Plano-convex lenses (PCX) have a positive focal length and are primarily used for image magnification and light focusing applications.
A plano-convex lens focuses parallel light rays or generates parallel light rays from a point light source. It is also used to form images with magnification or reduction ratios greater than 5:1. In either case, it can be placed so that it faces either the convex surface or the long distance side, and it can also be used as a relay lens with little aberration by positioning two same Kei plano-convex lenses facing each other.
■Material: BK-7
BK Group glass has been widely used for a long time because it has good light transmittance up to short wavelengths, has few bubbles, striae, and discoloration, and is hard and scratch-resistant. Among them, BK7 is a relatively hard glass that is scratch resistant, easy to handle, and does not require any special treatment when polishing. The bubbles and inclusions contained in BK7 are 0.029 mm2 per 100 cm2, and it has good transmittance for wavelengths above 350 nm.
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