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See all 25 Products in Family

TECHSPEC^® components are designed, specified, or manufactured by Edmund Optics. Learn More
25mm Dia x -50mm FL Negative Doublet Lens MgF₂ Coated

Stock #45-221

S$149.60

Qty 1-5
S$149.60

Qty 6
S$119.68

Volume Pricing
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Code V Curves eDrawings: eprt IGES ISO PDF Drawings Specsheets STEP: stp Zemax: zmx

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Diameter (mm):

25.00 +0.0/-0.025

Effective Focal Length EFL (mm):

-50.00

Focal Length Tolerance (%):

±2

Back Focal Length BFL (mm):

-53.33

Focal Length Specification Wavelength (nm):

587.6

Clear Aperture CA (mm):

24.00

Centering (arcmin):

Center Thickness CT 1 (mm):

2.50

Center Thickness CT 2 (mm):

4.06

Center Thickness Tolerance (mm):

±0.2

Radius R₁ (mm):

-35.51

Radius R₂ (mm):

24.58

Radius R₃ (mm):

217.99

Edge Thickness ET (mm):

9.06

Substrate:

N-BAF10 / N-SF10

Surface Quality:

40-20

f/#:

2.00

Numerical Aperture NA:

0.25

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 201:

Compliant

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.