the crystal, when the clips are installed on the holders of the crystal.2. The device under item 1, characterized in that the size of the hole in the lower part of the retainer equal of 1.01-1.2 crystal size.3. The device under item 1 or 2, characterized in that the clamps are designed to move along the vertical axis.4. The device according to p. 3, characterized in that IU is aNISM drop crystal is made in the form of a pusher.6. The device under item 1, characterized in that the tabs of the crystal is made in the form of a funnel.7. The device under item 1, characterized in that the tabs of the crystal is made in the form of a cylinder.
FIELD: testing of precious stones.
SUBSTANCE: diamond is fixed onto holder and tested under specified angle for getting image. Then second measurement is made for getting two sets of data calculated by means of computer. The second set of data can be received by means of measurement of depth or due to changing direction of viewing.
EFFECT: improved precision of localization.
6 cl, 2 dwg
FIELD: technology for processing diamonds into brilliants.
SUBSTANCE: in the method, by experimental or calculation-theoretic way in glow images visible to observer optical characteristics of diamond glow are determined, including glow intensiveness, glow glimmer and color saturation of glow, characterized by level of decomposition of white color on rainbow colors, and also relief coefficient of glow, characterized by average number of intensive color spots in glow image, distinctive to human eye, and additionally, by dividing glow image on compound portions, average values of glow intensiveness of compound portions are measured. Optical characteristics of glow are transformed to glow factors. As average coefficient of brilliant glow charm, which is used to estimate brilliant glow charm, charm coefficient is used, calculated as average value of factors of intensiveness, glimmering, color saturation and glow image geometry.
EFFECT: possible objective measurement and numeric estimation of brilliants glow charm, and possible certification of them on basis of glow charm.
5 cl, 22 dwg, 11 tbl
FIELD: investigating or analyzing materials.
SUBSTANCE: device comprises housing provided with solid body laser connected with the window in the heat insulating tank filled with liquid nitrogen and provided with the precious stone, semiconductor laser connected with the window, two spectrometers for detecting luminescence in the range of 550-10000 nm, and processor for processing signals from the spectrometers.
EFFECT: reduced sizes and simplified method of testing.
47 cl, 9 dwg
FIELD: registration of absorption spectra of small luminescent specimens.
SUBSTANCE: the absorption spectrum of small luminescent specimens is determined according to relation of intensities of light fluxes that have passed and not passed through the specimen, the luminescence of the standard specimen is used as the specimen through which the radiation flux has not passed, and the luminescence of the examined is used as the specimen through which the radiation flux has passed, and the absorption spectrum of the examined specimen is calculated according to the respective mathematical formula.
EFFECT: expanded functional potentialities due to the increase of the range of specimens suitable for measurements without special preparation of them.
FIELD: measuring technique.
SUBSTANCE: to determine if green-blue was subject ct to artificial irradiation or to ion bombardment, it is irradiated with light at wavelength of 633 nm for stimulation of luminescence emission, and luminescence is detected within range of 680 to 800 nm by using confocal microscope and spectrometer. Focal plane is canned in vertical along diamond. Quick reduction in luminescence accompanied with increase in depth points at natural illumination while even quicker reduction points at ion bombardment. Alternatively, to determine if diamond has to be natural/synthetic doublet, diamond is subject to irradiation at wavelength of 325 nm to stimulate emission of luminescence and luminescence is detected within 330-450 nm range. Sharp change in luminescence at increase of depth points at the fact that the diamond has to be natural/synthetic doublet.
EFFECT: ability of automatic precise evaluation.
44 cl, 10 dwg
FIELD: visual scope of mark onto face of precious stone.
SUBSTANCE: device for observing information mark on face 7 of precious stone 6 is made in form of casing 1 for jewelry. Casing 1 for jewelry has substrate 2 to keep ring 5 with precious stone 6 on top of it and rotating cap 3. Rotating cap 3 has opening 15 in its top part; opening has 10x lens 16, that's why when cap 3 is open and turned by 30° angle, face of 7 of precious stone can be seen through lens 18. Moreover precious stone is illuminated by light that enters casing through slot formed when cap is opened. Light falls onto face slantwise and is regularly reflected through lens 16. Scope can be used for internal and external observation.
EFFECT: simplicity at use; improved comfort.
38 cl, 4 dwg
FIELD: laser machine for analysis, grading and marking-out of untreated diamond.
SUBSTANCE: the machine has a laser scanning device, three-dimensional scanning system, matrix, masking device, electronic unit and a computer program for analysis of the diamond weight and characteristics of the brilliant or brilliants that can be obtained from an untreated diamond.
EFFECT: saved material and time, and enhanced capacity.
30 cl, 15 dwg
SUBSTANCE: present invention relates to the method and system for laser marking precious stones and, particularly to the method and system for engraving authentication codes. In the system for laser marking precious stones such as diamonds, marks consist of several microscopic dots, increase of which can be initiated upon effect on natural internal defects or impurities inside the precious stone of a strictly focused laser pulse sequence. The marks are inscribed by laser pulses, carrying significantly less energy than threshold energy required for inscription inside ideal material of precious stone. The method of laser marking and encryption takes into account random spatial distribution of defects, present in natural precious stones, as well as their much localised character. Authentication data are encrypted in the precious stone in the relative spatial arrangement of dots which form a mark. Dots, engraved under the surface of the precious stone, can be made undetectable to the naked eye and a magnifier through limiting their individual size to several micrometres. The mark can be detected using a special optical reading device.
EFFECT: laser inscription of permanent point marks inside precious stones.
40 cl, 14 dwg
SUBSTANCE: invention relates to artificail gem diamonds identifiable with a certain person or animal. A personalised gem diamond is grown from a charge that includes carbon being a product of carbonisation of the material provided by the customer, powder of spectroscopically pure graphite and a marker for which at least two elements are used that are selected from a lanthanide group and taken in a arbitrarily prescribed ratio to the extent between 0.01 to 10 mcg /g.
EFFECT: improved authenticity of identification of a personalised diamond.
1 ex, 3 dwg
SUBSTANCE: invention relates to devices which use ultraviolet radiation for testing objects, and is meant for sorting diamonds and, particularly for selecting diamonds from natural rough diamonds and cut diamonds with brown hue, where the selected diamonds are suitable for high-temperature processing at high pressure for decolouring, more specifically, type IIa and IIb, and IaB diamond crystals. A light-emitting diode with radiation peak in the wavelength range from 240 to 300 nm is used as the ultraviolet radiation source, and the detector of radiation transmitted through the tested diamond crystal is a photodiode. The electric signal from the photodiode is amplified with a converting amplifier. Intensity of radiation transmitted through the tested diamond crystal is indicated using a measuring device and in parallel using an indicator with operation threshold. The light-emitting diode is placed in a holder with a table. A narrow central hole is made in the table in order to pass radiation from the light-emitting diode. The tested diamond crystal is placed on the table, while completely covering this hole. The diametre of this hole is made smaller than typical dimensions of the tested diamond crystal. The photodiode is placed into the holder with possibility of changing its position relative the tested diamond crystal and possibility of fixing its vertical position, in line with the hole in the table, using a special detachable cover for the said table.
EFFECT: design of a mobile compact device for selecting diamond crystals, related to types IIa and IIb, and IaB, from rough diamonds or cut diamonds, suitable for decolouring and quality improvement through thermobaric processing.
2 cl, 2 dwg