Herbert A French

Title: The Innovative Contributions of Herbert A French

Introduction

Herbert A French is a notable inventor based in Emsworth, GB, recognized for his significant contributions to the field of optical technology. With a total of 6 patents to his name, French has developed innovative solutions that address complex challenges in electromagnetic radiation measurement and filtering.

Latest Patents

One of his latest inventions is a spectral filter designed to remove coherent radiation from a source in a field of view, independent of the source's size. This filter comprises a first reticle located in the path of received light, a first lens that produces an optical transform of the first reticle at a second reticle in the image plane of the first lens, and a second lens that produces an optical transform of the second reticle. The arrangement allows for the spatial transmittance of the third reticle to block part of the diffracted image of the first reticle, which is characteristic of coherent radiation. This innovative design enables the blocking of light from a coherent source while allowing polychromatic light to pass through.

Another significant patent is a passive rangefinder that determines the range to objects such as aircraft, rockets, or missiles emitting electromagnetic radiation. This device utilizes spectral measurements across a broad frequency range. It includes components for forming a real image of the field of view, spectrophotometer means for receiving part of the real image, and dispersion means for separating radiation of different wavelengths. The rangefinder's detector measures the spectrum of radiation, and the output is processed to derive a characteristic temperature of emission, which is then used to calculate the range to the object.

Career Highlights

Throughout his career, Herbert A French has worked with esteemed organizations, including the Secretary of State for Defence in Her Britannic Majesty's Government and Qinetiq Limited. His work in these institutions has allowed him to apply his innovative ideas in practical settings, contributing to advancements in defense and technology.

Collaborations

French has collaborated with notable individuals in his field, including Philip Sutton and William Dawber. These partnerships have likely fostered an environment of creativity and innovation, leading to the development of groundbreaking technologies.

Conclusion

Herbert A French's contributions to the field of optical technology and electromagnetic radiation measurement are significant. His innovative patents and career achievements reflect his dedication to advancing technology and solving complex problems.