Fig. 2: Scheme of the BSTP microscope.
From: Bond-selective transient phase imaging via sensing of the infrared photothermal effect
a Illustration of the BSTP microscope. A common-path diffraction phase microscope was built on an inverted microscope, and an IR beam was introduced for BSTP imaging. AOM: acousto-optical modulator. P1, P2: gold parabolic mirrors. OL: objective lens. L0, L1, L2: lenses. G: grating. PH: pinhole. b Timing diagram. td: delay of the probe pulse relative to the start of the IR pulses in each burst. c Clock hierarchy.
