10-02-2012, 02:55 PM
digital image processing
DIGITAL IMAGE PROCESSING.doc (Size: 158 KB / Downloads: 50)
What is a Diamond ?
Diamond is a natural gem known to mankind from prehistoric times and has been praised for centuries as a gemstone of exceptional beauty, brilliance and lustre. It is a symbol of richness and power. Graphite and Diamond are two allotropic forms of Carbon. In diamond, each Carbon atom is covalently single bonded to four other Carbon atoms in a tetrahedral manner.
The Impostors :
As Impostor is any gem that claims to be as good or better than, just like, as hard, more beautiful than, but cheaper than a diamond. The “Impostors” come in two groups, the stimulants and the synthetics. A stimulant is something that looks similar to a diamond but does not have the same properties (weight, specific gravity, refractive index, hardness, etc). Zircon is a natural stone (stimulant) often used to imitate diamonds. A synthetic is a man-made diamond that has all properties of a natural diamond. Cubic Zircon is a synthetic stone. Zircon is a substitute for diamond and Glass is a substitute for Zircon.
3. The pavilion(the bottom)
The size of the table, the symmetry of the facets, the thickness of the girdle, and the angle of the pavilion must all work together to give the diamond the sparkle that is wanted. The light enters the diamond through the crown, splits into white and colures light, bounces off the facets of the pavilion back up through thee crown, where it could be seen as a ‘Sparkle’. To achieve the maximum sparkle – that magic combinations of brilliance and fire – the diamond must be well cut and cut in the proper proportion. The typical diamond is cut with 58 facets, 33 on the crown and 25 on the pavilion. On a well- proportioned stone, these facets will be uniform and symmetrical. If they are not, the diamonds ability to refract light will suffer.
Dispersion:
Dispersion is the breaking up of white light into spectral colors. Prisms show that a beam of white light is composed of different light rays, each with its own wavelength. Each different wavelength is perceived as a different colour. Each ray of light has its own wavelength, direction of travel, and intensity.
DIGITAL IMAGE PROCESSING.doc (Size: 158 KB / Downloads: 50)
What is a Diamond ?
Diamond is a natural gem known to mankind from prehistoric times and has been praised for centuries as a gemstone of exceptional beauty, brilliance and lustre. It is a symbol of richness and power. Graphite and Diamond are two allotropic forms of Carbon. In diamond, each Carbon atom is covalently single bonded to four other Carbon atoms in a tetrahedral manner.
The Impostors :
As Impostor is any gem that claims to be as good or better than, just like, as hard, more beautiful than, but cheaper than a diamond. The “Impostors” come in two groups, the stimulants and the synthetics. A stimulant is something that looks similar to a diamond but does not have the same properties (weight, specific gravity, refractive index, hardness, etc). Zircon is a natural stone (stimulant) often used to imitate diamonds. A synthetic is a man-made diamond that has all properties of a natural diamond. Cubic Zircon is a synthetic stone. Zircon is a substitute for diamond and Glass is a substitute for Zircon.
3. The pavilion(the bottom)
The size of the table, the symmetry of the facets, the thickness of the girdle, and the angle of the pavilion must all work together to give the diamond the sparkle that is wanted. The light enters the diamond through the crown, splits into white and colures light, bounces off the facets of the pavilion back up through thee crown, where it could be seen as a ‘Sparkle’. To achieve the maximum sparkle – that magic combinations of brilliance and fire – the diamond must be well cut and cut in the proper proportion. The typical diamond is cut with 58 facets, 33 on the crown and 25 on the pavilion. On a well- proportioned stone, these facets will be uniform and symmetrical. If they are not, the diamonds ability to refract light will suffer.
Dispersion:
Dispersion is the breaking up of white light into spectral colors. Prisms show that a beam of white light is composed of different light rays, each with its own wavelength. Each different wavelength is perceived as a different colour. Each ray of light has its own wavelength, direction of travel, and intensity.