Double Concave Lens

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

λ/2~λ/10@632.8nm，532nm

Clear Aperture

>85% dig diameter

Centration

<3arc min~ 30arc sec</span>

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

1.25

-9.8

H-ZF7LA

11

-11.9

-11.9

2

-7.1

H-K9L

12

-25.1

-25.1

1.26

-24

BAF3

12

-19.5

-47.1

2

-23.4

ZF11

12

-12.6

-12.6

3

-7.4

H-K9L

12.5

-103

-103

1.5

-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

13.5

-34.7

-79.6

1.5

-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

1.5

-27

H-K9L

14

-27.9

-32.2

2

-19

H-ZF6

15

-23

-27.7

2.8

-16.4

H-ZF6

15

-27.5

-23.6

7.23

-16.4

H-F3

15

-50.5

-11.3

1.5

-14.8

N-SF6

15

-13.2

-12.1

2

-7.4

H-ZF3

16

-30.6

-15.8

3

-14.6