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Formation of micro-optical structures by self-writing processes in photosensitive polymers.

Applied optics

Streppel U, Dannberg P, Wächter C, Bräuer A, Kowarschik R.
PMID: 12833963
Appl Opt. 2003 Jun 20;42(18):3570-9. doi: 10.1364/ao.42.003570.

A local exposure of UV-sensitive polymers leads to a local curing. This corresponds to a saturable and irreversible nonlinear change of the refractive index, which evidently leads to a filamentation of the hardening polymer. This paper investigates the physical...

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Streppel U, Dannberg P, Wächter C, et al. Formation of micro-optical structures by self-writing processes in photosensitive polymers. Appl Opt. 2003;42(18):3570-9doi: 10.1364/ao.42.003570.
Streppel, U., Dannberg, P., Wächter, C., Bräuer, A., & Kowarschik, R. (2003). Formation of micro-optical structures by self-writing processes in photosensitive polymers. Applied optics, 42(18), 3570-9. https://doi.org/10.1364/ao.42.003570
Streppel, Ulrich, et al. "Formation of micro-optical structures by self-writing processes in photosensitive polymers." Applied optics vol. 42,18 (2003): 3570-9. doi: https://doi.org/10.1364/ao.42.003570
Streppel U, Dannberg P, Wächter C, Bräuer A, Kowarschik R. Formation of micro-optical structures by self-writing processes in photosensitive polymers. Appl Opt. 2003 Jun 20;42(18):3570-9. doi: 10.1364/ao.42.003570. PMID: 12833963.
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[Therapeutic electrostimulation].

Munchener medizinische Wochenschrift (1950)

KOWARSCHIK J.
PMID: 14796596
Munch Med Wochenschr. 1950 Oct 27;92(29):1218-24.

No abstract available.

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KOWARSCHIK J. Uber Reizstrombehandlung. [Therapeutic electrostimulation]. Munch Med Wochenschr. 1950;92(29):1218-24
KOWARSCHIK, J. (1950). Uber Reizstrombehandlung. [Therapeutic electrostimulation]. Munchener medizinische Wochenschrift (1950), 92(29), 1218-24.
KOWARSCHIK, J. "Uber Reizstrombehandlung." [Therapeutic electrostimulation]. Munchener medizinische Wochenschrift (1950) vol. 92,29 (1950): 1218-24.
KOWARSCHIK J. Uber Reizstrombehandlung. [Therapeutic electrostimulation]. Munch Med Wochenschr. 1950 Oct 27;92(29):1218-24. Undetermined. PMID: 14796596.
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[Leg pains; notes for practicing physicians].

Wiener medizinische Wochenschrift (1946)

KOWARSCHIK J.
PMID: 13103048
Wien Med Wochenschr. 1953 Sep 05;103(35):633-5.

No abstract available.

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KOWARSCHIK J. Beinschmerzen; ein merkblatt für praktische Arzte. [Leg pains; notes for practicing physicians]. Wien Med Wochenschr. 1953;103(35):633-5
KOWARSCHIK, J. (1953). Beinschmerzen; ein merkblatt für praktische Arzte. [Leg pains; notes for practicing physicians]. Wiener medizinische Wochenschrift (1946), 103(35), 633-5.
KOWARSCHIK, J. "Beinschmerzen; ein merkblatt für praktische Arzte." [Leg pains; notes for practicing physicians]. Wiener medizinische Wochenschrift (1946) vol. 103,35 (1953): 633-5.
KOWARSCHIK J. Beinschmerzen; ein merkblatt für praktische Arzte. [Leg pains; notes for practicing physicians]. Wien Med Wochenschr. 1953 Sep 05;103(35):633-5. Undetermined. PMID: 13103048.
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Self-focusing without external electric field in BaTiO(3).

Optics express

Rausch A, Kiessling A, Kowarschik R.
PMID: 19516793
Opt Express. 2006 Jun 26;14(13):6207-12. doi: 10.1364/oe.14.006207.

We report on the first observation, to our knowledge, of self-focusing without an external electric field in barium titanate crystals under cw laser beam irradiance. This effect we observed at an intensity of 0.2W/cm(2) on the 633nm wavelength regime...

