Abstract: Various methods and systems for monitoring one or more characteristics of a fluid in a mechanical device are disclosed herein. In at least one embodiment, the system includes an optical sensor including an excitation light aperture and an emission light aperture. The excitation light aperture transmits an excitation light to the fluid and the emission light aperture receives an emission light from the fluid. The system may further include an inductive sensor including a printed circuit board including a first field coil trace, a second field coil trace, and a sense coil trace. The methods disclosed include transmitting the excitation light to the fluid; receiving the emission light from the fluid; and operating a processor to obtain one or more fluorescence spectra based on the received emission light; and determine a fluid condition indicator and/or a remaining useful life of the fluid based on the one or more fluorescence spectra.

Abstract: A system, method for creating an optical device, and a device to inhibit short- and medium-visible wavelengths and to color neutralize such device are disclosed. The system, method for creating the optical device, and device include a substrate, a plurality of thin film layers provided on the substrate, the plurality of thin film layers including materials creating thin film-specific transmission spectra based on selected pluralities of materials each having their on respective refractive index, and/or a plurality of colorant layers applied to the plurality of thin film layers, the plurality of colorant layers including at least one colorant, the colorant created based on colorant-specific attenuation spectra as defined by selected concentrations.