Senior sales engineer
Arminas Butkus +370 5 219 4884
Axicons (conical lenses)
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Axicons (conical lenses)

Main features

 

  • Fabricated from high-quality UV grade fused silica, BK7 glasses
  • Plano-convex and plano-concave designs
  • Regular and advanced grade axicons
  • Wide axicon apex angle selection
  • Antireflective coatings, customization available upon request

 

Application examples

 

  • Corneal surgery
  • Optical coherence tomography
  • Atom trapping
Request custom View stock
  • Description
  • Drawing
  • Standard specifications

Axicons (conical lenses) are famous due to their ability to their transform a collimated Gaussian beam into an approximation of non-diffracting Bessel beam in the near-field and ring-shaped beam in the far-field. Most often they are used in tandem with other types of lenses. 4Lasers provide plano-convex and plano-concave types of conical lenses. These lenses feature one convex surface or one concave conical surface, respectively, while the second surface is plano in both cases.

Axicons
Type Plano-convex Plano-concave
Substrate material BK7, UVFS UVFS
Wavelength range Uncoated BK7 axicons: 350 nm - 2 μm
Uncoated UVFS axicons: 185 nm - 2,1 μm
Clear aperture >90% >90%
Diameter tolerance +0,0/-0,1 mm +0,0/-0,1 mm
Apex rounding Regular: <⌀1 mm
Advanced: <⌀0,4 mm
N/A
Angle tolerance Regular: ±0,5°
Advanced: ±0,1°
Regular: ±0,5
Central hole N/A Regular: ~⌀1 mm,
depth ~2 mm
Protective chamfers <0,35 mm at 45° <0,35 mm at 45°
Coatings Uncoated Uncoated
Surface quality Regular: 60-40 S-D
Advanced: 40-20 S-D
60-40 S-D
Surface irregularity Regular: <1λ@632,8 nm
Advanced: <λ/4@632,8 nm
<1λ@632,8 nm
Coatings Uncoated Uncoated
Order your item
Material Shape Grade Diameter Apex angle SKU PRICE QUANTITY
UVFS
Plano-convex
Advanced
⌀25,4 mm
130°
7632
360 €
UVFS
Plano-convex
Advanced
⌀25,4 mm
140°
7633
360 €
UVFS
Plano-convex
Advanced
⌀25,4 mm
160°
7634
360 €
UVFS
Plano-convex
Advanced
⌀25,4 mm
170°
7635
360 €
UVFS
Plano-convex
Advanced
⌀25,4 mm
175°
7636
360 €
UVFS
Plano-convex
Advanced
⌀25,4 mm
176°
7637
360 €
UVFS
Plano-convex
Advanced
⌀25,4 mm
178°
7638
360 €
UVFS
Plano-convex
Advanced
⌀25,4 mm
179°
7639
360 €
BK7
Plano-convex
Regular
⌀25,4 mm
140°
7640
160 €
BK7
Plano-convex
Regular
⌀25,4 mm
160°
7641
160 €
BK7
Plano-convex
Regular
⌀25,4 mm
170°
7642
160 €
BK7
Plano-convex
Regular
⌀25,4 mm
175°
7643
160 €
BK7
Plano-convex
Regular
⌀25,4 mm
178°
7644
160 €
UVFS
Plano-concave
Regular
⌀25,4 mm
140°
7645
480 €
UVFS
Plano-concave
Regular
⌀25,4 mm
160°
7646
480 €
UVFS
Plano-concave
Regular
⌀25,4 mm
170°
7647
480 €
UVFS
Plano-concave
Regular
⌀25,4 mm
175°
7648
480 €
UVFS
Plano-concave
Regular
⌀25,4 mm
179°
7649
480 €