Question

What is a diode array spectrometers?

Answer 1

Diode Array Spectrometers-

                          A Diode Array Spectrometers are single beam, microprocessor controlled spectrophotometer. (Visible/UV - range of 190 to 820 nm with 2 nm resolution). It is used when speed of measurement is essential. It is faster and more sensitive, has more precision than a conventional spectrometer due to the photo diode array detection system.This spectrometer is ideal for kinetics. A second diode array instrument is also there used for; Background for Diode array - Diode arrays are assemblies of individual photo diodes in a linear array. Self-scanned arrays have the read out electronics included on the chip with the array. When read out, all elements of the array must be read out in series. The array has 1024 elements. Light of all wavelengths falls on the diode array and is measured simultaneously, i.e. data acquisition is done in parallel. Speed is the best known advantage of diode array spectroscopy. Data is acquired in parallel, the detectors are read out by "Electronic Scanning", and microprocessors and computers are used to process data; Measurements are made at different wavelengths at the same time. Conventional spectrophotometers will make multi wavelength measurements but there’s a time differential between each measurement.

Applications-

1. They feature a unique combination of novel technologies, speed, comfort in handling, and ease of operation.

2. Used in a research study; the potentials of this powerful instrument in the field of microscope are evaluated.

3. Examples for possible applications the results of typical measurements in absorption and reflection, including film‐thickness determination of microstructured layers, are presented.