Aspherical lens element KPA series

glassprecisionoptical

Our uncoated precision polished aspheric lenses are computer-optimized to achieve diffraction limited optical performance over high numerical apertures without requiring multiple elements. This may be used to reduce weight, complexity and cost for optical systems. •Uncoated L-BAL 35 (589/611) substrates •Computer optimized to provide diffraction limited performance •Low f-numbers for optimal light gathering and focusing •Reduces spherical aberrations Advantage of Aspheric Lenses In applications that require large acceptance angles, such as light gathering for illumination, spherical lenses are unsuitable due to spherical aberration, or the effect of refractive power of a spherical surface becoming greater with increasing aperture. Aspheric lenses maintain constant focal length or very high NA, avoiding the need for multiple elements to correct spherical aberration. This simplifies system design by reducing weight and component count. It also results in less transmission loss, and less ghosting due to having fewer surfaces. The primary drawback of aspheric lenses is off-axis performance is poor. This is not a problem for coupling to and from optical fibers or collimating light sources, but aspheric lenses are not usable over a wide field of view. Efficiently Focus or Collect Light Our Precision Aspheric Lenses have diffraction limited performance on axis, and are available in a range of high numerical apertures. They are ideal for applications such as coupling light into and out of optical fibers, efficiently collecting output from optical sources, or focusing beams onto small high speed detectors.