Described are autofocusing algorithms and system implementations for machine inspection applications. An evaluation device for processing the measurement signal is connected to the measurement signal output. This allows performing color calibration with high color reproducibility using suitable color parameter values according to a change in an illumination condition as well as allows substantially reducing an amount of data required to determine the suitable color parameter values. A second frame member is attached to the first frame member and is adjustable about a second axis that extends generally parallel with the first plane. In a preferred embodiment of the invention, the fragrance is encapsulated by a first polymer material to form a fragrance encapsulated polymer, the polymer encapsulated shell is then coated with a mixture of cationic polymers, in a preferred embodiment the coating polymers are a reaction product of polyamines and oxirane or oxirane.