Functions:

1. Optical filtering: The central black microstructure area enables filtering of specific wavelength bands, filters out infrared stray light, restores true colors, and eliminates color cast in endoscopic images.

2. CMOS sensor protection: The thin substrate sheet covers the image sensor surface, isolates body fluids and dust, and prevents the chip from being scratched or contaminated.

3. Positioning and support: The outline fits the lens mount installation position, and the rounded shape matches the narrow space at the distal end of a disposable flexible endoscope, serving as a fixing component for the optical window.

Process characteristics:

Substrate: optical glass / ultra-thin quartz sheet; the central area has a precision photolithography / laser-processed micro-dot array structure

The outer contour is precisely cut by laser, with rounded corners and no burrs, and undergoes medical clean processing

Ultra-thin dimensions, suitable for the front-end optical components of ultra-fine disposable ureteroscopes and choledochoscopes