LL high O&E technology co.,ltd. is  a manufacturer of high-end optical equipment which take research and development as a highest place, in which, products includes lightening illumination and measurement areas.

In measurement area, products include Dynamic Micro ESPI Strain Gauge/Instrument, In-Plane ESPI Instrument, Out-of-Plane ESPI Instrument, ESSPI Instrument, 2D Digital Speckle Correlation Instrument, Phase Shift Projection Measuring Instrument, 3D Phase Shifting Electronic Speckle Pattern Interferometry/Instrument, 3D Shape Measurement System (macro/micro), 3D Digital Image Correlation Measurement Systems, 3D Moire Interferometry, LED Digital Photoelastic Instrument, Multi-function Optical Measurement Mechanical Systems. Related optical measurement products have been successfully applied in Xi'an Jiaotong University, Nanjing University of Aeronautics and Astronautics, Tsinghua University, Southeast University and many other colleges and universities to the research and development works, and customized products has been successfully applied in developing new material performance testing in Xi'an Institute of Optics and Mechanics Institute.

Company has more than 20 authorized patents, in which product closely related there are more than 10, so, LL HIGH company is currently playing the first role in domestic industry.