Changchun Positive Optics Co., Ltd.

Neutral Density (ND) filters are designed to reduce transmission evenly across a portion of a specific spectrum. Theyare typically defined by their Op

retroreflector prism consists of three mutually perpendicular reflecting surfaces that form an angular cone structure with an internal angle of 90 deg

plano-convex lenses have a positive focal length and can be used to focus collimated light, to collimate a point source, or reduce the divergence angl

Cylinder Lenses are typically used to focus incoming light to a line, or to change the aspect ratio of an image. Cylindrical Lenses have a single cyli