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Bi-Concave Lens

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           Biconcave lenses are manufactured with both surfaces concave. These lenses have negative focal lengths diverge collimated incident light and form virtual images which are seen through the lens. They are often used to expand light or increase focal lengths in existing systems.

 

Specifications:

Material:

BK7   or UV fused silica etc.

Focal   Length Tolerance:

±1% @589nm

Design   Wavelength:

589nm

Centration:

≤3′

Diameter   Tolerance:

+0/-0.1mm

Clear   Aperture:

>central 90%  of  diameter

Center   Thickness Tolerance:

±0.1mm

Center   Thickness:

2.5mm,nominal

Surface   Quality:

20/10(UVFS)/ 40/20(BK7)

Surface   Accuracy:

≤ 1.5λ power,λ/2 irregularity(UVFS)

≤ 1.5λ power,λ/4 irregularity(BK7)

Chamfers:

0-0.8mm   face width×45°±15°



Notes:

1. Material, besides BK7, fused silica and any other   materials are available.

2. Surface Quality could reach 40-20 or 20-10

3. Centration such   as 1’, 30” is available.

4. Please show us the size and the coating specification.

Part No.

DIA(mm)

F(mm)

Tc(mm)

Material

INF-DCV-06-06

6.0

-6.0

1.5

SF11

INF-DCV-06-12

6.0

-12.0

2.0

SF11

INF-DCV-09-09

9.0

-9.0

2.0

SF11

INF-DCV-09-18

9.0

-18.0

2.5

SF11

INF-DCV-12-15

12.7

-15.0

3.0

SF11

INF-DCV-12-25

12.7

-25.0

2.5

BK7

INF-DCV-12-30

12.7

-30.0

3.0

BK7

INF-DCV-12-50

12.7

-50.0

3.5

BK7

INF-DCV-25-25

25.4

-25.0

3.0

SF11

INF-DCV-25-50

25.4

-50.0

3.0

BK7

INF-DCV-25-75

25.4

-75.0

3.5

BK7

INF-DCV-25-100

25.4

-100.0

4.0

BK7


Custom designs for other sizes and coatings are also available upon request.

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Tel: +86-(0)591 38206293
Fax: +86-(0)591 38206293
ADD: NO.30,WULONGJIANG AVENUE,HI-TECH ZONES,FUZHOU350109,P.R.CHINA
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