Soft Optical Lens and Lens Filters

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The present technology provides a process for fabrication of spherical and aspherical soft optical lenses of varying sizes i.e. micro, milli and sub centimeter sizes and also of desirable curvature. The process involves curing of small volume of a polymeric liquid on a smooth substrate. The radius of curvature of the lens may be varied by varying the volume of liquid The method also provides for the fabrication of optical lenses transparent to a few wavelengths but opaque to certain other wavelengths and thus, can be used as filters.




The process provides for fabrication of optical lens with the following features:

•  Radius of curvature of the lens remains constant in the meridian direction but may vary resulting in an aspherical profile

•  Lens remains symmetric in the azimuthal direction

•  Numerical aperture of the lens may range from 0.22 to 0.45

•  Magnification may vary from 185x to 600x

•  Contrast may vary from 0.38±0.05

•  Surface of the lens may be modified for anti-reflective applications.


Value Proposition


•  Fabrication of optical lens with high optical magnification, good contrast and diminished aberration

•  Fast and single step process

•  Surface polishing of lens not required.

•  Process provides lens of variable sizes and desirable curvature

•  Fabrication of template or mold for giving desired shape not needed, hence cost is reduced.


Potential Applications


•  Optical microscopy

•  Optical metrology

•  Camera

•  Dentoscope

•  Dermatoscope

•  Enhancoscope

•  Solar cells


State of Development


Use and capability of lenses successfully demonstrated by capturing microscopic images of very small objects.


For further information please contact


Biotechnology Industry Research Assistance Council (BIRAC)

1 st Floor, MTNL Building, 9, CGO Complex,

Lodhi Road, New Delhi- 110003

Phone: + 91 (011) 23219064-67