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

20mm Dia. x 50mm FL, MgF₂ Coated, Inked, Achromatic Doublet Lens

Name: 20mm Dia. x 50mm FL, MgF 2 Coated, Inked, Achromatic Doublet Lens
Brand: TECHSPEC
SKU: 49-933-INK
Price: ₹9,135

MgF₂ Coated Achromatic Lenses

Stock #49-933-INK 10 to 12 days Other Coating Options

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₹9,135

Qty 1-5
₹9,135

Qty 6+
₹7,308

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Diameter (mm):

20.00 ±0.025

Effective Focal Length EFL (mm):

50.00

Focal Length Tolerance (%):

±1

Back Focal Length BFL (mm):

46.93

Focal Length Specification Wavelength (nm):

587.6

Clear Aperture CA (mm):

19.00

Centering (arcmin):

Center Thickness CT (mm):

6.80 ±0.20

Center Thickness CT 1 (mm):

4.80 ±0.10

Center Thickness CT 2 (mm):

2.00 ±0.10

Radius R₁ (mm):

36.92

Radius R₂ (mm):

-25.65

Radius R₃ (mm):

-77.89

Edge Thickness ET (mm):

4.78

N-SSK8 / SF56

Surface Quality:

40-20

f/#:

2.5

Numerical Aperture NA:

0.20

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:

Achromatic Lens

Wavelength Range (nm):

400 - 700

Regulatory Compliance

RoHS:

Compliant

Certificate of Conformance:

View

Product Family Description

Designed for 0° Angle of Incidence
Less Than 1.75% Reflectance Per Surface @ 400 - 700nm
VIS 0° and VIS-NIR Coated Achromats Also Available

TECHSPEC ® MgF2 Coated Achromatic Lenses consist of two optical components cemented together to form an achromatic doublet which is computer optimized to correct for on-axis spherical and chromatic aberrations. These lenses feature a single layer of MgF2 which provides less than 1.75% reflectivity from 400 – 700nm. TECHSPEC MgF2 Coated Achromatic Lenses are best for applications involving multi-color (white light) imaging due to their specific doublet lens pairing that enables them to correct the color separation inherent in glass. Having eliminated the problematic chromatic aberrations, achromatic doublet lenses become the most cost-efficient means for polychromatic illumination and imaging.