Image 1: Zemax image simulation (top) and actually measured output (bottom) of the pupil slicer.<\/pre>\n\t\t\n\t<\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Micro-lens arrays form the basis for this pupil slicer. Different micro-lens types can be used to achieve this: With a cylindrical lens array the principle function was demonstrated in a conceptual design study. To achieve a better performance and fewer losses an adapted double-sided micro-lens array was needed (Image2). The base is a 5\u00d71 lens array with a rectangular aperture (0.3\u00d70.9 mm\u00b2) of the single lenses. The entrance surface has a spherical (Image3) and the exit surface has an aspherical shape (Image4) to compensate for aberrations and reduce the SAG of the lenses. An additional requirement is a high fill factor.     <\/p>\n\t\t\n\t<\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Image 2: Sketch of the two MLAs bonded together to form a single optical element.<\/pre>\n\t\t\n\t<\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t        
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Image 3: Microscope image of the front facing MLA in diffuse illumination with the size of the incident light beam shown as a circle.<\/pre>\n\t\t\n\t<\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t            <\/div>\r\n        <\/div>\r\n                
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Image 4: Microscope image of the back facing MLA in diffuse illumination. This MLA has aspheric lenses with short radii of curvature. <\/pre>\n\t\t\n\t<\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t            <\/div>\r\n        <\/div>\r\n        \t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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The technology used by INGENERIC has the capability to achieve the specifications needed for that MLA. A fill factor of >98 % in combination with a form accuracy in the range of 50nm enables a high overall efficiency of the system. 

INGENERIC micro-lens arrays in general offer several advantages such as high numerical apertures, highest transmission, high fill factor due to minimized transition zones, minimum aberrations due to high form accuracy. Double sided lens arrays can be realized and convince high center thickness accuracy and a precise orientation of the two sides. Thanks to the superior production technology INGENERIC can serve a variety of the customers\u2019 requirements:
Detailed information on INGENERIC MLAs and customized solutions can be found here<\/a>. <\/p>\n
Click here to read the report of the University of Chicago in full length.<\/a><\/p>\n\t\t\n\t<\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t            <\/div>\r\n        <\/div>\r\n        \t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"
01\/17\/2017 – The University of Chicago develops a micro-lens array based pupil slicer and double scrambler for a new fiber-fed, red-optical, high-precision radial-velocity spectrograph to detect new planets around the nearest stars in the solar neighborhood. <\/p>\n","protected":false},"author":1,"featured_media":20496,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[71],"tags":[],"class_list":["post-20497","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-products"],"yoast_head":"\n