Phase discriminator

A phase discriminator is a device used to regulate the flow of energy fields. Using a phase discriminator, one can create a selectively permeable screen, allowing some objects, particles, or EM waves to go through while blocking others whose phase properties are undesirable.

These devices have a variety of applications:

• Positronic decompiler of the Soong type android
• Star Fleet Emergency transporter armbands contain a type-7 phase discriminator.