Bandpass filters and light-blocking guides isolate photodiodes for accurate, lower-cost color measurement across visible, IR, and UV bands.
Stop layers shift cavity thickness control from etch depth to deposition, improving passband accuracy and cutting multi-spectral filter build time.
A nested filter layout blocks stray light and improves package temperature uniformity to raise S/N ratio and resolution.
An external band pass filter and thicker window block side-entry stray light and stabilize package temperature for higher S/N and resolution.