Quality biconvex lenses
Description
These crown glass biconvex lenses are suitable for almost all singlet lens applications. The biconvex form is preferred when the conjugates are roughly equal; for focusing collimated light see our range of planoconvex lenses. Most lenses are also stocked in three different AR coatings covering from the visible out to telecoms IR wavelengths. Note special care is taken with the 630-1100nm coating to ensure good performance at 1064nm.
These lenses can readily and quickly be supplied edged to your particular requirements if standard diameters do not suit. Simply click on the 'Modify' button and enter the size you require on the web form. We will get back to you very quickly to confirm your needs and can normally provide the edged lens within 5 working days.
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Diameter |
+0, -0.1 (≤63mm) |
|
Focal length (at 587mm) |
±0.2mm (<10mm) |
|
Scratch-dig |
|
|
Centration |
0.1mm (FL≤40mm) |
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Centre thickness |
±0.35mm |
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Edge thickness |
|
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Lens dia. 2.5mm |
0.75mm |
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Lens dia. 4mm |
1.0mm |
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Lens dia. ≥6.3mm |
1.5mm |
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Material data |
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Coating performance |
See below |
We give below typical reflectance (per surface) performance for our coated singlet lenses. Two typical curves are shown for each coating. Curve 2 applies only to convex surfaces of short radius (R greater than 1.33 x dia.) and Curve 1 to all other surfaces.
Spherical aberration calculation
To calculate the spherical aberration of a system and evaluate its effect proceed as follows.
1. Calculate element contributions
For each lens element work out the wavefront aberration A:
A = ky4/f3
where y is the semi-aperture, or maximum ray height at the element (from an on-axis object); f is the element focal length, and the coefficient k depends on material, shape and conjugates and is given in the relevant section of this catalogue.
2. Sum contributions
Simply add the contributions algebraically to give the total wavefront aberration ƩA (deviation from the best-fit sphere).
3. Evaluate effect
If ƩA is less than λ/4 the system is diffraction limited and aberration can usually be neglected. For larger aberration, the geometrical spot diameter D is given by:
D = 8 ƩAv/y
where y is as above, for the last element, and v is the distance from this element to the image.
