Hey guys, Mech engineer here looking for some basic optical advice. I'm going to be measuring several brands of lights output to certain wavelengths (red and blue) and i plan on purchasing, having made, how ever i need to go about it, a couple filers for the lights so i can test their output in the specific spectrum. My issue is, I'm using photo transistors (filtered to the visible spectrum) to measure the power output and i would need to make sure that my filters are not diffracting light elsewhere unless its by the same amount on all of the filters. I assume I'm going to have to use colored class & as far as I understand it, i would need to polish the glass to a very clean finish. But I'm unsure if this is how i ensure that the output is the same across all of the filters i have made. Any thoughts on how I can make comparable light energy output filters of different colors? Essentially i want to have as little light loss as it is filtered through the glass & need all filters to be the same standard of light loss.
sorry if this is long winded or confusing. Thanks for your time.
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