RT Journal Article T1 Quality improvement of partially coherent symmetric-intensity beams caused by quartic phase distortions A1 Piquero Sanz, Gemma María A1 Martínez Herrero, María Rosario A1 Mejías Arias, Pedro Miguel AB The effects that quartic phase distortions produce in the beam-quality parameter of partially coherent symmetric-intensity beams are studied. An analytical expression for the beam-quality parameter at the output plane of a pure phase plate with quartic phase aberration has been derived. Explicit conditions to improve the beam quality are provided, and the corresponding optimized beam-quality value that can be attained for a given field has been determined. PB The Optical Society of America (OSA) SN 0146-9592 YR 1992 FD 1992-12-01 LK https://hdl.handle.net/20.500.14352/58857 UL https://hdl.handle.net/20.500.14352/58857 LA eng NO © 1992 Optical Society of America.We acknowledge the financial support of the Comisión Interministerial de Ciencia y Tecnología of Spain under Project ROB90-53. NO Comisión Interministerial de Ciencia y Tecnología of Spain DS Docta Complutense RD 21 abr 2025