CN-121994796-A - System for testing characteristics of precious stones

Abstract

A system for testing characteristics of precious stones. One aspect of the invention relates to a device (2) for illuminating precious stones (10), comprising a light projector (3) equipped with a main light emitting module (14 a), the main light emitting module (14 a) for generating an illuminance specifically configured to manifest the characteristics of the precious stone (10), said main module (14 a) comprising a circuit board (25), the circuit board (25) comprising a plurality of light sources (16) each emitting a light beam and an optical diffusing element arranged facing said plurality of light sources (16), said main module (14 a) comprising a reflector (21) arranged between said support element (7) and the optical diffusing element, said reflector (21) comprising at least one cavity capable of reflecting at least a portion of the light beam towards the optical diffusing element, each cavity being formed by a back (17) and peripheral walls (18 a, 18b, 18 c) extending from the back (17) towards the optical diffusing element (23), wherein their respective tops are arranged at a first distance (E1).

Inventors

• D. Dubnon

Assignees

• 伊塔瑞士钟表制造股份有限公司

Dates

Publication Date

20260508

Application Date

20251031

Priority Date

20241104

Claims (10)

1. 1. A device (2) for illuminating a precious stone (10), the device comprising a light projector (3) equipped with a main light emitting module (14 a), the main light emitting module (14 a) for generating an illuminance specifically configured to manifest a characteristic of the precious stone (10), the main module (14 a) comprising a circuit board (25), the circuit board (25) comprising a plurality of light sources (16) each emitting a light beam and an optical diffusing element arranged facing the plurality of light sources (16), the main module (14 a) comprising a reflector (21) arranged between a support element (7) and the optical diffusing element, the reflector (21) comprising at least one cavity capable of reflecting at least a portion of the light beam towards the optical diffusing element, each cavity being formed by a back (17) and a peripheral wall (18 a, 18b, 18 c) extending from the back (17) towards the optical diffusing element (23), wherein their respective tops (22 a) are arranged at a first distance (E1) from the optical diffusing element.
2. 2. A device (2) according to the preceding claim, wherein the reflector (21) comprises two cavities capable of reflecting at least a portion of the light beam towards the optical diffusing element, each cavity being formed by the back (17), the peripheral walls (18 a, 18b, 18 c) and a partition wall (19) separating it from the other cavity, the walls extending from the back (17) towards the optical diffusing element (23) and having their respective tops (22 a, 22 b) arranged at a first distance (E1) for the peripheral walls (18 a, 18b, 18 c) and at a second distance (E2) for the partition wall (19) with respect to the optical diffusing element, the first distance (E1) being smaller than the second distance (E2).
3. 3. The device (2) according to any one of the preceding claims, wherein the light source (16) comprises an electroluminescent element.
4. 4. The device (2) according to any one of the preceding claims, wherein the light source (16) has an adjustable color temperature of between 2, 500K and 7,000K, preferably between 5, 700K and 6,300K.
5. 5. Device (2) according to any one of the preceding claims, comprising a module (5) for setting functions implemented by the device (2), which module (5) comprises means (15 a) for controlling these functions and a screen (15 b) for transmitting information related to these functions.
6. 6. The device (2) according to the preceding claim, wherein the function relates to setting the illuminance and temperature of the light source (16).
7. 7. The device (2) according to any one of the preceding claims, comprising an articulated arm (12), the articulated arm (12) comprising a first and a second portion (4 a, 4 b), the first and second portion (4 a, 4 b) being connected at one of their two ends.
8. 8. The apparatus (2) according to the preceding claim, wherein each of the first and second portions (4 a, 4 b) comprises at least one motor for controlling the horizontal and/or vertical movement of the projector (3) with respect to the precious stone (10).
9. 9. The device (2) according to any one of the preceding claims, comprising a secondary module (14 b), the secondary module (14 b) being arranged in a lateral portion of the projector (3) and configured to attenuate light-emitting disturbances that may be caused by a light source external to the device (2).
10. 10. A system (1) for testing characteristics of a precious stone (10), comprising a light emitting device (2) according to any one of the preceding claims and a support element (7) to which the device (2) is fastened, the device (2) being configured to generate illuminance to a zone of interest (8) comprised on a plate (6) on the support element (7), the zone of interest (8) comprising the precious stone (10) that can be manipulated by a user.

