Lens technology

D.F. Home, Spectacle Lens Technology, Adam Hilger, Bristol, 1978. 

Development of new lens technology in academic institutions and industry is ongoing, including multifocal lens implants and other vision-correction technologies. 

Above examples produced selfocs with a radial gradient of refractive index. From a practical point of view, it is desirable to be able to create optical lenses with the gradient of refractive index in both at radial and axial directions [12, 60, 72]. These pnblications propose that such lenses can be produced use of an impermeable diffuser mask. This method is interesting in connection with the development of planar lens technology for microelectronic industry [12],... 

So-called soft contact lenses are actually made from a polymer hydrogel with a composition of up to about 50% water (the older hard lenses were a solid piece of plastic). If you are a contact lens wearer, you will know what happens when you leave a soft lens to dry out it shrinks and becomes hard like plastic. Dried up lenses will regain their former shape if soaked in water as the polymer network swells and refills with water. Some of the most current contact lens technologies, such as overnight or continuous wear lenses, are based on silicone hydrogels (polymers with a silicon backbone). 

Also, the Floiy interaction parameter has been obtained for 5 homopolymers of interest, i.e., PDMAEMA, PHEMA, PAA, PDMAA and PVP for packaging, insulation, and biomedical applications such as drug delivery systems or for contact lens technology. For the systems studied in this chapter, it was shown that the Flory-Huggins interaction parameter is... 

Environmental Technologies to Treat Sulfur Pollution (P. Lens, L. Hulshoff Pol, eds.), IWA Publishing, London, 2000... 

Interactions of the Sulfur and Nitrogen Cycles Microbiology and Process Technology (P. M. Chazal, P. N. L. Lens)... 

Lens care products, in Encyclopedia of Pharmaceutical Technology, Vol. 8 (J. Swarbrick and J. C. Boylan, eds.), Marcel Dekker, New York, 1993, pp. 361 102. 

Herrygers, V., H. van Langenhove, and E. Smet (2000), Biological treatment of gases polluted by volatile sulfur compounds. In P.N. L. Lens and L. H. Pol (eds.), Environmental Technologies to Treat Sulfur Pollution — Principles and Engineering, IWA Publishing, pp. 281—304. 

Microoptics Technology Fabrication and Applications of Lens Arrays and Devices, Nicholas Borrelli... 

Baetens, D., Water pinch analysis minimisation of water and wastewater in the process industry, Chapter 11 in Water recycling and resource recovery in industry Analysis, technologies and implementation, Edited by P.Lens et al., IWA publishing, 2002, ISBN 1 84339 005 1. 

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