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Bi - Concave  Lens

Text Box: Specification :
Design Wavelength : 587nm
Clear Aperture : ≥85%

Diameter	Surface		Diameter	Centering		               Quality		Tolerance	Tolerance
5 – 25		60 – 40		±0.10		± 5 arc min
25 – 40		60 – 40		±0.10		± 5 arc min
40 – 75		60 – 40		±0.10		± 5 arc min

Note: Special material and size are available upon request. AR coating  available on request.

Kindly contact us for  custom optics

These lenses are symmetrical with equal radii on both sides. The biconcave lenses are often used to expand light beams or to increase focal lengths in optical systems, and are normally used in combination with other lenses.

*     have negative focal lengths diverge collimated incident light

*     form only virtual images which are seen through the lens

· minimize spherical aberration, coma and distortion .

Our standard products given below.

Dia. (mm)

Refractive Index

Center Thickness

Edge Thickness

EFL

BFL

6

1.5168

1

1.9755

-9.0

-9.3238

9

1.5168

1.5

2.5896

-18.0

-18.4879

12

1.5168

2.0

3.4528

-24.0

-24.6505

25

1.5168

2.5

5.5433

-50.0

-50.8174

25

1.5168

5

6.5049

-100.0

-101.634

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Nirmal Optronics

Plot # 26,27/Flat A2 - "Shree Enclave",
Car Nagar,
Behind Reliance Fresh on MPM St.
Subramani Nagar Main Road, Perambur
City: Chennai
State: Tamil Nadu
Country: India
Fax No: +91-44-25581282
Phone No: +91-44-25581282
Mobile No: +919003039922

 

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