Wolfgang Doetter

Title: Wolfgang Doetter: Innovator in Electric Lamp Technology

Introduction

Wolfgang Doetter is a notable inventor based in Aachen, Germany. He has made significant contributions to the field of electric lamp technology, holding a total of 2 patents. His innovative designs focus on enhancing the efficiency and functionality of electric lamps.

Latest Patents

One of Wolfgang Doetter's latest patents is an electric lamp that employs a lamp vessel, which is transparent to visible light and accommodates a light source. The lamp vessel is covered with a combination of a light-absorbing medium and an optical interference film. This film consists of layers of alternately a first layer of a material with a comparatively high refractive index and a second layer of silicon dioxide. The spectral transmission of light transmitted by the light-absorbing medium changes from T ≤ 0.15 to T ≥ 0.75 in a wavelength range having a width of λ ≤ 50 nm. The variation in reflection amounts to less than 10% in the wavelength range of 400 ≤ R ≤ 690 nm, with the reflection lying in the range of 50 ≤ R ≤ 90%. In operation, the electric lamp emits colored light in the transmission mode and has a substantially color-neutral appearance in the off state. Another patent involves an electric lamp having an optical interference filter made of alternating layers. This thin film interference filter consists of alternating first and second layers, with the first layers being silica and the second layers being a mixture of tantala and niobia. This filter can be used on a high-temperature lamp in an inert atmosphere if the niobia in the mixture is less than 40% by weight.

Career Highlights

Wolfgang Doetter has worked with prominent companies in the industry, including Philips Electronics North America Corporation and Koninklijke Philips Corporation N.V. His experience in these organizations has contributed to his expertise in electric lamp technology.

Collaborations

Throughout his career, Wolfgang has collaborated with notable individuals such as Ray G. Gibson and Eduardus Johannes Cottaar. These collaborations have further enriched his work and innovations in the field.

Conclusion

Wolfgang Doetter's contributions to electric lamp technology demonstrate his innovative spirit and commitment to advancing the industry. His patents reflect a deep understanding of optical technologies and their applications in everyday lighting solutions.