US 12,130,238 B2
Multi-functional precious stone testing apparatus and method thereof
Xiuling Zhu, Shenzhen (CN); and Gary Bruce Peckham, Shenzhen (CN)
Assigned to Shenzhen Dikai Industrial Co., Ltd., Shenzhen (CN)
Filed by Shenzhen Dikai Industrial Co., Ltd., Shenzhen (CN)
Filed on Dec. 27, 2021, as Appl. No. 17/562,734.
Application 17/562,734 is a continuation in part of application No. 16/708,461, filed on Dec. 10, 2019, granted, now 11,243,170.
Application 16/708,461 is a continuation in part of application No. 16/231,343, filed on Dec. 21, 2018, granted, now 10,539,510, issued on Jan. 21, 2020.
Application 16/231,343 is a continuation of application No. 15/241,024, filed on Aug. 18, 2016, granted, now 10,203,317, issued on Feb. 12, 2019.
Application 15/241,024 is a continuation of application No. 14/564,041, filed on Dec. 8, 2014, granted, now 9,453,808, issued on Sep. 27, 2016.
Application 14/564,041 is a continuation in part of application No. 12/932,109, filed on Feb. 16, 2011, granted, now 8,947,111, issued on Feb. 3, 2015.
Prior Publication US 2022/0120695 A1, Apr. 21, 2022
Int. Cl. G01N 21/25 (2006.01); G01N 21/33 (2006.01); G01N 21/35 (2014.01); G01N 21/63 (2006.01); G01N 21/87 (2006.01); G01N 21/88 (2006.01); G01N 25/18 (2006.01); G01N 27/02 (2006.01); G01N 27/04 (2006.01); G01N 33/00 (2006.01)
CPC G01N 21/87 (2013.01) [G01N 21/25 (2013.01); G01N 21/33 (2013.01); G01N 21/35 (2013.01); G01N 21/63 (2013.01); G01N 21/8803 (2013.01); G01N 25/18 (2013.01); G01N 27/02 (2013.01); G01N 27/041 (2013.01); G01N 33/389 (2024.05)] 20 Claims
OG exemplary drawing
 
1. A precious stone testing apparatus for testing a test object to distinguish whether the test object is a natural diamond, a synthetic HPTP/CVD diamond or a synthetic moissanite diamond, comprising:
a portable housing comprising a hand-held casing; and
a testing unit contained in said portable housing, which comprises:
a UV light emission unit configured to produce and emit a long-wave UV light having a wavelength ranged 315 nm to 400 nm and a short-wave UV light having a wavelength ranged 10 nm to 280 nm towards the test object;
a UV light receiving unit positioned at a predetermined positioned of said hand-held casing and configured for sensing the long-wave UV light and the short-wave UV light emitted by said UV light emission unit;
a UV light reflection and guiding unit configured to be capable of positioning between said UV light receiving unit and the test object in such a manner that:
if the test object is a natural diamond, the short-wave UV light emitted from said UV light emission unit is absorbed by the test object and the long-wave UV light emitted from said UV light emission unit is reflected by the test object to said UV light reflecting and guiding unit, wherein the long-wave light reflected by the test object is guided and refracted by said UV light reflecting and guiding unit to said UV light receiving unit, wherein only the long-wave UV light is detected by said UV light receiving unit;
if the test object is a synthetic HPHT/CVD diamond, both the short-wave UV light and said long-wave UV light emitted from said UV light emission unit are reflected by the test object to said UV light reflecting and guiding unit, wherein both the long-wave light and the short-wave light reflected by the test object are guided and refracted by said UV light reflecting and guiding unit to said UV light receiving unit and both the long-wave UV light and the short-wave UV light are detected by said UV light receiving unit;
if the test object is a synthetic moissanite diamond, both the short-wave UV light and the long-wave UV light emitted from said UV light emission unit are absorbed by the test object, such that said UV light receiving unit detects no reflected UV light;
a processing unit contained in said hand-held casing of said portable housing and communicatively connect to said UV light receiving unit so as to process signals sent from said UV light receiving unit according to a detection of no UV light received by said UV light receiving unit, both the long-wave UV light and the short-wave UV light are received by said UV light receiving unit, or only the long-wave UV light received by said UV light receiving unit while both the long-wave UV light and the short-wave UV light are simultaneously emitted from said UV light emission unit and projected to the test object;
an output unit operatively linked to said processing unit and configured to generate a testing result of the test object; and
a control unit configured to supply and control electrical power to said UV light emission unit, said UV light receiving unit, said processing unit, and said output unit.