Patent ID: 6716300
Filing Date: 2004-04-06
Classification: G01L,G01N,H01J

Abstract:
An emission spectroscopic processing apparatus, comprising:a spectroscope for spectrally separating input light emitted from a process unit into component spectra; a light receiving unit including a series of light receiving elements for detecting light quantities of said component spectra on a wavelength basis; a first signal hold unit for holding sequentially each of detection signals outputted from a subset of adjacent light receiving elements contained in said series of light receiving elements during a first period; an adder unit for adding together the detection signals of adjacent light receiving elements of said light receiving unit inclusive of said held detection signals of said subset of the adjacent light receiving elements; a second signal hold unit for holding sequentially sum outputs of said adder unit; and a signal processing unit for determining a state of said process unit on the basis of the output of said second signal hold unit.