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TECHSPEC^® components are designed, specified, or manufactured by Edmund Optics. Learn More

9mm Dia x -25mm FL Negative Doublet Lens MgF₂ Coated

Name: 9mm Dia x -25mm FL Negative Doublet Lens MgF 2 Coated
Brand: TECHSPEC
SKU: 45-828
Price: ₹6,177

Stock #45-828 10 to 12 days Other Coating Options

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₹3,089 ~~₹6,177~~

Qty 1-5
₹3,089 ~~₹6,177~~

Qty 6+
₹2,469 ~~₹4,937~~

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Specifications
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Diameter (mm):

9.00 +0.0/-0.025

Effective Focal Length EFL (mm):

-25.00

Focal Length Tolerance (%):

±1

Back Focal Length BFL (mm):

-27.33

Focal Length Specification Wavelength (nm):

587.6

Clear Aperture CA (mm):

8.1

Centering (arcmin):

Center Thickness CT (mm):

4.55 ±0.10

Center Thickness CT 1 (mm):

2.00 ±0.05

Center Thickness CT 2 (mm):

2.55 ±0.05

Radius R₁ (mm):

-17.75

Radius R₂ (mm):

12.17

Radius R₃ (mm):

109.75

Edge Thickness ET (mm):

5.13

N-BAF10 / N-SF10

Surface Quality:

40-20

f/#:

2.78

Numerical Aperture NA:

0.18

Coating:

MgF₂ (400-700nm)

Coating Specification:

R_avg ≤1.75% @ 400 - 700nm

Power (P-V) @ 632.8nm:

1.5λ

Irregularity (P-V) @ 632.8nm:

λ/4

Bevel:

Protective bevel as needed

Type:

Negative Achromatic Lens

Wavelength Range (nm):

400 - 700

Regulatory Compliance

RoHS 2015:

Compliant

Reach 211:

Compliant

Certificate of Conformance:

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Product Family Description

Magnesium Fluoride (MgF₂) Coating
Used to Extend Focal Length
Broadband AR Coated Negative Achromatic Lenses Also Available

TECHSPEC® MgF₂ Coated Negative Achromatic Lenses consist of two optical elements cemented together. Negative doublet lenses are corrected for color and on-axis aberrations. TECHSPEC MgF₂ Coated Negative Achromatic Lenses are used predominantly as Barlow lenses to extend focal lengths. These lenses are often combined with positive achromatic mirror systems and imaging lenses.