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In this paper, we fabricate ball lenses using the sagging method which diameters are from 0.3mm to 3.0mm. The basic performances such as the spectral transmittance, the effective focal length, the back focal length, the numerical aperture are analyzed in theory and experiment.
A method to fabricate the porous glass ceramic microspheres is reported. The fabricated glass microspheres and the porous glass ceramic microspheres are characterized by scanning electroscopy (SEM) and transmission electron microscopy (TEM), respectively. The sizes of glass microspheres and the pore diameters of the porous glass ceramic microspheres are estimated, respectively. The adsorption properties...
In this paper, the finite schematic eye model with Maxwell fish-eye spherical lens is proposed. Spherical aberration, sagittal and tangential power errors, astigmatism, field curvature and internal and external angles of the pupil ray are compared with four existing model eyes and real eye. The finite schematic eye model with Maxwell fish-eye spherical lens provides excellent estimation of spherical...
Gradient refractive index(GRIN) ball lenses are novel optical devices and can be used to couple light between laser diode and optical fiber. Moreover, as they can be very small as less than 3mm, they may help to improve optical device compactness. This paper compares the performances of ball lenses having gradient refractive index distribution and homogeneous medium. It appears that the performances...
A method to fabricated Eu3+-immersed in porous glass microspheres is reported. The fabricated glass microspheres and the porous glass microspheres are characterized by scanning electroscopy (SEM) and transmission electron microscopy (TEM), and the sizes of glass microspheres and the sizes of aperture of the porous glass microspheres are estimated, respectively. The photoluminescence spectroscopy of...
In this paper, the silica microspheres having europium ions are fabricated using the powders floating method. The optical characterizations of the silica microspheres having europium ions are performed in the attenuated-total-reflection configuration under excitation of 395 nm laser. When the diameters of the silica microspheres having europium ions are 60 mum and 90 mum, the estimated quality factors...
Glass microspheres are fabricated using the powders floating method and characterized by differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning election microscope (SEM). Research results indicate that the optimal annealing temperature of glass microspheres is 590degC, glass microspheres have better surface qualities and can be used in many field.
In this paper, the oxide compositions model (OC model) is established for discussing the chromatic aberrations of gradient refractive index rod lens. The chromatic aberration for Na+/Li+ ion exchanges is discussed based on the OC model and the Huggins–Sun–Davis (HSD) model. Theoretical result indicates that the function value mainly depends on base glass properties and nature of exchanging ion pairs,...
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