The endoscope is a test instrument that integrates traditional optics, ergonomics, precision machinery, modern electronics, mathematics, and software. One has an image sensor, an optical lens, a light source illumination, a mechanical device, etc., which can enter the stomach through the oral cavity or enter the body through other natural channels. The endoscope can be used to see lesions that X-rays cannot display, so it is very useful for doctors. For example, an endoscopic doctor can observe ulcers or tumors in the stomach and develop an optimal treatment plan accordingly. The endoscope in medicine is a combination of multiple lenses, which can clearly image the optical system in the natural passage or tiny wound of the human body. A general endoscope is composed of an objective lens portion, a imaging portion, and an eyepiece portion. Its characteristics are: small size, the diameter of the general medical endoscope is about 2-6mm; the lens has a large field of view, and can be clearly imaged in the field of view above 90°. These features of the endoscope make it widely used in minimally invasive surgery.With the continuous development of science and technology, the accuracy requirements for imaging are also getting higher and higher.BRD Optical is positioned in the market to focus on the development of microscopic lenses to enhance the imaging of endoscopes. Our small size lenses have been recognized by the market.