For further detail request our Technical Note ‘Spherical aberration’.
- Mounting (lenses up to 50mm dia.)
- Special AR coating
- Edging to smaller diameters
For more details of your modification needs please enquire.
| Item code | Coating type | Focal length (mm) | Diameter (mm) | Back FL (mm) | Centre thickness (mm) | Glass type | Price per item (£ GBP) |
Stock available | Volume discount available |
Datasheets & customisation options |
Select amount |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 VK 10 | AR coated 1100-1600nm | 10 | 10 | 8.5 | 4.3 | BK7 | £29.04 | ||||
| 25 VK 25 | AR coated 1100-1600nm | 25 | 25 | 22.1 | 8.4 | BK7 | £37.18 | ||||
| 32 VK 16 | AR coated 1100-1600nm | 31.5 | 16 | 30.3 | 3.5 | BK7 | £31.90 | ||||
| 32 VK 25 | AR coated 1100-1600nm | 31.5 | 25 | 29.2 | 6.7 | BK7 | £37.18 | ||||
| 40 VK 16 | AR coated 1100-1600nm | 40 | 16 | 38.1 | 3.1 | BK7 | £31.90 | ||||
| 40 VK 25 | AR coated 1100-1600nm | 40 | 25 | 38.1 | 5.5 | BK7 | £36.30 | ||||
| 40 VK 40 | AR coated 1100-1600nm | 40 | 40 | 35.6 | 12.5 | BK7 | £46.64 | ||||
| 50 VK 25 | AR coated 1100-1600nm | 50 | 25 | 48.5 | 4.6 | BK7 | £34.65 | ||||
| 50 VK 40 | AR coated 1100-1600nm | 50 | 40 | 46.6 | 9.9 | BK7 | £46.09 | ||||
| 63 VK 25 | AR coated 1100-1600nm | 63 | 25 | 61.7 | 3.9 | BK7 | £34.65 | ||||
| 63 VK 40 | AR coated 1100-1600nm | 63 | 40 | 60.3 | 7.9 | BK7 | £43.34 | ||||
| 25 VK 16 | AR coated 1100-1600nm | 25 | 16 | 23.6 | 4.1 | BK7 | £31.90 | ||||
| 40 VQ 16 | Uncoated | 40 | 16 | 38.1 | 3.1 | BK7 | £18.48 | ||||
| 10 VK 06 | AR coated 1100-1600nm | 10 | 6.3 | 9.1 | 2.5 | BK7 | £26.73 | ||||
| 08 VK 06 | AR coated 1100-1600nm | 8 | 6.3 | 7 | 2.8 | BK7 | £27.50 | ||||
| 06 VK 06 | AR coated 1100-1600nm | 6.3 | 6.3 | 5.1 | 3.3 | BK7 | £28.38 | ||||
| 80 VQ 25 | Uncoated | 80 | 25 | 78.9 | 3.4 | BK7 | £20.90 | ||||
| 63 VQ 40 | Uncoated | 63 | 40 | 60.3 | 7.9 | BK7 | £25.52 | ||||
| 63 VQ 25 | Uncoated | 63 | 25 | 61.7 | 3.9 | BK7 | £20.90 | ||||
| 50 VQ 40 | Uncoated | 50 | 40 | 46.6 | 9.9 | BK7 | £26.40 | ||||
| 50 VQ 25 | Uncoated | 50 | 25 | 48.5 | 4.6 | BK7 | £20.90 | ||||
| 40 VQ 40 | Uncoated | 40 | 40 | 35.6 | 12.5 | BK7 | £27.17 | ||||
| 40 VQ 25 | Uncoated | 40 | 25 | 38.1 | 5.5 | BK7 | £22.44 | ||||
| 80 VK 25 | AR coated 1100-1600nm | 80 | 25 | 78.9 | 3.4 | BK7 | £34.65 | ||||
| 100 VB 40 | AR coated 450-900nm | 100 | 40 | 98.1 | 5.4 | BK7 | £41.91 | ||||
| 25 VB 16 | AR coated 450-900nm | 25 | 16 | 23.6 | 4.1 | BK7 | £31.35 | ||||
| 20 VB 16 | AR coated 450-900nm | 20 | 16 | 18.3 | 4.9 | BK7 | £32.45 | ||||
| 16 VB 16 | AR coated 450-900nm | 16 | 16 | 13.9 | 6 | BK7 | TBA | Send us a stock query | |||
