Results 251 to 260 of about 588,576 (300)
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SPIE Proceedings, 1989
In tnis paper a new type of optical imaging system--Optical Compound Eye Lens is described.According in apposition cyc pattern of the insect compound eye, the general design formula of Optical compound Eye Lens are given. There are short focus, a large field of view and a mosaic structure of optical elements and detectors in this new type or optical ...
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In tnis paper a new type of optical imaging system--Optical Compound Eye Lens is described.According in apposition cyc pattern of the insect compound eye, the general design formula of Optical compound Eye Lens are given. There are short focus, a large field of view and a mosaic structure of optical elements and detectors in this new type or optical ...
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Medical & Biological Engineering & Computing, 1997
The complex electrical impedance of a goat eye lens is studied in the frequency range 10 mHz-10 Hz at room temperature, using a computer-controlled AC impedance system. AC impedance software (model 368, version 2.2) is employed to determine the total impedance and capacitance of the eye lens at various frequencies.
K S, Kohli +4 more
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The complex electrical impedance of a goat eye lens is studied in the frequency range 10 mHz-10 Hz at room temperature, using a computer-controlled AC impedance system. AC impedance software (model 368, version 2.2) is employed to determine the total impedance and capacitance of the eye lens at various frequencies.
K S, Kohli +4 more
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Acta Ophthalmologica, 2011
AbstractPurpose To prevent the induction of cataracts by ionizing radiation (photons or betas), the International Commission on Radiological Protection (ICRP) has lowered the annual dose limit for the eye lens from 150 mSv down to 20 mSv for occupational exposures.
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AbstractPurpose To prevent the induction of cataracts by ionizing radiation (photons or betas), the International Commission on Radiological Protection (ICRP) has lowered the annual dose limit for the eye lens from 150 mSv down to 20 mSv for occupational exposures.
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Eye Lens Protection for Radiological Personnel
Radiology, 1977Various radiodiagnostic procedures expose the eye lens of the diagnostic technician to radiations. With the aid of lead glasses with an attenuation of radiation equivalent to 0.25 mm of lead, the dose can be reduced by 90%.
K, Bergström, H, Jorulf, P O, Löfroth
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Accuracy of fish-eye lens models
Applied Optics, 2010The majority of computer vision applications assumes that the camera adheres to the pinhole camera model. However, most optical systems will introduce undesirable effects. By far, the most evident of these effects is radial lensing, which is particularly noticeable in fish-eye camera systems, where the effect is relatively extreme. Several authors have
Hughes, Ciarán +3 more
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EDEL: ENEA DOSEMETER FOR EYE LENS
Radiation Protection Dosimetry, 2015Since the publication of International Commission on Radiological Protection statement in 2011 on tissue reaction, eye lens radiation protection played an important role in exposed personnel dosimetry. For this reason, the Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA) Individual Monitoring Service ...
Paolo, Ferrari +2 more
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Tensile strength of lens capsules in eye-bank eyes
Journal of Cataract and Refractive Surgery, 1998To measure the tensile strength of the anterior and posterior lens capsules in eye-bank eyes and study the tensile strength of capsules dehydrated with hypertonic glucose solution.Tongren Hospital, Beijing, China.The in situ anterior and posterior capsules of 35 eye-bank eyes (Group 1) donated by healthy men aged 20 to 40 years (mean 27.1 years) were ...
X, Yang +5 more
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Eye Lens Color: Formation and Function
Science, 1971Aromatic amino acids are photooxidized by near-ultraviolet light to colored products that are bound very tightly to protein amino groups. The resulting colored proteins absorb near-ultraviolet light more strongly and are rendered more hydrophobic than the untreated compounds, and they fluoresce at 440 nanometers when excited at 360 nanometers ...
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Eye and Contact Lens Movement Measurement
Optometry and Vision Science, 1982An accurate and relatively simple method of measuring eye and contact lens movement has been developed. A hidden ultra-high-speed motion picture camera, a digital film data analyzer, and computer data reduction are used to define and separate eye, head, and contact lens movements.
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Eye-Lens proteins structure, superstructure, stability, genetics
Naturwissenschaften, 1994The eye lens in vertebrates and invertebrates is an avascular tissue which allows one to focus objects on the retina. The lens grows throughout life, maintaining transparency without significant turnover of its densely packed proteins. Apart from cytoskeletal and taxon-specific components, these proteins belong mainly to the alpha- and beta gamma ...
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