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Clear Aperture
Conic Constant
The conic constant describes the curve obtained as a conic surface intersects with a plane. There are three general types of conic section: Hyperbola, Parabola and Ellipse (a Circle is a special Ellipse).
Please enter the appropriate constant as shown in the image.
Image by: By 0x30114 at English Wikipedia, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=41395455
Input Beam Diameter (din) 1/e²
Input Beam Diameter (din) 1/e²
Output beam size definition by shape type
