Company Filing History:
2 out of 6 
1 out of 1 
1 out of 6 Years Active: 1992-2016
Title: Ephraim Greenfield: Innovator in Optical Power Measurement
Introduction
Ephraim Greenfield is a renowned inventor based in Jerusalem, Israel, who has made significant contributions to the field of optical power measurement. With a total of four patents to his name, Greenfield's work has helped to advance the precision and efficiency of energy measurement technologies. His latest patents showcase his innovative approach to solving complex challenges in energy measurement.
Latest Patents
One of Greenfield's notable inventions is the "Fast response thermopile power sensor." This device is designed to measure power from an optical beam by utilizing the temperature difference across a thin layer of heat insulating material. The temperature difference is generated by the axial flow of an absorbed beam from an absorber layer to a cooled heat sink. The sensor disc incorporates a continuous matrix of adjacent thermocouple junctions, where the thicker regions become hot junctions and the thinner regions become cold junctions. The sum of the voltages generated by these thermocouples correlates directly with the incident optical power.
Another significant invention is the "Device and method for measurement of incident power and energy." This invention includes devices and methods that enable enhanced accuracy in measuring low energy values. The device comprises a housing containing two sensors; one sensor measures energy from a defined source while the second sensor measures only ambient energy. By subtracting the output of the second sensor from the first, a more accurate corrected output is achieved, enhancing the precision of energy measurement.
Career Highlights
Ephraim Greenfield has had a successful career, working with notable companies such as Ophir Optronics Ltd. and Ophir-Aryt Optronics, Ltd. These affiliations have allowed him to leverage his expertise and contribute to cutting-edge technology in optical measurement.
Collaborations
Throughout his career, Greenfield has collaborated with talented individuals, including colleagues Jacob Julian Vecht and Ben-Zion Halperin. Their teamwork has undoubtedly enriched his projects and contributed to his accomplishments in the field.
Conclusion
Ephraim Greenfield's innovative spirit and dedication to advancing optical power measurement technologies are reflected in his impressive portfolio of patents. His inventions, particularly in the realm of thermopile sensors and energy measurement devices, have established him as a key figure in his field. As he continues to develop new ideas and products, Greenfield remains an inspirational inventor within the community.