CAY046 is the most popular bi-aspheric plastic laser collimating lens which is nearly the diffraction limited. CAY046 is designed specifically for use as a collimator in combination with a diode laser. CAY046 is designed for making a more fine dot at short distance. The focus is very close. Parameters

Lens Material : Acrylic
Lens Diameter : φ7.4 mm
Edge Thickness : 3.05 mm
Clear Aperture (CA) : φ3.7 mm
Numerical Aperture (NA) : 0.40
Effective Focal Length (EFL) : 4.60 mm(with BK7 t=0.25mm cover glass)
Back Focal Length (BFL) : 3.08 mm
Axis Wave Front Error (RMS) : 0.040 λ
Field Radius : 0.1 mm
Transmission(%) : 90%
Storage Temperature : -25 to 70 ℃
Operating Temperature : 5 to 65 ℃