TAO Shaohua, TIAN Yong-Hong, CHEN Pei-Feng, QIU Jun-Lin . Methods of Improving a Laser Beam's Depth of Focus with Diffractive Optical Elements[J]. Editorial Office of Optics and Precision Engineering, 1998,(3): 70-73
TAO Shaohua, TIAN Yong-Hong, CHEN Pei-Feng, QIU Jun-Lin . Methods of Improving a Laser Beam's Depth of Focus with Diffractive Optical Elements[J]. Editorial Office of Optics and Precision Engineering, 1998,(3): 70-73DOI:
Placing a diffractive optical element(DOE) on the incident laser beam to improve the depth of focus
the DOE'S aperture is variable.When the radius of the aperture changes
the depth of focus changes too.The DOE's phase distribution can be determined by the input beams's and the output beam's amplitude distributions with a Y G algorithm.The results of computing show that the depth of focus is much larger than that of without DOE.