Efficient beam splitting with continuous relief DOEs and microlens arrays

Krasnaberski, Aliaksei; Miklyaev, Yuri V.; Pikhulya, Denis G.; Kleinschmidt, Lisa; Imgrunt, Waleri; Ivanenko, Mikhail; Lissotschenko, Vitalij

doi:10.1117/12.908784

Cited by 9 publications

(3 citation statements)

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“…The laser-induced vacuolization caused by LIOB destroys melanin in the epidermal and dermal layers with no or minimal thermal damage and induces collagen regeneration inside the vacuole, resulting in scar-free skin recovery [15,16]. To reduce unwanted thermal injury, micro-lens arrays (MLA) and diffractive optical elements (DOE) are clinically employed with a picosecond laser system [17][18][19]. Typically, MLA has a Gaussian-like micro-beam distribution whereas DOE has a flat-like micro-beam distribution [19].…”

Section: Introductionmentioning

confidence: 99%

“…To reduce unwanted thermal injury, micro-lens arrays (MLA) and diffractive optical elements (DOE) are clinically employed with a picosecond laser system [17][18][19]. Typically, MLA has a Gaussian-like micro-beam distribution whereas DOE has a flat-like micro-beam distribution [19]. Owing to the inherent optical features, either lens is selected by the condition of the melasma.…”

Section: Introductionmentioning

confidence: 99%

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Dependence of laser‐induced optical breakdown on skin type during 1064 nm picosecond laser treatment

Kim

Hwang²,

Choi

et al. 2021

Journal of Biophotonics

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The current study aims to evaluate the dependence of laser-induced optical breakdown (LIOB) on skin types by using 1064 nm picosecond laser with microlens arrays (MLA) and diffractive optical elements (DOE). Both black and white skin tissues were examined to comparatively assess the LIOB effects in the skin in terms of laser-induced vacuolization.The black skin irradiated at 3.0 J/cm 2 demonstrated that MLA yielded a deeper distribution (180-400 μm) of laserinduced vacuoles with a size of 67 μm, compared to DOE (180-280 μm; 40 μm in size). However, the white skin presented that MLA created larger vacuoles (134 μm in size) in a smaller number at deeper distributions (125-700 μm) than MLA with the black skin. DOE generated no laser-induced vacuolization in the white skin. The white skin tissue with inherent higher scattering could be responsible for deeper vacuolization after the picosecond laser treatment. Further investigations are expected to determine the optimal treatment conditions for various skin types. K E Y W O R D Sdiffractive optical elements, fitzpatrick skin type, laser-induced optical breakdown, microlens arrays, picosecond laser skin treatment

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dependence of laser‐induced optical breakdown on skin type during 1064 nm picosecond laser treatment

Kim

Hwang²,

Choi

et al. 2021

Journal of Biophotonics

View full text Add to dashboard Cite

show abstract

“…For example, conventional beamsplitters, diffractive optics, and pupil division have been shown to accomplish amplitude beam-splitting of a laser [3]. Binary phase gratings [4][5][6], continuous phase gratings [6][7][8], and refractive lenslet arrays [9] also accomplish phase beam-splitting. Continuous phase gratings are of interest, since they yield the highest efficiencies out of all beam-splitting methods [10].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis and optimization method for the fabrication of one-dimensional beam-splitting phase gratings

et al. 2015

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A method to design one-dimensional beam-spitting phase gratings with low sensitivity to fabrication errors is described. The method optimizes the phase function of a grating by minimizing the integrated variance of the energy of each output beam over a range of fabrication errors. Numerical results for three 1x9 beam splitting phase gratings are given. Two optimized gratings with low sensitivity to fabrication errors were compared with a grating designed for optimal efficiency. These three gratings were fabricated using gray-scale photolithography. The standard deviation of the 9 outgoing beam energies in the optimized gratings were 2.3 and 3.4 times lower than the optimal efficiency grating.

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Seminal Tools for Roll‐to‐Roll Manufacturing

Schulz-Ruhtenberg

Kolbusch

Fernandes

et al. 2014

Laser Technik Journal

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Organic electronics is promising to be one of the groundbreaking technologies to revolutionize our everyday lives by including new functionalities into nearly any item. Cost is the most significant barrier, since new functionalities should not increase the price of the product dramatically. Roll-to-roll production is the solution to overcome the price barrier. In combination with integrated laser processes new possibilities are opened up for cost-efficient, versatile and high throughput manufacturing lines (Fig. 1).

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Efficient beam splitting with continuous relief DOEs and microlens arrays

Cited by 9 publications

References 0 publications

Dependence of laser‐induced optical breakdown on skin type during 1064 nm picosecond laser treatment

Dependence of laser‐induced optical breakdown on skin type during 1064 nm picosecond laser treatment

Sensitivity analysis and optimization method for the fabrication of one-dimensional beam-splitting phase gratings

Seminal Tools for Roll‐to‐Roll Manufacturing

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