YTR-6311 # VIS Spectroscopy Experiment

The energy level distributions of atoms, ions, and molecules are characteristic for different substances, and consequently, the energies of absorbed and emitted photons are also characteristic. The chemical composition and relative abundance of a substance can be determined by measuring these characteristic spectral lines, a method of substance identification known as spectral analysis. This experiment, based on the principle of grating diffraction spectroscopy, utilizes an array detector, optimized optical path and circuit design, and miniaturized visible-near-infrared light source technology to develop a compact visible-near-infrared spectral analyzer operating from 350-1050 nm with a resolution of approximately 1.5 nm. This instrument is capable of performing experiments on emission spectroscopy, absorption spectroscopy, and fluorescence spectroscopy. The key concepts covered in this experiment include wavelength, resolution, fluorescence spectra, transmittance, absorbance, and the Beer-Lambert Law. Through these experiments, students can cultivate their physical experimental thinking and experimental design capabilities.

Features
- Spectral measurement range: 350-1050 nm
- Detector: High-sensitivity, ≥2048 pixels, with millisecond-level spectral acquisition speed
- Light source: 350-1100 nm, featuring blue and green LED options for fluorescence
- Connectivity: USB hot-swappable
- Signal-to-noise ratio (SNR): ≥300:1
- Analog-to-digital converter (A/D): ≥12-bit
- Filter: Eliminates second-order and higher-order diffracted spectra
- Fiber optic probe: SMA905 reflective type, facilitating instrument measurement of emission spectra
- Software: Dedicated spectral analysis software with SDK for secondary development

Experiments
1) Measurement of spectra from various light sources; comprehension of the luminescence mechanisms of different sources (requires a fiber optic adapter and fiber optic cable).
2) Transmittance measurement;
3) Absorbance measurement;
4) Concentration determination;
5) Reaction rate or decay rate measurement;
6) Compound purity assessment;
7) Fluorescence spectrum measurement.