Spectroscopic apparatus
First Claim
1. A spectroscopic apparatus using light having a first wavelength which has a predetermined absorptivity for a specific object, and light having a second wavelength which has a smaller absorptivity for the specific object than the first wavelength, the spectroscopic apparatus comprising:
- a light radiating portion configured to radiate, to a target, collimated light with the first wavelength which is obtained by the light having the first wavelength being substantially collimated, and collimated light with the second wavelength which is obtained by the light having the second wavelength being substantially collimated;
a light receiving portion configured to receive first scattered light obtained by the collimated light with the first wavelength transmitting through the target or being reflected by the target, and second scattered light obtained by the collimated light with the second wavelength transmitting through the target or being reflected by the target; and
a measuring portion configured to generate information to be used for detection of the specific object at the target, based on a difference between the first scattered light and the second scattered light received by the light receiving portion,wherein the light radiating portion includes a scan processing portion configured to radiate the collimated light with the first wavelength directly to the target so as to scan in 2 dimensional directions by using reflection and diffraction, and then radiate the collimated light with the second wavelength directly to the target after radiating with the first wavelength so as to scan in the 2-dimensional directions by using reflection and diffraction.
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Accused Products
Abstract
A light radiating portion radiates light with wavelength λ1 having predetermined absorptivity for an object and light with wavelength λ2 having smaller absorptivity for the object than the wavelength λ1, to a target, so as to scan in 2-dimensional directions. A light receiving portion receives scattered lights reflected by the target based on light with wavelength λ1 and light with wavelength λ2. A measuring portion generates information used for detection of the object at the target, based on difference between the two scattered lights with wavelength λ1 and wavelength λ2 received by the light receiving portion. An output portion outputs whether or not the object is present at the target, by 2-dimensional area information, based on scanning by the light radiating portion and information generated by the measuring portion.
12 Citations
22 Claims
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1. A spectroscopic apparatus using light having a first wavelength which has a predetermined absorptivity for a specific object, and light having a second wavelength which has a smaller absorptivity for the specific object than the first wavelength, the spectroscopic apparatus comprising:
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a light radiating portion configured to radiate, to a target, collimated light with the first wavelength which is obtained by the light having the first wavelength being substantially collimated, and collimated light with the second wavelength which is obtained by the light having the second wavelength being substantially collimated; a light receiving portion configured to receive first scattered light obtained by the collimated light with the first wavelength transmitting through the target or being reflected by the target, and second scattered light obtained by the collimated light with the second wavelength transmitting through the target or being reflected by the target; and a measuring portion configured to generate information to be used for detection of the specific object at the target, based on a difference between the first scattered light and the second scattered light received by the light receiving portion, wherein the light radiating portion includes a scan processing portion configured to radiate the collimated light with the first wavelength directly to the target so as to scan in 2 dimensional directions by using reflection and diffraction, and then radiate the collimated light with the second wavelength directly to the target after radiating with the first wavelength so as to scan in the 2-dimensional directions by using reflection and diffraction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification