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Achromatic Lenses

issue date:2016-3-31 15:35:44 visit frequency:2384

Achromatic Lenses

An achromatic lens or achromat is a lens that is designed to limit the effects of chromatic and spherical aberration. Achromatic lenses are corrected to bring two wavelengths (typically red and blue) into focus in the same plane.

 

The most common type of achromat is the achromatic doublet, which is composed of two individual lenses made from glasses with different amounts of dispersion. Typically, one element is a negative (concave) element made out of flint glass such as F2, which has relatively high dispersion, and the other is a positive (convex) element made of crown glass such as BK7, which has lower dispersion. The lens elements are mounted next to each other, often cemented together, and shaped so that the chromatic aberration of one is counterbalanced by that of the other.

 

Achromatic Lenses are used to minimize or eliminate chromatic aberration. The achromatic design also helps minimize spherical aberrations. Achromatic Lenses are ideal for a range of applications, including fluorescence microscopy, image relay, inspection, or spectroscopy. XF Photonics Co.,Ltd  provide a large variety kinds of specifications according to clients’ request or Personalized customization for Achromatic Lenses. Our Achromatic Lenses are available in a range of coating or substrate options. Anti-reflection coatings range from the Ultraviolet (UV) to the Infrared (IR).


Achromatic Lenses

General precision

High precision

Material

According to different designs

Diameter

2 to 200mm or customize

Dimension tolerance

+0.0,-0.2mm

+0.0, -0.01mm

tc tolerance

±0.2mm

±0.02mm

Clear aperture

>85%

>95%

Surface quality

60-40

20-10

Flatness

<1.5λ@632.8nm

<λ/4 @632.8nm

Centration

3 arc min

30 arc sec

Coating

Uncoated,AR,HR,PR Coating,etc

ROHS

Compliant



The followings are available in stocks or customize per request specification:


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

ACL201

-25.0

12.7

-15.6

13.09

44.16

3.0

2.67

-27.5

N-BK7

F2

ACL201

-40.0

12.7

-24.45

17.97

66.6

3.0

2.34

-42.5

N-BK7

F2

ACL203

-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 c1(mm)

fb(mm)

Lens A

Lens B

ACL101

15.0

6.0

8.831

-6.546

-19.77

2.71

1

13.066

N-BK7

N-SF5

ACL102

20.0

6.0

12.356

-8.511

-24.38

2.6

1

18.288

N-BK7

N-SF5

ACL103

25.0

6.0

15.704

-10.666

-29.99

2.3

1

23.455

N-BK7

N-SF5

ACL104

30.0

6.0

18.88

-12.942

-36.48

1.9

1

28.695

N-BK7

N-SF5

ACL105

25.0

8.0

15.596

-10.814

-30.48

2.9

1

23.125

N-BK7

N-SF5

ACL106

30.0

8.0

18.88

-12.882

-36.22

2.7

1

28.277

N-BK7

N-SF5

ACL107

20.0

10.0

12.3

-9.02

-25.23

3.6

1

17.625

N-BK7

N-SF5

ACL108

25.0

12.0

15.346

-11.35

-31.92

4.2

1.3

22.286

N-BK7

N-SF5

ACL109

25.0

12.7

15.596

-11.402

-31.05

4.3

1.3

22.251

N-BK7

N-SF5

ACL110

30.0

12.7

18.535

-13.49

-37.84

4

1.3

27.36

N-BK7

N-SF5

ACL111

40.0

12.7

25.23

-17.539

-48.75

3.4

1.3

37.778

N-BK7

N-SF5

ACL112

50.0

12.7

31.26

-21.93

-62.37

3.1

1.3

47.992

N-BK7

N-SF5

ACL113

60.0

12.7

37.33

-26.42

-75.86

2.8

1.3

58.127

N-BK7

N-SF5

ACL113

75.0

12.7

46.77

-32.96

-94.62

2.6

1.3

73.227

N-BK7

N-SF5

ACL114

65.0

20.0

40.09

-29.58

-83.59

6.3

2

60.868

N-BK7

N-SF5

ACL115

60.0

25.4

37.33

-27.16

-75.86

7

2

55.565

N-BK7

N-SF5

ACL116

120.0

25.4

73.28

-54.33

-159.96

4.2

2

117.103

N-BK7

N-SF5