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1 Sheared wavefronts of the wavefront from the micro-objective in the (a)  $ x $ x direction and (b)  $ y $ y direction.
2 (a) Measured signal beam profiles and polarization projections at the OPA output. By slightly detuning the orientation angle from ${\alpha _{\rm WP}} = {28.7}^\circ$ α W P = 28.7 ∘ to $\alpha = {28.9}^\circ$ α = 28.9 ∘ , the OPA crystal is made to function as a quarter-wave plate. (b) The same measurements as in (a), but with compensation for the wave plate effect. Another BBO crystal, identical to the OPA crystal, is placed orthogonally in the seed signal beamline.
3 POM images at different focal planes: (a) 11.91, (b) 12.13, (c) 12.34, (d) 12.55, (e) 12.78, and (f) 12.99 mm.
4 Evolution history of the unit cell topology for maximizing the seventh band gap of PhCs under TM mode. Obtained topologies after (a) the first, (b) the second, (c) the fourth, (d) the sixth, (e) the eighth sub-optimization problems, and (f) the final optimum.
5 Wavefront nephogram of the system under 4°C uniform temperature rise load.
6 Contours of radiation intensity and degree of polarization in the hemisphere space at point A for different scattering albedos of 1, 0.7, 0.4, and 0.1 with the bottom surface albedo $\rho = 1$ ρ = 1.
7 Nephogram of mirror surface after removing rigid body displacements: (a) 1 g $ x $ x -direction gravity; (b) 4°C uniform temperature rises; (c) 1°C axial temperature difference, and the upper surface has a lower temperature; (d) 1°C radial temperature difference, and the inner rim has a lower temperature, because the upper surface and inner rim are closer to the space environment.
8 Experiments on a 1-bit defocusing projecting measuring system. (a) One of the captured deformed fringe pattern. (b) Original wrapped phase. (c)-(d) Staggered wrapped phases. (e) Fringe order. (f) Reconstructed absolute phase using the traditional phase unwrapping method. (g) Reconstructed absolute phase using the proposed generalized Tri-PU method. (h) Divided tripartite regions of fringe order. (i) Enlarged subimage in (f). (j) Enlarged subimage in (g).
9 Schematic representation of the imaging and quantification protocol: (a) images of two histology slides containing serial tissue sections, two stained with H&E (upper slide), and two unstained (lower slide, with the arrows indicating the position of the tissue sections); (b) large image depicting one H&E-stained tissue section; (c) image sets acquired on slides containing breast tissue; (d) polarization angle vs. SHG intensity (color-coded, with frames from 0 to 10 corresponding to polarization angles from 0° to 180° in steps of 20°) and images obtained from the FSHG image set and corresponding histograms; (e) image sets acquired on slides containing epithelial tissue. For (c) and (e) the MPM images are pseudo-colored: blue-color for FSHG, green-color for BSHG and red-color for autofluorescent tissue regions (probed by TPEF).
10 Residual maps from polishing the lattice backed mirror. The locations of each map: (a) 12 o’clock, (b) 3 o’clock, (c) 6 o’clock, and (d) center. The peripheral samples (a)–(c) are at the same radial distance, which is equal to the mounting radial distance.
11 Reconstructed wavefronts (left) and errors (right) of the three methods when reconstructing a wavefront containing high spatial frequency information. (a), (b) The FFT method; (c), (d) the LSQ method; (e), (f) the DZF method.
12 Customizing speckles for nonlinear pattern illumination. (a) Experimentally recorded speckle pattern that illuminates and photoconverts a uniform fluorescent protein sample. Within the white box, the speckles obey delta statistics, and outside they obey Rayleigh statistics. (b) Experimentally recorded image of the fluorescence from the unconverted regions shows isometric and isotropic spots produced by the vortices in the delta speckles; the region photoconverted by the Rayleigh speckles features large, irregular, and interconnected fluorescent grains.