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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:

 

Material

BK7 grade A optical glass

Design Wavelength

480.0nm,546.1nm,643.8 nm

Diameter Tolerance

+0.0, -0.15 mm

Thickness Tolerance

±0.2 mm

Paraxial Focal Length

±2% @546.1 nm

Centration

<3 arc minutes

Clear Aperture

>85%

Surface Irregularity

λ/4@632.8 nm

Surface Quality

60-40 scratch and dig

Protective Bevel

0.25 mm x 45°

 

Positive Achromatic Lens Standard Products:

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

DIT71

10.0

6.0

6.546

-4.055

-23.23

3.6

0.8

7.54

SK9

SF15

DIT72

20.0

10.0

12.32

-0.902

-25.23

3.8

1.0

17.625

BK7

SF5

DIT73

30.0

12.7

18.535

-13.49

-37.84

4.0

1.3

27.36

BK7

SF5

DIT74

40.0

12.7

25.23

-17.539

-48.75

3.4

1.3

37.778

BK7

SF5

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:

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

DIT76

-25

12.7

-15.6

13.09

44.16

3.0

2.67

-27.5

BK7

F2

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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