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Rausch A, Kiessling A, Kowarschik R. Self-focusing without external electric field in BaTiO(3). Opt Express. 2006;14(13):6207-12doi: 10.1364/oe.14.006207.
Rausch, A., Kiessling, A., & Kowarschik, R. (2006). Self-focusing without external electric field in BaTiO(3). Optics express, 14(13), 6207-12. https://doi.org/10.1364/oe.14.006207
Rausch, Anne, et al. "Self-focusing without external electric field in BaTiO(3)." Optics express vol. 14,13 (2006): 6207-12. doi: https://doi.org/10.1364/oe.14.006207
Rausch A, Kiessling A, Kowarschik R. Self-focusing without external electric field in BaTiO(3). Opt Express. 2006 Jun 26;14(13):6207-12. doi: 10.1364/oe.14.006207. PMID: 19516793.
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Resolution enhancement in a reflection-type confocal microscope with a phase-conjugate mirror.

Applied optics

Uhlendorf K, Notni G, Kowarschik R.
PMID: 18305687
Appl Opt. 1999 Feb 10;38(5):869-73. doi: 10.1364/ao.38.000869.

Theoretical and experimental results for a new reflection-type confocal microscope with a phase-conjugate mirror (PCM) are presented. The microscope achieves better lateral and axial resolution than the conventional confocal microscope. The observation volume is reduced considerably (approximately 63%). Owing...

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Uhlendorf K, Notni G, Kowarschik R. Resolution enhancement in a reflection-type confocal microscope with a phase-conjugate mirror. Appl Opt. 1999;38(5):869-73doi: 10.1364/ao.38.000869.
Uhlendorf, K., Notni, G., & Kowarschik, R. (1999). Resolution enhancement in a reflection-type confocal microscope with a phase-conjugate mirror. Applied optics, 38(5), 869-73. https://doi.org/10.1364/ao.38.000869
Uhlendorf, K, et al. "Resolution enhancement in a reflection-type confocal microscope with a phase-conjugate mirror." Applied optics vol. 38,5 (1999): 869-73. doi: https://doi.org/10.1364/ao.38.000869
Uhlendorf K, Notni G, Kowarschik R. Resolution enhancement in a reflection-type confocal microscope with a phase-conjugate mirror. Appl Opt. 1999 Feb 10;38(5):869-73. doi: 10.1364/ao.38.000869. PMID: 18305687.
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Modified polymethylmethacrylate as a base for thermostable optical recording media.

Optics express

Krul LP, Matusevich V, Hoff D, Kowarschik R, Matusevich YI, Butovskaya GV, Murashko EA.
PMID: 19547188
Opt Express. 2007 Jul 09;15(14):8543-9. doi: 10.1364/oe.15.008543.

A possibility to improve the thermal properties of holographic gratings in a photosensitive system based on polymethylmethacrylate (PMMA) and to enhance simultaneously the adhesion of the photopolymer to soda-lime glass is demonstrated. The modified PMMA was prepared by radical...

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Krul LP, Matusevich V, Hoff D, et al. Modified polymethylmethacrylate as a base for thermostable optical recording media. Opt Express. 2007;15(14):8543-9doi: 10.1364/oe.15.008543.
Krul, L. P., Matusevich, V., Hoff, D., Kowarschik, R., Matusevich, Y. I., Butovskaya, G. V., & Murashko, E. A. (2007). Modified polymethylmethacrylate as a base for thermostable optical recording media. Optics express, 15(14), 8543-9. https://doi.org/10.1364/oe.15.008543
Krul, L P, et al. "Modified polymethylmethacrylate as a base for thermostable optical recording media." Optics express vol. 15,14 (2007): 8543-9. doi: https://doi.org/10.1364/oe.15.008543
Krul LP, Matusevich V, Hoff D, Kowarschik R, Matusevich YI, Butovskaya GV, Murashko EA. Modified polymethylmethacrylate as a base for thermostable optical recording media. Opt Express. 2007 Jul 09;15(14):8543-9. doi: 10.1364/oe.15.008543. PMID: 19547188.
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Measurement of three-dimensional deformation vectors with digital holography and stereophotogrammetry.

Optics letters

Schwede R, Babovsky H, Kiessling A, Kowarschik R.
PMID: 22660081
Opt Lett. 2012 Jun 01;37(11):1943-5. doi: 10.1364/OL.37.001943.

We present a method to determine the three-dimensional (3D) deformation vectors of an arbitrary stressed object by combining stereophotogrammetry and digital holography in a setup with four cameras. The resulting data consists of a dense 3D point cloud, where...

