Have you considered to use the USB charger cable poker scanner for barcode marked playing cards?
We can fix a camera lens inside of the USB charger cable? With the concealable poker card reader inside, you can use it to detect the barcode luminous ink marked playing cards well.
There are lots of poker players are looking for the hidden poker spy card reader from us. So we processed this kind of USB data camera to satisfy their demand. When you charge your cell phone, you have to use USB data. 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 that usually used for charging cell phone.