Related Experiment Video
Updated: Jun 10, 2026
09:41
Emission Spectroscopic Boundary Layer Investigation during Ablative Material Testing in Plasmatron
Published on: June 9, 2016
[Study on calibration method of spatial heterodyne spectrometer]
Hai-Liang Shi1, Wei Xiong, Ming-Min Zuo
1Anhui Institute of Optics and Fine Mechanics, and Key Laboratory of Optical Calibration and Characterization, Chinese Academy of Sciences, Hefei 230031, China. hlshi@aiofm.ac.cn
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|August 17, 2010
Summary
This study details laboratory calibration methods for spatial heterodyne spectroscopy (SHS), a novel hyperspectral analysis technique. The validated methods ensure accurate spectral and radiometric calibration for precise data retrieval.
Area of Science:
- Optics and Spectroscopy
- Instrument Calibration
Context:
- Spatial heterodyne spectroscopy (SHS) is an emerging technique for hyperspectral analysis.
- Standardized calibration protocols for SHS instruments are not yet well-established.
- Accurate calibration is crucial for quantitative data retrieval in hyperspectral imaging.
Purpose:
- To investigate and establish robust laboratory calibration methods for spatial heterodyne spectroscopy (SHS).
- To perform spectral calibration using tunable lasers and halogen lamps.
- To conduct radiometric calibration by measuring system stability and response using integrating spheres, standard lamps, and diffusers.
Summary:
- The study presents fundamental theories of SHS and details experimental procedures for spectral and radiometric calibration.
- Spectral calibration was designed based on emission lines and system parameters, utilizing tunable lasers and halogen lamps.
- Radiometric calibration involved measuring system stability with an integrating sphere and calibrating responses with standard lamps and diffusers.
- Experimental results validated the designed calibration methods, confirming the instrument's designed spectral range and resolution with minimal spectral shift.
Impact:
- Provides fundamental, validated calibration methods essential for the quantitative application of SHS.
- Enables more accurate and reliable hyperspectral data acquisition and analysis.
- Facilitates the broader adoption and development of SHS technology in scientific research and applications.
Related Concept Videos
01:12Instrument Calibration
Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
01:10Calibration Curves: Correlation Coefficient
In a linear calibration curve, there is a value called the calibration coefficient, denoted by 'r,' which measures the strength and the direction of association between two variables. The correlation coefficient value ranges from −1 to +1. A value of +1 indicates a perfect positive linear correlation, −1 denotes a perfect negative correlation, and 0 implies no correlation between the two variables. A positive correlation value establishes that as one variable increases, the other increases, and...
01:14UV–Vis Spectrometers
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
01:25IR Spectrometers
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
01:20Calibration Curves: Linear Least Squares
A calibration curve is a plot of the instrument's response against a series of known concentrations of a substance. This curve is used to set the instrument response levels, using the substance and its concentrations as standards. Alternatively, or additionally, an equation is fitted to the calibration curve plot and subsequently used to calculate the unknown concentrations of other samples reliably.
For data that follow a straight line, the standard method for fitting is the linear...
For data that follow a straight line, the standard method for fitting is the linear...
01:26Raman Spectroscopy Instrumentation: Overview
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...