K9 Double Concave Lens, Optical Lens, Concave Lens

K9 Double Concave Lens, Optical Lens, Concave Lens

Aperture: >90%ø
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Product Details

K9 double concave lens

   Materials: K9 The essence of annealing 

   Focal length: ±2%@587.6nm

   Diameter Tolerance: +0.0/-0.20

   Center Thickness: ±0.1

   Center deviation: 3

   Diaphragm: 1~5

   Irregularity: 0.2~0.5

   Clearing: IV stand

   Coating: MgF2 antireflection film

   Aperture: 90%ø

KSA-412-K9-Double-concave-lens-Optical-lens-Concave-lens-dia-50-8mm-f-250-0mm.jpg

 f'=Focal length  fb=Back focal length  Tc=Thickness of center   Te=Thickness of edge

Model

φ

R

f' 

fb 

Tc 

Te 

Weight(g) 

KSA-401 

6.0

10.5

-9.8

-10.4

2.0

2.9

1

 KSA-424 

10.0

15.951

-15.1

-15.8

2.0

3.6

1

 KSA-423 

10.0

31.347

-30.0

-30.7

2.0

2.8

1

 KSA-402 

12.7

19.975

-19.0

-19.7

2.0

4.2

1

 KSA-403 

12.7

26.592

-25.4

-26

2.0

3.6

1

 KSA-404 

12.7

39.72

-38.1

-38.8

2.0

3.0

1

 KSA-422 

20.0

31.48

-30.0

-30.8

2.7

6.0

3

 KSA-421 

20.0

41.833

-40.0

-40.9

2.7

5.1

3

 KSA-420 

20.0

62.476

-60.0

-61.2

2.7

4.3

3

 KSA-405 

25.4

53.022

-50.8

-51.8

3.0

6.2

6

 KSA-406 

25.4

78.032

-75.0

-76.3

3.0

5.1

6

 KSA-407 

25.4

103.869

-100.0

-101.7

3.0

4.6

6

 KSA-408 

25.4

156.126

-150.0

-150.9

3.0

4.1

6

 KSA-419 

30.0

62.657

-60.0

-61.3

3.5

7.1

7

 KSA-418 

30.0

186.641

-180.0

-181.1

3.5

4.7

7

 KSA-417 

30.0

258.993

-250.0

-251.3

3.5

4.4

7

 KSA-416 

40.0

104.055

-100.0

-101.4

4.0

7.9

19

 KSA-415 

40.0

155.72

-150.0

-151.4

4.0

6.6

18

 KSA-412 

50.8

259.248

-250.0

-251.5

5.0

7.5

29

 KSA-413 

50.8

414.87

-400.0

-401.6

5.0

6.6

29

 KSA-414 

50.8

517.647

-500.0

-501.7

5.0

6.3

29



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