Abstract: A rifle scope target enhancement filtration filter device wherein the ambient spectra's expected target reflected spectra is enhanced and the ambient spectra's expected background reflected spectra is lessened by thin film coatings on the plastic or glass filter is disclosed.

Abstract: A method of producing spectral gradient filters using surface applied array optimized 3D shadow masks by placing the shadow mask on the surface of the wafer substrate using a technique such as 3D printing, and by also using spatial algorithms to shape each mask aperture individually is disclosed.

Abstract: A new color wheel filter system for color changing lighting fixtures is disclosed. More specifically it is a method of improving the filter wheel functionality through use of an improved filter wheel design by maximizing the filter clear aperture by directly bonding the filter glass substrate to a small hub bearing and moving the drive belt to the outside diameter. The filter wheel can also be constructed to allow easy interchanging of layered filter wheels on the color changing lighting fixture.

Abstract: A combination patterned reflective dichroic filter and optical coating, and method of making the same, is disclosed by starting with a filter substrate, laying down a pattern of dichroic filter material, but stopping short of completing the layers required for the spectral characteristics of the filter. The spectral characteristics are completed by adding a blanket coating of a material such as an anti-reflective material. In an alternative embodiment the blanket coating can be applied prior to addition of the dichroic filter material.

Abstract: An improved LED using patterned coated dichroic filters. More specifically a method for placing, during the wafer fabrication, patterned dichroic filters between the LED chip and phosphor layer to increase luminous efficiency and lower thermal load, and/or over the phosphor layer for spectral shaping and reduction of color temperature shift with viewing angle.

Abstract: An environmentally stable Silver containing mirror or thin-film optical filter having very high reflection values over a large spectral and angular range, and a method for constructing the mirror, or thin-film optical filter, comprising using a substrate that has been exposed to an Argon rich ion stream to prepare the surface. A medium index material is then deposed on the surface with Argon ion bombardment. The Silver is then deposited until it is opaque. A second deposition of the medium index material is next done with the Argon ion bombardment. The coating is then followed with a standard ion assisted deposed optical film to maximize reflection at the desired wavelength and angle of incidence.

Abstract: An environmentally stable Silver containing mirror or thin-film optical filter having very high reflection values over a large spectral and angular range, and a method for constructing the mirror, or thin-film optical filter, comprising using a substrate that has been exposed to an Argon rich ion stream to prepare the surface. A medium index material is then deposed on the surface with Argon ion bombardment. The Silver is then deposited until it is opaque. A second deposition of the medium index material is next done with the Argon ion bombardment. The coating is then followed with a standard ion assisted deposed optical film to maximize reflection at the desired wavelength and angle of incidence.

Abstract: A variable bandwidth tunable optical filters comprised of two transparent optical substrates, upon each of which is deposited a linearly variable multilayer interference filter coating which varies in total thickness from end to end in a wedged fashion. This wedge imparts a corresponding variation of the center wavelength of the filter bandpass with respect to the linear position of the coated filter substrates. The variable bandpass tunable filter can be adjusted to a specific center wavelength by moving the filter pair together linearly through the incident beam. The bandwidth of the filter pair is maximized when the two filters are spectrally aligned, and is determined by the bandwidth of the individual filters. The variable bandwidth of the tunable filter can be adjusted by introducing a relative linear offset between the linearly variable filter pair.