Technology for manufacturing diffraction gratings for spectrometry has not changed significantly in the past 40 years. But, according to Dr. Christoph M. Greiner of LightSmyth Technologies, that has changed thanks to deep-ultraviolet (DUV) reduction photolithography. In a feature article in the July issue of Photonics Tech Briefs, Dr. Greiner explains that for gratings, the DUV production optical stepper allows the design of more than 1,011 pixels on an individual basis. The ability to monolithically integrate multiple gratings on a single substrate using the DUV process makes it possible to integrate new functions into diffraction gratings.
Read the feature article on page IIa of the July issue of PTB. Go here for more info on LightSmyth's monolithic grating arrays .