Patents by Inventor Hermann Flad

Hermann Flad has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Optical arrangement for illuminating an object with the light of a sharply limited spectral region of the radiation of a luminous source
    Patent number: 3947092
    Abstract: A light beam splitter comprises a light transmissive support which comprises a colored glass having an absorption edge spectrally limiting the reflection of the light splitter. A multilayer interference coating is applied to the colored glass and it includes two adjacent filter spectral region working ranges and it transmits one spectral region of one filter working range and reflects the other adjacent working range. The interference coating has a ratio of optical thickness of the low refraction to the high refractive layers of from 1 to 2 to 1 to 9. The colored glass support is advantageously formed with an absorption edge at the short wave side of the wave length centroid of the spectral region to be reflected by the light splitter.
    Type: Grant
    Filed: November 8, 1974
    Date of Patent: March 30, 1976
    Assignee: Balzers Patent- und Beteiligungs AG
    Inventor: Hermann Flad