透镜事业

Achromatic Lenses

Achromatic Lenses

Achromatic lenses are very common type of viewer lenses, they consist of two or more lense elements,which
have been corrected for chromatic aberration with respect to two selected wavelengths, The elements must
be fixed in relation to one another by either mounting or cement.

Achromatic Lenses are designed to specifically function within the infrared, visible, or ultra-violet wavelength
 ranges, and they are not symmetric devices. They must be installed with the correct front-to-back orientation
 (thicker element usually faces the eyes). If installed incorrectly, with the lens orientation installed backwards
 the result will be extensive distortion and aberration.

Design Wavelength:-----------------------------upon request                                                                                                                                      

Diameter Tolerance(mm): +0.0/-0.2 (General),+0.0/-0.2(High Precision)
Paraxial Focal Length Tolerance:-----------------------------------±2%
Centration: ---------------------------------------------------------------<3 arc minutes
Clear Aperture: --------------------------------------------------------->80%(small size) ,>95%(large size)
Surface Figure(per 25mm @ 632.8nm):-------------------------------------------<1.5λ, (General), <λ/4 (High Precision)
 Irregularity ( @ 632.8nm)----------------------------------------------------------<λ/4 (General), <λ/10 (High Precision)
Surface Quality: --------------------------------------------------------60/40 (General), 10/5 (High Precision)
Bevel:----------------------------------------------------------------------< 0.25 mm x 45°
Coating:------------------------------------------------------------------ upon request 

Negative Acromatec Lenses

Part No.
f(mm)
F(mm)
R1(mm)
R2=R3(mm)
R4(mm)
t c1(mm)
t c2(mm)
fb(mm)
Lens A
Lens B
ALN0201
-25.0
12.7
-15.6
13.09
44.16
3.0
2.67
-27.5
N-BK7
F2
ALN0202
-40.0
12.7
-24.45
17.97
66.6
3.0
2.34
-42.5
N-BK7
F2
ALN0301
-50.0
25.4
-31.19
24.89
85.31
3.0
4.22
-53.3
N-BK7
F2

Positive Achromatic Lenses

Part No.
f(mm)
F(mm)
R1(mm)
R2=R3(mm)
R4(mm)
t c1(mm)
t c2(mm)
fb(mm)
Lens A
Lens B
ALP0101
15.0
6.0
8.831
-6.546
-19.77
2.71
1
13.066
N-BK7
N-SF5
ALP0102
20.0
6.0
12.356
-8.511
-24.38
2.6
1
18.288
N-BK7
N-SF5
ALP0103
25.0
6.0
15.704
-10.666
-29.99
2.3
1
23.455
N-BK7
N-SF5
ALP0104
30.0
6.0
18.88
-12.942
-36.48
1.9
1
28.695
N-BK7
N-SF5
ALP0105
25.0
8.0
15.596
-10.814
-30.48
2.9
1
23.125
N-BK7
N-SF5
ALP0106
30.0
8.0
18.88
-12.882
-36.22
2.7
1
28.277
N-BK7
N-SF5
ALP0107
20.0
10.0
12.3
-9.02
-25.23
3.6
1
17.625
N-BK7
N-SF5
ALP0201
25.0
12.0
15.346
-11.35
-31.92
4.2
1.3
22.286
N-BK7
N-SF5
ALP0202
25.0
12.7
15.596
-11.402
-31.05
4.3
1.3
22.251
N-BK7
N-SF5
ALP0203
30.0
12.7
18.535
-13.49
-37.84
4
1.3
27.36
N-BK7
N-SF5
ALP0204
40.0
12.7
25.23
-17.539
-48.75
3.4
1.3
37.778
N-BK7
N-SF5
ALP0205
50.0
12.7
31.26
-21.93
-62.37
3.1
1.3
47.992
N-BK7
N-SF5
ALP0206
60.0
12.7
37.33
-26.42
-75.86
2.8
1.3
58.127
N-BK7
N-SF5
ALP0207
75.0
12.7
46.77
-32.96
-94.62
2.6
1.3
73.227
N-BK7
N-SF5
ALP0208
65.0
20.0
40.09
-29.58
-83.59
6.3
2
60.868
N-BK7
N-SF5
ALP0301
60.0
25.4
37.33
-27.16
-75.86
7
2
55.565
N-BK7
N-SF5
ALP0302
120.0
25.4
73.28
-54.33
-159.96
4.2
2
117.103
N-BK7
N-SF5

   PDF to download