Optical glass and optical design: Otto Schott´s role in the entangled development

Fotheringham, Ulrich; Petzold, Uwe; Ritter, Simone M.; James, William Joseph

doi:10.1364/ome.460691

Cited by 7 publications

(9 citation statements)

References 16 publications

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“…[3,4,13] 도의 측정없이 산출할 수 있으며, [3,14] 이를 고려하여 광 학 설계해야 한다. [13] (4) [2] h represents the distance between the central axis and the axis of the transmitted light into an optical lens, and f indicates focal length. The focal aberration is occurred when h is big.…”

Section: 광학 유리의 광학 특성mentioning

confidence: 99%

“…(b) Chromatic aberration of a convex lens. [2] R 1 and R 2 represent the radius of curvature of each surfaces, and n indicates refractive index of the convex lens. (c) Chromatic aberration correction through a combination of convex and concave lenses.…”

Section: 광학 유리의 광학 특성mentioning

confidence: 99%

“…(c) Chromatic aberration correction through a combination of convex and concave lenses. [2] 편차가 생긴다고 설명하였다. [16] 유리 내부에 줄무늬 형태의 맥리가 존재한다면 균질 성이 감소한다.…”

Section: 광학 유리의 광학 특성unclassified

“…한 장의 렌즈로 구성된 단렌 즈 광학계에서는 분산 특성 때문에 빛의 파장에 따라 초 점 거리가 달라져 이미지가 흐릿한 색수차(chromatic aberration)가 발생한다. 이를 보정하기 위한 굴절력을 계산하기 위해, 다음 식 (3)과 같이 분산의 역수로 정량 화한 아베수가 활용되며, 아베수가 다른 소재를 조합하여 색수차의 보정이 가능하다 [2].…”

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“…3. (a) Schematic diagram of spherical aberration [2]. h represents the distance between the central axis and the axis of the transmitted light into an optical lens, and f indicates focal length.…”

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confidence: 99%

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Core characteristics and technology development status of optical glass materials for camera lenses

Choi¹,

Nam²,

Han³

2022

Ceramist

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For core imaging technologies, various R&D for optical lens design have been carried out to realize highresolution images without distortion. The need for systematic analysis of the optical and physical properties of various materials and the correlation for optical lens design has increased. Therefore, core characteristics of visible optical glass material such as refractive index, dispersion value, transmittance, coefficient of thermal expansion, and striae were reviewed from the viewpoint of improving the performance of optical lenses. In this study, the correlation between the refractive index and dispersion value of the optical glass material and the performance of optical lens module is explained by minimizing the chromatic aberration of various wavelength. In addition, we reviewed the refractive index distribution of global leading group's optical glass, which is the most widely used in optical lens manufacturing, and the current status of optical glass technology development at KOPTI.

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Section: 광학 유리의 광학 특성mentioning

confidence: 99%

Section: 광학 유리의 광학 특성mentioning

confidence: 99%

Section: 광학 유리의 광학 특성unclassified

unclassified

mentioning

confidence: 99%

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Core characteristics and technology development status of optical glass materials for camera lenses

Choi¹,

Nam²,

Han³

2022

Ceramist

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Aberration-corrected lens design in the ultraviolet-visible regime

Shafqat,

Cabrera,

Mahmood

2024

Optical Design and Engineering IX

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The inherent dispersion of the glass utilized in lens construction necessitates applying various techniques to eliminate aberrations. Prior research has traditionally concentrated on single-spectrum applications, targeting either the visible or infrared region. In this study, we designed and conducted numerical simulations of an achromatic lens designed for the UV-visible spectrum, employing unconventional materials such as silicon nitride (Si3N4) and aluminum oxide (Al2O3). The Si3N4 serves as the equivalent of Flint glass, offering a high refractive index and a relatively lower Abbe number. Its transparent window extends from the deep ultraviolet (UV) range and covers the entire visible spectrum. Conversely, Al2O3 is well-suited for use as crown glass, given its lower refractive index than Si3N4 and a higher Abbe number, and Al2O3 remains transparent from the UV region till the mid-infrared region. Combining these two materials should yield an achromatic lens with eliminated chromatic aberrations. Therefore, lens design started with the achromat equations, and further optimizations were done using Opticstudio Zemax, a ray tracing software. The Seidel diagram and focal variation graph offered realistic validation of our study's complete reduction of aberrations, and good focusing efficiency was achieved. The operational wavelengths in our study encompass a range from 360 nm to 633 nm, encompassing both the ultraviolet and visible spectra. Our work may apply to futuristic broadband imaging systems, collimators, and spectrometers.

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Broadband spin and angle co-multiplexed waveguide-based metasurface for six-channel crosstalk-free holographic projection

Liu,

Gao,

et al. 2024

eLight

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Metasurface-based holograms, or metaholograms, offer unique advantages including enhanced imaging quality, expanded field of view, compact system size, and broad operational bandwidth. Multi-channel metaholograms, capable of switching between multiple projected images based on the properties of illuminating light such as state of polarization and angle of incidence, have emerged as a promising solution for realizing switchable and dynamic holographic displays. Yet, existing designs typically grapple with challenges such as limited multiplexing channels and unwanted crosstalk, which severely constrain their practical use. Here, we present a new type of waveguide-based multi-channel metaholograms, which support six independent and fully crosstalk-free holographic display channels, simultaneously multiplexed by the spin and angle of guided incident light within the glass waveguide. We employ a k-space translation strategy that allows each of the six distinct target images to be selectively translated from evanescent-wave region to the center of propagation-wave region and projected into free space without crosstalk, when the metahologram is under illumination of a guided light with specific spin and azimuthal angle. In addition, by tailoring the encoded target images, we implement a three-channel polarization-independent metahologram and a two-channel full-color (RGB) metahologram. Moreover, the number of multiplexing channels can be further increased by expanding the k-space’s central-period region or combing the k-space translation strategy with other multiplexing techniques such as orbital angular momentum multiplexing. Our work provides a novel approach towards realization of high-performance and compact holographic optical elements with substantial information capacity, opening avenues for applications in AR/VR displays, image encryption, and information storage.

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Optical glass and optical design: Otto Schott´s role in the entangled development

Cited by 7 publications

References 16 publications

Core characteristics and technology development status of optical glass materials for camera lenses

Core characteristics and technology development status of optical glass materials for camera lenses

Aberration-corrected lens design in the ultraviolet-visible regime

Broadband spin and angle co-multiplexed waveguide-based metasurface for six-channel crosstalk-free holographic projection

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