Nonlinear optical formation of a virtual pinhole combined with upconversion enables mid-infrared lensless imaging with large depth of field and depth resolution.
Infrared chemical imaging through non- degenerate two-photon absorption in silicon-based cam- 10 eras,
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Mid-infrared nonlinear pinhole imaging
Nonlinear optical formation of a virtual pinhole combined with upconversion enables mid-infrared lensless imaging with large depth of field and depth resolution.