US 2011/0211192 A1Published application

Optical measuring device and calibration device

AssigneeFUJIFILM Corporation

InventorsTakeshi KIMURA, Hitoshi Shimizu

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Abstract

There is provided an optical measuring device including: plural light-receiving units; a frame to which the respective light-receiving units are mounted on a same circumference whose axial center is a predetermined position, with optical axes of the light-receiving units being directed toward the axial center, an object of measurement being disposed at an axially central portion of the circumference; a measuring section that outputs measured values corresponding to received light amounts; a reference sample disposed, instead of the object of measurement, at the axially central portion of the circumference such that a longitudinal direction of the reference sample runs along an axis of the circumference; a reference light source that illuminates light of the predetermined wavelength toward the reference sample; and a calibrating section that calibrates the sensitivities of the plural light-receiving units at a time of measuring the object of measurement.

Claims10

Dependent claims

An optical measuring device comprising:

a plurality of light-receiving units that each receive light of a predetermined wavelength via a light-receiving element;
a frame to which the respective light-receiving units are mounted on a same circumference whose axial center is a predetermined position, with optical axes of the light-receiving units being directed toward the axial center, an object of measurement being disposed at an axially central portion of the circumference;
a measuring section that, at the respective light-receiving elements of the plurality of light-receiving units, receives light exiting from the object of measurement that is disposed at the axially central portion of the circumference, and that outputs measured values corresponding to received light amounts;
a reference sample that is formed in a shape of a pillar having a predetermined cross-sectional shape and that is formed of a material at which isotropic scattering of light occurs as an optical characteristic, wherein in a case of carrying out calibration of sensitivities of the plurality of light-receiving units, the reference sample is disposed, instead of the object of measurement, at the axially central portion of the circumference such that a longitudinal direction of the reference sample runs along an axis of the circumference;
a reference light source that is disposed on the axis of the circumference so as to face one surface in the longitudinal direction of the reference sample that is disposed at the axially central portion of the circumference, and that illuminates light of the predetermined wavelength toward the reference sample;
and
a calibrating section that calibrates the sensitivities of the plurality of light-receiving units at a time of measuring the object of measurement, on the basis of measured values for calibration that are outputted from the measuring section due to light, that exits from an outer peripheral surface of the reference sample in accordance with light illuminated from the reference light source onto the reference sample, being received at the respective light-receiving units.

4 more elements

A calibration device that calibrates a plurality of light-receiving units that are mounted to a frame on a same circumference whose axial center is a predetermined position, with optical axes of the light-receiving units being directed toward the axial center of the circumference, and that each receive light of a predetermined wavelength by a light-receiving element and output a measured value corresponding to a received light amount, the calibration device comprising:

a reference sample that is formed in a shape of a pillar having a predetermined cross-sectional shape and of a material at which isotropic scattering of light occurs as an optical characteristic, and that is disposed at an axially central portion of the circumference such that a longitudinal direction of the reference sample runs along an axis of the circumference;
a reference light source that is disposed on the axis of the circumference so as to face one surface in the longitudinal direction of the reference sample, and that illuminates light of the predetermined wavelength toward the reference sample;
a measuring section that, at the respective light-receiving units, receives light exiting from an outer peripheral surface of the reference sample in accordance with light illuminated from the reference light source onto the reference sample, and that outputs measured values for calibration corresponding to received light amounts;
and
a calibrating section that calibrates sensitivities of the plurality of light-receiving units on the basis of the measured values for calibration that are outputted from the measuring section.

2 more elements

Dependencies are inferred from the claim text.