Pretty Clever method to focus IR vs use of more expensive Laser technology...brings back memories of school...but much more interesting.
For anyone interested in IR protocols - we have just launched a Crowdfunding campaign on IndieGoGo for AnalysIR - IR Decoder & Analyzer (Arduino & Raspberry Pi). Currently we support 17 IR protocols and are looking for more to add as part of the campaign. Suggestions Welcome! You can find out more about the Campaign on http://bit.ly/1b7oZXH or Screenshot via www.AnalysIR.com