This might not be a problem for most low-energy OPCPA systems where the pump laser sources are diffraction-limited
or in a type 0 ([e.sub.p] [right arrow] [e.sub.s] + [e.sub.i]) quasi-phase-matching OPA process without spatial walk-off between interacting waves [22,23].
It uses LED light sources, Semrock filters, advanced optical engineering and CMOS sensors to provide near diffraction-limited
In recent years, interest has increased in pushing the diffraction-limited
spatial resolution performance of FTIR imaging systems, primarily using synchrotron-based systems.
Raven's MOAO system delivers images with roughly 0.15-arcsecond resolution --better than the typical 0.5-arcsecond achievable without AO, but not diffraction-limited
. The resolution is worse than the 0.05 arcsecond of Keck, which observes in near-infrared as Subaru does and is often the gold standard for AO results.
Rossi (4), give for the diffraction-limited
resolution of light passing through a circular aperture.
(a) Second-generation optical-resolution photoacoustic microscopy system (2G-OR-PAM), where the lateral resolution is determined by the diffraction-limited
However, a number of recent advancements in optical imaging techniques are able to improve the ability of light to propagate through tissues with diffraction-limited
(18) A similar diffraction-limited
technique called total internal reflection fluorescence microscopy generates a near-field wave at the surface of a specimen.
--the [M.sup.2] factor, defined as the beam parameter product divided by the corresponding product for a diffraction-limited
Gaussian beam with the same wavelength (Paschotta, 2004).
The growth of the central saturated area in figure (9, 12 and 13) is purely related to optical effects and can be described mathematically using the diffraction-limited
point spread function.
Instead of scanning a diffraction-limited
laser spot across the sample, a spinning disk with multiple holes uses a light source to produce high-speed, nondiffracted images, resulting in highly accurate, real-time imaging of cells or tissue.