RAMOT at Tel Aviv University Ltd.

All-optical Imaging System with Extended Depth of Field

Posted by RAMOT at Tel Aviv University Ltd.Responsive · Innovative Products and Technologies · Israel

Summary of the technology

All-optical Imaging System with Extended Depth of Field
Project ID : 7-2007-63

The Invention

The All-optical imaging system allows for real time, on line imaging without having to adjust or align the system. The system’s modified lens provides a high depth of field, namely, an extended region within which the image is kept in focus without the need for an auto focus mechanism or a post-processing step. The technology is based on a non-absorptive composite phase mask (CPM), consisting of several spatially multiplexed Fresnel Lenses (FL) that are used in conjunction with the primary lens of the system. When positioned in the pupil of an imaging system, the CPM increases the depth of field (DOF) significantly.

The Need

Cameras without adaptive optics such has cell phone cameras have problems in focusing images over a broad range of distances, perturbations and lighting conditions. A low cost solution to improving imae resolution is needed. Other areas where this need is felt are machine vision inspection and bar code readers.


Due to its large depth of field capability, the system can also be designed to capture images of objects located in non-congruent regions, something conventional optical systems cannot do.

Stage of Development

Prototype masks and restoration algorithms have been prepared and tested showing significant improvement on out of focus images.


2 US patents on mask geometries and PCT on imaging system.

Project manager

Oren Calfon
VP Business Development, ICT

Project researchers

Emanuel Marom
T.A.U Tel Aviv University, Engineering
Physical Electronics

Related keywords

  • Electronics, Microelectronics
  • Electronic circuits, components and equipment
  • Electronic Components
  • Some other electronics related
  • Electronics and Electro-Optics
  • Electronics and Electro-Optics
  • optical systems

About RAMOT at Tel Aviv University Ltd.

Technology Transfer Office from Israel

Ramot is Tel Aviv University's (TAU) technology transfer company and its liaison to industry, bringing promising scientific discoveries made at

Send your request

By clicking "Send your request" you are signing up and accepting our Terms of Service and Privacy policy

Technology Offers on Innoget are directly posted and managed by its members as well as evaluation of requests for information. Innoget is the trusted open innovation and science network aimed at directly connect industry needs with professionals online.