Plano-concave spherical lenses
Main features
- Fabricated from high-quality UV grade fused silica and BK7 glasses
- Standard diameters are ø12,7 mm and ø25,4 mm
- Focal length selection from -20 mm to -10000 mm
- Antireflective coatings, custom substrate material, dimensions, and focal lengths available upon request
Application examples
- Collimating a convergent beam
- Diverging a collimated beam
- Relay imaging
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- Description
- Drawing
- Standard specifications
Plano-concave spherical lenses have one plano and one spherical concave surface, while their focal lengths are negative. These lenses provide the best performance when used for 5X to infinite-conjugate ratio applications, e.g. collimating a convergent beam, diverging a collimated beam. To prevent spherical aberrations collimated beam should always be incident on the curved lens surface and vice versa.
| Plano-concave lenses | |
|---|---|
| Substrate material | BK7, UVFS |
| Wavelength range | Uncoated BK7 lenses: 350 nm - 2 μm Uncoated UVFS lenses: 185 nm - 2,1 μm |
| Clear aperture | >90% |
| Diameter tolerance | +0,0/-0,1 mm |
| Edge thickness | 2 mm |
| Thickness tolerance | ±0,5 mm |
| Centration error | <3 arcmin |
| Focal length tolerance | ±3%@632,8 nm |
| Protective chamfers | <0,35 mm at 45° |
| Surface quality | 40-20 S-D |
| Surface irregularity | <λ/8@632,8 nm |
| Coatings | Uncoated, available upon request |
Order your item
Material
Diameter
Center thickness
Focal length
SKU
PRICE
QUANTITY
UVFS
⌀50,8 mm
3,1 mm
-250 mm
32269
135 €
UVFS
⌀50,8 mm
3,5 mm
-300 mm
32271
135 €
UVFS
⌀50,8 mm
4,7 mm
-500 mm
32272
135 €
UVFS
⌀50,8 mm
4,7 mm
-1000 mm
32274
135 €
UVFS
⌀50,8 mm
5,8 mm
-2000 mm
32275
135 €
BK7
⌀12,7 mm
2 mm
-25 mm
7507
18 €
BK7
⌀12,7 mm
2 mm
-50 mm
7508
18 €
BK7
⌀12,7 mm
2 mm
-60 mm
7509
18 €
BK7
⌀12,7 mm
2 mm
-75 mm
7510
18 €
BK7
⌀12,7 mm
2 mm
-100 mm
7511
18 €
BK7
⌀12,7 mm
2 mm
-150 mm
7512
18 €
BK7
⌀12,7 mm
2 mm
-200 mm
7513
18 €
BK7
⌀12,7 mm
2 mm
-250 mm
7514
18 €
BK7
⌀12,7 mm
2 mm
-300 mm
7515
18 €
UVFS
⌀12,7 mm
2 mm
-20 mm
7516
32 €
UVFS
⌀12,7 mm
2 mm
-50 mm
7518
32 €
UVFS
⌀12,7 mm
2 mm
-100 mm
7519
32 €
UVFS
⌀12,7 mm
2 mm
-200 mm
7520
32 €
UVFS
⌀12,7 mm
2 mm
-300 mm
7521
32 €
UVFS
⌀12,7 mm
2 mm
-400 mm
7522
32 €
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