Glass, Volume 1 |
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Page 128
The sample rod prepared in this way looks like a uniaxial crystal with optical
anisotropy . Using a polarimeter , a positive birefringence was observed , uniform
throughout the sample , with the light traveling perpendicular to the pulling axis ,
but ...
The sample rod prepared in this way looks like a uniaxial crystal with optical
anisotropy . Using a polarimeter , a positive birefringence was observed , uniform
throughout the sample , with the light traveling perpendicular to the pulling axis ,
but ...
Page 131
Sample rods of composition ( by weight ) 70 % SiO2 , 23 % B2O3 , and 7 %
Na2O were stretched over a gas torch and cooled under load , and birefringence
was measured as a function of sample temperature . Because of this method of ...
Sample rods of composition ( by weight ) 70 % SiO2 , 23 % B2O3 , and 7 %
Na2O were stretched over a gas torch and cooled under load , and birefringence
was measured as a function of sample temperature . Because of this method of ...
Page 145
After the sample glasses were stretched at 900°C for 5 min and annealed , they
report that the structural birefringence often reached the order of 20 , 000 nm / cm
. The birefringence change of these samples was measured as a function of heat
...
After the sample glasses were stretched at 900°C for 5 min and annealed , they
report that the structural birefringence often reached the order of 20 , 000 nm / cm
. The birefringence change of these samples was measured as a function of heat
...
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absorption alkali annealing applied assumed atoms band birefringence bleaching bond borate glasses Bray Brillouin calculations caused Ceram charge Chem coefficient color composition concentration conductivity considered constant containing coordination copper crystal crystalline curve darkening density dependence described detailed determined dielectric diffusion discussed distribution effect electron energy equation equilibrium et al experimental fading field fluctuations frequency function given gives heat treatment hole increased indicated intensity ions levels light liquid material measured mole negative observed obtained optical oxide oxygen particles phase photochromic Phys polarization positive present probably produce properties range ratio reduced relaxation reported respectively sample scattering separation shift shown in Fig silicate glasses silver halide similar SiO2 sodium Solids spectra spectrum strain stretching structural studied Taylor techniques temperature term thermal tion transition trapped units unpublished wavelengths York