Other

Glenn B Shelton

James C Fletcher

William A Hurd

Robert P Brealt

Gary H Hunt

Charles L Wyman

Bill B Fannin

Donald B Griner

Charles A Hawkins

An apparatus for measuring the effectiveness of stray light suppression light shields and baffle arrangements used in optical space experiments. The light shield and baffle arrangement and a telescope model are contained in a vacuum chamber. A source of short, high-powered light energy illuminates portions of the light shield and baffle arrangement and reflects a portion of same to a photomultiplier tube by virtue of multipath scattering. The resulting signal is transferred to time-channel electronics timed by the firing of the high energy light source allowing time discrimination of the signal thereby enabling the light scattered and suppressed by the model to be distinguished from the walls and holders around the apparatus.

System for the measurement of ultra-low stray light levels

A notch filter for the selective attenuation of a narrow band of frequencies out of a larger band wherein a helical resonator is connected to an input circuit and an output circuit through discrete and equal capacitors, and a resistor is connected between the input and the output circuits.

Notch filter

Growing community of inventors

Huntsville, AL, United States of America

Glenn B Shelton