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Best Form Lenses

Best Form Lenses

In best form lenses the ratio of the curvatures of the two surfaces is chosen to minimize spherical aberration and coma for infinite object distance (i.e. for focusing of parallel beams). In this respect the lenses have the best spherical form.

We manufacture best form lenses from flint glass SFL 57 as well as from synthetic fused silica. Flint glass allows to achieve smaller residual aberrations due to its high refractive index. Lenses made of fused silica can be used in the deep UV down to 180 nm.

For best-form-lenses with 25 mm and 40 mm diameter we also offer mounts . For the smaller lenses adapter plates (25 mm outer diameter) are available which enable the mounting of the smaller lenses in the 25 mm holders. alvailable.

Optical specifications

material SFL 57 fused silica
Article-No.: OBF OBS
spectral range 400-2700 nm 180-2500 nm
refractive index 1,840 (λ=633 nm) 1,486 (λ=308 nm)
surface accuracy irregularity <λ/4 <λ/4
centering tolerance <5’ <5’
tolerance outer diameter ±0,1 mm ±0,1 mm
tolerance center thickness ±0,1 mm ±0,1 mm

Standard dimensions

focal length [mm] Art. No. SFL 57 Ø mm d mm Art. No. fused silica Ø mm d mm
10 OBF 1.010 10 4 OBS 1.010 8 5
15 OBF 1.015 15 4 OBS 1.015 10 4
20 OBF 1.020 20 7 OBS 1.020 15 6
25 OBF 1.025 25 7 OBS 1.025 20 7
30 OBF 1.030 25 6 OBS 1.030 20 6
50 OBF 1.050 25 5 OBS 1.050 25 6
75 OBF 1.075 25 5 OBS 1.075 25 6
100 OBF 1.100 25 5 OBS 1.100 25 4
150 OBF 1.150 25 5 OBS 1.150 25 4
200 OBF 1.200 25 4 OBS 1.200 25 4
250 OBF 1.250 25 4 OBS 1.250 25 4
300 OBF 1.300 25 4 OBS 1.300 25 4
500 OBF 1.500 25 4 OBS 1.500 25 4
750 OBF 1.750 25 4 OBS 1.750 25 4
1000 OBF 1.999 25 4 OBS 1.999 25 4
2000 OBF 998 25 4 OBS 998 25 4
100 OBF 4.100 40 6 OBS 4.100 40 7
150 OBF 4.150 40 6 OBS 4.150 40 6
200 OBF 4.200 40 6 OBS 4.200 40 5
250 OBF 4.250 40 6 OBS 4.250 40 5
300 OBF 4.300 40 6 OBS 4.300 40 5
500 OBF 4.500 40 5 OBS 4.500 40 5
750 OBF 4.750 40 5 OBS 4.750 40 5
1000 OBF 4.999 40 5 OBS 4.999 40 5
2000 OBF 4.998 40 5 OBS 4.998 40 5
-10 OBF 0.010 10 3 OBS 0.010 10 3
-30 OBF 0.030 25 6 OBS 0.030 20 5
-100 OBF 0.100 25 3 OBS 0.100 25 4
-300 OBF 0.300 25 4 OBS 0.300 25 4

Prices

Art.-No. 1 piece in € 2-5 pieces in € 6-10 pieces in €
OBF 0.010 87,- 71,- 65,-
OBF 0.030 87,- 71,- 65,-
OBF 0.100 87,- 71,- 65,-
OBF 0.300 87,- 71,- 65,-
OBF 1.010 80,- 65,- 59,-
OBF 1.015 80,- 65,- 59,-
OBF 1.020 80,- 65,- 59,-
OBF 1.025 85,- 72,- 66,-
OBF 1.030 85,- 72,- 66,-
OBF 1.050 85,- 72,- 66,-
OBF 1.075 85,- 72,- 66,-
OBF 1.100 85,- 72,- 66,-
OBF 1.150 85,- 72,- 66,-
OBF 1.200 85,- 72,- 66,-
OBF 1.300 85,- 72,- 66,-
OBF 1.500 85,- 72,- 66,-
OBF 1.750 85,- 72,- 66,-
OBF 1.998 85,- 72,- 66,-
OBF 1.999 85,- 72,- 66,-
OBF 4.100 141,- 119,- 110,-
OBF 4.150 141,- 119,- 110,-
OBF 4.200 141,- 119,- 110,-
OBF 4.300 141,- 119,- 110,-
OBF 4.500 141,- 119,- 110,-
OBF 4.750 141,- 119,- 110,-
OBF 4.998 141,- 119,- 110,-
OBF 4.999 141,- 119,- 110,-

Prices

Art.-No. 1 piece in € 2-5 pieces in € 6-10 pieces in €
OBS 0.010 87,- 71,- 65,-
OBS 0.030 87,- 71,- 65,-
OBS 0.100 87,- 71,- 65,-
OBS 0.300 87,- 71,- 65,-
OBS 1.010 80,- 65,- 59,-
OBS 1.015 80,- 65,- 59,-
OBS 1.020 80,- 65,- 59,-
OBS 1.025 85,- 72,- 66,-
OBS 1.030 85,- 72,- 66,-
OBS 1.050 85,- 72,- 66,-
OBS 1.075 85,- 72,- 66,-
OBS 1.100 85,- 72,- 66,-
OBS 1.150 85,- 72,- 66,-
OBS 1.200 85,- 72,- 66,-
OBS 1.250 85,- 72,- 66,-
OBS 1.300 85,- 72,- 66,-
OBS 1.500 85,- 72,- 66,-
OBS 1.750 85,- 72,- 66,-
OBS 1.998 85,- 72,- 66,-
OBS 1.999 85,- 72,- 66,-
OBS 4.100 141,- 119,- 110,-
OBS 4.150 141,- 119,- 110,-
OBS 4.200 141,- 119,- 110,-
OBS 4.250 141,- 119,- 110,-
OBS 4.300 141,- 119,- 110,-
OBS 4.500 141,- 119,- 110,-
OBS 4.750 141,- 119,- 110,-
OBS 4.998 141,- 119,- 110,-
OBS 4.999 141,- 119,- 110,-

Price custom version

Anthee focal lengthn, Diameter und Gläser

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