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.
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| 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
Request
UVFS
Plano-concave
Regular
⌀25,4 mm
160°
7646
Request
UVFS
Plano-concave
Regular
⌀25,4 mm
170°
7647
Request
UVFS
Plano-concave
Regular
⌀25,4 mm
175°
7648
Request
UVFS
Plano-concave
Regular
⌀25,4 mm
179°
7649
Request
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