Monochromatic Calibration Source for Spectroradiometer Precision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional spectroradiometers require frequent recalibration due to wavelength and spectral sensitivity fluctuations, which is impractical for users to perform without specialized facilities, leading to high costs and reduced measurement precision.
Innovation Solution
A calibration system using a plurality of monochromatic sources emitting light at different wavelengths, a reference light emitter, and a sensor to measure and control the reference intensity, allowing users to perform wavelength and spectral sensitivity calibration independently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an incandescent calibration source is used for spectral sensitivity calibration, then calibration reference can be provided, but strict control of color temperature and complex monitoring arrangements are required
Solution Approach 1:
The patent replaces the mechanical/thermal control system of incandescent sources with an optical system using monochromatic light sources. Instead of controlling color temperature of a broadband source, the invention uses multiple discrete monochromatic sources at predetermined wavelengths, eliminating the need for temperature control mechanisms and complex monitoring arrangements.
Solution Approach 2:
The invention changes the fundamental parameter of the calibration source from broadband thermal radiation with variable color temperature to discrete monochromatic wavelengths. This parameter change simplifies the calibration process by providing stable, predetermined wavelengths without requiring temperature control, while still enabling spectral sensitivity calibration through comparison of measured intensities at these wavelengths.
2Reliability
If conventional calibration sources are used, then calibration can be performed, but frequent recalibration requires returning to manufacturing facilities, increasing cost and time
Solution Approach 1:
The patent enables users to perform spectral sensitivity calibration themselves using the monochromatic light source system. The calibration source is designed to be portable and easy to use, allowing field recalibration without requiring specialized facilities or returning equipment to manufacturing sites. This self-service capability dramatically reduces recalibration time and cost while maintaining measurement reliability.
3Ease of operation
If monochromatic sources are used for calibration, then user-friendly recalibration is enabled, but the system requires multiple light sources and control mechanisms
Solution Approach 1:
The patent combines multiple monochromatic light sources into a single integrated calibration device that can be easily handled and transported. The multiple sources are arranged in a compact configuration with unified control, allowing users to operate the entire system as a single unit rather than managing separate components. This merging approach maintains ease of operation while providing the necessary multiple wavelengths for comprehensive calibration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise and frequent recalibration of spectroradiometers, maintaining measurement precision without the need for returning the device to a manufacturing or servicing facility, thereby reducing costs and time.
Implementation Method 1
a plurality of monochromatic sources (21, 22, 23) for emitting monochromatic light having different wavelengths from each other, respectively
Implementation Method 2
a reference light emitter for emitting monochromatic reference light by receiving the monochromatic light emitted from the monochromatic sources
Implementation Method 3
a sensor for measuring a reference intensity of the monochromatic reference light emitted from the reference light emitter
Data Source
AI summary
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.