Abstract: The present invention pertains generally to a combination of optical elements integrated into a singular unit to perform one or more functional operations upon an electromagnetic radiation emission conveyed through said unit, and more particularly, a plurality of optical elements that are durably integrated into a modular optical package, wherein said modular optical package is adaptive to a releasable mounting mechanism and has the capability to maintain an independently controlled microenvironment. An electromagnetic radiation emission in introduced into the modular optical package through at least one ingress portal and upon modification by the internal optical elements, exits the modular optical package through at least one egress portal. A microenvironment is maintained within the enclosure of the modular optical package such that humidity, temperature, atmospheric composition, particulates, and out-gassing contaminants are controlled.