CN114813739A

CN114813739A - Multifunctional gem tester and gem identification method

Info

Publication number: CN114813739A
Application number: CN202210427519.2A
Authority: CN
Inventors: 朱秀玲; 朱显念
Original assignee: Shenzhen Dikai Industrial Co ltd
Current assignee: Shenzhen Dikai Industrial Co ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-07-29

Abstract

The invention provides a gem tester, which is used for identifying a test object to distinguish the test object as natural diamond, HPTP/CVD synthetic diamond or synthetic Mosang stone, and comprises a portable shell, wherein the portable shell comprises a holding shell; and a test unit, wherein the test unit is housed in the portable housing, wherein the test unit comprises an ultraviolet light emitting unit, wherein the ultraviolet light emitting unit is configured to generate and emit long-wave ultraviolet light and short-wave ultraviolet light; an ultraviolet light receiving unit located at a preset position of the holding housing and configured to sense the long-wave ultraviolet light and the short-wave ultraviolet light emitted by the ultraviolet light emitting unit; an ultraviolet light reflection guide unit positionable between the ultraviolet light receiving unit and a test object; a processing unit accommodated in the holding case of the portable case, communicatively connected to the ultraviolet light receiving unit, and based on a detection condition of the ultraviolet light receiving unit; an output unit operatively connected to the processing unit and arranged to generate a test result of a test object; and a control unit configured to supply and control electric power to the ultraviolet light emitting unit, the ultraviolet light receiving unit, the processing unit, and the output unit.

Description

Multifunctional gem tester and gem identification method

Technical Field

The present invention relates to a gemstone tester, and more particularly, to a multifunctional gemstone tester and gemstone authentication method, the tester including a light unit providing light at conductive probes to determine different qualities of a test object and to distinguish between colorless natural diamonds, and artificial mossamalite and artificial diamonds synthesized by high pressure, high temperature HPHT or chemical vapor deposition CVD techniques.

Background

Gemstone testers are considered one of the convenient tools for the identification of gemstones (e.g., diamond, mohstone and other gemstones). one prior gemstone tester includes a test probe for determining the thermal conductivity of a gemstone such as diamond and the thermal conductivity of mohstone to classify the gemstone according to its physical properties. However, gemstone testers have several disadvantages. The user must be proficient in the relevant skills and techniques to operate the gemstone testing apparatus and have a relatively realistic understanding of the theoretical principles of the gemstone, as the gemstone testing apparatus must adjust or specify its parameters during the testing operation. Inadequate sensitivity of the gemstone tester or improper operation of the gemstone tester can result in testing errors. Furthermore, the gemstone tester can only test one specific gemstone. Accordingly, it can be cumbersome for a user to carry different said gemstone testers to test various gemstones. In addition, the gemstone tester can only identify whether a gemstone is authentic, but the gemstone tester cannot measure the fluorescence of the gemstone through visible light. In other words, the user must carry another tester to measure the fluorescence of the gemstone.

An improved gemstone tester also includes an illumination unit to illuminate the test probe when the test probe is in contact with the gemstone. The illumination unit includes an illumination frame, wherein the illumination frame forms a tip holder to hold the test probe in place. In other words, the test probe extends and is fixed on the illumination frame. Accordingly, the illumination frame provides sufficient illumination at the tip of the test probe to accurately contact the tip of the test probe to the gemstone.

However, the illumination unit not only generates illumination to the illumination frame, but also generates heat to the test probe, since the illumination unit is located in the vicinity of the test probe, and since the test probe is arranged to determine the electrical conductivity of the gemstone, the heat from the illumination unit will affect the accuracy of the electrical conductivity of the test gemstone.

Due to the progress of synthetic diamond production technologies such as synthetic diamond, morusite, HPHT/CVD (high pressure high temperature/chemical vapor deposition), how to detect and distinguish diamond made of natural diamond, synthetic morusite and HPHT/CVD becomes an essential function of a gem detection device.

Disclosure of Invention

An advantage of the present invention is to provide a multi-function gemstone testing apparatus and gemstone authentication method that includes an LED illumination unit to provide illumination to a conductive probe while not substantially conducting heat from the LED illumination unit to the conductive probe when the conductive probe is in contact with a test object.

Another advantage of the present invention is to provide a multifunctional gemstone testing apparatus and a gemstone authentication method that can accurately classify a test object as morusite, diamond, metal or other stone.

Another advantage of the present invention is to provide a multifunctional gemstone testing apparatus and method thereof including an ultraviolet light source for irradiating ultraviolet light to a test object to measure fluorescence of the test object. In particular, the conduction probe and the ultraviolet light source are operated independently of each other.

It is another advantage of the present invention to provide a multi-function gemstone testing apparatus and method of gemstone identification wherein a light-transmissive frame is mounted between the grip housing and the probe housing to diffuse light emitted from the LED lamp to illuminate the testing end of the conductive probe.

Another advantage of the present invention is to provide a multifunctional gemstone testing apparatus and gemstone authentication method, wherein the operation of the present invention is made simple and easy by contacting the thumb and forefinger of the user with the touch control and contacting the testing end of the conductive probe to the test object.

Another advantage of the present invention is to provide a multi-functional gemstone testing apparatus and method of authenticating gemstones in which an LED authentication indicator is formed on a top wall of a portable housing for easy reading.

Another advantage of the present invention is to provide a multi-functional gemstone testing instrument and method of gemstone identification including an ultraviolet light source generating long wavelength ultraviolet light and short wavelength ultraviolet light to detect and distinguish natural diamonds, synthetic morganite and HPHT/CVD diamonds.

It is another advantage of the present invention to provide a multi-functional gemstone testing instrument and method of gemstone identification including a sensor for sensing a pattern of ultraviolet light, wherein the conductive probe and ultraviolet light source are integrated such that an ultraviolet beam is emitted therefrom toward a test object, thereby allowing the sensor to directly or indirectly receive reflections and/or refractions from the test object and generate an ultraviolet light test signal to identify various qualities of the test object, particularly qualities for distinguishing CVD/HPHT synthetic diamonds and for distinguishing colors of that type of diamond.

Another advantage of the present invention is to provide a multi-functional gemstone testing apparatus and method of gemstone authentication that can independently perform various test modes to avoid interference between different test modes that may be operating simultaneously or in an out-of-order manner.

Another advantage of the present invention is to provide a multi-function gemstone testing apparatus and method of evaluating gemstones, including a holding portion removably and/or detachably mounted in a specific location and manner within the gemstone testing apparatus to hold a test object in a specific location and manner to meet various objectives based upon various needs

Another advantage of the present invention is to provide a multifunctional gemstone testing apparatus and method of evaluating gemstones including a cover, a wall and a cavity formed within the cover and the wall, wherein the cover is removably and/or detachably mounted to the wall to selectively open and close the cavity for insertion and removal of a test object and to create and maintain a closed environment during testing to improve the accuracy of the test.

It is another advantage of the present invention to provide a multi-function gemstone testing apparatus and method of gemstone characterization wherein the cover is slidably disposed on the wall portion to enable selective opening and closing of the internal cavity in a compact and elegant manner and to prevent accidental loss or breakage of the cover.

It is another advantage of the present invention to provide a multi-functional gemstone testing instrument and method of gemstone authentication that includes communication circuitry to allow the gemstone testing instrument to communicate with external devices for multiple functions, such as software/firmware updates, evaluation result downloads, historical data downloads, test mode selection, and the like.

Additional advantages and features of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention as set forth hereinafter.

In accordance with the present invention, the above objects and other advantages are achieved by a multi-function gemstone tester, including a portable housing, a testing unit and an indicating unit.

The portable housing includes a grip housing for receiving a power source therein, and a probe housing projecting from a front end of the grip housing.

The test unit includes a gauging circuit housed in a grip housing and electrically connected to a power source, and a conductive probe operatively connected to the gauging circuit, wherein the conductive probe has a testing end extending from a tip of the probe housing to contact a test object to determine thermal and electrical conductivity of the test object.

The indicating unit includes an LED illumination unit housed in the grip housing and operatively connected to the gauging circuitry to produce a light indicating effect to reflect the electrical conductivity of the test object and to distinguish the test object and to illuminate the test end of the conductive probe during testing, wherein the LED illumination unit is located at a portion remote from the tip of the probe housing to prevent heat generated from the LED illumination unit from being transmitted to the conductive probe to affect an accurate measurement of the thermal and/or electrical conductivity of the test object.

