Since aspheric lenses are corrected for spherical and coma aberrations, they are ideally suited for low f-number and high throughput application, condenser quality aspheres are primarily used in high efficiency illumination systems.
Paralight Optics offers CNC precision-polished large-diameter aspherical lenses, with and without anti-reflection (AR) coatings. These lenses are available in larger sizes, provide better surface quality, and maintain the M squared values of the input beam better than their molded aspheric lens counterparts. Since the surface of an aspheric lens is designed to eliminate spherical aberration, they are often employed to collimate light exiting a fiber or laser diode. We also offer acylindrical lenses, which provides the advantages of aspheres in one-dimensional focusing applications.
CNC Precision Polish Enables High Optical Performance
In Process Metrology for All CNC Polished Aspheres
Non-Contact Interferometric and Non-Marring Profilometer Measurements
Ideally Suited for Low F-Number and High throughput Application. Condenser Quality Aspheres are Primarily Used in High Efficiency Illumination Systems.
Substrate Material
N-BK7 (CDGM H-K9L), ZnSe or others
Type
Aspheric Lens
Diameter
10 - 50 mm
Diameter Tolerance
+0.00/-0.50 mm
Center Thickness Tolerance
+/-0.50 mm
Bevel
0.50 mm x 45°
Focal Length Tolerance
± 7 %
Centration
< 30 arcmin
Surface Quality (Scratch-Dig)
80 - 60
Clear Aperture
≥ 90% of Diameter
Coating Range
Uncoated or specify your coating
Design Wavelength
587.6 nm
Laser Damage Threshold (Pulsed)
7.5 J/cm2 (10ns,10Hz,@532nm)
♦ Positive Radius Indicates that the Center of Curvature is to the Right of the Lens
♦ Negative Radius Indicates that the Center of Curvature is to the Left of the Lens
Aspheric Lens Equation:
Where:
Z = Sag(Surface Profile)
Y = Radial Distance from Optical Axis
R = Radius of Curvature
K = Conic Constant
A4 = 4th Order Aspheric Coefficient
A6 = 6th Order Aspheric Coefficient
An = nth Order Aspheric Coefficient