• Material: Optical-Grade Plastic
• Volume Price Available

This Thorlabs’ plastic Aspheric Lens utilizes the molding technology to produce all-plastic, near diffraction-limited optics. Designed by Philips for high-volume applications at affordable prices, this optic features standard aspheric lens performance. The surface of an aspheric lens is designed to eliminate spherical aberration, which allows for the spot size and collimation of a monochromatic beam of light to be diffraction limited.

In laser diode systems, difficulties with aberration correction are compounded by the beam's high divergence angle. Since individual spherical lenses can refract light at only small angles before spherical aberration is introduced, three or four elements are often required to collimate laser diode light. In contrast, a single aspheric lens collimates without introducing spherical aberration. When used to collimate light, the lens should be oriented so that the side with a larger radius of curvature faces the point source.

Conversely, when coupling into fiber, it is often necessary to focus the laser light to a diffraction limited spot. Single spherical elements are typically not capable of achieving such a small spot size. Spherical aberration is the limiting factor rather than the diffraction limit. Because the aspheric lenses are corrected to eliminate the spherical aberration, only diffraction limits the size of the focal spot. For focusing applications, the lens should be oriented so that the side with less curvature faces the source.

• Effective Focal Length: 10.00 mm
• Numerical Aperture: 0.200
• Clear Aperture: Ø4.1 mm
• Free Working Distance: 8.33 mm
• Outer Diameter: Ø6.28 mm
• Center Thickness: 1.50 mm
• RMS Wavefront Error (On Axis): 0.080?
• RMS Wavefront Error (Total): 0.090?
• Design Wavelength: 670 nm
• AR Coating Wavelength (>95% Transmission): None
• Laser Window Correction: 0.25 mm (BK7)
• Operating Temperature: -10 to 75 °C
• Storage Temperature: -25 to 100 °C