The vibrational and interferometric performance of optical tables employing automobile inner tubes as vibration isolating elements is investigated. A relation allowing the resonant frequency of a table to be determined during design is presented and verified. Michaelson interferometer fringe drift data is displayed which compares the interferometric performance of two arbitrarily selected inner tube tables to a typical commercial optical table. The use of a bare concrete floor as a suitable optical platform is explored resulting in fringe drift times of 2.6 hours. Table top construction and air current suppression are recognized as more important factors than vibration isolation in establishing interferometric stability at ground floor levels.
A surprising simple 2-D to 3-D visual display process utilizes a mechanical device to integrate four independent 2-D to 3-D visual processes. The quality of the resulting 3-D stereoscopic display approaches that of a "View Master" when ordinary color pictures from a magazine are viewed. The mechanical device which allows the independent processes to be applied is called the "Three-Dimensional Viewing Glasses" {3-DVG, U. S. Patent 4,810,057). An individual must first learn how to use the device; approximately four out of five persons with normal eyesight will experience the effect. Brief exposure to the device can lead to a heightened sense of depth perception when viewing subsequent pictures without use of the device. Familiarity with the process allows an individual to use only their fingers to generate a surprising good stereoscopic display.
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