Diffractive Optic Synthesis and Analysis of Light Fields and Recent Applications

Kim, Hwi; Choi, Kihwan; Lee, Byoungho

doi:10.1143/jjap.45.6555

Cited by 11 publications

(8 citation statements)

References 102 publications

(177 reference statements)

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“…The design of CGH is a subject that has been studied for more than forty years and a variety of techniques have been developed [3,4]. Here we have considered two fabrication limitations.…”

Section: Fabrication Procedures and Cgh Designmentioning

confidence: 99%

“…Many different technologies have been used to fabricate computer generated holograms (CGH) and diffractive optical elements (DOE) over a variety of substrates [1]- [3]. Although this is a mature topic, there is still a great interest to develop and apply cost effective fabrication processes, as well as effective tools for the quality evaluation of the fabricated elements [4,5]. In general, two types of studies have been conducted in the field: those intended either to improve the fabrication process or to reduce its cost, and those intended to improve the CGH design.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Low cost production of computer-generated holograms: from design to optical evaluation

Moreno

Martínez-García²,

Nieradko

et al. 2010

J. Eur. Opt. Soc.-Rapid Publ.

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In this work we review some optical characterization methods useful for the low cost production of two phase level computer generated holograms (CGH). As an example, binary CGH are designed with an iterative Fourier transform algorithm (IFTA) and fabricated on a silicon master micromachining with a single step of selective dry etch of silicon dioxide (SiO 2) layer. The CGH characterization is performed in three steps; a first one involves the application of spectroscopic ellipsometry measurements to accurately measure the thickness of the SiO 2 layer. These results permit the evaluation of the relative complex reflectance between the two levels of the developed hologram as a function of the wavelength. In a second step, interference microscopy is applied to directly visualize the phase shift in the SiO 2 /Si binary phase profile. Finally, the performance and diffraction efficiency of the fabricated CGH is compared for various lasers with different wavelengths. These experimental measurements in these two last steps confirm with very good accuracy the results derived from the spectroscopic ellipsometry analysis. In conjunction, the combination of these well established optical techniques provides a precise optical characterization of binary diffractive optical elements produced with simple and low cost technique, useful for mass production.

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“…The design of CGH is a subject that has been studied for more than forty years and a variety of techniques have been developed [3,4]. Here we have considered two fabrication limitations.…”

Section: Fabrication Procedures and Cgh Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low cost production of computer-generated holograms: from design to optical evaluation

Moreno

Martínez-García²,

Nieradko

et al. 2010

J. Eur. Opt. Soc.-Rapid Publ.

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show abstract

“…It can be implemented using such optical elements as the relief kinoforms (phase holographic platelets) [4], holographic optical elements [5], digital holograms recorded on films [6], and dynamic optical elements with the spatial light modulators (SLMs) [7]. The comprehensive review of the methods for the light field formation and their technological implementations is given in [8].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the methods for optical wavefront parameter manipulation

Vovk

Petrov

2017

J. Phys.: Conf. Ser.

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Abstract. Here we describe the efficiency of methods for obtaining optical wavefronts with the predetermined parameters, consider the main techniques of the wave field formation, and conduct the analysis of the applicability of these methods to specific problems. We also developed and analyzed the combination of wavefront formation methods. Among the results is the new method of the light beam synthesis based on the combination of the adaptive wavefront optimization approach and the direct prescription of the phase distribution via scalar diffraction theory.

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“…technologies for generating micro-optical fields, using the SLM have been proposed. [5][6][7][8][9][10] Since the number of resolvable pixels in an SLM is finite, the SLM cannot generate an optical field with higher frequencies than the sampling frequency, which is defined by the number of pixels. This sampling frequency noise obviously appears in the frequency domain because the optical field in the SLM plane propagates into the focal plane of the Fourier transform lens.…”

Section: Introductionmentioning

confidence: 99%

Micro-Optical Fields Generated by a Spatial Light Modulator

Hahn¹,

Lim²,

Kim³

et al. 2009

Jnl of Holography and Speckle

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A method for generating a micro-optical field by means of a spatial light modulator (SLM) is proposed. The optical field generated by SLM contains sampling frequency noise that is produced during diffraction, which is the result of the finite bandwidth of the SLM. Therefore, to generate a good quality micro-optical field, the transfer optics is necessary for demagnifying and imaging the field of the SLM. An SLM with a twisted nematic liquid crystal (TNLC) has advantages in the dynamic generation of optical fields, and the resolution of the fields is as large as the number of pixels in the SLM. In this paper, we describe the properties of an SLM with a commercial TNLC and telecentric optics, which serves to demagnify the optical field generated by the SLM. Telecentric optics demagnifies optical fields as 4f optics, and its distortion errors are negligibly small. These micro-optical fields can be measured by holographic microscopy with the aid of phase-shifting technology. Such analyses with holographic microscopy are highly suitable for measuring both the phase and the amplitude of fields. In this paper, we present three special cases that validate the feasibility and analyze the results numerically by means of holographic measurements.

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Diffractive Optic Synthesis and Analysis of Light Fields and Recent Applications

Cited by 11 publications

References 102 publications

Low cost production of computer-generated holograms: from design to optical evaluation

Low cost production of computer-generated holograms: from design to optical evaluation

Investigation of the methods for optical wavefront parameter manipulation

Micro-Optical Fields Generated by a Spatial Light Modulator

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