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. 2019 May 16;10(6):2847–2860. doi: 10.1364/BOE.10.002847

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© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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Fig. 3 — The system transverse resolution was tested by the use of a standard USAF resolution target. (A-C) Resultant en-face images of the resolution target imaged with various beam diameters: A) 1.12 mm; B) 2.51 mm; and C) 3.50 mm, respectively. Small sub-frames on the right show the zoomed-in views for patterns of group 6 and 7. The small yellow arrows denote the minimum visually resolvable pattern for each beam size. (D) Normalized vertical (up) and horizontal (down) intensity profiles of USAF resolution target patterns (group 5) imaged by the beam diameter of 1.12 mm. (E) Normalized vertical (up) and horizontal (down) intensity profiles of USAF resolution target patterns (group 6) imaged by the beam diameter of 2.51 mm. (F) Normalized vertical (up) and horizontal (down) intensity profiles of USAF resolution target patterns (group 7) imaged by the beam diameter of 3.50 mm.