Spectrograph

The objective of this design project is to construct a spectrograph that can resolve the wavelengths of LEDs in the visible region of the Electromagnetic Spectrum and distinguish the colour of LED shinning into the system. A spectrograph is used to produce a visual representation for the frequency (or wavelength) spectrum for an incoming wave. For our purposes this incoming wave is light produced in the visible spectrum by an assortment of LEDs. To obtain such a spectrum, the incoming wave must be split into a spectrum of individual frequencies. Then ten photodiodes are put in the other end of system to import the inputs and by using polynomial interpolation to get a best-fit spectrum curve. The goal of the spectrograph is to be able to resolve the LED's individually The spectrometer interface can plot intensity in volts against wavelength in nm, to aid description the color of input light.

The purpose of this design project is to update the Engineering Physics 3G03 Project designed by students Yu Lou, Wei Cui and I. This project can be used as a future representation of some of the work students in the photonics stream of Engineering Physics are involved in during their undergrad career.

Liquid Transfer Project

Summer 2011