According to another aspect of the present invention, the present invention comprises a method of gemstone authentication by means of a multifunctional gemstone testing apparatus including a grip housing and a probe housing extending therefrom, wherein the method comprises the steps of:

(1) the thermal and/or electrical conductivity of the test object is determined by contacting a test end of a conductive probe of a conductive element of the test unit with the test object, wherein the test end of the conductive probe protrudes from the tip of the probe housing.

(2) The testing end of the conductive probe is illuminated by an LED illumination unit located away from the tip of the probe housing to prevent heat generated from the LED illumination unit from being transferred to the conductive probe to affect an accurate measurement of the thermal and/or electrical conductivity of the test object.

(3) One of the plurality of indicator lights is activated to reflect the respective conductivity of the test object, classifying the test object as morusite, diamond, metal, and other stones.

In addition, the present invention also provides a multifunctional gemstone tester, the gemstone tester comprising:

a portable housing including a grip housing, a probe housing coaxially disposed in the grip housing, and a power supply unit housed in the grip housing, wherein the grip housing includes a covering portion, a wall portion, and an inner cavity formed within the covering portion and the wall portion;

a test cell, comprising:

a conductive unit including a conductive probe fixed in the probe housing and a sensor electrically connected to a conductive circuit and disposed inside the wall portion for sensing an ultraviolet light pattern, wherein the conductive probe has a tubular testing end portion protruding from the probe housing into the inner cavity;

an ultraviolet light source adapted to generate an ultraviolet light beam and housed in said portable housing, wherein the ultraviolet light source is assembled in said conductive probe to emit an ultraviolet light beam from said testing end of said conductive probe toward a test object, thereby allowing said sensor to detect ultraviolet light reflected and refracted by the test object and to send an ultraviolet light test signal of a detected ultraviolet light pattern to said conductive circuit; and

a meter circuit housed in the grip housing and electrically connected to the conduction unit and the ultraviolet light source to operate the conduction unit and the ultraviolet light source and to receive an ultraviolet light test signal from the conduction unit to generate an evaluation result of a test object; and

an indicating unit is operatively connected to the evaluation circuit to generate an indicating effect indicative of the test result of the test object.

According to an embodiment of the invention, the conductive probe is operatively connected to the conductive circuit and adapted to contact a test object with the testing tip to determine thermal or electrical conductivity of the test object and send a test signal to the evaluation circuit and analyze the test signal to reflect the electrical/thermal conductivity of the test object, the test object being identified as diamond by thermal conductivity and as morganite by electrical conductivity, wherein the evaluation circuit is further operatively connected to the conductive unit to independently operate the conductive probe and the ultraviolet light source.

According to an embodiment of the present invention, the grip housing further comprises a fixing portion fixed in the inner cavity and adapted to fix the test object at a specific position and manner of the test.

According to an embodiment of the invention, the wall portion has a first groove and a second groove provided on an inner side and an outer side thereof, respectively, wherein the fixing portion protrudes from the first groove and the second groove so as to be movable therefrom.

According to an embodiment of the present invention, the fixing part includes a moving mechanism having a fixing end protruding from the first slot and a control end protruding from the second slot, the fixing part includes a fixing member detachably mounted on the fixing end of the moving mechanism to adaptively fix test objects of various sizes, shapes and styles, wherein the control end protruding from the second slot is adapted to be fixed and moved to move the fixing part along the first slot and the second slot from an outside of the grip housing.

According to an embodiment of the invention, the cover is movably arranged on the wall part so as to selectively open and close the inner cavity, so that a test object can be put in and taken out, and a closed environment can be created and maintained during the test process, so that the test accuracy is improved.

According to an embodiment of the present invention, the test unit further comprises a communication circuit electrically connected to the gauging circuit to allow the gauging circuit to communicate with an external device.

According to an embodiment of the invention, the communication circuit comprises a communication switch arranged outside the wall portion and is electrically connected to the communication circuit for sending signals to the communication circuit.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

Drawings

FIG. 1 is a schematic view of a multi-function gemstone detector according to a preferred embodiment of the invention.

Fig. 2 is a block diagram illustrating the structure of the multifunctional gemstone detector according to the above preferred embodiment of the present invention.

Fig. 3 is a partial sectional view of the multifunctional gemstone tester according to the above preferred embodiment of the invention, showing an LED lamp and a light-transmitting frame for illumination at the holding housing.

Fig. 4 shows a variant implementation of the light-transmitting frame of the multifunctional gemstone tester according to the above preferred embodiment of the invention.

Figure 5 illustrates a first variant implementation of the multifunction gemstone tester in accordance with the above preferred embodiment of the invention.

Fig. 6 illustrates a second variant implementation of the multifunction gemstone tester according to the above preferred embodiment of the invention.

Fig. 7 is a block diagram showing the construction of the multifunctional gemstone tester equipped and configured with a mobile device through a wireless network according to the above preferred embodiment of the present invention.

Fig. 8A and 8B are schematic views of a multifunctional gemstone testing apparatus according to a second embodiment of the invention.

Fig. 9 is a block diagram showing the structure of the multifunctional gemstone tester according to the second preferred embodiment of the invention.

Fig. 10A and 10B are perspective views of a multifunctional gemstone tester according to the above-described variation of the second embodiment of the invention.

Fig. 11 is a block diagram of a gemstone tester according to a third preferred embodiment of the invention.

Fig. 12 is a block circuit diagram of the gemstone tester according to the above-described third preferred embodiment of the invention.

Fig. 13 is a schematic view of a gemstone testing apparatus according to the above third preferred embodiment of the invention.

Fig. 14 is a partial schematic view showing a gemstone testing apparatus according to the third preferred embodiment of the invention described above.

Detailed Description

As shown in fig. 1 and 2, the multi-functional gem tester according to a preferred embodiment of the present invention, in which a test object usable for authentication is one of diamond, moyashi, metal and other stones, includes a portable housing 10, a test unit 20 and an indication unit 30.

The portable housing 10 includes a grip housing 11 for receiving a power supply unit 13 therein and a probe housing 12 extending from a front end of the grip housing 11. Accordingly, the grip housing 11 has a top wall, a bottom wall, two side walls, and an inner cavity formed by the top wall, the bottom wall, and the side walls, wherein the power supply unit 13 is accommodated in the inner cavity of the grip housing 11.

The test unit 20 includes an evaluation circuit 21 housed in the grip housing 11, and a conduction unit 22 operatively connected to the evaluation circuit 21.

The meter circuit 21 is electrically connected to the circuit board as a microprocessor with pre-loaded meter programs, wherein the meter circuit 21 is configured to receive test signals from the conductive elements 22.

Accordingly, the conductive unit 22 includes a conductive circuit 221 electrically connected to the gauging circuit 21 and a conductive probe 222, the conductive probe 222 determining the thermal and/or electrical conductivity of the test object when the conductive probe 222 is in contact with the test object.

The conductive probe 222 has a test end 223 for contacting the test object to determine the thermal and/or electrical conductivity of the test object. Generally, the conductive probe 222 determines the thermal conductivity of a gemstone, such as diamond, and the electrical conductivity of morganite. In other words, a test signal is sent from the conductive probe 222 to the evaluation circuit 21 so that the evaluation circuit 21 analyzes the test signal to reflect the conductivity of the test object, thereby classifying the test object.

The test unit 20 further includes an ultraviolet light source 23 received in the portable housing 10 for generating an ultraviolet light beam toward a test object to determine fluorescence of the test object, wherein the ultraviolet light source 23 has a light sensing head 231 located proximate the testing end 223 of the conductive probe 222 and extending away from the tip of the probe housing 12.

According to a preferred embodiment, the uv light source 23 comprises a uv circuit 232 housed in the grip housing 11 and electrically connected to the evaluation circuit 21, and a uv LED233 adapted to generate uv light, wherein the light sensing head 231 is formed at a head portion protruding from the tip of the probe housing 12 to the uv LED 233.

As shown in fig. 1, the probe housing 12 having a tapered shape has a tip end surface on which a first via 121 and a second via 122 are formed at intervals, wherein the testing end 223 of the conductive probe 222 extends from the tip end of the probe housing 12 through the first opening 121, and the light sensing head 231 of the ultraviolet light source 23 extends from the tip end of the probe housing 12 through the second opening 122, so that the testing end 223 of the conductive probe 222 is located close to the light sensing head 231 of the ultraviolet light source 23.

