Machining Nonconventional-Shaped Optics

Arnold, J. B.; Sladky, R. E.; Steger, P.J.; Woodall, N. D.; Saito, Theodore T.

doi:10.1117/12.7972052

Cited by 2 publications

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“…The positive sign in Eq. ͑12͒ is for the axicon lens, 1,6 where all rays cross the optical axis as shown in Fig. 1, and the minus sign is for the vaxicon lens, where no rays cross the optical axis as shown in Fig.…”

Section: The Constancy Of Optical Lengthmentioning

confidence: 99%

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Shaping of annular laser intensity profiles and their thermal effects for optical trepanning

2006

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Laser drilling is very important in many industries such as automotive, aerospace, electronics, and materials processing. It can be used to produce critical components with novel hole geometry for advanced systems. Percussion drilling and trepanning are two laser drilling methods. In the conventional trepanning method, a laser beam is scanned along a circular or spiral orbit to remove material to achieve a desired hole shape. These orbits generally trace a circular path at the inner wall of the holes. This suggests that an annular beam can be used to accomplish trepanning, a technique we refer to as optical trepanning. The ray-tracing technique of geometrical optics is employed in this paper to design the necessary optics to transform a Gaussian laser beam into an annular beam of different intensity profiles. Such profiles include uniform intensity within the annulus, full Gaussian with maximum intensity, and half Gaussian with maximum intensities at the inner and outer surfaces of the annulus.

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Section: The Constancy Of Optical Lengthmentioning

confidence: 99%

“…It should be noted that a waxicon ͑w-axicon͒ lens is a compound axicon lens with a w-shaped cross section. 1,6 Likewise, the term vaxicon is used in this study to designate a v-shaped conical lens ͑v-axicon͒. The optical path length for all the rays must be the same, i.e.,…”

Section: The Constancy Of Optical Lengthmentioning

confidence: 99%

Shaping of annular laser intensity profiles and their thermal effects for optical trepanning

2006

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Quantitative evaluation of performance of three-dimensional printed lenses

2017

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We present an analysis of the shape, surface quality, and imaging capabilities of custom 3D printed lenses. 3D printing technology enables lens prototypes to be fabricated without restrictions on surface geometry. Thus, spherical, aspherical and rotationally non-symmetric lenses can be manufactured in an integrated production process. This technique serves as a noteworthy alternative to multistage, labor-intensive, abrasive processes such as grinding, polishing and diamond turning. Here, we evaluate the quality of lenses fabricated by Luxexcel using patented Printoptical© technology that is based on an inkjet printing technique by comparing them to lenses made with traditional glass processing technologies (grinding, polishing etc.). The surface geometry and roughness of the lenses were evaluated using white-light and Fizeau interferometers. We have compared peak-to-valley wavefront deviation, root-mean-squared wavefront error, radii of curvature and the arithmetic average of the roughness profile (Ra) of plastic and glass lenses. Additionally, the imaging performance of selected pairs of lenses was tested using 1951 USAF resolution target. The results indicate performance of 3D printed optics that could be manufactured with surface roughness comparable to that of injection molded lenses (Ra < 20 nm). The RMS wavefront error of 3D printed prototypes was at a minimum 18.8 times larger than equivalent glass prototypes for a lens with a 12.7 mm clear aperture, but when measured within 63% of its clear aperture, 3D printed components’ RMS wavefront error was comparable to glass lenses.

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Machining Nonconventional-Shaped Optics

Cited by 2 publications

References 0 publications

Shaping of annular laser intensity profiles and their thermal effects for optical trepanning

Shaping of annular laser intensity profiles and their thermal effects for optical trepanning

Quantitative evaluation of performance of three-dimensional printed lenses

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