Results 161 to 170 of about 5,698 (213)
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Journal of Microscopy, 1983
SUMMARYImmersion refractometry is based on matching the refractive index of the medium to that of the cytoplasm of the cell, in which case the latter will have minimum contrast in the phase contrast microscope and will practically disappear. The cytoplasm is then said to be at the match point with the medium. Since the refractive index of a solution is
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SUMMARYImmersion refractometry is based on matching the refractive index of the medium to that of the cytoplasm of the cell, in which case the latter will have minimum contrast in the phase contrast microscope and will practically disappear. The cytoplasm is then said to be at the match point with the medium. Since the refractive index of a solution is
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Refractometry by reflectometry
SPIE Proceedings, 1995Complex refractive index determination (refractometry) of metals can be made successfully with methods using reflectivity measurements. In this paper a brief classification of reflectivity methods with subsequent comments about their sensitivity is made. Experimental results obtained using the most suitable methods are presented.
Dan Apostol +5 more
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Synthetic aperture rainbow refractometry
Optics Letters, 2022This work proposed a synthetic aperture rainbow refractometry (SARR) by synthesizing rainbow signals of the same droplet with dual-wavelength laser beams, in order to increase the aperture of rainbow refractometry. In this way, the SARR can apply to long distance and small droplets measurement. An achromatic imaging system, which simultaneously records
Xinhao, Wang +5 more
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Archives of Ophthalmology, 1970
Three methods for simplifying the solution of the equations used in meridional refractometry are outlined: solution by time-sharing, multiple-access digital computers; solution by special-purpose analogue computer; and solution by nomogram. The advantages and the disadvantages of each method are discussed.
R F, Brubaker +2 more
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Three methods for simplifying the solution of the equations used in meridional refractometry are outlined: solution by time-sharing, multiple-access digital computers; solution by special-purpose analogue computer; and solution by nomogram. The advantages and the disadvantages of each method are discussed.
R F, Brubaker +2 more
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Archives of Ophthalmology, 1969
Meridional refractometry is a process whereby the meridional power of the corrective lens is measured in three predetermined meridians of the eye and the final prescription calculated from these data. The calculation is based on equations derived from Laurance's approximation of the meridional power of a cylindrical lens.
R F, Brubaker +2 more
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Meridional refractometry is a process whereby the meridional power of the corrective lens is measured in three predetermined meridians of the eye and the final prescription calculated from these data. The calculation is based on equations derived from Laurance's approximation of the meridional power of a cylindrical lens.
R F, Brubaker +2 more
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Proceedings. Annual meeting - American Society of Brewing Chemists, 1965
(1965). Principles of Refractometry. Proceedings. Annual meeting - American Society of Brewing Chemists: Vol. 23, Proceedings of the Annual Meeting 1965, pp. 176-186.
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(1965). Principles of Refractometry. Proceedings. Annual meeting - American Society of Brewing Chemists: Vol. 23, Proceedings of the Annual Meeting 1965, pp. 176-186.
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Instant photographic refractometry in children
Acta Ophthalmologica, 1988Abstract. A simple photographic method for detection and measurement of refractive errors in children, using a specially designed camera and electronic flash unit and ‘instant’ (Polaroid) film, was tested on 64 children, aged 3 to 8 years, and compared with the results from retinoscopy. The refractive errors ranged from ‐6.5 to +6.5 D.
P, Wanger, G, Waern
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1994
When a ray of electromagnetic radiation strikes a flat surface at an angle, the ray may be bent upward (reflected) or bend downward (refracted) as illustrated in Fig. 27.1. Notice that the ray does not go straight through the material.
Yeshajahu Pomeranz, Clifton E. Meloan
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When a ray of electromagnetic radiation strikes a flat surface at an angle, the ray may be bent upward (reflected) or bend downward (refracted) as illustrated in Fig. 27.1. Notice that the ray does not go straight through the material.
Yeshajahu Pomeranz, Clifton E. Meloan
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Interferometry and refractometry of snail amoebocytes
Experimental Cell Research, 1959Abstract Quantitative cytological data have been obtained for different regions of living snail amoebocytes in tissue culture using cell refractometry and interferometry. The modal solid concentration in the cytoplasm was found to be 13.5 ± 0.5 g per 100 ml as measured by immersion refractometry.
R, BARER, D A, DICK
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