Laser Diode Collimator Lens-Anteryon AC256,10PCS (NA:0.51,EFL:4.34 mm)

• AC256 is the Hybrid Aspherical Polymer on Glass lens, which is diffraction limited and have low wave front aberration.
• Very high numerical apertures (NA=0.51)
• AC256 is the ideal choice for collimating or focusing the light of a laser diode.

Parameters <br> <br> Lens Material : Hybrid aspherical polymer on glass lens <br> Lens Diameter : φ5.5 mm <br> Center Thickness : 3.7 mm <br> Edge Thickness : 2.41 mm <br> Design Wavelength : 650 nm <br> Clear Aperture (CA) : φ4.4 mm <br> Numerical Aperture (NA) : 0.51 <br> Effective Focal Length (EFL): 4.34 mm (with BK7 t=0.25mm cover glass) <br> Back Focal Length (BFL) : 2.33 mm <br> Axis Wave front Error (RMS) : 0.05 λ <br> Field Radius : ≧0.09 mm <br> Transmittance : 97% <br> Storage Temperature : -40 to 85 ℃ <br> Operating Temperature : -30 to 85 ℃ <br>