Principles of Optimization

Groß, Herbert; Zügge, Hannfried; Peschka, Martin; Blechinger, Fritz

doi:10.1002/9783527699254.ch4

Cited by 2 publications

(3 citation statements)

References 39 publications

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“…In the axial direction, the Rayleigh criterion can be applied with the simplified formula derived as ð Á nÞ=NA 2 for axial resolution, where n is the refractive index of the immersion medium. 17) Calculated axial resolutions are 500 nm for the 100Â/NA 0.9 objective and 310 nm for the 100Â/NA 1.4 objective.…”

Section: Methodsmentioning

confidence: 95%

Amplitude and Phase Measurements of Highly Focused Light in Optical Data Storage Systems

Kim

Scharf

Herzig

2010

Jpn. J. Appl. Phys.

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We propose a new measurement technique to investigate the highly focused light used in optical data storage systems named immersion high resolution interference microscopy (HRIM). This system allows three-dimensional (3D) measurements of the amplitude and phase of light fields in a static scheme. In contrast to scanning techniques, HRIM allows the nondestructive investigation penetrating through the optical disc. We investigated the focusing of light in high-definition digital versatile disc (HD DVD) systems. The experimental spot sizes agree well with the theory in intensity measurements. The measured phase distributions resemble the wavefront propagation of aberration-free converging light beams. The observed phase singularity positions near the focal plane demonstrate the super-resolution capability of such measurements and give access to details of the Airy pattern. Our results prove the applicability of studying highly focused beams in advanced optical systems and its use to clarify storage mechanisms for future generations of optical memories.

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Section: Methodsmentioning

confidence: 95%

Amplitude and Phase Measurements of Highly Focused Light in Optical Data Storage Systems

Kim

Scharf

Herzig

2010

Jpn. J. Appl. Phys.

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“…2) was designed on the basis of ray theory. 10) Here, the source at infinity, the refractive index of the lens, the back focal length, and the effective diameter were assumed.…”

Section: Underwater Acoustic Lensmentioning

confidence: 99%

“…Then, we used the even-ordered aspheric equations [eq. ( 1)], 11) and determined the coefficients in the equation by the method of least squares.…”

Section: Underwater Acoustic Lensmentioning

confidence: 99%

Imaging Performance Evaluation Method of Wide-View Underwater Acoustic Lens by Geometrical Skew Ray Analysis

Matsumoto

Takeyama²,

Tsuchiya

et al. 2010

Jpn. J. Appl. Phys.

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In the image formation performance of an underwater acoustic lens, the use of geometrical skew ray analysis for usually use in optical lens design field was examined. We measured acoustic pressure fields through a single lens, from which the acoustic energy distribution was obtained by using encircled energy. On the other hand, the analyzed acoustic energy distribution was evaluated by geometrical skew ray analysis under the measurement condition including the apodization of the source and effect of water temperature. We compared the measured and analyzed convergence positions, which the diameter of 80% of total amount of acoustic energy is the minimum. Then the both convergence positions correspond. As a result, it was shown that the image performance evaluation of a wide-view acoustic lens by geometrical skew ray analysis is useful.

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Principles of Optimization

Cited by 2 publications

References 39 publications

Amplitude and Phase Measurements of Highly Focused Light in Optical Data Storage Systems

Amplitude and Phase Measurements of Highly Focused Light in Optical Data Storage Systems

Imaging Performance Evaluation Method of Wide-View Underwater Acoustic Lens by Geometrical Skew Ray Analysis

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