Further, the protruding length of the testing end 223 of the conductive probe 222 is substantially longer than the protruding length of the photo-sensing head 231 of the ultraviolet light source 23, so that the testing end 223 of the conductive probe 222 not only forms a contact point for measuring the thermal and/or electrical conductivity of a test object, but also forms a fixing point for fixing the photo-sensing head 231 of the ultraviolet light source 23 at a position away from the test object when the testing end 223 of the conductive probe 222 is in contact.

The evaluation circuit 21 includes a selective activation circuit 211, and the selective activation circuit 211 is selectively connected to the conduction unit 22 and the ultraviolet light source 23, so that the conduction probe 222 and the ultraviolet light source 23 can be independently operated.

Accordingly, the test unit 20 further includes a power switch 24 disposed on the grip housing 11 and electrically connected between the power unit 13 and the evaluation circuit 21 to selectively control the evaluation circuit 21 in a switching manner.

The test unit 20 further includes a switch control 25 operatively connected to the selective activation circuit 211 such that the conductive elements 22 can be selectively controlled, wherein when the switch control 25 is activated, the selective activation circuit 211 is activated by the activated switch control 25 to determine the thermal and/or electrical conductivity of the test object when the conductive probes 222 are in contact with the test object.

Accordingly, the switch control 25 includes two touch controls 251 respectively disposed on the side walls of the grip housing 11, wherein the touch controls 251 are activated by a touch of a user. In other words, when a user (right-handed user) holds the grip housing 11, the user's thumb and forefinger will make contact at the touch control 251, respectively, to activate the conductive elements 22 via the selection activation circuit 211. When one of the touch controls 251 is not touched, the selection activation circuit 211 will automatically deactivate the conductive element 22 to stop operation of the conductive element 22.

The test unit 20 further includes an ultraviolet light switch control 26 operatively connected to the selective activation circuit 211 for selectively controlling the ultraviolet light source 23, wherein when the ultraviolet light switch control 26 is activated, the ultraviolet light source 23 is activated by the selective activation circuit 211 to generate ultraviolet light to measure fluorescence of the test object. The ultraviolet light switch control 26 is preferably disposed on the top wall of the grip housing 11 such that when the user activates the ultraviolet light switch control 26, preferably by pressing, the ultraviolet light source 23 is activated to generate ultraviolet light. It is worth mentioning that the conduction unit 22 and the ultraviolet light source 23 may be operated independently or simultaneously.

According to a preferred embodiment, the indicator unit 30 includes an LED illumination unit 31 housed in the grip housing 11 for generating a light indicating effect to reflect the conductivity of the test object to identify the test object and to illuminate the test end 223 of the conductive probe 222 during testing.

According to a preferred embodiment, the LED illumination unit 31 is located away from the tip of the probe housing 12 to prevent heat generated from the LED illumination unit 31 from being transferred to the conductive probe 222, thereby affecting accurate measurement of the electrical conductivity of the test object.

The LED lighting unit 31 comprises a plurality of LED lamps 311 coaxially mounted within the grip housing 11 near the front end, wherein the LED lamps 311 are activated to produce a light effect when the meter circuit 21 is activated. In addition, the evaluation circuit 21 is activated when the conductive probe 222 makes good contact with the test object. Accordingly, the LED light 311 will act as an indicator to ensure that the testing end 223 of the conductive probe 222 is in good contact with the test object, and also as an illuminator to illuminate the testing end 223 of the conductive probe 222 that the test object contacts. However, since the LED lamp 311 is far from the testing end 223 of the conductive probe 222, heat from the LED lamp 311 is not transferred to the conductive probe 222 to ensure accuracy in determining the electrical conductivity of the test object. It is worth mentioning that the LED illumination unit 31 is also located at the photo sensor head 231 away from the uv light source 23 to prevent uv light from interfering with the illumination light.

Preferably, the LED lamp 311 is activated only when the conduction unit 22 is activated. In other words, the LED lamp 311 will be automatically turned off when the ultraviolet light source 23 is activated.

The indicating unit 30 further comprises the light-transmitting frame 32 connected between the grip housing 11 and the probe housing 12, wherein the LED lamp 311 of the LED lighting unit 31 corresponds to the light-transmitting frame 32, so that when the evaluation circuit 21 is activated, the LED lamp 311 of the LED lighting unit 31 generates illumination light to illuminate the light-transmitting frame 32, thereby scattering the light through the LED lamp 311 to illuminate the testing end 223 of the conductive probe 222. In other words, when the conductive probe 222 is in good contact with the test object to activate the evaluation circuit 21, the light-transmissive frame 32 is illuminated by the LED lamp 311 to reflect the good contact between the conductive probe 222 and the test object.

As shown in fig. 1 and 3, the transparent frame 32 surrounds the probe housing 12 to form a circular ring shape, wherein the transparent frame 32 is detachably connected between the grip housing 11 and the probe housing 12. When the LED light 311 is activated to generate light, the light transmissive frame 32 forms a 360 ° illumination light ring to illuminate the testing end 223 of the conductive probe 222. Preferably, the light-transmissive frame 32 is made of a transparent material such as transparent plastic or glass, or a translucent material such as frosted plastic or acrylic.

The light transmissive frame 32 has a rear ring extending from the front end of the grip housing 11 and a front ring extending to the probe housing 12. In other words, the light-transmissive frame 32 forms a neck portion of the portable housing 10 between the grip housing 11 and the probe housing 12. Accordingly, the LED lamp 311 is coaxially fixed on the grip housing 11 to align with the rear ring of the light-transmissive frame 32 such that when the LED lamp 311 is activated to generate light, light will be transmitted from the rear ring to the front ring of the light-transmissive frame 32, thereby illuminating the light-transmissive frame 32.

In addition, the light-transmissive frame 32 also forms a thermally isolated frame between the grip housing 11 and the probe housing 12 to prevent heat from the LED lamp 311 from being transferred to the conductive probe 222.

The LED lamp unit 31 further includes a plurality of LED authentication indicators 312 which are provided at intervals on the top wall of the grip housing 11 for authenticating test objects classified as diamond, morganite, metal, and other stones. Accordingly, the LED discrimination indicator 312 is operatively connected to the meter circuit 21 to display the test results. The LED identification indicators 312 include "diamond" identification indicators, "morganite" identification indicators, "metal" identification indicators, and "other stone" identification indicators, wherein the respective LED identification indicators 312 are activated by the meter circuit 21 to reflect the conductivity of the respective test object.

Preferably, the LED identification indicators 312 are configured to produce different colors. For example, a "diamond" authentication indicator will produce a first color for authenticating the test object. The "morganite" identification indicator will produce a second color to identify the test subject as morganite. The "metal" identifying indicator will produce a third color to identify the test object as metal. The "other stone" discrimination indicator will produce a fourth color to discriminate the test object as other stones. Further, when the test is completed, the LED lights 311 will simultaneously change color to match the corresponding color of the discrimination indicator 312. According to a preferred embodiment, different colors are used to represent different test results, such as blue for diamond, green for mozzarella, amber (orange) for metal, and red for other stones.

The LED lamp unit 31 further includes the LED status indicator 313 provided on the top wall of the grip housing 11 to indicate the status of the evaluation circuit 21. Accordingly, the LED status indicator 313 may be configured to produce different colors to indicate the status of the meter circuit 21. For example, when the power switch 24 is actuated to activate the meter circuit 21, the LED status indicator 313 will produce a red color; and the LED status indicator light 313 will produce an amber color to indicate that the meter circuit 21 is ready for operation; when two fingers are in place, the LED status indicator 313 will produce a green color to turn on the circuit ready for testing. In the operation process, firstly, a user turns on the gem tester, a red waiting lamp is turned on, and meanwhile, the gem tester preheats all four test circuits; the amber light then lights up, informing the user to place the fingers (e.g., thumb and forefinger) on the location of the test plate; finally, if the user has placed his or her finger in position, the green light will light up, informing the user that he or she is now ready to perform the test. If at any time the amber light is re-lit and the green light is extinguished, it will notify the user that there is no good contact between his or her finger and the test board.

According to a preferred embodiment, the power supply unit 13 comprises a battery chamber 131 in the grip housing 11 to receive a battery therein and electrically connected to the evaluation circuit 21, and a battery cover 132 detachably connected at the rear end of the grip housing 11. The battery may be a replaceable battery, and may be replaceably housed in the battery chamber 131. Preferably, the battery is a rechargeable battery housed in the battery compartment 131.

