Innovation Sphere




Project TitleA Proposal for Broad-band Omnidirectional Antireflection Coatings
Track Code2006-31
Short Description
TagsMaterial Science
Posted DateApr 29, 2016 12:37 PM


Girish Agarwal
Subhasish Gupta


Steve Price


Antireflection (AR) coatings are often used to increase light throughput and coupling efficiency in optical instruments and fiber optic components. Traditional AR coatings almost exclusively rely on the properties of quarter wave plates, which still propose issues involving the inadequacies of limited wavelength and angle of incidence range. This limited ability prevents films that are designed for an exclusive wavelength range or angle to not be suitable for other purposes. Unfortunately, this then eliminates the ability to produce a sort of “off-the-shelf” antireflection coating products that could then be used for every day and easy use. This is to mean that because of these limitations, it is rather difficult to produce mass quantities of these very specific coatings and instruments for the use of every day needs.


The technology being proposed aims to show that the limitations and restricted abilities of the current practices can, in fact, be overcome and improved upon. The new design of a broad-band antireflection coating bases its principle on the concept of reflection-less potential in which total transmission can be offered in reference to one-dimensional light scattering. The realistic and refractive index profiles can be constructed so that it leads to almost no or null reflection. Because of this, the choice of these index profiles are truly infinite and can lead to extremely low reflection over a broad range of wavelengths and angles. Additionally, the new design presented then allows for broad-band omni-directional AR coatings to be developed and produced in order to improve current optical and fiber optic components and instruments.

Potential Applications

  • Optical components
  • Telescope lenses
  • Efficient couplers (e.g., fiber optics and optical communications)

Main Advantages

  • Utilizes reflection-less potential
  • Low reflection over a broad range of wavelengths
  • Infinitely increases available index profiles for use

Stage of Development

Proof of concept.  

Contact Information

Please contact for more information.

Intellectual Property

Patent Number Issue Date Type Country of Filing
20090323190 None Utility United States