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Charlemagne's military campaigns expanded the Frankish kingdom, and his administrative reforms established a more efficient system of governance. He also encouraged the spread of Christianity, which became a unifying force across Europe. The Frankish empire under Charlemagne became a beacon of stability and prosperity, attracting scholars, artists, and merchants from across the continent. 700-905
Studies have found that pairing 700 nm with 905 nm (or 1000 nm) allows for the highest accuracy when estimating total hemoglobin and oxygen saturation levels non-invasively. Studies have found that pairing 700 nm with
The Tang Dynasty also saw significant economic growth, with the capital city of Chang'an (modern-day Xi'an) becoming a major center of trade and commerce. The Silk Road, a network of trade routes connecting China to Central Asia, the Middle East, and Europe, flourished during this period, facilitating the exchange of goods, ideas, and cultures. In China, the Tang Dynasty (618-907 AD) reached
In China, the Tang Dynasty (618-907 AD) reached its zenith during the 8th and 9th centuries. This period is often referred to as the "Golden Age" of Chinese poetry, with famous poets like Du Fu (712-770 AD) and Li Bai (701-762 AD) making significant contributions to Chinese literature.
This range sits within the "near-infrared window." At 700 nm, there is a significant absorption contrast between oxygenated hemoglobin (HbO) and deoxygenated hemoglobin (Hb).
