Event Title

Overhaul of a Miniature Goniophotometer

Session Number

Project ID: ENGN 2

Advisor(s)

Dr. Kevin Martin; Northern Illinois University

Discipline

Engineering

Start Date

22-4-2020 8:30 AM

End Date

22-4-2020 8:45 AM

Abstract

A goniophotometer is a device that determines the different intensities (luminosity) of different wavelengths of light emitted from an LED at different angles. Modern goniophotometers are expensive, and the entire setup takes up the size of a large room. Our research is concerned with creating a miniaturized version of a goniophotometer. We are picking up the project from undergraduate students who have developed a one cubic meter version of the goniophotometer. Their version utilizes a Raspberry Pi, and a nanoLambda spectral sensor. However, this was only a prototyped and incomplete model, so while the previous goniophotometer was able to take spectral measurements, there were extreme inefficiencies in the coding and in the measurement algorithm. We have been working on doing a complete overhaul of the project, which includes replacing the nanoLambda sensor with a AS726X spectral sensor, two rotary encoders to more precisely measure the angle of measurements, and a complete remake of all the code.

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Apr 22nd, 8:30 AM Apr 22nd, 8:45 AM

Overhaul of a Miniature Goniophotometer

A goniophotometer is a device that determines the different intensities (luminosity) of different wavelengths of light emitted from an LED at different angles. Modern goniophotometers are expensive, and the entire setup takes up the size of a large room. Our research is concerned with creating a miniaturized version of a goniophotometer. We are picking up the project from undergraduate students who have developed a one cubic meter version of the goniophotometer. Their version utilizes a Raspberry Pi, and a nanoLambda spectral sensor. However, this was only a prototyped and incomplete model, so while the previous goniophotometer was able to take spectral measurements, there were extreme inefficiencies in the coding and in the measurement algorithm. We have been working on doing a complete overhaul of the project, which includes replacing the nanoLambda sensor with a AS726X spectral sensor, two rotary encoders to more precisely measure the angle of measurements, and a complete remake of all the code.