As shown in fig. 1, the indication unit 30 further includes a light indication frame 33 connected between the rear end of the grip housing 11 and the battery cover 132, wherein the LED lamp 311 of the LED illumination unit 31 generates illumination light to illuminate the light indication frame 33 corresponding to the light transmissive frame 32. Therefore, the light-transmitting frame 32 and the light indicating frame 33 are formed at the front and rear ends of the grip housing 11. It is worth mentioning that due to the preference of the buyer, according to a preferred embodiment, it is possible to choose to have only the transparent frame 32 or both the transparent frame 32 and the light indication frame 33, as shown in fig. 1.

Accordingly, the multifunctional gemstone tester further includes a charging device 40 for charging the power supply unit 13, wherein the charging device 40 includes a charging seat 41 electrically connected to the power supply, a first contact terminal 42 disposed on the portable housing 10 and electrically connected to the power supply unit 13, and a second contact terminal 43 disposed on the charging seat 41, and when the portable housing 10 is seated on the charging seat 41, the first contact terminal 42 contacts with the second contact terminal 43 to charge the power supply unit 13.

To operate the gemstone tester for multiple functions, the user may turn on the power switch 24 to preheat the evaluation circuit 21, wherein the LED status indicator light 313 will produce a red color during the preheating time. Once the LED status indicator light 313 produces an amber color, the meter circuit 21 may be ready for operation. The user may hold the grip housing 11 and contact the touch control 251 with a thumb and an index finger, respectively, to activate the conductive element 22. Once the testing end 223 of the conductive probe 222 is in contact with a test object, the LED status indicator 313 will generate a green color to indicate that the touch control 251 is in proper contact and a good contact condition between the testing end 223 of the conductive probe 222 and the test object. The evaluation circuit 21 will then classify the test object according to its conductivity. Accordingly, one of the LED discrimination indicators 312 will be activated by the meter circuit 21 for light indication.

The user can also measure the fluorescence of the test object by means of the uv light source 23. The user can actuate the uv switch control 26 to activate the uv light source 23. It is worth mentioning that the photo sensing head 231 of the uv light source 23 is spaced apart from the test object due to the contact of the test end 223 of the conductive probe 222 with the test object.

Fig. 4 illustrates a variant embodiment of the light-transmissive frame 32 ', wherein the light-transmissive frame 32' is integrally formed in a ring shape at the front end of the grip housing 11 to surround the probe housing 12. The LED lamp 311 of the LED lighting unit 31 is aligned with the light-transmissive frame 32 'such that when the evaluation circuit 21 is activated, the LED lamp 311 of the LED lighting unit 31 generates illumination light, illuminates the light-transmissive frame 32', and spreads out the light of the LED lamp 311 to illuminate the test end 223 of the conductive probe 222.

Fig. 5 illustrates another alternate implementation of the preferred embodiment of the present invention, wherein a magnifying glass 40 may be foldably or slidably mounted on the gemstone tester of the present invention in a predetermined position suitable for a user to view the conductive probe 222 to magnify the conductive probe 222 and the test object. The magnifying lens 40 may further comprise at least one LED 41 to illuminate the area around the magnifying lens 40 during the magnifying test operation.

Fig. 6 shows another variant of the preferred embodiment of the invention, in which a magnifying glass 40' is removably attached near the front end of the grip housing 11. The magnifying lens 40 ' is adapted for sliding movement between a folded position, in which the magnifying lens 40 ' slides rearwardly over an outer surface of the grip housing 11, preferably over the top wall thereof, and an unfolded position, in which the magnifying lens 40 ' slides forwardly towards the conductive probe 22 to magnify the conductive probe 222 and the object to be measured. A lens frame 42 ' with at least one LED illuminator 41 ' is slidably mounted on the top wall of the grip housing 11 to secure the magnifying lens 40 ' in place. The LED illuminator 41 ' of the lens frame 42 ' is electrically connected to the power supply unit 13 through a positioning contact switch, the LED illuminator 41 ' of the lens frame 42 ' is electrically disconnected from the power supply unit 13 when the magnifier 40 ' is moved in the folded position, and the LED illuminator 41 ' of the lens frame 42 is electrically connected to the power supply unit 13 when the magnifier 40 ' is moved in the unfolded position.

It is worth mentioning that the multifunctional gemstone tester according to a preferred embodiment as shown in fig. 7 as shown in fig. 1 to 6 may further include a communication module which is connectable to, but not limited to, the measurement circuit 21, the ultraviolet light circuit 232, the ultraviolet light switch control 26, the LED identification indicator 312, the LED status indicator 313, the power supply unit 13, the conduction probe 222, the thermal switch control 25 and/or the conduction circuit 221, and then is adapted to a mobile device 50, wherein the mobile device 50 includes a screen 51 to display information, such as a mobile phone, a tablet, a notebook, etc., and a user downloads a corresponding APP through a wireless network, Wi-Fi, bluetooth, etc. to show the test result, to classify the test object as diamond, morusite, metal and other stone, and may serve as the indication unit 30, so that the user can view and access the test results from the adapted mobile device anytime and anywhere. Accordingly, it is a variant implementation of the multifunctional gemstone tester of the invention by adapting the APP of the mobile device 50 of the invention such that the mobile device 50 may replace the indication unit 30 of the invention. In other words, the mobile device 50 adapted to the multifunctional gemstone tester may be used as the indication device 30, the indication device 30 is wirelessly connected to the evaluation circuit 21 through a wireless network to generate an indication effect to reflect the electrical conductivity of the test object to identify the test object, and the test end of the conductive probe 222 is illuminated during the test, wherein after the indication unit 30 is configured, when the conductive probe 222 is brought into contact with the test object to activate the evaluation circuit 21, the indication unit 30 generates a test signal to reflect the contact result between the conductive probe 222 and the test object, determines the test object as diamond through the thermal conductivity, and determines the test object as mordenite through the electrical conductivity.

As shown in fig. 8A, 8B and 9, there is shown a multifunctional gemstone tester according to a second preferred embodiment of the invention, which includes a portable housing 10A, a testing unit 20A and an indicating unit 30.

The portable housing 10A includes a grip housing 11A accommodating the power supply unit 13 therein and a probe housing 12A coaxially mounted in the grip housing 11A. The grip housing 11A includes a cover 111A, a wall portion 112A, and an inner cavity 113A formed within the cover 111A and the wall portion 112A, wherein the power supply unit 13 is housed in the inner cavity 113A of the grip housing 11A, and according to the second preferred embodiment, the cover 111A is movably provided on the wall portion 112A so as to selectively open and close the inner cavity 113A to place a test object, i.e., a jewel or jewelry, and create and maintain a closed environment during a test to improve the accuracy of the test. Preferably, the covering portion 111A is slidably provided on the wall portion 112A of the grip housing 11A. As shown in fig. 8A and 8B, in this way, the covering portion 111A can slide along the longitudinal direction of the grip housing 11A to open and close the cavity 113A in a compact and elegant manner. It is to be noted, however, that the cover 111A may also be movably arranged on the wall portion 112A in other ways, such as completely separated from the wall portion 112A and connected back to the wall portion 112A, arranged on the wall portion 112A in a parallel or perpendicular manner, foldably arranged on the wall portion 112A, and so on. It is within the scope of the present invention, and the scope of the present invention is not limited thereto, as long as the covering portion 111A and the wall portion 112A can jointly form and define the cavity 113A and open or close the cavity 113A.

In addition, the grip housing 11A further includes the fixing portion 114A, which can be fixed in the inner cavity 113A and is adapted to receive a test object to perform a test in a designated position and manner in the inner cavity 113A. The specified location and manner is here the one determined by the user as desired, which may depend on the size, shape, style and other qualities of the test object and the purpose and type of the test. For example, a diamond as a test object may be adapted to be fixed at different positions and at different angles so as to check its color and spot at different positions, respectively. Referring to fig. 8A and 8B, according to the second preferred embodiment, the fixing portion 114A is a flexible ring made of rubber or foam material, etc., and its outer shape is matched with the inner wall of the inner cavity 113A, thereby being detachably coupled in the inner cavity 113A by its shape and friction. Also, its elasticity and friction allow test objects of various shapes to be stably embedded therein. However, it is to be noted that the shape, material and mechanism of the fixing portion 114A are not limited herein. For example, the fixing portion 114A may also be a movable jig made of metal, plastic or other materials, a plurality of magnets capable of holding test objects of various shapes and sizes in cooperation with some or all of the magnets, a detachable adhesive capable of temporarily adhering the test objects to predetermined positions of the inner cavity 113A, a bracket allowing only the test objects to be connected thereto in a specific manner, or the like. It is within the scope of the present invention for the retention portion 114A to be able to hold the test object in a certain position within the cavity 113A in a certain manner for testing the test object.

