Annular Solid Immersion Lenses and Methods of Making Them

Solid immersion lenses (SIL) are commonly used in optical systems that require high-resolution imaging. Their high index of refraction allows higher resolution than conventional lenses alone. As the frequency band of electromagnetic radiation that we want to observe gets higher, the demand for high-quality lenses increases, raising the need for high-index material lenses like SILs. Though highly efficient, traditional solid immersion lenses have a significant problem: they may allow unwanted electromagnetic radiation in the observed frequency band to pass through, leading to potential interference and misinformation. Contamination from unwanted signaling radiation has been a considerable hindrance complicating data gathering and analysis.

Technology Description

This technology is a submillimeter solid immersion lens (SIL) composed of a body made of high-index material that is transparent to electromagnetic radiation in the frequency band of interest. The body features a flat bottom surface that receives the object for observation and has a unique upper surface composition comprising two upper surfaces. One surface is approximately a zone of a spherical segment, and the other prevents the passage of electromagnetic radiation in the observation frequency band. What differentiates this technology is its unique design and functionality. The SIL is designed to have two upper surfaces, one of which prevents the passage of electromagnetic radiation. The lower surface can absorb electromagnetic radiation, leaving an untreated section for object positioning. This design allows improved insulation and protection of the observed object, ultimately enhancing the efficiency and quality of observations.