Spectral Target for Macroscopic and Microscopic Reflectance Imaging

摘要

A spectrally selective (e.g., color) target has been designed and fabricated for reflectance micro- and/or macro-imaging that utilizes microlens arrays and color mirrors. The color mirrors are optical interference coatings. The microlenses are designed and fabricated such that the light reflected from the color mirror is incident onto the detector. This system of microlenses and color mirrors allows the user to image different colored specular highlights. An infinite number of spectral reflectance profiles can be created with these color targets and used for spectral and colorimetric imaging applications. The targets are not limited to the visible region; they can also be designed to work in the ultraviolet and infrared wavelength regions.