Home / Custom / Optical Lens / Medical Endoscope Objective / Gastroscopy & Colonoscopy 
Gastroscopy and colonoscopy are endoscopic instruments used to examine the gastrointestinal tract. They are characterized by clear imaging, a wide field of view, few blind spots, and ease of operation. They can be inserted into the body through the mouth or anus to examine the esophagus, stomach, duodenum, colon, and other parts of the body. The performance of the objective lens assembly directly determines the image quality of the endoscope.
Optical glass such as K9, fused silica, sapphire, MgF2, silicon (Si), ZnSe, ZnS, etc. These materials possess high transmittance, low absorption, low scattering, uniform refractive index, and specific dispersion characteristics.
Precisely hemispherical. The machining precision of the center and radius of curvature of the sphere is extremely high.
The surface is precision polished to an optical grade of 10-5 to ensure image quality and reduce scattering and aberrations.
An AR coating is typically applied to the concave surface to maximize the transmittance of specific wavelengths of light (e.g. visible light) and reduce reflection loss.
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