  Mid-infrared spectroscopy probes molecular vibrations to identify chemical
species and functional groups. Therefore, mid-infrared hyperspectral imaging is
one of the most powerful and promising candidates for chemical imaging using
optical methods. Yet high-speed and entire bandwidth mid-infrared hyperspectral
imaging has not been realized. Here we report a mid-infrared hyperspectral
chemical imaging technique that uses chirped pulse upconversion of sub-cycle
pulses at the image plane. This technique offers a lateral resolution of 15
$\mu$m, and the field of view is adjustable between 800 $\mu$m $\times$ 600
$\mu$m to 12 mm $\times$ 9 mm. The hyperspectral imaging produces a 640
$\times$ 480 pixel image in 8 s, which covers a spectral range of 640-3015
cm$^{-1}$, comprising 1069 wavelength points and offering a wavenumber
resolution of 2.6-3.7 cm$^{-1}$. For discrete frequency mid-infrared imaging,
the measurement speed reaches a frame rate of 5 kHz, the repetition rate of the
laser. As a demonstration, we effectively identified and mapped different
components in a microfluidic device, plant cell, and mouse embryo section. The
great capacity and latent force of this technique in chemical imaging promise
to be applied to many fields such as chemical analysis, biology, and medicine.
