Calibration source for calibrating spectroradiometer, calibration method using the same, and calibration system
AssigneeKonica Minolta Sensing, Inc.
InventorKenji Imura
Life of this patent
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Abstract
A spectroradiometer is calibrated by a calibration source including a plurality of monochromatic sources for emitting monochromatic rays having different wavelengths from each other, respectively; a reference light emitter for emitting monochromatic reference light by receiving the monochromatic rays emitted from the monochromatic sources; a reference sensor for measuring a reference intensity of the monochromatic reference light emitted from the reference light emitter; and a controller for controlling the emission of the monochromatic rays by the monochromatic sources, and the measurement of the reference intensity of the monochromatic reference light by the reference sensor.
Claims17
A calibration source for calibrating a spectroradiometer comprising:
- a plurality of monochromatic sources for emitting monochromatic light having different wavelengths from each other, respectively;
- a reference light emitter for emitting monochromatic reference light by receiving the monochromatic light emitted from the monochromatic sources;
- a sensor for measuring a reference intensity of the monochromatic reference light emitted from the reference light emitter;
- and
- a controller for controlling the emission of the monochromatic light by the monochromatic sources, and the measurement of the reference intensity of the monochromatic reference light by the sensor.
A method for calibrating a spectroradiometer using a calibration source provided with a plurality of monochromatic sources for emitting monochromatic light having different wavelengths from each other, respectively, a reference light emitter for emitting monochromatic reference light by receiving the monochromatic light emitted from the monochromatic sources, a sensor for measuring a reference intensity of the monochromatic reference light emitted from the reference light emitter, and a controller for controlling the emission of the monochromatic light by the monochromatic sources, and the measurement of the reference intensity of the monochromatic reference light by the sensor, the calibration method comprising the steps of:
- turning on the monochromatic sources;
- measuring the monochromatic reference light emitted from the reference light emitter by the spectroradiometer to output a spectral radiance of the monochromatic reference light;
- measuring the reference intensity of the monochromatic reference light emitted from the reference light emitter by the sensor to calculate a reference spectral radiance of the monochromatic reference light based on the measurement result;
- and
- correcting a sensitivity of the spectroradiometer at the wavelength of the monochromatic reference light, based on the spectral radiance and the reference spectral radiance of the monochromatic reference light.
A calibration system comprising:
- a calibration source having:
- a plurality of monochromatic sources for emitting monochromatic light having different wavelengths from each other, respectively,
- a reference light emitter for emitting monochromatic reference light by receiving the monochromatic light emitted from the monochromatic sources,
- a sensor for measuring a reference intensity of the monochromatic reference light emitted from the reference light emitter, and
- a controller for controlling the emission of the monochromatic light by the monochromatic sources, and the measurement of the reference intensity of the monochromatic reference light by the sensor;
- a spectroradiometer to be calibrated;
- a computer for controlling calibration;
- and
- a computer-readable recording medium storing a program which causes the computer to execute:
- turning on the monochromatic sources;
- measuring the monochromatic reference light emitted from the reference light emitter by the spectroradiometer to output a spectral radiance of the monochromatic reference light based on the measurement result;
- measuring the reference intensity of the monochromatic reference light emitted from the reference light emitter by the sensor to output a reference spectral radiance of the monochromatic reference light based on the measurement result;
- and
- correcting a sensitivity of the spectroradiometer at the wavelength of the monochromatic reference light, based on the spectral radiance and the reference spectral radiance of the monochromatic reference light.
Dependencies are inferred from the claim text.