Name: 50mm Dia. x 250mm FL YAG-BBAR Coated, Double-Convex Lens
Brand: TECHSPEC
SKU: 89-293
Price: A$114.40

Diameter (mm):

50.00 +0.0/-0.025

Back Focal Length BFL (mm):

248.37

Effective Focal Length EFL (mm):

250.00

Coating:

YAG-BBAR (500-1100nm)

Coating Specification:

R_abs <0.25% @ 532nm
R_abs <0.25% @ 1064nm
R_avg <1.0% @ 500 - 1100nm

N-BK7

Surface Quality:

40-20

Power (P-V) @ 632.8nm:

1.5λ

Irregularity (P-V) @ 632.8nm:

λ/4

Centering (arcmin):

Bevel:

Protective bevel as needed

Center Thickness CT (mm):

4.93

Center Thickness Tolerance (mm):

±0.10

Edge Thickness ET (mm):

2.5

Radius R₁=-R₂ (mm):

257.57

Clear Aperture CA (mm):

49.00

f/#:

5.00

Focal Length Specification Wavelength (nm):

587.6

Focal Length Tolerance (%):

±1

Numerical Aperture NA:

0.10

Type:

Double-Convex Lens

Typical Energy Density Limit:

5 J/cm² @ 532nm, 10ns

Wavelength Range (nm):

350 - 2200

Regulatory Compliance

RoHS 2015:

Compliant

Reach 219:

Compliant

Product Family Description

Optimized for R<0.25% @ 532nm and 1064nm
Minimize Aberrations Including Spherical and Coma
UV Fused Silica DCX Lenses Available
Other Coating Options Available: Uncoated, MgF₂, VIS 0°, NIR I, NIR II, VIS-EXT, and VIS-NIR

TECHSPEC® YAG-BBAR Coated Double-Convex (DCX) Lenses, also referred to as bi-convex lenses, have two positive, symmetrical faces with equal radii on both sides. These lenses are generally recommended for finite imaging applications with a conjugate ratio (ratio between object distance and image distance) between 0.2 and 5. At a conjugate ratio of 1, aberrations such as spherical aberration, chromatic aberration, coma, and distortion are minimized or cancelled due to the symmetric lens design. TECHSPEC YAG-BBAR Coated Double-Convex Lenses are available in a variety of substrates and coating options for the visible and NIR spectra.

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