Achromatic Lens

Optics >>> Lens >> Achromatic Lens

Achromatic Lenses consist of two or more elements, usually of crown and flint glass that have been corrected for chromatic aberration with respect to two selected wavelengths.  

Red Optronics provides achromatic lenses consisting of two elements.  These lenses have considerably reduced not only chromatic aberration bust also spherical aberration and coma aberration.  These are designed with respect to three wavelength 480nm, 546.1nm and 643.8nm.  They are best used in replacing singlet where improved performance is required.  

The minimum diameter of Achromatic Lens we can process is 3.5mm.

Main Specifications  
Design Wavelength 480nm, 546.1nm, 643.8nm
Diameter Tolerance -0.0, -0.15mm
Paraxial Focal Length 2% @632.8nm
Centration < 3 arc minutes
Clear Aperture >85%
Surface Figure l/4@632.8nm
Surface Quality 60-40 scratch and dig
Coating 1/4 wave MgF2@550nm
Bevel 0.25 mm x 45

    

Negative Achromatic Lenses
Part No.
f
(mm)
F
(mm)
R1
(mm)
R2=R3
(mm)
R4
(mm)
Tc1
(mm)
Tc2
(mm)
fb
(mm)
Lens A
Lens B
ALN-0201
-25.0
12.7
-15.6
13.09
44.16
3.0
2.67
-27.5
BK7
F2
ALN-0202
-40.0
12.7
-24.45
17.97
66.6
3.0
2.34
-42.5
BK7
F2
ALN-0301
-50.0
25.4
-31.19
24.89
85.31
3.0
4.22
-53.3
BK7
F2

 

Positive Achromatic Lenses
Part No.
f
(mm)
F
(mm)
R1
(mm)
R2=R3
(mm)
R4
(mm)
Tc1
(mm)
Tc2
(mm)
fb
(mm)
Lens A
Lens B
ALP-0101
15.0
6.0
8.831
-6.546
-19.77
2.71
1
13.066
BK7
SF5
ALP-0102
20.0
6.0
12.356
-8.511
-24.38
2.6
1
18.288
BK7
SF5
ALP-0103
25.0
6.0
15.704
-10.666
-29.99
2.3
1
23.455
BK7
SF5
ALP-0104
30.0
6.0
18.88
-12.942
-36.48
1.9
1
28.695
BK7
SF5
ALP-0105
25.0
8.0
15.596
-10.814
-30.48
2.9
1
23.125
BK7
SF5
ALP-0106
30.0
8.0
18.88
-12.882
-36.22
2.7
1
28.277
BK7
SF5
ALP-0107
20.0
10.0
12.3
-9.02
-25.23
3.6
1
17.625
BK7
SF5
ALP-0201
25.0
12.0
15.346
-11.35
-31.92
4.2
1.3
22.286
BK7
SF5
ALP-0202
25.0
12.7
15.596
-11.402
-31.05
4.3
1.3
22.251
BK7
SF5
ALP-0203
30.0
12.7
18.535
-13.49
-37.84
4
1.3
27.36
BK7
SF5
ALP-0204
40.0
12.7
25.23
-17.539
-48.75
3.4
1.3
37.778
BK7
SF5
ALP-0205
50.0
12.7
31.26
-21.93
-62.37
3.1
1.3
47.992
BK7
SF5
ALP-0206
60.0
12.7
37.33
-26.42
-75.86
2.8
1.3
58.127
BK7
SF5
ALP-0207
75.0
12.7
46.77
-32.96
-94.62
2.6
1.3
73.227
BK7
SF5
ALP-0208
65.0
20.0
40.09
-29.58
-83.59
6.3
2
60.868
BK7
SF5
ALP-0301
60.0
25.4
37.33
-27.16
-75.86
7
2
55.565
BK7
SF5
ALP-0302
120.0
25.4
73.28
-54.33
-159.96
4.2
2
117.103
BK7
SF5

 

    

    

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