So I'm thinking of getting this 50mW 808nm line laser module at 120 degrees from amazon:
http://www.amazon.com/Adjusted-Infrared-Focusable-12x35mm-Degrees/dp/B00T7O4YE8/ref=sr_1_1?ie=UTF8&qid=1442462491&sr=8-1&keywords=adjusted+infrared+808nm#descriptionAndDetails
My question is, what would be...