Fig. 5.

Resolution, image quality, and illuminated area at different intersection angles. Conventional wide-field image (summedWF), SIM image (SIall), and the power spectra of the SIM image (PS_SIall). The drawings overlaying the spectra indicate the extended frequency information in the SIall images and the achievable rotation angle of the pattern. The orange circles represent the optical transfer function (OTF) region, whose radius is 2 N.A.∕λ (N.A. = 1.0, λ = 515 nm). The white arrows represent the corresponding illuminated areas. The top view illustrates the configuration of two light sheets at 0° pattern orientation. The intersection angles of the 0° pattern in A, B, and C are 73.4°, 99.8°, and 180°, respectively, which result in pattern periods of 307, 240, and 183 nm, respectively.