公开(公告)号：US11333606B2

公开(公告)日：2022-05-17

申请号：US16995931

申请日：2020-08-18

Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.

Inventor： Jiangquan Mai ,  Fangyi Shi ,  Wai Yi Yeung

IPC: G01N21/64 ,  G01N21/87 ,  G01N21/59

Abstract: There is disclosed an apparatus for visually inspecting gemstones. The apparatus contains a first light source, a sample stage adapted to receive a gemstone thereon, and a rotating stage located below the sample stage. The rotating stage is adapted to rotate relative to the sample stage. Embodiments of the invention therefore provide a portable and automatic gemstone inspecting apparatus that provides multiple inspection methods centrally without the need to use other external devices.

公开(公告)号：US20220099572A1

公开(公告)日：2022-03-31

申请号：US17033584

申请日：2020-09-25

Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.

Inventor： Zhinan Yu ,  Chun Chung Chan ,  Jiangquan Mai ,  Fangyi Shi

IPC: G01N21/53 ,  G08B17/107

Abstract: Systems and methods in which multi-dimensional metric monitoring is used with respect to multi-wavelength scattering for smoke detection are described. A multi-dimensional metric may dynamically track a slope of a relationship between scattered light of multiple wavelengths of scattered light being monitored. A multi-dimensional metric monitoring smoke detection algorithm may utilize multi-dimensional thresholds with respect to monitoring of the multi-dimensional metric for initiating a fire alarm and resetting the fire alarm. An optical measuring chamber utilized for providing multi-wavelength scattering signals utilized in deriving a multi-dimensional metric for smoke detection may be configured for wide-scattering-angle signal collection, such as using a light trapping sub-chamber having a light-guide diaphragm assembly configured for wide-scattering-angle signal collection.