Broadband Infrared Microscope ObjectivesTechnology #ua17-162
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Title: Optical Design for Broadband Applications
Invention: Researchers at the University of Arizona have developed a microscope objective design that broadens the high-resolution, high NA spectral bandwidth, and also extends the spectral band into the infrared. Chromatics aberrations are solved for broad regionas such as visible through near-infrared, and from short-wave infrared through long-wave infrared. Furthermore, compared to conventional objectives, there are fewer elements, more relaxed tolerances, and the ability to use a single material. Models have demonstrated the performance of a single-material, 6-element system that is chromatically corrected through the spectral region of 2 microns to 12 microns.
Background: For broadband microscope objectives, chromatic change of focus and magnification are among the most difficult aberrations to solve in the design process. Secondary and tertiary axial color aberrations usually prevent good performance in broadband designs. State-of-the-art high NA microscope objectives in UV-NIR or VIS-SWIR band depend on precisely controlling the properties of glass material, and place high demands on advanced manufacturing and metrology techniques. Those available on the market are usually very expensive.
* Fewer elements, and single, or at most two ,materials
* Relaxed tolerances
* Less expensive to manufacture
* Chromatic aberrations minimized over broad wavelength bands
* High NA objective lenses
* Microscope objectives
* Vis-NIR; NIR - SWIR; and SWIR - LWIR applications
Refer to case number UA17-162