Donald E Lehmer

Title: The Innovative Contributions of Donald E. Lehmer

Introduction

Donald E. Lehmer, an accomplished inventor based in Berkeley, California, has made significant contributions to the fields of optical systems and pressure measurement technologies. With a total of eight patents to his name, Lehmer's work showcases a blend of innovation and practical application.

Latest Patents

One of his latest patents is focused on a field tester gaze tracking system that utilizes content addressable memories to enhance vision testing. This inventive apparatus allows for the gradual movement of a chin cup to keep the eye being tested aligned with a trial lens frame, ensuring optimal vision correction. During the testing process, it employs alternating infrared illumination to create a high-contrast image of the iris and pupil, which is then analyzed using advanced microprocessor techniques. This approach not only provides improved accuracy but also speeds up data processing to facilitate effective field testing.

Another notable patent is a pressure measurement system featuring a diaphragm and a dedicated chamber. This innovative design allows for fluid to act on one side of the diaphragm while measuring the resultant force with a force transducer, independent of the diaphragm's position. Additionally, a ferromagnetic plate secures a removable coupling with a magnet attached to the force transducer, further enhancing the reliability of pressure measurements.

Career Highlights

Throughout his career, Donald E. Lehmer has worked with leading companies, including Allergan, Inc. and Humphrey Instruments Incorporated. His tenure at these organizations allowed him to craft solutions that address complex problems in the medical technology sector, particularly in vision testing and pressure measurement systems.

Collaborations

Lehmer has collaborated with respected professionals in his field, such as Alan R. Kirschbaum and William E. Humphrey. Their joint efforts have contributed to the advancements in technology that support clinical testing and equipment design.

Conclusion

Donald E. Lehmer's innovative spirit and collaboration with others in the industry have significantly advanced the effectiveness and precision of optical and pressure measurement technologies. His eight patents reflect a commitment to finding solutions that improve patient care and testing methodologies, solidifying his legacy as a notable inventor in his field.