Optical Sensor Signal Adjustment for Spectral Precision

The patent changes the approach from physical filtering (multiple coatings) to signal processing (algorithmic adjustment). The processing unit receives output signals from multiple optical sensors with different spectral responses and uses predefined adjustment parameters to compute a corrected signal that approximates the ideal spectral response. This transforms the problem from optical domain to electrical domain, reducing physical complexity while maintaining precision.

The patent replaces the mechanical/optical system of multiple physical filters and coatings with an electrical/electronic signal processing system. Instead of using multiple optical filters to achieve spectral separation, the system uses electronic sensors with known spectral characteristics and processes their outputs through mathematical operations to achieve the desired spectral response, thereby reducing device complexity.

The patent shifts the complexity from manufacturing (multiple precision coatings) to programming (adjustment parameters). The sensors can be manufactured with standard, less expensive materials and coatings, and the precise spectral response is achieved through software-based signal adjustment using predefined parameters stored in memory, thereby reducing manufacturing costs.

The patent replaces expensive multi-layer optical filtering structures with a more economical electronic signal processing system. The manufacturing cost is reduced by using simpler sensor coatings and replacing complex optical filtering hardware with programmable signal adjustment algorithms executed by a processing unit.

The patent makes the signal adjustment system universal by using multiple optical sensors with different spectral characteristics (including sensors sensitive to different wavelength ranges). The processing unit combines their outputs using adjustment parameters to achieve the desired spectral response, making the system capable of handling various interference types (blue, green, infrared) through a single multi-functional approach rather than requiring separate filtering solutions for each wavelength range.

The patent uses parameter-based signal adjustment to compensate for the insufficient infrared filtering capability of conventional blue/green light blocking materials. By receiving signals from multiple sensors and applying predefined adjustment parameters, the system can mathematically eliminate infrared interference effects even when physical filters are inadequate, thereby achieving precise red light detection without effective infrared optical filtering.