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Achromatic Lens

Achromatic Lens is an achromatic consists of a positive low-index Crown Glass lens element cemented to a negative high-index Flint Glass lens element. The elements are chosen so as to cancel chromatic aberration at two well-separated wavelengths, usually in the blue and red region of the spectrum. Focal length is constant at those two wavelengths and focal length shifts are virtually eliminated across the visible wavelengths. One frequent use is to achieve diffraction limited focusing of a laser beam. Negative Achromats are typically used when there is a need to eliminate chromatic aberration. In addition to reducing chromatic aberration at the design wavelengths, spherical aberration and coma are greatly reduced.

TEMTO can provide Positive Achromatic Lens and Negative Achromatic Lens by two piece single lens (Doublet) or three piece single lens (Triplet).

Applications:

Projection Optics System
Imaging Optics Systems
Laser Measurements Systems

Positive Achromatic Lens
Negative Achromatic Lens

 
Specifications:
Material All optical glass per your requirements
Design Wavelength 480.0nm, 546.1nm, 643.8nm
Diameter Tolerance +0.00/-0.15mm
Paraxial Focus Length 2% @546.1nm
Centration
<3 arc minutes
Clear Aperture >Central 85% of diameter
Surface Figure /4@632.8nm
Surface Quality 60-40 S/D
Coating Single layer MgF2 broadband AR coating
Protective Bevel <0.25mm x 45

Positive Achromatic Lens Standard Products:

Part No.

f(mm)

(mm)

R1
(mm)

R2=R3(mm)

R4(mm)

tc1(mm)

tc2(mm)

fb(mm)

Lens
A

Lens B

LCA1101

10

6.0

6.750

-4.040

-23.390

3.69

0.72

7.6

SSK4A

SF8

LCA1102

15

6.0

9.120

-5.860

-20.990

2.71

1.20

13.1

BK7

F2

LCA1103

30

6.0

16.030

-13.090

-67.61

1.40

0.60

28.8

BK7

F2

LCA1104

25

8.0

16.530

-10.880

-39.80

2.63

2.50

22.6

SK11

SF5

LCA1105

30

8.0

20.430

-12.780

-75.97

3.07

1.43

27.6

SSK4A

SF8

LCA1106

20

10.0

13.090

-9.120

-34.28

5.56

1.80

16.5

BaK1

SF8

LCA1201

25

12.0

15.040

-12.480

-33.100

3.76

2.00

22.2

BaLKN3

SF15

LCA1202

25

12.7

16.410

-12.020

-40.74

3.76

2.00

22.2

BaK4

SF15

LCA1203

30

12.7

19.140

-14.030

-55.21

3.93

1.68

27.0

BaK1

SF8

LCA1204

40

12.7

21.280

-17.000

-89.95

3.00

0.80

37.8

BK7

F2

LCA1205

75

12.7

39.99

-31.990

-167.90

2.40

1.00

73.0

BK7

F2

LCA1209

40

18.0

25.760

-19.010

-73.79

5.64

2.50

35.9

BaK1

SF8

LCA1302

50

25.4

34.510

-21.980

-213.80

9.00

2.50

43.3

BaF10

SF10

LCA1303

60

25.4

37.67

-28.580

-72.78

10.00

2.81

53.5

BK6

SF10

LCA1304

80

25.4

42.46

-33.880

-183.65

5.80

2.60

75.1

BK7

F2

LCA1305

100

25.4

52.79

-42.46

-228.60

4.50

2.00

96.0

BK7

F2

LCA1306

120

25.4

73.28

-54.33

-159.96

4.20

2.00

117.103

BK7

SF5

LCA1309

125

25.4

76.421

-56.658

-166.815

4.38

2.09

121.925

BK7

SF5

LCA1308

140

30.0

93.22

-59.14

-156.67

6.52

2.51

136.0

BK7

SF5


Negative Achromatic Lens Standard Products:

Part No.

f(mm)

(mm)

R1
(mm)

R2=R3(mm)

R4(mm)

tc1(mm)

tc2(mm)

fb(mm)

Lens
A

Lens B

LCA0201

-25

12.7

-15.600

13.090

44.16

3.00

2.67

-27.5

BK7

F2

LCA0202

-40

12.7

-24.450

17.970

66.60

3.00

2.34

-42.5

BK7

F2

LCA0301

-50

25.4

-31.190

24.890

85.31

3.00

4.22

-53.3

BK7

F2

Note: Cutting Lens, Square Lens, Rectangle Lens and Coatings are available upon request.  Metal Mount is also available upon request.

The general tolerance specifications above provide a guideline regarding manufacturing capabilities for optics ranging in size from diameter 3-130mm. The manufacturing limits are not absolute; tighter tolerances may be possible. Part specific tolerances may vary depending on component size, shape, and/or material.

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