| 25 VB 10 | AR coated 450-900nm | 25 | 10 | 24.2 | 2.5 | BK7 | £26.84 | ||||
| 20 VB 10 | AR coated 450-900nm | 20 | 10 | 19.1 | 2.8 | BK7 | £26.84 | ||||
| 16 VB 10 | AR coated 450-900nm | 16 | 10 | 14.9 | 3.1 | BK7 | £26.84 | ||||
| 12 VB 10 | AR coated 450-900nm | 12.5 | 10 | 11.2 | 3.6 | BK7 | £27.39 | ||||
| 10 VB 10 | AR coated 450-900nm | 10 | 10 | 8.5 | 4.3 | BK7 | £28.27 | ||||
| 10 VB 06 | AR coated 450-900nm | 10 | 6.3 | 9.1 | 2.5 | BK7 | TBA | Send us a stock query | |||
| 08 VB 06 | AR coated 450-900nm | 8 | 6.3 | 7 | 2.8 | BK7 | £26.73 | ||||
| 32 VB 16 | AR coated 450-900nm | 31.5 | 16 | 30.3 | 3.5 | BK7 | TBA | Send us a stock query | |||
| 40 VB 16 | AR coated 450-900nm | 40 | 16 | 38.1 | 3.1 | BK7 | £31.35 | ||||
| 63 VB 40 | AR coated 450-900nm | 63 | 40 | 60.3 | 7.9 | BK7 | £41.91 | ||||
| 50 VB 40 | AR coated 450-900nm | 50 | 40 | 46.6 | 9.9 | BK7 | £44.33 | ||||
| 40 VB 40 | AR coated 450-900nm | 40 | 40 | 35.6 | 12.5 | BK7 | £45.10 | ||||
| 100 VB 25 | AR coated 450-900nm | 100 | 25 | 99 | 3 | BK7 | £33.88 | ||||
| 80 VB 25 | AR coated 450-900nm | 80 | 25 | 78.9 | 3.4 | BK7 | £33.88 | ||||
| 63 VB 25 | AR coated 450-900nm | 63 | 25 | 61.7 | 3.9 | BK7 | £33.88 | ||||
| 50 VB 25 | AR coated 450-900nm | 50 | 25 | 48.5 | 4.6 | BK7 | £33.88 | ||||
| 40 VB 25 | AR coated 450-900nm | 40 | 25 | 38.1 | 5.5 | BK7 | £35.31 | ||||
| 32 VB 25 | AR coated 450-900nm | 31.5 | 25 | 29.2 | 6.7 | BK7 | TBA | Send us a stock query | |||
| 25 VB 25 | AR coated 450-900nm | 25 | 25 | 22.1 | 8.4 | BK7 | £36.19 | ||||
| 06 VB 06 | AR coated 450-900nm | 6.3 | 6.3 | 5.1 | 3.3 | BK7 | £27.61 | ||||
| 32 VQ 25 | Uncoated | 31.5 | 25 | 29.2 | 6.7 | BK7 | TBA | Send us a stock query | |||
| 10 VQ 06 | Uncoated | 10 | 6.3 | 9.1 | 2.5 | BK7 | £15.29 | ||||
| 08 VQ 06 | Uncoated | 8 | 6.3 | 7 | 2.8 | BK7 | £15.29 | ||||
| 06 VQ 06 | Uncoated | 6.3 | 6.3 | 5.1 | 3.3 | BK7 | £16.17 | ||||
| 80 VI 25 | AR coated 630-1100nm | 80 | 25 | 78.9 | 3.4 | BK7 | £33.88 | ||||
| 63 VI 40 | AR coated 630-1100nm | 63 | 40 | 60.3 | 7.9 | BK7 | £41.91 | ||||
| 63 VI 25 | AR coated 630-1100nm | 63 | 25 | 61.7 | 3.9 | BK7 | £33.88 | ||||
| 50 VI 40 | AR coated 630-1100nm | 50 | 40 | 46.6 | 9.9 | BK7 | £44.33 | ||||
| 50 VI 25 | AR coated 630-1100nm | 50 | 25 | 48.5 | 4.6 | BK7 | £33.88 | ||||
| 40 VI 40 | AR coated 630-1100nm | 40 | 40 | 35.6 | 12.5 | BK7 | £45.10 | ||||
| 40 VI 25 | AR coated 630-1100nm | 40 | 25 | 38.1 | 5.5 | BK7 | £35.31 | ||||
| 10 VQ 10 | Uncoated | 10 | 10 | 8.5 | 4.3 | BK7 | TBA | Send us a stock query | |||
| 100 VQ 25 | Uncoated | 100 | 25 | 99 | 3 | BK7 | £20.90 | ||||
| 32 VQ 16 | Uncoated | 31.5 | 16 | 30.3 | 3.5 | BK7 | £18.48 | ||||
