Research on multi-layer diffractive optical elements and their application to camera lenses

Nakai, Takehiko; Ogawa, Hideki

doi:10.1364/domo.2002.dma2

Cited by 44 publications

(29 citation statements)

References 5 publications

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“…Recently, DOEs have also been integrated into imaging optical systems, such as photographic lenses, microscope objectives, projection lenses and pickup lenses. 1,2 Most of diffractive optical elements are computer generated, i.e. the pattern of the synthetic or computer generated hologram is firstly designed by some mathematical model which is afterwards realized physically.…”

Section: Introductionmentioning

confidence: 99%

Performance improvement of CGHs for optical testing

et al. 2003

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The expansion of the field of diffractive optics applications is accompanied by toughening performance requirements for CGHs. Optical testing sets especially high requirements, concerning wavefront accuracy and diffraction efficiency. The key point in fabrication technology is the writing system creating the photomask or the profiled pattern. The diffractive optics fabrication facility at ITO (University of Stuttgart) is based on the circular laser writing system CLWS-300. This flexible and high-accurate tool was originally designed for binary diffractive optics fabrication. This paper presents novel enhancements of this system allowing direct laser writing of a wide range of binary and continuous-relief CGHs on photoresist layers, chromium films and LDW-glass. Main topics of the enhancements were the scanning accuracy and exposure control.Many types of CGHs (binary precision holograms for optical testing, Shack-Hartmann arrays, microlens discs for confocal microscopy, diffractive interferometer objectives, doughnut generators etc.) have been manufactured using the developed algorithms and hardware.

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Section: Introductionmentioning

confidence: 99%

Performance improvement of CGHs for optical testing

et al. 2003

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“…Diffractive doublet solutions have been successfully developed in the visible spectral range, and designed into telephoto lenses, providing significant size and weight benefits [18]. The recent advancements in replication of subwavelength patterns onto surfaces of chalcogenide materials [19 -20] provides a foundation for successful development and implementation of broadband diffractive doublet technology for the IR and THz spectral regions.…”

Section: Gaasmentioning

confidence: 99%

Diffractive optics technologies in infrared systems

Soskind

2015

SPIE Proceedings

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The proliferation of diffractive optics technologies into military and consumer markets has been driven by advancements in modeling, fabrication, and performance characterization of diffractive optical elements.Diffractive optics offers additional degrees of freedom for controlling the propagation, dispersion, and polarization of light in photonic instruments. It provides instrumentation developers and optical designers with additional flexibility in systems' architectures, resulting in solutions with reduced overall size and weight, as well as enhanced performance characteristics. The benefits of diffractive optics are becoming especially important in spectral regions where high optical quality materials are sparse or not available. That applies especially to the long-wave infrared and THz spectral regions, where diffractive optical elements perform exceptionally well.This paper presents examples of optical systems employing diffractive optical elements, emphasizing unique benefits enabled by the use of diffractive optics in modern photonic instruments. It also outlines certain areas of further diffractive optics developments that are expected to provide significant system-level performance benefits.

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“…elements combining both refractive and diffractive properties, have been made in the last decades [10][11][12][13]. The need for mastering beamshaping techniques is continuously increasing in industries such as consumer electronics, illumination, biomedical engineering, defense and security [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Design, simulation, and quality evaluation of micro-optical freeform beam shapers at different illumination conditions

Infante-Gómez

Herzig

2016

Appl. Opt.

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A design method to generate thin micro-optical freeform (MOF) beam shapers by clipping or wrapping an original and much thicker freeform surface is provided. MOF elements are situated at the border between refractive and diffractive optical elements. The influence of parameters such as the clipping factor q, the peak-to-valley amplitude of the original surface, the design wavelength and the spectrum of the light source (single wavelength and multiple wavelength lines) into the quality of the output intensity distributions has been studied. Integer q values are mandatory for good quality at monochromatic illumination. On the contrary, the quality obtained by broadband illumination oscillates with q and peaks maximally at around q=3.

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Research on multi-layer diffractive optical elements and their application to camera lenses

Abstract: We developed the multi-layer diffractive optical elements to operate with visible wavelength region. The principle of the multi-layer diffractive optical elements and application to photographic lens system, EF400mm F4 DO IS USM, is reported.

Cited by 44 publications

References 5 publications

Performance improvement of CGHs for optical testing

Performance improvement of CGHs for optical testing

Diffractive optics technologies in infrared systems

Design, simulation, and quality evaluation of micro-optical freeform beam shapers at different illumination conditions

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