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Plano-Convex (PCX) Axicons

Plano-Convex (PCX) Axicons
  • Creates a Ring Shaped Approximation of a Bessel Beam
  • Available Uncoated or Anti-Reflection Coated
  • Offered in a Variety of Apex Angles

Plano-Convex (PCX) Axicons feature one conical surface and one plano surface. They are used to produce a non-diffractive ring-shaped beam that increases in diameter over distance while retaining a constant ring thickness. When used with a collimated Gaussian beam, Plano-Convex (PCX) Axicons create an approximation of a Bessel beam ideal for a range of medical, research, measurement, and alignment applications. They feature a precision fused silica substrate and are available uncoated and with a wide selection of anti-reflection (AR) coating options.

A Bessel beam is a non-diffractive beam comprised of rings equal in power to one another. Although Bessel beams are only theoretically possible because they require an infinite amount of energy, the output of Plano-Convex (PCX) Axicons offer a good approximation by maintaining a high level of the non-diffractive Bessel beam properties.

The ring thickness (t) is easily defined by taking ½ of the beam diameter (db):

The diameter of the ring (dr) is defined using the length from lens output to image (L), the index of refraction of the lens material (n), and the angle a:

For optimum performance, we recommend using Plano-Convex (PCX) Axicons in conjunction with one of our beam expanders in order to ensure a beam diameter of at least 50% of the clear aperture.


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Description Stock No. Price In Stock Qty
Showing 1-20 of 36 Items | Show All Items Sort by Spec
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Axicon 90° Apex Angle, 25.4mm Dia, Uncoated
#83-779 In Stock and Ready to Ship.
Axicon 130° Apex Angle, 25.4mm Dia, Uncoated
#83-780 In Stock and Ready to Ship.
Axicon 140° Apex Angle, 25.4mm Dia, Uncoated
#83-781 In Stock and Ready to Ship.
Axicon 160° Apex Angle, 25.4mm Dia, Uncoated
#83-782 Out of Stock. Click to Receive an Email with Delivery Details.
Axicon 170° Apex Angle, 25.4mm Dia, Uncoated
#83-783 Out of Stock. Click to Receive an Email with Delivery Details.
Axicon 175° Apex Angle, 25.4mm Dia, Uncoated
#83-784 In Stock and Ready to Ship.
Axicon 176° Apex Angle, 25.4mm Dia, Uncoated
#83-785 In Stock and Ready to Ship.
Axicon 178° Apex Angle, 25.4mm Dia, Uncoated
#83-786 In Stock and Ready to Ship.
Axicon 179° Apex Angle, 25.4mm Dia, Uncoated
#83-787 In Stock and Ready to Ship.
Axicon 90° Apex Angle, 25.4mm Dia, VIS 0° Coating
#83-788 In Stock and Ready to Ship.
Axicon 130° Apex Angle, 25.4mm Dia, VIS 0° Coating
#83-789 In Stock and Ready to Ship.
Axicon 140° Apex Angle, 25.4mm Dia, VIS 0° Coating
#83-790 In Stock and Ready to Ship.
Axicon 160° Apex Angle, 25.4mm Dia, VIS 0° Coating
#83-791 In Stock and Ready to Ship.
Axicon 170° Apex Angle, 25.4mm Dia, VIS 0° Coating
#83-792 Out of Stock. Click to Receive an Email with Delivery Details.
Axicon 175° Apex Angle, 25.4mm Dia, VIS 0° Coating
#83-793 In Stock and Ready to Ship.
Axicon 176° Apex Angle, 25.4mm Dia, VIS 0° Coating
#83-794 In Stock and Ready to Ship.
Axicon 178° Apex Angle, 25.4mm Dia, VIS 0° Coating
#83-795 In Stock and Ready to Ship.
Axicon 179° Apex Angle, 25.4mm Dia, VIS 0° Coating
#83-796 In Stock and Ready to Ship.
Axicon 90° Apex Angle, 25.4mm Dia, UV-AR Coating
#83-797 In Stock and Ready to Ship.
Axicon 130° Apex Angle, 25.4mm Dia, UV-AR Coating
#83-798 In Stock and Ready to Ship.
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