APPLICATION OF LINEAR VARIABLE OPTICAL BANDPASS FILTERS ONTO DETECTOR ARRAYS TO CREATE MOBILE SMART PHONE SPECTROMETERS
A linear variable optical bandpass filter that is coated directly on an electronic device such as the detector array in a mobile smart phone by a combination of established optical modeling software and microlithography techniques to create a spectrometer in a mobile smart phone is disclosed.
1 . A method for applying is linear variable optical bandpass filter coating directly on a mobile smart phone detector array comprising:
first X and Y coordinates of photosensitive areas of said mobile smart phone detector array wafer are determined from a top metal structure of said mobile smart phone detector array; and,
then said X and Y coordinates combined with a desired linear variable optical bandpass coating dispersion across said photosensitive areas of said mobile smart phone detector array are fed into an optical modeling software program using a coating application source as a light source.
2 . The method of claim 1 wherein an output of said optical modeling software is a shadow mask design and wherein a shadow mask is then manufactured via three-dimensional printing.
3 . The method of claim 2 wherein said shadow mask design has a spacer topography incorporated such that said shadow mask is contacted to said mobile smart phone detector array and provides a shadow for said linear variable optical bandpass film coating gradient to be deposited directly on said mobile smart phone detector array.