Aspheric Condenser Lens
1. On one surface of the condenser lens, the radius of curvature varies with the height from the optical axis, thereby achieving minimal spherical aberration. 2. Compared with spherical lenses, it has a larger clear aperture, higher NA and lower f/# value. 3. Compared with other lenses, it has a shorter focal length and is used closer to other optical elements. 4. It is generally pressed from B270 optical glass, enabling the fabrication of complex surfaces that are difficult to grind.
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