Apparatus for manufacturing aspherically shaped small lenses

Details Apparatus for manufacturing aspherically shaped small lenses Apparatus for manufacturing aspherically shaped small lenses

1989-10-04

1991-08-20

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Means making particulate material directly from liquid or...

264 11, 264 5, 425808, 425174, B29C 4136

Patent

active

050409611

ABSTRACT:
Apparatus for the manufacture of individual small lenses, which may have gradient indices of refraction. The apparatus includes a pedestal having a conduit therein and an end surface the perimeter of which may be circular or elliptical. The perimeter is defined by a sharp edge. The pedestal is supported with the end surface horizontal and facing downwards. The intersection of the conduit and the surface, also defined by a sharp edge, forms an orifice through which at least one of the liquid monomers for forming the lens is fed. Gradient index small lenses are formed by suspending a first monomer from the horizontal end surface of the pedestal and then, via the orifice, introducing the second monomer at a rate which equals the rate of inter-diffusion of the second monomer into the first monomer. Alternatively, both monomers are both fed, in mixed condition, through the orifice in continuously varying proportions. The monomer(s) are cured in the pendant condition. The gradient index small lenses so formed are aspherical and, in the case of an elliptical pedestal end surface, also anamorphic.

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