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Plano-Convex Axicons

Plano-Convex Axicons




Regular, precision


Ø25.4 mm

Surface quality, S-D


Surface irregularity, RMS

<λ/4 @ 632.8 mm

Apex angle

90 – 179°

Apex angle tolerance

±0.02 – 0.5°

AR coatings

UV, VIS, NIR, uncoated

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Plano-convex axicons (conical lenses) are used for a variety of applications.

Altechna offers two types of plano-convex axicons: regular and precision. Regular axicons create an annular beam in a far field, while precision-type axicons also transform a Gaussian beam into a non-diffractive Bessel beam in the near field.

The quality of generated ring and Bessel beam as well as all mechanical tolerances, are fully evaluated in our metrology laboratory using different measurement methods. Please feel free to contact our support team with any questions you may have.

Main features Regular Precision
Production method: Conventional polishing CNC polishing
Tip accuracy: Medium Very high
Performance: Ring generation Ring + Bessel beam generation
Apex angle: 90 - 179° 170 - 179°
Apex angle tolerance: ± 0.5° ± 0.05°
Application: Laser drilling, microscopy, medical applications Scanning imaging systems, atom or molecule guiding, microfabrication

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