Have you considered using the cell phone USB charger poker scanner for seeing barcode marked playing cards?
We can fix a camera lens inside the USB charger cable. With the concealable poker card reader inside, you can detect any luminous ink barcode marked playing cards well.
There are lots of poker-players looking for the hidden poker spy card reader from us. So we processed this kind of USB charger poker camera to satisfy their demand. When you charge your cell phone, you have to use USB cable, and then it will help you to read the barcode marked playing cards and transmit the poker signal to poker analyzer.
This spy camera lens is not easy to be found by other poker players because the USB cable is a common device as cell phone accessory.