Method for rapidly screening artificial diamonds

Abstract

The invention relates to a method for rapidly screening artificial diamonds. Light exciting tested samples to give out light is incident light containing partial wavelengths or total wavelengths in arange of 400-900nm, the radiating area of the light source is large, and light in a wavelength range of 860-1100nm generated by the artificial diamonds under light source excitation is imaged and detected. Compared with other detection manners in the prior art, the method disclosed by the invention is simple and high in efficiency, low in equipment requirement and capable of realizing large-scalescreening.

Description

technical field

[0001] The invention relates to the field of diamond detection, in particular to a method for rapidly screening imitation diamonds. Background technique

[0002] Imitation diamonds, such as zircon and moissanite, are mixed in batches of diamonds. It is a time-consuming and laborious work to screen imitation diamonds from large quantities of diamonds (usually broken diamonds). Zircon is a silicate mineral, which is the main ore for extracting metal zirconium. Zircons are widely found in acidic igneous rocks, but also in metamorphic rocks and other sediments. The chemical properties of zircon are very stable, so gem-quality zircon can also be seen in river gravel, and gem-quality zircon after cutting is very similar to diamond. Moissanite is also a semi-precious stone that closely resembles diamond in appearance. However, the price of imitation diamonds such as zircon and moissanite is far from that of diamonds, and some unscrupulous merchants use them as di...

Examples

no. 1 example

[0067] The present embodiment provides a kind of method of rapid screening imitation drilling, such as figure 1 As shown, the method includes the following steps:

[0068] First, the first incident light source 1 is irradiated to a large-area measured area, where a batch of measured samples 4 can be placed. The first incident light source 1 is a light source with a wavelength in the range of 400-900nm. The sample 4 is generally a batch of diamonds or diamond-inlaid finished products, and the measured area is a workbench for placing samples in a large area.

[0069] Then, the sample 4 under test emits light after being excited by the first incident light source 1 , and the emitted light is filtered through the filter assembly 5 to filter out light including wavelengths in the range of 860nm to 1100nm.

[0070] Finally, after filtering, the imaging system is used for imaging. If the imaging system detects a sample with two points, it is judged and suspected that the luminescent...

no. 2 example

[0108] In this second embodiment, the difference from the first embodiment is that in this embodiment, there are two incident light sources, which are the first incident light source 1 and the second incident light source 1'.

[0109] Such as figure 2 As shown, after the first incident light source 1 and the second incident light source 1' are transmitted or reflected by the dichroic mirror 3', incident light of different wavelengths from two different light sources are simultaneously irradiated onto the sample as required. Because the wavelength of the incident light that is most likely to be excited by the fluorescence of different imitation diamonds may be different, it can ensure that different imitation diamonds can produce strong fluorescence in the wavelength range of 860-1100nm, which is more convenient for detection.

[0110] In other embodiments, the number of incident light sources may be selected to be 3 or more. Simultaneously irradiate three or more incident li...

no. 3 example

[0112] The present embodiment provides a kind of rapid screening method for diamonds in batches, such as figure 2shown. The second embodiment is different from the first embodiment in that: it also includes: the filter assembly filters out some or all wavelengths within 860-1100nm to the imaging system for imaging, and an illumination system is added when the filter assembly is removed Imaging the distribution of samples, and then superimposing the two images, can quickly locate the specific position of the imitation drill.

[0113] Use the illumination system 18 to irradiate the tested sample 13, and the distribution of the tested sample 13 is imaged; the two imagings (the imaging in the first embodiment is the first imaging) are superimposed to locate the imitation drill in the measured area specific location.

[0114] Under the illumination of the illumination system 13, an image in which the tested sample 13 can be seen is captured, and the image is reserved as a refere...

technical field

[0001] The invention relates to the field of diamond detection, in particular to a method for rapidly screening imitation diamonds. Background technique

[0002] Imitation diamonds, such as zircon and moissanite, are mixed in batches of diamonds. It is a time-consuming and laborious work to screen imitation diamonds from large quantities of diamonds (usually broken diamonds). Zircon is a silicate mineral, which is the main ore for extracting metal zirconium. Zircons are widely found in acidic igneous rocks, but also in metamorphic rocks and other sediments. The chemical properties of zircon are very stable, so gem-quality zircon can also be seen in river gravel, and gem-quality zircon after cutting is very similar to diamond. Moissanite is also a semi-precious stone that closely resembles diamond in appearance. However, the price of imitation diamonds such as zircon and moissanite is far from that of diamonds, and some unscrupulous merchants use them as di...

Examples

no. 1 example

[0067] The present embodiment provides a kind of method of rapid screening imitation drilling, such as figure 1 As shown, the method includes the following steps:

[0068] First, the first incident light source 1 is irradiated to a large-area measured area, where a batch of measured samples 4 can be placed. The first incident light source 1 is a light source with a wavelength in the range of 400-900nm. The sample 4 is generally a batch of diamonds or diamond-inlaid finished products, and the measured area is a workbench for placing samples in a large area.

[0069] Then, the sample 4 under test emits light after being excited by the first incident light source 1 , and the emitted light is filtered through the filter assembly 5 to filter out light including wavelengths in the range of 860nm to 1100nm.

[0070] Finally, after filtering, the imaging system is used for imaging. If the imaging system detects a sample with two points, it is judged and suspected that the luminescent...

no. 2 example

[0108] In this second embodiment, the difference from the first embodiment is that in this embodiment, there are two incident light sources, which are the first incident light source 1 and the second incident light source 1'.

[0109] Such as figure 2 As shown, after the first incident light source 1 and the second incident light source 1' are transmitted or reflected by the dichroic mirror 3', incident light of different wavelengths from two different light sources are simultaneously irradiated onto the sample as required. Because the wavelength of the incident light that is most likely to be excited by the fluorescence of different imitation diamonds may be different, it can ensure that different imitation diamonds can produce strong fluorescence in the wavelength range of 860-1100nm, which is more convenient for detection.

[0110] In other embodiments, the number of incident light sources may be selected to be 3 or more. Simultaneously irradiate three or more incident li...

no. 3 example

[0112] The present embodiment provides a kind of rapid screening method for diamonds in batches, such as figure 2shown. The second embodiment is different from the first embodiment in that: it also includes: the filter assembly filters out some or all wavelengths within 860-1100nm to the imaging system for imaging, and an illumination system is added when the filter assembly is removed Imaging the distribution of samples, and then superimposing the two images, can quickly locate the specific position of the imitation drill.

[0113] Use the illumination system 18 to irradiate the tested sample 13, and the distribution of the tested sample 13 is imaged; the two imagings (the imaging in the first embodiment is the first imaging) are superimposed to locate the imitation drill in the measured area specific location.

[0114] Under the illumination of the illumination system 13, an image in which the tested sample 13 can be seen is captured, and the image is reserved as a refere...

Images