Document Type

Thesis

Degree

Master of Science (MS)

Department

Physics

First Advisor's Name

Richard A. Bone

First Advisor's Committee Title

Committee Chair

Second Advisor's Name

John T. Landrum

Third Advisor's Name

Yesim Darici

Fourth Advisor's Name

Stephan Mintz

Date of Defense

11-18-1994

Abstract

The temporal frequency response characteristics of the human visual system have been investigated by combining the increment threshold and sinusoidal flicker methods. Gain and phase spectra were obtained for two subjects using improved equipment and methodology compared with previous investigations. While the output of the system for sinusoidal input stimuli was generally also sinusoidal, as required for a linear system, other non-linearities emerged. Gain spectra for both subjects indicated a low-pass filtering action. Phase spectra showed a possible low frequency phase lead followed by a high frequency lag. Earlier studies suggested that the system might be a minimum phase system and, as such, would allow the phase spectrum to be derived from the gain spectrum via the Kramers-Kronig relations. This possibility was examined in light of the measured gain and phase spectra and found to be implausible.

Identifier

FI14060183

Comments

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