Company Filing History:
Years Active: 1976-1983
Title: Alfred J. Thelen: Innovator in Optical Coating Technology
Introduction
Alfred J. Thelen is a notable inventor based in Santa Rosa, CA (US). He has made significant contributions to the field of optical coatings, holding a total of 2 patents. His work focuses on developing advanced optical filters and vapor deposition apparatus, which have applications in various optical communication systems.
Latest Patents
One of Alfred J. Thelen's latest patents is for a non-polarizing thin film edge filter. This innovative optical filter features a bandpass reflectance characteristic, with one of the transition wavelength edges being non-polarizing for radiation incident at a preselected non-normal angle. The filter consists of a transparent substrate and a multilayer thin film optical coating on one surface. The optical coating is designed with a specific number of alternate layers of higher and lower refractive index dielectric materials, arranged in a sequence of dielectric multilayer stacks. The design includes detuned spacer layers to align the wavelength transition edges for different polarization planes. This technology is also applicable in simplex and duplex fiber optic communications systems.
Another significant patent by Thelen involves a vapor deposition apparatus with mask means. This apparatus features multiple spaced substrates on a rotatable support, with a vapor source positioned below and offset from the axis of rotation. A mask extends approximately 180 degrees, ensuring that the effective vapor stream is generally normal to the exposed substrates. Additionally, a continuously exposed monitor chip is included to enhance the deposition process.
Career Highlights
Alfred J. Thelen has dedicated his career to advancing optical coating technologies. He is currently associated with Optical Coating Laboratory, Inc., where he continues to innovate and develop new solutions in the field. His expertise in thin film technology has positioned him as a key figure in optical engineering.
Collaborations
Throughout his career, Thelen has collaborated with notable colleagues, including John A. Aguilera and James N. Grant. These partnerships have contributed to the development of cutting-edge technologies in optical coatings.
Conclusion
Alfred J. Thelen's contributions to optical coating technology through his patents and collaborations highlight his role as an influential inventor in the field. His work continues to impact the development of advanced optical systems.