25mm Dia., 0.25 NA, Uncoated 1550nm NIR Aspheric Lens

Diameter (mm):

25.00 +0.0/-0.025

Effective Focal Length EFL (mm):

50.00 @ 1550nm

Numerical Aperture NA:

0.25

Back Focal Length BFL (mm):

42.65 @ 587.6nm

Center Thickness CT (mm):

8.50 ±0.1

Coating:

Uncoated

N-SF6

Clear Aperture CA (mm):

22.5

Asphere Figure Error (μm RMS):

0.25

Surface Quality:

40-20

Edge Thickness ET (mm):

6.43

Centering (arcmin):

<2.5

Bevel:

Protective bevel as needed

f/#:

Design Wavelength DWL (nm):

1550

Shape of Back Surface:

Plano

Conjugate Distance:

Infinite

Regulatory Compliance

RoHS:

Compliant

Product Family Description

Designed at 1550nm
0.25µm RMS Aspheric Figure Error
Ideal for Eye-Safe Laser Applications

TECHSPEC® 1550nm High Precision Near-Infrared (NIR) Aspheric Lenses are designed at 1550nm to eliminate spherical aberration in the near-infrared. 1550nm lasers are commonly used in telecom, LiDAR, and other applications requiring eye-safe design features. Manufactured from S-TIH6 or N-SF6 substrates and polished through a computer numerical controlled (CNC) process, these aspheric lenses achieve high precision performance across the NIR spectrum. Featuring a 0.25µm RMS aspheric figure error, these lenses are ideal for applications that require spherical aberration correction, including imaging and laser focusing applications. TECHSPEC® 1550nm High Precision Near-Infrared (NIR) Aspheric Lenses are available with low numerical aperture designs for applications that require beam shape to be maintained as well as high numerical aperture designs for light-gathering applications. For custom designed CNC polished aspheric lenses, please contact us.