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Schwede R, Babovsky H, Kiessling A, et al. Measurement of three-dimensional deformation vectors with digital holography and stereophotogrammetry. Opt Lett. 2012;37(11):1943-5doi: 10.1364/OL.37.001943.
Schwede, R., Babovsky, H., Kiessling, A., & Kowarschik, R. (2012). Measurement of three-dimensional deformation vectors with digital holography and stereophotogrammetry. Optics letters, 37(11), 1943-5. https://doi.org/10.1364/OL.37.001943
Schwede, Robert, et al. "Measurement of three-dimensional deformation vectors with digital holography and stereophotogrammetry." Optics letters vol. 37,11 (2012): 1943-5. doi: https://doi.org/10.1364/OL.37.001943
Schwede R, Babovsky H, Kiessling A, Kowarschik R. Measurement of three-dimensional deformation vectors with digital holography and stereophotogrammetry. Opt Lett. 2012 Jun 01;37(11):1943-5. doi: 10.1364/OL.37.001943. PMID: 22660081.
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Partially coherent light-emitting diode illumination for video-rate in-line holographic microscopy.

Applied optics

Petruck P, Riesenberg R, Kowarschik R.
PMID: 22614408
Appl Opt. 2012 May 01;51(13):2333-40. doi: 10.1364/AO.51.002333.

The light of a light-emitting diode or a common thermal source, such as a tungsten filament lamp, is known to be quasi-incoherent. We generated partially coherent light of these sources with a volume of coherence in the micrometer range...

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Petruck P, Riesenberg R, Kowarschik R. Partially coherent light-emitting diode illumination for video-rate in-line holographic microscopy. Appl Opt. 2012;51(13):2333-40doi: 10.1364/AO.51.002333.
Petruck, P., Riesenberg, R., & Kowarschik, R. (2012). Partially coherent light-emitting diode illumination for video-rate in-line holographic microscopy. Applied optics, 51(13), 2333-40. https://doi.org/10.1364/AO.51.002333
Petruck, Paul, et al. "Partially coherent light-emitting diode illumination for video-rate in-line holographic microscopy." Applied optics vol. 51,13 (2012): 2333-40. doi: https://doi.org/10.1364/AO.51.002333
Petruck P, Riesenberg R, Kowarschik R. Partially coherent light-emitting diode illumination for video-rate in-line holographic microscopy. Appl Opt. 2012 May 01;51(13):2333-40. doi: 10.1364/AO.51.002333. PMID: 22614408.
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4D Flat Panel Conebeam CTA for Analysis of the Angioarchitecture of Cerebral AVMs with a Novel Software Prototype.

AJNR. American journal of neuroradiology

Keil F, Bergkemper A, Birkhold A, Kowarschik M, Tritt S, Berkefeld J.
PMID: 35027345
AJNR Am J Neuroradiol. 2022 Jan;43(1):102-109. doi: 10.3174/ajnr.A7382.

BACKGROUND AND PURPOSE: Time-resolved 3DRA (4D-DSA) and flat panel conebeam CTA are new methods for visualizing the microangioarchitecture of cerebral AVMs. We applied a 4D software prototype to a series of cases of AVMs to assess the utility of...

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Keil F, Bergkemper A, Birkhold A, et al. 4D Flat Panel Conebeam CTA for Analysis of the Angioarchitecture of Cerebral AVMs with a Novel Software Prototype. AJNR Am J Neuroradiol. 2022;43(1):102-109doi: 10.3174/ajnr.A7382.
Keil, F., Bergkemper, A., Birkhold, A., Kowarschik, M., Tritt, S., & Berkefeld, J. (2022). 4D Flat Panel Conebeam CTA for Analysis of the Angioarchitecture of Cerebral AVMs with a Novel Software Prototype. AJNR. American journal of neuroradiology, 43(1), 102-109. https://doi.org/10.3174/ajnr.A7382
Keil, F, et al. "4D Flat Panel Conebeam CTA for Analysis of the Angioarchitecture of Cerebral AVMs with a Novel Software Prototype." AJNR. American journal of neuroradiology vol. 43,1 (2022): 102-109. doi: https://doi.org/10.3174/ajnr.A7382
Keil F, Bergkemper A, Birkhold A, Kowarschik M, Tritt S, Berkefeld J. 4D Flat Panel Conebeam CTA for Analysis of the Angioarchitecture of Cerebral AVMs with a Novel Software Prototype. AJNR Am J Neuroradiol. 2022 Jan;43(1):102-109. doi: 10.3174/ajnr.A7382. PMID: 35027345; PMCID: PMC8757557.
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Compressional-Wave Effects in the Operation of a Quartz Crystal Microbalance in Liquids:Dependence on Overtone Order.

Sensors (Basel, Switzerland)

Kowarsch R, Suhak Y, Eduarte LC, Mansour M, Meyer F, Peschel A, Fritze H, Rembe C, Johannsmann D.
PMID: 32365649
Sensors (Basel). 2020 Apr 29;20(9). doi: 10.3390/s20092535.

