Re: New lenses have high chromatic aberation Ugh! ... >> The coating was getting scratched so I ordered new lenses.... What is the index and Abbe...Polycarb has the lowest abbe value ... > Hoya, like other manufacturers, have lenses in many different materials,... (sci.med.vision)
Negative Index Hype ...refracting materials.... be produced by simply blending two granular substances together. ... optics and electromagnetics sector - how to produce near-perfect lenses...negatively-refracting materials which can be cheaply ... (sci.optics)
Re: Polycarbonate versus High Index Plastic (1.67) lens help! ... The frames are a lot smaller, almost a 40% smaller than my old (13 yr ...materials with an Abbe value of at least 36, but in your case, probably because ... The lenses still need to be ... positioned accurately regardless of the lens design.... (sci.med.vision)
Re: three mini-rants ... The lenses would be too expensive. ... That's why they're using mirrors.... either each illuminating its own thermal absorber or several (up to ... thousands) illuminating a thermal absorber. ... (alt.sysadmin.recovery)
Re: Seismic waves, density and temperature. ... By definition, they are not fluids.... There are many materials for which the definitions are blurred. ... And don't get sore at me because Geophysics has a large literature ... Let's see if Stuart can rise above the plimsol line inscibed on his ... (sci.geo.geology)
