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Details |
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Achromat Lenses
Achromatic doublet lenses have significantly better optical performance than singlet lenses in visible imaging and laser beam manipulation applications. Achromatic Lenses are consist of two elements, usually of a positive low-index crown glass cemented to a negative high-index flint glass that have been corrected for chromatic aberration with respect to two or more selected wavelengths. We provide 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 480.0nm, 546.1nm and 643.8nm.
Application:
Projection Optics System
Imaging Optics System
Laser Measurements System
Specification:
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Material |
BK7 grade A optical glass |
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Design Wavelength |
480.0nm,546.1nm,643.8 nm |
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Diameter Tolerance |
+0.0, -0.15 mm |
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Thickness Tolerance |
±0.2 mm |
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Paraxial Focal Length |
±2% @546.1 nm |
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Centration |
<3 arc minutes |
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Clear Aperture |
>85% |
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Surface Irregularity |
λ/4@632.8 nm |
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Surface Quality |
60-40 scratch and dig |
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Protective Bevel |
0.25 mm x 45° |
Positive Achromatic Lens Standard Products:
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Part No. |
f (mm) |
Ф (mm) |
R1 (mm) |
R2=R3 (mm) |
R4 (mm) |
tc1
(mm) |
t c2
(mm) |
f b
(mm) |
Lens
A |
Lens B |
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DIT71 |
10.0 |
6.0 |
6.546 |
-4.055 |
-23.23 |
3.6 |
0.8 |
7.54 |
SK9 |
SF15 |
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DIT72 |
20.0 |
10.0 |
12.32 |
-0.902 |
-25.23 |
3.8 |
1.0 |
17.625 |
BK7 |
SF5 |
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DIT73 |
30.0 |
12.7 |
18.535 |
-13.49 |
-37.84 |
4.0 |
1.3 |
27.36 |
BK7 |
SF5 |
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DIT74 |
40.0 |
12.7 |
25.23 |
-17.539 |
-48.75 |
3.4 |
1.3 |
37.778 |
BK7 |
SF5 |
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TDI75 |
50.0 |
18.0 |
31.69 |
-22.0 |
-60.57 |
4.8 |
1.5 |
46.987 |
BK7 |
SF5 |
Note: Other size, material and coating are available upon request.
Negative Achromatic Lens Standard Products:
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Part No. |
f (mm) |
Ф (mm) |
R1 (mm) |
R2=R3 (mm) |
R4 (mm) |
tc1
(mm) |
t c2
(mm) |
f b
(mm) |
Lens
A |
Lens B |
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DIT76 |
-25 |
12.7 |
-15.6 |
13.09 |
44.16 |
3.0 |
2.67 |
-27.5 |
BK7 |
F2 |
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DIT77 |
-40 |
12.7 |
-24.45 |
17.97 |
66.6 |
3.0 |
2.34 |
-42.5 |
BK7 |
F2 |
Note: Other size, material and coating are available upon request. |
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