The test unit 20A includes an evaluation circuit 21A housed in the internal cavity 113A of the grip housing 11A, and a conduction unit 22A operatively connected to the evaluation circuit 21A.

The evaluation circuit 21A is a microprocessor electrically connected on a circuit board, wherein the evaluation circuit 21A is arranged to receive and analyze the test signal from the conductive element 22A.

Accordingly, the conduction unit 22A includes a conduction circuit 221A and a conduction probe 222A electrically connected to the evaluation circuit 21A, the conduction circuit 221A determining thermal and/or electrical conductivity when the conduction probe 222A is in contact with a test object.

The conductive probe 222A has a test end 223A extending from the tip of the probe housing 12A to contact a test object to determine the thermal and/or electrical conductivity of the test object. Generally, the conductive probe 222A determines the thermal conductivity of a gemstone, such as diamond, and the electrical conductivity of Moraxel. In other words, a test signal is sent from the conductive probe 222A to the evaluation circuit 21A so that the evaluation circuit 21A will analyze the test signal to reflect the conductivity of the test object in order to classify the test object.

The test unit 20A further comprises an ultraviolet light source 23A arranged to generate an ultraviolet light beam towards the test object for measuring the fluorescence of the test object. The second preferred embodiment differs from the first preferred embodiment described above in that the testing end 223A is tubular and the ultraviolet light source 23A is integrated in the conductive probe 222A so as to emit an ultraviolet light beam from the testing end 223A. In order to avoid that the heat generated by the uv light source 23A affects the accuracy of the tests performed by the conductive probe 222A itself, the latter may need to be performed first, or two tests may need to be performed separately, depending on the actual situation.

According to the second preferred embodiment, the uv light source 23A comprises a uv light circuit 232A housed in the holding housing 11A to be electrically connected with the evaluation circuit 21A and a uv light LED233A configured to generate uv light, wherein the uv light LED233A is embedded in the conductive probe 222A.

In addition, the conduction unit 22A further includes a sensor 224A for sensing the pattern of ultraviolet light reflected and refracted by the test object. The sensor 224A is disposed at a suitable position inside the wall portion 112A and is electrically connected to the conductive circuit 221A so as to send a uv test signal of the detected uv pattern to the conductive circuit 221A and finally to the evaluation circuit 21A for analysis. It is worth mentioning here that the position of the sensor 224A may be aligned with the line between the testing end 223A and the test object, as shown in fig. 8A and 8B, in order to receive more ultraviolet light directly or indirectly refracted through or by the test object for further analysis. However, the sensor 224A may be positioned at other locations near the testing end 223A or around the test object, as shown in fig. 10A and 10B, to receive more of the ultraviolet light reflected by the test object for further analysis. For better detection, it is also possible to provide a larger sensor 224A or at least one of the sensors 224A at different locations as desired. Depending on the location of the sensor 224A, various analysis and calculation procedures may be used to obtain accurate calculation results. The required program is preloaded in the gauging program of the gauging circuit 21A and can also be updated. Accordingly, the number, size and location of the sensors 224A should not be limited in the present invention.

By detecting the test object refracted and/or reflected by the ultraviolet light and analyzing by the evaluation circuit 21A, the multifunctional gemstone tester can identify several properties of the test object, particularly properties for distinguishing the types of colors of CVD/HPHT synthetic diamond and diamond. Finally, all the measurement results produced by the measurement circuit 21A will be sent to the indication unit 30 to be reflected to the user.

Further, as shown in fig. 9, the test unit 20A further includes the communication circuit 27 electrically connected to the evaluation circuit 21A so as to allow the evaluation circuit 21A to communicate with external devices, such as software/company software update, evaluation result download, history data download, test mode selection, and the like. The communication circuit 27 includes the communication switch 271, and the communication switch 271 is disposed outside the wall portion 112A of the grip case 11A of the portable housing 10A and is electrically connected to the communication circuit 27 so as to send a signal to the communication circuit 27 for various instructions and manual operations of the communication circuit 27, such as on/off, pairing, mode switching, and the like. According to the second preferred embodiment, the communication circuit 27 may be a bluetooth module, and the communication switch 271 may be a bluetooth switch and a connection button with an indicator. However, according to other embodiments, the communication circuit 27 may be embodied as various wired and/or wireless communication modules, such as a USB interface module, a WiFi module, a bluetooth module, an NFC module, and the like. For example, it may be an integrated circuit USB interface module and WiFi module. Accordingly, the present invention is not limited to the actual implementation of the communication switch 271.

Further, reference is made to the previous implementation and knowledge of the person skilled in the art as to the detailed structure and mechanism not specified in relation to the second preferred embodiment.

As shown in fig. 10A and 10B, there is shown a multifunctional gemstone tester according to the above-described second preferred embodiment of the present invention, which includes the portable housing 10B, the test unit 20B, and the indication unit 30.

Likewise, the portable housing 10B includes a grip housing 11B for housing the power supply unit 13, and a probe housing 12B provided in the grip housing 11B. The grip housing 11B includes a covering portion 111B, a wall portion 112B, and an inner cavity 113B formed inside the covering portion 111B and the wall portion 112B, wherein the power supply unit 13 is housed in the inner cavity 113B of the grip housing 11B. The cover 111B is movably disposed on the cavity 113B to open and close the cavity 113B for a user to insert and remove a gemstone and to create and maintain a closed environment during testing to improve the accuracy of the test. Alternatively, the grip housing 11B further includes a fixing portion 114B movably disposed on the wall portion 112B for fixing the test object. The wall portion 112B has a first groove 1121B and a second groove 1122B provided inside and outside the wall portion, respectively, so as to protrude from the fixing portion 114B, respectively, thereby moving the fixing portion 114B along the first groove 1121B and the second groove 1122B. The fixing portion 114B includes a moving mechanism 1141B having a fixing end 114111B protruding from the first groove 1121B and a control end 11412B protruding from the second groove 1122B, and a fixing member 1142B detachably mounted at the fixing end 11411B of the moving mechanism 1141B so as to be replaced to accommodate fixing test objects of various sizes, shapes and patterns. The control end 11412B protruding from the second slot 1122B is adapted to be secured and moved by a user to move the securing portion 112B along the first and

second slots

1121B, 1122B, particularly when the inner cavity 113B is closed. However, when the inner cavity 113B is opened, the fixing portion 114B may be moved by fixing and moving the fixing end 11411B protruding from the first groove 1121B. The securing member 1142B is replaceable and may be implemented in various sizes, shapes, and forms. According to this variant implementation, the fixing member 1142B may be a rubber cylinder matching most of the medium-sized rings, but other sizes may be used for the different sized rings. However, it is worth mentioning that the shape, material and mechanism of the fixing member 1142B are not limited. For example, the fixing member 1142B may also be embodied as a plane made of EVA and plastic or other materials, a clamp made of metal, plastic or other materials, a plurality of magnets capable of holding test objects of various shapes and sizes together with part or all of the magnets, a detachable adhesive capable of temporarily adhering the test objects to a predetermined position of the inner cavity 113B, a bracket allowing only the test objects to be connected thereto in a specific manner, and the like. It is within the scope of the present invention for the securing member 1142B to be able to secure the test object at the fixed end 11411B of the lumen 113B in some manner.

Referring to fig. 11 to 12, there is shown the gemstone tester according to a third preferred embodiment of the invention. The third preferred embodiment is different from the above-described first and second embodiments in that a test unit 20C, which further includes an ultraviolet light emitting unit 201C, an ultraviolet light reflection guide unit 202C, an ultraviolet light receiving unit 203C, a processing unit 204C, an input unit 205C, an output unit 206C, and a control unit 207C, is enclosed in a

grip housing

11, 11A, 11B, 11C of a

portable housing

10, 10A, 10B, 10C.

