Difference between revisions of "Team:Exeter/project/intensity"

 
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<h3 style="text-align:center">A breif outline of the use of the light source:</h3>
 
<h3 style="text-align:center">A breif outline of the use of the light source:</h3>
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  <p id="pp">Our project involved prodution of light dependant killswitches. These mechanisms only become active at
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  <p id="pp">Our project involved prodution of light dependant kill switches. These mechanisms are most active at
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  certain wavelengths. KillerRed is active at the 540-580nm range, which is green/yellow. KillerOrange is most active
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  certain wavelengths. KillerRed is excited by green/yellow light (540-580 nm). KillerOrange excited by blue light (460-490 nm). To efficiently activiate these kill switches
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at 460-490nm. To efficiently activiate these kill swithces
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  we needed to provide light at these wavelengths at a reasonable intensity. We chose a light source consisting of a 4x8 LED array. With help from <a href="#">Ryan Edgington</a>, we used an Ocean Optics spectrometer (USB2000+VIS-NIR-ES spectrometer, connected to a CC3 cosine corrector with a 3.9 mm collection diameter attached to a 0.55 mm diameter optical fibre) to measure relative spectra and intensity. We constructed a box around the light to prevent ambient light entering. Access to inside the box was gained through an opening cut in the front.</p>
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  we needed to provide light at these wavelengths at a reasonable intensity.We were given a light consisting of 4x8 LED's
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in a grid. We constructed a box around the light to let no outside light in with a little door for ease of accsess.</p>
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<p id="pp"> The whereabouts of the manual
 
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were lost and no information online could produce the figures we needed which were
 
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Absolute intensity and Wavelength. Having close ties with the physics department
 
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We contacted <a href="#">Ryan Edgington</a> who was able to get and optical fiber and software
 
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for us to measure intensity. We hooked up the system from oceaon optics and we were able to take
 
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relative spectra. Measuring intensity relitivley does not yeild absolute meaurements. We hit a brick wall as
 
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we could not get an exact figure for intensity. To allow the fiber to take absolute measurements we needed a
 
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calibrated light source so that we had a reference level to compare with. Not having this we persude other options.</p>
 
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Latest revision as of 14:20, 11 October 2016