Spectrometer

Light is kind of electromagnetic wave. Visible light for example, this is an electromagnetic wave which has wavelength that can be sensed by human eye. Source of light may emit light not only one wavelength. White light consist many wavelength from 380 nm – 750 nm. The proof about this is when white light (such as sun light) is refracted by prism, we can see many color (from red to violet) as a result. Color of light depends on the wavelength, so we can conclude that sunlight consist many wavelength.

Spectrometer is an instrument which can be used for measure light properties. The variable can be measured by spectrometer usually is intensity. Electronic spectrometer consists of device which can convert from light to electricity, it is called CCD.

The steps inside electronic-spectrometer are started with light enter the spectrometer, then a device (Prism or grating) refracts the light based on its wavelength. For example white light will be refracted into all of visible light wavelength. These wavelengths will be converted into electric signal by CCD. This signal will be transmitted to PC to be processed. Finally we can see the spectrum of light on the PC’s monitor. Usually electronic spectrometer is completed with its software which can be used to measure in several units, such as Watt, Lumen, Lux, etc.

Spectrometer is used for many applications, Such as solution identification and LED Junction temperature Measurement.