The ultraviolet light emitting unit 201C is configured to generate and emit long-wavelength ultraviolet light and short-wavelength ultraviolet light. The ultraviolet light reflection guide unit 202C is configured to reflect and guide long-wavelength ultraviolet light and short-wavelength ultraviolet light. The ultraviolet light receiving unit 203C is configured to receive the sensing reflected long wave ultraviolet light and the reflected short wave ultraviolet light. The processing unit 204C is housed in the grip housing 11C of the portable housing 1OC and is electrically and communicatively connected to the ultraviolet light receiving unit 203C, and is configured to convert the received long-wavelength ultraviolet light and short-wavelength ultraviolet light into detection signals and process the detection signals at least by the processor 2041C, the transimpedance amplifier 2042C, and the operational amplifier 2043C. The input unit 205C is at least configured to turn the gemstone tester on or off, drive the testing function, and sense three-dimensional detection. The output unit 206C is operatively connected to the processing unit 204C and is arranged to generate and display visual and audio signals of the test result of the test subject, wherein the analyzed and displayed type of diamond is presented via the display screen and at least the speaker depending on the intensity of the detection signal. The control unit 207C is arranged to supply power to the ultraviolet light emitting unit 201C, the ultraviolet light receiving unit 203C, the processing unit 204C, the input unit 205C and the output unit 206C, and is adapted for input of power control and control signals such as USB-C input and other inputs.

Colorless natural diamond can absorb short wavelength ultraviolet light (radiation) at 265nm, while synthetic HPHT/CVD synthetic diamond can reflect short wavelength ultraviolet light. Whereas colorless natural diamond is capable of reflecting long-wavelength ultraviolet light having a wavelength of 365nm, synthetic morganite absorbs both long-wavelength ultraviolet light and short-wavelength ultraviolet light.

As shown in fig. 12, the ultraviolet light emitting unit 201C of the test unit 20C includes a long-wave ultraviolet emitter 2011C configured to emit long-wave ultraviolet light having a wavelength of 285nm to 400nm, preferably 365nm, and a short-wave ultraviolet emitter 2012C configured to emit short-wave ultraviolet light having a wavelength of 10nm to 280nm, preferably 265 nm. Each of the long wave uv light emitters 2011C and the short wave uv light emitters 2012C is embodied as a uv LED.

Referring to the third preferred embodiment of the present invention, the portable housing 10C further includes a probe housing 12C connected to the grip housing 11C, an ultraviolet light emitting unit 201C. The ultraviolet light emitting unit 201C is disposed at the position of the detection housing 12C, and allows the long wave ultraviolet light emitter 2011C and the short wave ultraviolet light emitter 2012C to emit long wave ultraviolet light and short wave ultraviolet light to the test object, respectively.

As shown in fig. 13, the portable case 10C of the third preferred embodiment illustrates an external appearance thereof, wherein the portable case 10C further includes a case 13C adapted to cover the probe case 12C when not in use.

The ultraviolet light reflection guide unit 202C is disposed between the ultraviolet light receiving unit 203 and the test object so that the long and short wavelength ultraviolet light emitted from the ultraviolet light long wave emitter 2011C and the ultraviolet light short wave emitter 2012C and reflected by the test object can be guided and refracted by the ultraviolet light reflection guide unit 202C to be received by the ultraviolet light receiving unit 203C.

The ultraviolet light receiving unit 203C includes a long wave short wave ultraviolet light sensor 2031C mounted on the data sensor 20311C for receiving the long wave ultraviolet light and the short wave ultraviolet light reflected and refracted by the test object. The long wave short wave ultraviolet light sensor 2031C is disposed at a preset position of the grip housing 11C of the portable housing 10C according to the third preferred embodiment of the present invention, for example, at the outside of the wall portion 112C of the grip housing 11C, and is electrically connected to the processing unit 204C so as to transmit an ultraviolet light test signal of the detected ultraviolet light pattern to the processing unit 204C for analysis. It is worth mentioning that the long wave and short wave uv light sensor 2031C is preferably positioned in coaxial alignment with the inner end of the uv light reflection guide unit 202C such that long wave uv light and/or short wave uv light emitted from the long wave uv light emitter 2011C and the short wave uv light emitter 2012C and projected around the outer end of the uv light reflection guide unit 202C can be reflected by the test object as it comes into contact with the uv light reflection guide unit 202C and guided and refracted to the uv light receiving unit 203C.

When the test unit 20C of the preferred third embodiment is provided in the second embodiment, the long wave short wave uv light sensor 2031C replaces the sensor 224A and is positioned at a suitable location on the inside of the wall portion 112A, wherein the long wave short wave uv light sensor 2031C may be positioned in alignment with a line between the test end 223A and the test object, as shown in fig. 8A and 8B, so as to receive more uv light that passes through or is refracted directly or indirectly by the test object for further analysis. However, the long wave short wave ultraviolet light sensor 2031A may also be located near the testing end 223A or at other locations around the test object, as shown. 10A and 10B to receive more of the uv light reflected by the test object for further analysis.

For better detection, it may also be possible to provide a larger size of the long wave short wave ultraviolet light sensor 2031C or more than one of the long wave short wave ultraviolet light sensors 2031C at multiple locations, as desired. Depending on the location of the long wave short wave ultraviolet light sensor 2031C, accurate results may be obtained by using various analysis and calculation procedures. The required program is pre-installed in the measurement program of the processor 2041A and may also be updated. Accordingly, the number, size and location of the long wave short wave uv sensors 2031C should not be limited by the present invention.

By detecting the long and/or short wavelength uv light reflected by the test object and analyzed by the processing unit 204C, the gemstone tester can distinguish between natural diamond, HPHT/CVD synthetic diamond, and synthetic morganite, and can identify the quality and color of the diamond type. Finally, all the measurements generated by the processing unit 204C will be sent to the output unit 206C to be displayed to the user.

The output unit 206C includes a visual display screen 2061C driven by a display driver 20611C displaying a visual signal and an audio element 2062C such as a speaker for displaying an audio signal. The output unit 206C is electrically connected to the processing unit 204C to enable the processing unit 204C to communicate with various external devices, such as software/software updates, measurement result downloads, history data downloads, test mode selection, and the like. The input unit 205C includes a start-stop switch 2051C, a test switch 2052C, Type-CUSB2053C, a 3D sensor 2054C, and a touch screen 2055C driven by a touch driver 20551C, which are provided outside the wall portion 112A of the grip housing 11A of the portable housing 10A, and are electrically connected to the processing unit 204C. The start stop switch 2051C is provided for turning the gemstone tester on or off. The test switch 2052C is configured to drive the ultraviolet light emitting unit 201C to emit ultraviolet light, and the processing unit 204C processes the received light signal for analysis and detection, and sends a signal to the output unit 206C to perform various instructions and manual operations, such as on/off, segmentation, and mode switching. The Type-CUSB2053C is configured to communicate with external devices, such as download and update programs, to the processor 2041C and electrically connect an external power source to charge the rechargeable power source 2071C in the grip housing 11C. The 3D sensor 2054C is configured to detect the presence and location of a test object. The touch screen 2055C driven by the touch driver 20551C is provided so as to be able to input information by a user.

The control unit 207C includes a rechargeable power supply 2071C for supplying power, and a dc control unit 2072C for controlling a power supply voltage, a boost voltage, a regulated voltage, and a control signal input through the Type-CUSB 2053C.

As shown in fig. 14, the probe housing 12C is a hollow circular body extending from the grip housing 11C, and the tip of the probe housing 12C has a tip opening 121C and an inner hollow space 122C between the grip housing 11C and the tip opening 121C. The ultraviolet light receiving unit 203C is mounted on the bottom of the probe housing 12C and is disposed coaxially facing the tip opening 121C. The uv light emitting unit 201C further includes a ring-shaped base 2013C which is disposed at an inward inclination at the tip of the grip housing 12C and surrounds the tip opening 121C, wherein a long wave uv light emitter 2011C and a short wave uv light emitter 2012C are oppositely installed at the base 2013C. The ultraviolet light reflection guide unit 202C includes an elongated ultraviolet light reflection guide 2021C made of a hardened high-density glass material and a hiding tube 2022C made of a metal material and coaxially extending along a length direction of the ultraviolet light reflection guide unit 202C to hide the ultraviolet light reflection guide 2021C therein. The ultraviolet light reflection guide unit 202C extends from the long wave and short wave ultraviolet light sensor 2031C coaxially with the probe housing 12C to pass through the tip opening 121C by a predetermined length, forming a testing tip 2023C such that the long wave and short wave ultraviolet light emitted from the long wave ultraviolet light emitter 2011C and the short wave ultraviolet light emitter 2012C are directed to a testing area around the testing tip 2023C, so that when the testing tip 2023C is brought into contact with a test object, such as a diamond D as shown in fig. 14, the long wave and short wave ultraviolet light are projected around the area of the test object contacted by the testing tip 2023C. Accordingly, if the test object reflects any ultraviolet light (long-wave ultraviolet light and/or short-wave ultraviolet light), the reflected ultraviolet light is projected into the ultraviolet light reflection guide 2021C through the test tip 2023C, wherein the reflected ultraviolet light from the test object is guided and refracted through the other end of the ultraviolet light reflection guide 2021C due to the hidden tube 2022C and is received by the long-wave short-wave ultraviolet light sensor 2031C of the ultraviolet light receiving unit 203C.