Description

System for testing characteristics of precious stones Technical Field The present invention relates to a system for testing characteristics of precious stones, comprising a lighting device specifically adapted to enable visual identification of characteristics of such stones. Background In the state of the art, systems for testing the characteristics of precious stones such as diamonds are often used to verify their authenticity or to sort or otherwise sort such precious stones. For this purpose, these systems generally use lighting devices with fluorescent tubes to visually test their internal or external characteristics, such as their color, purity, size or fluorescence. However, one of the main drawbacks of such systems is that they are not sufficiently safe, as the fluorescent tubes used in these lighting devices comprise substances harmful to the environment and to human health, such as mercury. Furthermore, these fluorescent tubes are known to produce buzzing noise, an acoustic nuisance that can interfere with the attention of the operator responsible for identifying these characteristics. Furthermore, these fluorescent tubes may blink or flash in an imperceptible manner, but may cause headaches, dizziness, and cause problems for operators who are sensitive to light or susceptible to diseases such as epilepsy. Finally, the arrangement of the fluorescent tubes in these systems does not allow the characteristics of the precious stones to be clearly and repeatedly revealed. In view of these circumstances, it is clearly desirable to find an alternative solution that is not harmful. Disclosure of Invention It is therefore an object of the present invention to provide a solution for improving the accuracy in testing properties of precious stones using a system for testing such properties, provided with a lighting device configured to produce an accurate, dynamic and adaptive illuminance (in english: for e clairement) on such stones. To this end, one of the aspects of the invention relates to a device for illuminating precious stones, comprising a light projector equipped with a main light-emitting module for generating an illuminance specifically configured to manifest the characteristics of precious stones, said main module comprising a circuit board comprising a plurality of light sources each emitting a light beam and an optical diffusing element arranged facing said plurality of light sources, said main module (14 a) comprising a reflector arranged between said support element and the optical diffusing element, said reflector comprising at least one cavity capable of reflecting at least a portion of the light beam towards the optical diffusing element, each cavity being formed by a back and a peripheral wall extending from the back towards the optical diffusing element, wherein their respective tops are arranged at a first distance from the optical diffusing element. In other embodiments: -the reflector comprises two cavities capable of reflecting at least a part of the light beam towards the optical diffusing element, each cavity being formed by a back, a peripheral wall and a dividing wall separating it from the other cavity, said walls extending from the back towards the optical diffusing element and having their respective tops arranged at a first distance with respect to the optical diffusing element for the peripheral wall and at a second distance with respect to the dividing wall, the first distance being smaller than the second distance; -the light source comprises an electroluminescent element; the light source has an adjustable color temperature between 2,500K and 7,000K, preferably between 5,700K and 6,300K; the device comprises a module for setting functions implemented by the device, which module comprises means for controlling these functions and a screen for transmitting information related to these functions; -the function involves setting the illuminance and temperature of the light source; The device comprises an articulated arm comprising a first and a second portion connected at one of their two ends; -each of these first and second portions comprises at least one motor for controlling the horizontal and/or vertical movement of the projector with respect to said precious stone; The device comprises a perimeter module arranged in a lateral portion of the projector and configured to attenuate luminous disturbances that may be caused by light sources external to the device. Another of these aspects of the invention relates to a system for testing the characteristics of precious stones, comprising such a lighting device and a support element to which said device is fastened, said device being configured to generate illuminance to a zone of interest on a plate comprised on said support element, said zone of interest 8 comprising said precious stone capable of being manipulated by a user. Drawings The objects, advantages and features of the present invention will become apparent from the f