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
|
|
|