| 25 VQ 25 | Uncoated | 25 | 25 | 22.1 | 8.4 | BK7 | £22.44 | ||||
| 25 VQ 16 | Uncoated | 25 | 16 | 23.6 | 4.1 | BK7 | £18.48 | ||||
| 25 VQ 10 | Uncoated | 25 | 10 | 24.2 | 2.5 | BK7 | £15.29 | ||||
| 20 VQ 16 | Uncoated | 20 | 16 | 18.3 | 4.9 | BK7 | £19.14 | ||||
| 20 VQ 10 | Uncoated | 20 | 10 | 19.1 | 2.8 | BK7 | £15.29 | ||||
| 16 VQ 16 | Uncoated | 16 | 16 | 13.9 | 6 | BK7 | £19.91 | ||||
| 16 VQ 10 | Uncoated | 16 | 10 | 14.9 | 3.1 | BK7 | TBA | Send us a stock query | |||
| 12 VQ 10 | Uncoated | 12.5 | 10 | 11.2 | 3.6 | BK7 | £15.29 | ||||
| 100 VQ 40 | Uncoated | 100 | 40 | 98.1 | 5.4 | BK7 | £25.52 | ||||
| 40 VI 16 | AR coated 630-1100nm | 40 | 16 | 38.1 | 3.1 | BK7 | £31.35 | ||||
| 32 VI 25 | AR coated 630-1100nm | 31.5 | 25 | 29.2 | 6.7 | BK7 | TBA | Send us a stock query | |||
| 10 VI 06 | AR coated 630-1100nm | 10 | 6.3 | 9.1 | 2.5 | BK7 | £26.18 | ||||
| 08 VI 06 | AR coated 630-1100nm | 8 | 6.3 | 7 | 2.8 | BK7 | £26.73 | ||||
| 06 VI 06 | AR coated 630-1100nm | 6.3 | 6.3 | 5.1 | 3.3 | BK7 | £27.61 | ||||
| 25 VK 10 | AR coated 1100-1600nm | 25 | 10 | 24.2 | 2.5 | BK7 | £27.39 | ||||
| 20 VK 16 | AR coated 1100-1600nm | 20 | 16 | 18.3 | 4.9 | BK7 | £33.22 | ||||
| 20 VK 10 | AR coated 1100-1600nm | 20 | 10 | 19.1 | 2.8 | BK7 | £27.39 | ||||
| 16 VK 16 | AR coated 1100-1600nm | 16 | 16 | 13.9 | 6 | BK7 | £33.99 | ||||
| 16 VK 10 | AR coated 1100-1600nm | 16 | 10 | 14.9 | 3.1 | BK7 | £27.39 | ||||
| 12 VK 10 | AR coated 1100-1600nm | 12.5 | 10 | 11.2 | 3.6 | BK7 | £28.16 | ||||
| 100 VK 40 | AR coated 1100-1600nm | 100 | 40 | 98.1 | 5.4 | BK7 | £43.34 | ||||
| 10 VI 10 | AR coated 630-1100nm | 10 | 10 | 8.5 | 4.3 | BK7 | £28.27 | ||||
| 100 VI 25 | AR coated 630-1100nm | 100 | 25 | 99 | 3 | BK7 | £33.88 | ||||
| 32 VI 16 | AR coated 630-1100nm | 31.5 | 16 | 30.3 | 3.5 | BK7 | £31.35 | ||||
| 25 VI 25 | AR coated 630-1100nm | 25 | 25 | 22.1 | 8.4 | BK7 | £36.19 | ||||
| 25 VI 16 | AR coated 630-1100nm | 25 | 16 | 23.6 | 4.1 | BK7 | £31.35 | ||||
| 25 VI 10 | AR coated 630-1100nm | 25 | 10 | 24.2 | 2.5 | BK7 | £26.84 | ||||
| 20 VI 16 | AR coated 630-1100nm | 20 | 16 | 18.3 | 4.9 | BK7 | £32.45 | ||||
| 20 VI 10 | AR coated 630-1100nm | 20 | 10 | 19.1 | 2.8 | BK7 | £26.84 | ||||
| 16 VI 16 | AR coated 630-1100nm | 16 | 16 | 13.9 | 6 | BK7 | £33.22 | ||||
| 16 VI 10 | AR coated 630-1100nm | 16 | 10 | 14.9 | 3.1 | BK7 | £26.84 | ||||
| 12 VI 10 | AR coated 630-1100nm | 12.5 | 10 | 11.2 | 3.6 | BK7 | £27.39 | ||||
| 100 VI 40 | AR coated 630-1100nm | 100 | 40 | 98.1 | 5.4 | BK7 | £41.91 | ||||
| 100 VK 25 | AR coated 1100-1600nm | 100 | 25 | 99 | 3 | BK7 | £34.65 | ||||
For more information regarding stock availability icons, please see our shipping page.
