Laser Machining with Modulated Zone Plates

Engel, Andréas; Steffen, J.; Herziger, G.

doi:10.1364/ao.13.000269

Cited by 24 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It will now be proved that the expression for the IDP amplitude given by equation (31) may be simulated by the optical data processing system shown in figure 2 .…”

Section: Optical Computing Of Idpsmentioning

confidence: 99%

See 1 more Smart Citation

Generalized Curvilinear Diffraction Gratings: I. Image diffraction patterns

Lee

1983

Optica Acta: International Journal of Optics

View full text Add to dashboard Cite

This paper is the first in a series on the diffraction and imaging properties of generalized curvilinear diffraction gratings . The`image diffraction pattern' (IDP) of a generalized grating is defined as the optical image that is observed by the naked eye focused on the grating when it is illuminated by an arbitrarily extended diffuse source . In this paper, a general theory of the IDP is derived in both the scalar wave and geometric optics approximations .As an application of the theory, it is shown how the IDP of a generalized grating may be simulated by an optical data processing system in which the Fresnel transform ofa low line density representation ofthe grating is filtered by an aperture ofthe same shape and orientation as the source . The theory is shown to lead to a simple explanation ofthe moire effect first observed by Hamann and to a new technique for performing optical map transformations . As a practical test on the theory, the IDP of a circular diffraction grating is calculated and shown to be in good agreement with experiment.

show abstract

“…It will now be proved that the expression for the IDP amplitude given by equation (31) may be simulated by the optical data processing system shown in figure 2 .…”

Section: Optical Computing Of Idpsmentioning

confidence: 99%

“…Beam scanners of this type used in conjunction with high-powered CO 2 lasers can be used for laser machining [29] . Alternative schemes using static gratings of the zone plate type have also been proposed [30,31] .…”

Section: Introductionmentioning

confidence: 99%

Generalized Curvilinear Diffraction Gratings: I. Image diffraction patterns

Lee

1983

Optica Acta: International Journal of Optics

View full text Add to dashboard Cite

show abstract

“…Construction is based on a binary phase hologram [8] which can be played back in either reflection or transmission (thus deep IR imaging is possible). Engel's work [11] -similar to the work done here -was based on phase only "zone" plates used in transmission and reflection with efficiencies of 10 and 40% respectively. The holograms suffered from the usual field size dependence aberrations and are at most only 40% efficient.…”

Section: Introductionmentioning

confidence: 96%

Binary Phase Gratings for Materials Processing

Patt

1990

Journal of Laser Applications

View full text Add to dashboard Cite

The feasibility of using a diffractive optical element, a phase grating, as a beam handling device for use in industrial laser material processing is examined. The binary phase grating is an efficient beam splitting device and is useful in many materials processing operations (welding, cutting, soldering, drilling) where a high degree of parallelism could significantly improve process throughput.Overall efficiency of etched quartz binary gratings agrees well with published predictions (nominal 70-90%).Copies of the grating formed in PMMA (acrylic) survived preliminary life tests (more than 1000 9-J pulses from a commercial multimode Nd-Glass laser) with no measurable change in performance. Conventional Small Outline (SO) IC electronic packages were both laser soldered and welded to substrates with one laser pulse.Beam splitting uniformity of desired images is within 10% for the original quartz gratings and for some PMMA copies. Conventional doublet achromat and pianoconvex lenses are adequate for maintaining 10% uniformity of intensity. Splitting uniformity is experimentally evaluated with energy and focused spot (burn) tests on kapton (polyimide) and thin and thick metal samples using a pulsed industrial Nd laser.

show abstract

“…To achieve this one must be able to generate the predetermined phasefront with an accuracy better than degrees. Successful laser machining with binary surface relief kinoforms was reported during the seventies [2,3]. With binary kinoforms, which generate arbitrary intensity patterns, the maximum diffraction efficiency can not exceed 40.5 %, however.…”

Section: Introductionmentioning

confidence: 99%