Optical measuring device, and spectroscopic light equipment and

Details Optical measuring device, and spectroscopic light equipment and Optical measuring device, and spectroscopic light equipment and

1997-07-30

1999-09-07

Kim, Robert H.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

250226, G01J 328, G01J 350

Patent

active

059495405

ABSTRACT:
A light equipment irradiating a target with light adjusts light from a light source in a light source optical system and introduces the same into an acousto-optic device, for separating the same into its spectral components and modulating the same in the acousto-optic device. A condensing optical system condenses first order diffractive light outgoing from the acousto-optic device, so that an irradiation optical system irradiates a target with the same. A photodetection device comprises a photoreceiving part and a data processing part, so that the photoreceiving part converts a signal responsive to the fluctuation of modulated measuring light to a plurality of signals of different degrees of amplification simultaneously outputting same. The data processing part selects a non-saturated value of an amplifier or an A-D convertor while maintaining the largest degree of amplification from these signals, and lock-in processes same with a modulation frequency modulating the measuring light. A specific substance in a scattering substance can be non-invasively measured with high accuracy.

REFERENCES:
patent: 3927944 (1975-12-01), Iwahashi et al.
patent: 4449821 (1984-05-01), Lee
patent: 5296910 (1994-03-01), Cole
patent: 5444528 (1995-08-01), Puschell
patent: 5477321 (1995-12-01), Johnson

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