Quantity   Component name
1 × Adafruit Feather 32u4 BT LE Decided on this rather than the Pi Zero W
1 × ~15mm polarized beam splitting prism cube many "defective" (e.g. non-scientifically viable & affordable) prisms of this sort can be found on ebay for around $40
1 × Adafruit 500mA LiPo 500mAh?
1 × Small mosaic mirrors, available at most craft stores
1 × Google Cardboard lense, sanded to a square shape not sure what focal distance these are, just eyeballed it (lol)