Patent ID: 6070315
Filing Date: 2000-06-06
Classification: G02B,Y10T

Abstract:
A method of producing a focusing reflection grating structure for the series manufacture of microspectrometers including flexible foil strips provided with a grating structure which foil strips are supported by housing portions of said microspectrometers, said method comprising the steps of:depositing a thin layer of a reflective metal on a foil,mounting said foil with said reflective metal layer on onto a support member of an ultra precision turning lathe,rotating said support member and cutting, with microforming diamonds, circumferential parallel grooves into said reflective metal layer on said foil such that sawtooth-like annular teeth with predetermined tooth spacing and depth are generated,then dividing the foil by cuts extending parallel to the turning lathe axis into a plurality of narrow flexible strips, whereby the distance between said cuts determines the height of said foil strips, andbending the flexible foil strips into a curved shape providing a focusing reflection grating structure.