The operation of the quartz crystal microbalance (QCM) in liquids is plagued by small flexural admixtures to the thickness-shear deformation. The resonator surface moves not only in the transverse direction, but also along the surface normal, thereby emitting compressional...

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Kowarsch R, Suhak Y, Eduarte LC, et al. Compressional-Wave Effects in the Operation of a Quartz Crystal Microbalance in Liquids:Dependence on Overtone Order. Sensors (Basel). 2020;20(9)doi: 10.3390/s20092535.
Kowarsch, R., Suhak, Y., Eduarte, L. C., Mansour, M., Meyer, F., Peschel, A., Fritze, H., Rembe, C., & Johannsmann, D. (2020). Compressional-Wave Effects in the Operation of a Quartz Crystal Microbalance in Liquids:Dependence on Overtone Order. Sensors (Basel, Switzerland), 20(9), . https://doi.org/10.3390/s20092535
Kowarsch, Robert, et al. "Compressional-Wave Effects in the Operation of a Quartz Crystal Microbalance in Liquids:Dependence on Overtone Order." Sensors (Basel, Switzerland) vol. 20,9 (2020). doi: https://doi.org/10.3390/s20092535
Kowarsch R, Suhak Y, Eduarte LC, Mansour M, Meyer F, Peschel A, Fritze H, Rembe C, Johannsmann D. Compressional-Wave Effects in the Operation of a Quartz Crystal Microbalance in Liquids:Dependence on Overtone Order. Sensors (Basel). 2020 Apr 29;20(9). doi: 10.3390/s20092535. PMID: 32365649; PMCID: PMC7249204.
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Subjective speckle suppression for 3D measurement using one-dimensional numerical filtering.

Applied optics

Stark AW, Wong E, Babovsky H, Kowarschik R.
PMID: 31873543
Appl Opt. 2019 Dec 01;58(34):9473-9483. doi: 10.1364/AO.58.009473.

Laser speckle projection is a reliable method to generate statistical illumination patterns for 3D reconstruction purposes as in stereo photogrammetry. This type of pattern has several advantages compared to incoherent methods. However, the biggest disadvantage is given by the...

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Stark AW, Wong E, Babovsky H, et al. Subjective speckle suppression for 3D measurement using one-dimensional numerical filtering. Appl Opt. 2019;58(34):9473-9483doi: 10.1364/AO.58.009473.
Stark, A. W., Wong, E., Babovsky, H., & Kowarschik, R. (2019). Subjective speckle suppression for 3D measurement using one-dimensional numerical filtering. Applied optics, 58(34), 9473-9483. https://doi.org/10.1364/AO.58.009473
Stark, A W, et al. "Subjective speckle suppression for 3D measurement using one-dimensional numerical filtering." Applied optics vol. 58,34 (2019): 9473-9483. doi: https://doi.org/10.1364/AO.58.009473
Stark AW, Wong E, Babovsky H, Kowarschik R. Subjective speckle suppression for 3D measurement using one-dimensional numerical filtering. Appl Opt. 2019 Dec 01;58(34):9473-9483. doi: 10.1364/AO.58.009473. PMID: 31873543.
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Image aberrations in optical three-dimensional measurement systems with fringe projection.

Applied optics

Brakhage P, Notni G, Kowarschik R.
PMID: 15181799
Appl Opt. 2004 Jun 01;43(16):3217-23. doi: 10.1364/ao.43.003217.

In optical shape measurement systems, systematic errors appear as a result of imaging aberrations of the lens assemblies in the cameras and projectors. A mathematical description of this effect is intended to correct the whole measurement area with a...

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Brakhage P, Notni G, Kowarschik R. Image aberrations in optical three-dimensional measurement systems with fringe projection. Appl Opt. 2004;43(16):3217-23doi: 10.1364/ao.43.003217.
Brakhage, P., Notni, G., & Kowarschik, R. (2004). Image aberrations in optical three-dimensional measurement systems with fringe projection. Applied optics, 43(16), 3217-23. https://doi.org/10.1364/ao.43.003217
Brakhage, Peter, et al. "Image aberrations in optical three-dimensional measurement systems with fringe projection." Applied optics vol. 43,16 (2004): 3217-23. doi: https://doi.org/10.1364/ao.43.003217
Brakhage P, Notni G, Kowarschik R. Image aberrations in optical three-dimensional measurement systems with fringe projection. Appl Opt. 2004 Jun 01;43(16):3217-23. doi: 10.1364/ao.43.003217. PMID: 15181799.
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Showing 1 to 12 of 43 entries