mask for cross talk suppression and 4 exchangeable filters 90 for wavelength selection the assembly of all parts allows for a very thin detector design yielding an effective complete detector thickness of about 4 0 mm optical imaging using micro lens arrays 92 mlas also referred to as microlenticular or lens let arrays are used primarily in optical data communication applications e g to interconnect optical fiber bundles or as light collection elements to increase the optical fill factor in ccds see fig4 which shows a rendering of the cross sectional view of the optical detector 10 along with a photograph of the various parts of the detector 10 see also wo2006111486 which is incorporated herein by reference according to the cross sectional view of the optical detector 10 according to fig4 said optical detector 10 comprises an exchangeable filter 90 said micro lens array 92 previously being mentioned as well as a collimator 94 still further a photosensor 96 and a corresponding electronics 98 are comprised within the optical detector 10 since all components of said optical detector 10 are very thin the effective complete detector thickness can be minimized and as previously mentioned amounts to about 4 mm to date mlas 92 are produced from fused silica silicon or other materials depending on application wavelength and are typically available in array sizes up to 120 mm u00d7 120 mm and with lens.