Results 211 to 220 of about 251,306 (248)
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2023
Optical devices in laparoscopic surgery comprised a telescope (0-30-45 degree telescopes), a light source, a light cable, a camera, and a monitor. All play an essential role from the beginning to the end of the procedure. The outcome of a suitable laparoscopic procedure depends on optical devices. The telescope used may have 0-3-45 degree view.
Venkatesh Rewale +2 more
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Optical devices in laparoscopic surgery comprised a telescope (0-30-45 degree telescopes), a light source, a light cable, a camera, and a monitor. All play an essential role from the beginning to the end of the procedure. The outcome of a suitable laparoscopic procedure depends on optical devices. The telescope used may have 0-3-45 degree view.
Venkatesh Rewale +2 more
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Optic Canal Positioning Device
Radiology, 1970Abstract The optic canal must De piacea at a right angle to the film for accurate roentgenography. The necessary angle is difficult to achieve without the aid of a positioning device. The authors describe an instrument developed for this purpose and explain the procedure involved in its use.
G D, Potter, S L, Trokel
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Optically controlled microwave devices
International Topical Meeting on Microwave Photonics. MWP '96 Technical Digest. Satellite Workshop (Cat. No.96TH8153), 2002In this paper, a review is given of recent advances in optically controlled microwave and millimeter wave devices and circuits. Special emphasis will firstly be laid on the physical background of optical effects in semiconductor materials and structures.
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Disorientated optical polarization devices
Optics Letters, 2011By using a pure operatorial (nonmatrix) approach to some of the variable composite polarization devices, we show that for some values of the variable internal parameters, these devices lose their anisotropy. Their principal axes, or more generally their eigenvectors, become undetermined, i.e., in this sense, the anisotropic devices get "disorientated."
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Science, 1986
Optical fiber is rapidly becoming the transmission medium of choice for new telecommunication systems. For a true lightwave network to evolve, however, optical control devices such as optical switches and multiplexer-demultiplexers will be essential.
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Optical fiber is rapidly becoming the transmission medium of choice for new telecommunication systems. For a true lightwave network to evolve, however, optical control devices such as optical switches and multiplexer-demultiplexers will be essential.
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Journal of Nonlinear Optical Physics & Materials, 1994
Theoretical and experimental results are described of several nonlinear optical structures and devices investigated by our group, that may potentially be usable for certain applications. Three groups of devices are addressed: a multiple quantum well switching device, a bistable semiconductor periodic multilayered structure and an optical harmonic ...
Cada, M. +4 more
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Theoretical and experimental results are described of several nonlinear optical structures and devices investigated by our group, that may potentially be usable for certain applications. Three groups of devices are addressed: a multiple quantum well switching device, a bistable semiconductor periodic multilayered structure and an optical harmonic ...
Cada, M. +4 more
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2012
A device comprising an imaging optical unit (9) for imaging an object field (5) in an image field (10), a structured mask (7), which is arranged in the region of the object field (5) by means of a reticle holder (8) that can be displaced in a reticle scanning direction (21), and a sensor apparatus (25), which is arranged in the region of the image ...
ZEISS CARL SMT GMBH +2 more
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A device comprising an imaging optical unit (9) for imaging an object field (5) in an image field (10), a structured mask (7), which is arranged in the region of the object field (5) by means of a reticle holder (8) that can be displaced in a reticle scanning direction (21), and a sensor apparatus (25), which is arranged in the region of the image ...
ZEISS CARL SMT GMBH +2 more
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1973 IEEE G-MTT International Microwave Symposium, 1973
The current state of the art in integrated optical devices based on optical guided waves in thin films will be reviewed. The sources, the couplers, the passive elements and the modulators, which are basic components for integrated optics will be discussed.
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The current state of the art in integrated optical devices based on optical guided waves in thin films will be reviewed. The sources, the couplers, the passive elements and the modulators, which are basic components for integrated optics will be discussed.
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1993
Free-space digital optics relies on optical devices which may be required to play the same role as a transistor in digital electronics. In addition to being an optical port, i.e., a modulator or emitter and a detector, they may also be required to act as a thresholding device. Such devices are called optically bistable (OB).
H. Scott Hinton +5 more
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Free-space digital optics relies on optical devices which may be required to play the same role as a transistor in digital electronics. In addition to being an optical port, i.e., a modulator or emitter and a detector, they may also be required to act as a thresholding device. Such devices are called optically bistable (OB).
H. Scott Hinton +5 more
openaire +1 more source