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MicroLAB Inc.
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MicroLAB - Model 141 -Visual Spectrophotometer for Emission and Absorption Spectra Analysis

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The Model 141 Visual Spectrometer by MicroLAB Inc. is a pivotal component within a modular spectrometer system, designed for the precise analysis of visible region emission and absorption spectra. This instrument integrates a sample holder and an adjustable slit assembly, offering three laser-cut slit widths—760, 380, and 125 microns—that influence the spectral resolution and light throughput. With a full width half maximum resolution of 6 nm at its narrowest slit, this spectrometer ensures consistent accuracy across the spectrum. Components like a collimating lens and diffraction grating strategically placed from the slit facilitate the creation of detailed spectra. It supports various methods for viewing or recording the spectra, including direct observation, video camera usage, or cell-phone camera integration. The Model 141 enables extensive experimentation, such as examination of line and band spectra, wavelength calibration, and determination of spectral profiles, supporting a broad scope of spectrophotometry applications.
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The Model 141 Visual Spectrometer provides visual and photographic observation of visible region emission and absorption spectra.

Tags: Visual Spectrophotometer
Modules, FS-528 Interface
SKU: 141

The MicroLab Visual Spectrometer is the central unit in a modular spectrometer system. The spectrometer consists of a sample holder that will suspend a sample vial half-way down the spectrometer slit. An adjustable slit assembly that provides three slit widths. Spectrometer slit width determines the resolution of the image (smaller slits produce a higher spectral resolution and more accurate wavelength measurement), and the light throughput or brightness of the image (wider slits produce brighter images). The three slits are laser-cut and are 760, 380, and 125 microns wide. Full width half maximum (FWHM) resolution is 6 nm with the narrowest slit and is constant across the spectrum. A collimating lens and diffraction grating placed a distance from the slit create the spectrum. The image may be viewed by eye, with a video (web) camera for a demonstration, or with a cell-phone camera for photographic recording and measurement of the spectra.

  • Line & Band Spectra-hot gasses and solids
  • Fiber optic cables & reference spectra
  • Slit width, light throughput, & resolution
  • Wavelength Calibration
  • The fingerprint nature of atomic spectra
  • Source Temperature & the Boltzmann energy distribution
  • ID of an unknown element from spectral lines
  • The Formation of Color
  • Measuring Spectral Profiles
  • Wavelength, frequency, and color of light waves. White light is not white