You can manage bookmarks using lists, please log in to your user account for this.
Media type:
E-Article
Title:
Micro Lens Array Milling on Large Wafers : More Design Freedom for Micro Optics — Aspheric Lenslets with Imaging Quality
:
More Design Freedom for Micro Optics — Aspheric Lenslets with Imaging Quality
Contributor:
Scheiding, Sebastian;
Gebhardt, Andreas;
Eberhardt, Ramona;
Tünnermann, Andreas
Description:
<jats:title>Abstract</jats:title><jats:p>Micro Lens Arrays (MLA) containing thousands of lenses with an aspheric shape and a precise position on large substrates are used in sensor devices directly or as master moulds for the low‐cost replication of micro lenses in an array. They have to fulfill the high requirements in wafer scale manufacturing of small optics. This high volume manufacturing method for low‐cost but effective micro optics relies on the sandwich‐like assembly of the sensors and optical components like lenses as well as mechanical components like apertures and spacers on wafer level. After joining all components the dicing results in a batch of wafer level cameras for the use in cellular phones or webcams.</jats:p><jats:p>Micro Lens Arrays are also a centrepiece of today's sensor products, either to raise the fill factor and collect more light on each pixel or to deflect the incoming beam to measure the aberrations of the wavefront, the working principle of the Hartmann‐Shack sensor. Within illumination optics, MLA are commonly used for beam homogenization in projection systems. In all fields of application ranging from automotive, medical, consumer and industrial optics to high‐end sensors for space instrumentation, high quality lens arrays for direct use or replication must be provided.</jats:p>