Accordingly, if the test object is the natural diamond, the test object absorbs the short wave ultraviolet light emitted from the short wave ultraviolet light emitter 2012C and reflects the long wave ultraviolet light emitted from the long wave ultraviolet light emitter 2011C to the ultraviolet light reflection guide unit 202C, wherein the long wave ultraviolet light reflected by the test object is guided and refracted by the ultraviolet light reflection guide unit 202C to the ultraviolet light receiving unit 203C, so that the long wave short wave ultraviolet light sensor 2031C detects only the reflected long wave ultraviolet light, and the 365nm long wave ultraviolet light and the 265nm short wave ultraviolet light are simultaneously emitted and projected to the test object. Then, the reflected and refracted long-wave ultraviolet light is amplified by the transimpedance amplifier 2042C and the operational amplifier 2043C and analyzed by the processor 2041C to determine that the test object is a natural diamond.

If the test object is HPHT/CVD synthetic diamond, the test object reflects the short wave ultraviolet light emitted from the short wave ultraviolet light emitter 2012C and the long wave ultraviolet light emitted from the long wave ultraviolet light emitter 2011C to the ultraviolet light reflection guide unit 202C, wherein the reflected and refracted long wave and short wave ultraviolet light are guided and refracted by the ultraviolet light reflection guide unit 2020C to the long wave short wave ultraviolet light sensor 2031C of the ultraviolet light receiving unit 203C, wherein the long wave short wave ultraviolet light sensor 2031C can detect the long wave and short wave ultraviolet light. In other words, 365nm long-wave ultraviolet light and 265nm short-wave ultraviolet light are simultaneously emitted and projected onto the test object. The reflected long and short wavelength uv light is then amplified by the transimpedance amplifier 2042C and the operational amplifier 2043C and analyzed by the processor 2041C to determine that the test object is an HPHT/CVD diamond.

If the test object is synthetic morganite, both the short wave uv light emitted from the short wave uv emitter 2012C and the long wave uv light emitted from the long wave uv emitter 2011C are absorbed by the test object, and the long wave short wave uv sensor 2031C does not detect the reflected long wave or short wave uv light, while the 365nm long wave uv light and the 265nm short wave uv light are simultaneously emitted and projected to the test object, so the processor 2041C can determine that the test object is synthetic morganite.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A gemstone tester for identifying a test object to distinguish the test object as natural diamond, HPHT/CVD synthetic diamond, and synthetic morganite, comprising:

a portable housing, wherein the portable housing comprises a grip housing; and

a test unit, wherein the test unit is housed in the portable housing, comprising:

an ultraviolet light emitting unit, wherein the ultraviolet light emitting unit is configured to generate and emit long-wave ultraviolet light having a wavelength of 285nm to 400nm and short-wave ultraviolet light having a wavelength of 10nm to 280 nm;

an ultraviolet light receiving unit which is positioned at a preset position of the holding shell and is arranged to receive long-wave ultraviolet light and short-wave ultraviolet light, wherein the long-wave ultraviolet light and the short-wave ultraviolet light are emitted by the ultraviolet light emitting unit;

an ultraviolet light reflection guide unit provided to be positionable between the ultraviolet light receiving unit and the test object in:

if the test object is natural diamond, the short wavelength ultraviolet light emitted from the ultraviolet light emitting unit is absorbed by the test object, and the long wavelength ultraviolet light emitted from the ultraviolet light emitting unit is reflected to the ultraviolet light reflection guide unit by the test object, wherein the long wavelength ultraviolet light reflected by the test object is guided and refracted by the ultraviolet light reflection guide unit to the ultraviolet light receiving unit, wherein the ultraviolet light receiving unit detects only the long wavelength ultraviolet light;

if the test object is HPHT/CVD synthetic diamond, both short-wave ultraviolet light and long-wave ultraviolet light emitted from the ultraviolet light emitting unit are reflected by the test object to the ultraviolet light reflection guide unit, wherein long-wave ultraviolet light reflected by the test object is guided by the ultraviolet light reflection guide unit to be refracted to the ultraviolet light receiving unit, and the long-wave ultraviolet light and the short-wave ultraviolet light are detected by the ultraviolet light receiving unit;

if the test object is the synthetic morganite, the short-wave ultraviolet light and the long-wave ultraviolet light emitted by the ultraviolet light emitting unit are absorbed by the test object, and the ultraviolet light receiving unit cannot detect the reflected ultraviolet light;

a processing unit housed in the grip housing of the portable housing, communicatively connected to the ultraviolet light receiving unit, and processing a signal transmitted from the ultraviolet light receiving unit according to a detection condition of the ultraviolet light receiving unit, wherein the detection condition may be that no ultraviolet light is received, that long-wavelength and short-wavelength ultraviolet light is received, or that only long-wavelength ultraviolet light is received;

an output unit operatively connected to the processing unit and arranged to generate a test result of a test object; and

a control unit configured to supply and control power to the ultraviolet light emitting unit, the ultraviolet light receiving unit, the processing unit, and the output unit.

2. The gemstone tester of claim 1, wherein the ultraviolet light emitting unit includes a long wave ultraviolet light emitter configured to generate and emit long wave ultraviolet light toward the test object, and a short wave ultraviolet light emitter configured to generate and emit short wave ultraviolet light toward the test object.

3. The gemstone tester of claim 1, wherein the ultraviolet light emitting unit is configured to emit long wavelength ultraviolet light having a wavelength of 365nm and short wavelength ultraviolet light having a wavelength of 265 nm.

4. The gemstone tester of claim 2, wherein the long wave ultraviolet light emitter is configured to generate and emit long wave ultraviolet light having a wavelength of 365nm, the short wave ultraviolet light emitter being configured to generate and emit short wave ultraviolet light having a wavelength of 265 nm.

5. The gemstone tester of claim 1, wherein the ultraviolet light reflection guide unit includes an elongated ultraviolet light reflection guide body made of a hardened high-density glass material and a hidden tube made of a metal material and extending coaxially along a length direction of the ultraviolet light reflection guide unit, wherein the ultraviolet light reflection guide unit extends from the ultraviolet light receiving unit to a preset length to form a test tip contacting a test object, wherein the ultraviolet light emitting unit is disposed to emit long-wavelength ultraviolet light and short-wavelength ultraviolet light toward the testing tip of the ultraviolet light reflection guide unit, such that one or both of the long wavelength ultraviolet light and the short wavelength ultraviolet light emitted toward the test object are reflected by the test object to the testing tip and refracted along the ultraviolet light reflection guide to the first end and received by the ultraviolet light receiving unit.

6. The gemstone tester of claim 2, wherein the ultraviolet light reflection guide unit includes an elongated ultraviolet light reflection guide body made of a hardened high-density glass material and a hidden tube made of a metal material and coaxially extending along a length direction of the ultraviolet light reflection guide unit, wherein the ultraviolet light reflection guide unit extends from the ultraviolet light receiving unit to a preset length to form a test tip contacting a test object, wherein the long-wavelength ultraviolet light emitter and the short-wavelength ultraviolet light emitter of the ultraviolet light emitting unit are disposed to allow the long-wavelength ultraviolet light emitted by the long-wavelength ultraviolet light emitter and the short-wavelength ultraviolet light emitted by the short-wavelength ultraviolet light emitter of the ultraviolet light emitting unit to be emitted toward the test tip of the ultraviolet light reflection guide unit, so that one or both of the long-wavelength ultraviolet light and the short-wavelength ultraviolet light emitted toward the test object are reflected by the test object to the emitted toward the test tip together The test tip is refracted to the first end along the ultraviolet light reflection guide body and received by the ultraviolet light receiving unit.

7. The gemstone tester of claim 3, wherein the ultraviolet light reflection guiding unit includes an elongated ultraviolet light reflection guide made of a hardened high-density glass material and a hidden tube made of a metal material and coaxially extending along a length direction of the ultraviolet light reflection guiding unit, wherein the ultraviolet light reflection guiding unit extends from the ultraviolet light receiving unit to a preset length to form a test tip contacting a test object, wherein the long-wavelength ultraviolet light emitter and the short-wavelength ultraviolet light emitter of the ultraviolet light emitting unit are disposed to allow the long-wavelength ultraviolet light emitted by the long-wavelength ultraviolet light emitter and the short-wavelength ultraviolet light emitted by the short-wavelength ultraviolet light emitter of the ultraviolet light emitting unit to be emitted toward the test tip of the ultraviolet light reflection guiding unit, so that one or both of the long-wavelength ultraviolet light and the short-wavelength ultraviolet light emitted toward the test object are reflected by the test object to the emitted toward the test tip together The test tip is refracted to the first end along the ultraviolet light reflection guide body and received by the ultraviolet light receiving unit.

