Public Lab Research note


The user 'dhaffnersr' has been placed in moderation and will not be able to respond to comments.

Microscopic View of Public Lab's Acetate film slits

by dhaffnersr |

I have wanted to do this for awhile now, and finally got around to it and I am glad I did, I took my microscope today and examined the 0.09mm slit (one of 4 that comes with the Plab kit you can order, for various slit widths,) as I had suspected there are many imperfections riddled throughout the slit entrance area.

09mm_slit_at_100x_magnification_aug19_both_pictues.png

I'm not sure if these imperfections really pose any real attenuation of signal exiting the slit or distortion effects, but I am going to try an open air slit design of the same size and see if there is any difference.

Any comments or questions are welcomed.



spectrometer spectrum-matching spectrography image-compositing image-processing citizen-science field-test spectralworkbench grassroots-science weird-science plots ultraviolet database compact-fluorescent how-to testing spectral-analysis tests led chlorophyll metadata data-collection data popular-science museum-of-science leds quantitative datalogger civic-science slit-width specification research-notes electrochemical wavelength technique purelab reference hopewell city-point city-point-hopewell-va dhaffnersr david-h-haffner-sr spekwin32 david-h-haffner haffner david ethanol quartz graphs gnu-plot 400nm 400-nm-led technical technical-specs technical-specifications testing-uv-led images-led-testing images-led-testing-400-nm-uv images-test-led-400nm-ultra-violet uv-spectrum-200-400-nm-leds-testing-test-results quartz-cuvettes quartz-cuvette 400nm-led-thru-quartz-cuvette-test electrical-engineering google-search meta-tag meta-tags chlorophyll-testing cool-stuff very-cool-stuff relevant uv-vis uv-vis-ethanol b aspirin uv-vis-chlorophyll dye dyed eosin eosin-y extract portable-laser emission-wavelength wavelengths generic-laser uv-vis-sodium-hydroxide redox distance-of-slit bandwidth methylene-blue blank-distilled-water aries emission-wavelength-for-rhodamine-b image-raman-spectrometer google-image-rhodamine-b-samples google-image-raman-spectrometer-homemade plots-spectrometry optical-spectroscopy circular-dichroism-spectroscopy fluorescence-dye photophysik led-testing led-test hardware-mods how-do-i-build-a-spectrometer

response:13346


3 Comments

This is pretty interesting, thanks Dave! I'm curious to see the results, but how will you measure the relative attenuation?

Is this a question? Click here to post it to the Questions page.


@warren, hey jeff, I'm working on an experiment that will clearly show if there is any difference between the two.


@warren, hey jeff here is the experiment I ran that does show there is a difference between the acetate film strips Plab sells and the open-air slit I constructed the other day, here is the link to the research note,

http://publiclab.org/notes/dhaffnersr/08-20-2016/eem-2d-spectrums-showing-evidence-of-attenuation-from-imperfections-in-acetate-film-strips


You must be logged in to comment.