Xiamen Gelashi Optical Co., Ltd: We're professional sunglasses, optical frames, reading glasses, kids eyewear, sports sunglasses manufacturers and suppliers in China. We warmly welcome you to
... Read more
It is the key component of interferometer, and its main parameters include focal length, field of view, wavelength range and so on. These parameters determine the resolution, detection sensitivity and
... Read more
Relief, also known as "convex carving", is a raised artistic image carved on a plane. According to the degree of surface convexity, relief is divided into high relief (high and low undulations, deep
... Read more