8. The gemstone tester of claim 4, wherein the ultraviolet light reflection guide unit includes an elongated ultraviolet light reflection guide body made of a hardened high-density glass material and a hidden tube made of a metal material and coaxially extending along a length direction of the ultraviolet light reflection guide unit, wherein the ultraviolet light reflection guide unit extends from the ultraviolet light receiving unit to a preset length to form a test tip contacting a test object, wherein the long-wavelength ultraviolet light emitter and the short-wavelength ultraviolet light emitter of the ultraviolet light emitting unit are disposed to allow the long-wavelength ultraviolet light emitted by the long-wavelength ultraviolet light emitter and the short-wavelength ultraviolet light emitted by the short-wavelength ultraviolet light emitter of the ultraviolet light emitting unit to be emitted toward the test tip of the ultraviolet light reflection guide unit, so that one or both of the long-wavelength ultraviolet light and the short-wavelength ultraviolet light emitted toward the test object are reflected by the test object to the emitted toward the test tip together The test tip is refracted to the first end along the ultraviolet light reflection guide body and received by the ultraviolet light receiving unit.

9. The gemstone tester of claim 1, wherein the ultraviolet light receiving unit includes a long wave short wave ultraviolet light sensor mounted on the holding housing, the long wave short wave ultraviolet light sensor being configured to sense the long wave ultraviolet light and the short wave ultraviolet light directed and refracted by the ultraviolet light reflection directing unit.

10. The gemstone tester of claim 2, wherein the ultraviolet light receiving unit includes a long wave short wave ultraviolet light sensor mounted on the holding housing, the long wave short wave ultraviolet light sensor being configured to sense long wave ultraviolet light and short wave ultraviolet light emitted from the long wave ultraviolet light emitter and the short wave ultraviolet light emitter and reflected from a test object and guided and refracted by the ultraviolet light reflection guiding unit.

11. The gemstone tester of claim 3, wherein the ultraviolet light receiving unit includes a long wave short wave ultraviolet light sensor mounted on the holding housing, the long wave short wave ultraviolet light sensor being configured to sense long wave ultraviolet light and short wave ultraviolet light emitted from the long wave ultraviolet light emitter and the short wave ultraviolet light emitter and reflected from a test object and guided and refracted by the ultraviolet light reflection guiding unit.

12. The gemstone tester of claim 4, wherein the ultraviolet light receiving unit includes a long wave short wave ultraviolet light sensor mounted on the holding housing, the long wave short wave ultraviolet light sensor being configured to sense long wave ultraviolet light and short wave ultraviolet light emitted from the long wave ultraviolet light emitter and the short wave ultraviolet light emitter and reflected from a test object and guided and refracted by the ultraviolet light reflection guiding unit.

13. The gemstone tester of claim 5, wherein the ultraviolet light receiving unit includes a long wave short wave ultraviolet light sensor mounted on the holding housing, the long wave short wave ultraviolet light sensor being configured to sense long wave ultraviolet light and short wave ultraviolet light reflected from a test object and directed and refracted by the ultraviolet light reflective guide of the ultraviolet light reflective guide unit.

14. The gemstone tester of claim 6, wherein the ultraviolet light receiving unit includes a long wave short wave ultraviolet light sensor mounted on the holding housing, the long wave short wave ultraviolet light sensor being disposed to sense long wave ultraviolet light and short wave ultraviolet light reflected from a test object and guided and refracted by the ultraviolet light reflecting guide of the ultraviolet light reflecting guide unit.

15. The gemstone tester of claim 7, wherein the ultraviolet light receiving unit includes a long wave short wave ultraviolet light sensor mounted on the holding housing, the long wave short wave ultraviolet light sensor being disposed to sense long wave ultraviolet light and short wave ultraviolet light reflected from a test object and guided and refracted by the ultraviolet light reflecting guide of the ultraviolet light reflecting guide unit.

16. The gemstone tester of claim 8, wherein the ultraviolet light receiving unit includes a long wave short wave ultraviolet light sensor mounted on the holding housing, the long wave short wave ultraviolet light sensor being configured to sense long wave ultraviolet light and short wave ultraviolet light reflected from a test object and directed and refracted by the ultraviolet light reflective guide of the ultraviolet light reflective guide unit.

17. The gemstone tester of claim 6, wherein the portable housing further includes a probe housing, the probe housing being a hollow body extending from the grip housing, the probe housing having a tip opening at a tip end thereof, the probe housing having an interior chamber between the grip housing and the tip opening, wherein the ultraviolet light receiving unit is mounted at a bottom of the probe housing and coaxially disposed toward the tip opening, the ultraviolet light emitting unit further includes an annular base portion disposed obliquely inwardly of the tip end of the grip housing and surrounding the tip opening, wherein the long wavelength ultraviolet light emitter and the short wavelength ultraviolet light emitter are oppositely mounted on the base portion, wherein the ultraviolet light reflection guide extends from the ultraviolet light receiving unit coaxially with the probe housing, forming the testing tip through the tip opening such that the long wave ultraviolet light emitted from the long wave ultraviolet light emitter and the short wave ultraviolet light emitted from the short wave ultraviolet light are directed toward a testing area around the testing tip.

18. The gemstone tester of claim 7, wherein the portable housing further includes a probe housing, the probe housing being a hollow body extending from the grip housing, the probe housing having a tip opening at a tip end thereof, the probe housing having an interior chamber between the grip housing and the tip opening, wherein the ultraviolet light receiving unit is mounted at a bottom of the probe housing and coaxially disposed toward the tip opening, the ultraviolet light emitting unit further includes an annular base portion disposed obliquely inwardly of the tip end of the grip housing and surrounding the tip opening, wherein the long wavelength ultraviolet light emitter and the short wavelength ultraviolet light emitter are oppositely mounted on the base portion, wherein the ultraviolet light reflection guide extends from the ultraviolet light receiving unit coaxially with the probe housing, forming the testing tip through the tip opening such that the long wave ultraviolet light emitted from the long wave ultraviolet light emitter and the short wave ultraviolet light emitted from the short wave ultraviolet light are directed toward a testing area around the testing tip.

19. The gemstone tester of claim 8, wherein the portable housing further includes a probe housing, the probe housing being a hollow body extending from the grip housing, the probe housing having a tip opening at a tip end thereof, the probe housing having an interior chamber between the grip housing and the tip opening, wherein the ultraviolet light receiving unit is mounted at a bottom of the probe housing and coaxially disposed toward the tip opening, the ultraviolet light emitting unit further includes an annular base portion disposed obliquely inwardly of the tip end of the grip housing and surrounding the tip opening, wherein the long wavelength ultraviolet light emitter and the short wavelength ultraviolet light emitter are oppositely mounted on the base portion, wherein the ultraviolet light reflection guide extends from the ultraviolet light receiving unit coaxially with the probe housing, forming the testing tip through the tip opening such that the long wave ultraviolet light emitted from the long wave ultraviolet light emitter and the short wave ultraviolet light emitted from the short wave ultraviolet light are directed toward a testing area around the testing tip.

20. The gemstone tester of claim 16, wherein the portable housing further includes a probe housing, the probe housing being a hollow body extending from the grip housing, the probe housing having a tip opening at a tip end thereof, the probe housing having an interior chamber between the grip housing and the tip opening, wherein the ultraviolet light receiving unit is mounted at a bottom of the probe housing and coaxially disposed toward the tip opening, the ultraviolet light emitting unit further includes an annular base portion disposed obliquely inwardly of the tip end of the grip housing and surrounding the tip opening, wherein the long wavelength ultraviolet light emitter and the short wavelength ultraviolet light emitter are oppositely mounted on the base portion, wherein the ultraviolet light reflection guide extends from the ultraviolet light receiving unit coaxially with the probe housing, forming the testing tip through the tip opening such that the long wave ultraviolet light emitted from the long wave ultraviolet light emitter and the short wave ultraviolet light emitted from the short wave ultraviolet light are directed toward a testing area around the testing tip.