.

Double Concave Lens

A double concave lens/double concave mirrorhas a negative focal length, thereby causing collimated incident light to diverge. The double concave lens/mirror has an equal radius of curvature on both sides of the lens. They are generally used to expand light or increase focal length in the existing system, such as beam expander and projection systems.

Description Of Double Concave Lens/Mirror

The double concave lens of Ecoptik has a negative focal length, thereby causing collimated incident light to diverge. A double concave lens has an equal radius of curvature on both sides of the lens.

Specifications Of Double Concave Lens/Mirror

Material

Optical glass/ Fused silica/ sapphire etc.

Diameter

2mm~300mm

Diameter tolerance

±0.05mm(≤50mm)

±0.1mm(>50mm)

Focal length

-50mm~-2000mm

Focal length tolerance

±0.2%(<10mm)

±0.5%(<10mm-1000mm)

±1%(<>1000mm)

Center Thickness

2mm~20mm

Surface quality

60/40, 40/20, 20/10

Surface accuracy

Clear Aperture

>85% dig diameter

Centration

<3arc min~ 30arc sec

Coating

As per customer’s request

Material

Diameter (mm)

Surface Radius 1 (mm)

Surface Radius 2 (mm)

Center Thickness (mm)

Focal Length (mm)

H-ZK3

5

-14.4

-14.4

3

-9.8

H-ZF6

8

-7.2

-30.5

5

-7.4

H-K9L

10

-11.1

-11.1

2

-10.4

JGS1

10

-9.25

-9.25

-9.8

H-ZF7LA

11

-11.9

-11.9

2

-7.1

H-K9L

12

-25.1

-25.1

-24

BAF3

12

-19.5

-47.1

2

-23.4

ZF11

12

-12.6

-12.6

3

-7.4

H-K9L

-103

-103

-98.9

H-ZF6

13

-30.6

-154

3

-33.5

H-LAK7

13

-48.9

-27.7

2

-24.4

H-ZK2

13

-12.1

-15.7

1

-11.3

H-ZF6

-34.7

-79.6

-31.6

H-ZF2

14

-36.2

-192

3

-45

H-ZF6

14

-34.7

-79.6

3

-31.6

H-LAK53A

14

-31.7

-58.8

-27

H-K9L

14

-27.9

-32.2

2

-19

H-ZF6

15

-23

-27.7

-16.4

H-ZF6

15

-27.5

-23.6

-16.4

H-F3

15

-50.5

-11.3

-14.8

N-SF6

15

-13.2

-12.1

2

-7.4

H-ZF3

16

-30.6

-15.8

3

-14.6

H-LAF50B

-16.8

-17.8

-11

H-LAF50B

-37.2

-37.2

3

-23.9

H-K9L

20

-299

-85.4

2

-128

H-ZF52A

20

-51.6

-21

-16.7

H-ZF6

21

-77.4

-77.4

-51

H-ZF7LA

21

-42.6

-184

-42.8

H-ZF7LA

22

-255

-16.2

9

-18.7

H-K9L

24

-11.1

-90

1

-18.9

JGS1

25

-92.1

-92.1

-100

H-K9L

25

-52.1

-52.1

-50

H-LAF4

25

-38.4

-38.4

-25.4

H-F4

25

-36.7

-29.2

3

-25

ZK9

27

-149

-52.9

-62.7

H-ZK21

-281

-23.8

3

-35

BaK2

-2249

-80.2

2

-143

JGS1

30

-71

-71

3

-77

BaK2

-2249

-76.4

2

-137

H-ZF3

32

-11.8

-284

2

-15.7

ZF1

41

-692

-170

-211

ZF7L

44

-153

-49

3

-45.8

ZF4

54

-340

-249

-197

H-ZF3

58

-73.8

-234

4

-77.8

F4

60

-74.9

-78.4

1

-61.3

ZF1

65

-516

-163

-190

ZBaF3

65

-296

-52.4

-67.5

H-ZF2

68

-83.5

-249

-92.3

F13

68

-2465

-41.8

3

-65.6

H-F4

72

-170

-71.8

12

-80

H-K9L

90

-102

-347

6

-15

2

Ecoptikis a professional optical components companies, we provide custom optical components, dome flangeand etc. Want to know more? Please contact us.



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