So-called Rare Earth's are cause for concern only in large scale manufacturing of consumer goods. For small scale manufacturing of Night Vision for military purposes, there is no shortage.
Night Vision optics vary widely in quality and development. The advantage of Night Vision, whether it be photon amplification based, thermal based, or fused, is stealth. Passive target acquisition and successful engagement will favor the force that has the highest quality and most sensitive equipment.
The US government strictly guards critical Night Vision technology as witnessed in the following links:
Night Vision optics vary widely in quality and development. The advantage of Night Vision, whether it be photon amplification based, thermal based, or fused, is stealth. Passive target acquisition and successful engagement will favor the force that has the highest quality and most sensitive equipment.
The US government strictly guards critical Night Vision technology as witnessed in the following links: