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IR Spectrometers

IR 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...

Infrared (IR) Spectroscopy: Overview

Infrared (IR) Spectroscopy: Overview

When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...

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Related Experiment Video

Updated: May 1, 2026

RGB and Spectral Root Imaging for Plant Phenotyping and Physiological Research: Experimental Setup and Imaging Protocols

RGB and Spectral Root Imaging for Plant Phenotyping and Physiological Research: Experimental Setup and Imaging Protocols

Published on: August 8, 2017

RGB-NIR multispectral camera.

Zhenyue Chen, Xia Wang, Rongguang Liang

|March 26, 2014

Summary

This summary is machine-generated.

A new CMOS camera enables simultaneous multispectral imaging using four Bayer patterns. This technique offers accurate color information for applications like portrait enhancement and shadow removal.

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Last Updated: May 1, 2026

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Area of Science:

Optics and Photonics
Image Processing
Computer Vision

Background:

Multispectral imaging captures information across multiple electromagnetic spectrum bands.
Accurate color reproduction is crucial for various imaging applications.
Existing techniques may have limitations in simultaneous spectral acquisition.

Purpose of the Study:

To introduce a novel multispectral imaging technique utilizing a new CMOS camera.
To enable simultaneous acquisition of four spectral images.
To demonstrate the utility of the technique in practical applications.

Main Methods:

Development of a new CMOS camera with four-channel Bayer patterns for simultaneous spectral image capture.
Implementation of a color correction process to ensure accurate color information.
Application of the technique to portrait enhancement, shadow removal, and vein enhancement.

Main Results:

Simultaneous acquisition of four spectral images was achieved.
Accurate color information was obtained through the developed color correction process.
Successful demonstration of applications including portrait enhancement, shadow removal, and vein enhancement.

Conclusions:

The proposed multispectral imaging technique with the new CMOS camera is effective.
The technique provides accurate color information and has diverse practical applications.
This method offers a promising approach for advanced imaging tasks.