Abstract

The overlapping-monoculars instrument was developed as a result of a study program concerned with wide angle viewing devices for tanks. The instrument is a binocular eyepiece device supplying to the user an undistorted horizontal field of view of 140° and an undistorted vertical field of 90°, thus providing what is believed to be the closest approach yet achieved to the fixated field of unaided human vision. The discussion includes fundamental theory of the device, optical design criteria, and a description of the performance of the system.

© 1962 Optical Society of America

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Figures (8)

Fig. 1
Fig. 1

Illustration of the manner in which a unity-power erecting telescope acts as a constant deviation system.

Fig. 2
Fig. 2

Appearance of the field of view of an overlapping-monoculars system. The dimensions pertain to the research model discussed in the text. (a) View through the instrument. (b) View of system arrangement from above.

Fig. 3
Fig. 3

Graphs of ray trace data for tangential (solid curve) and sagittal (dotted curve) fields of the research model.

Fig. 4
Fig. 4

Graphs of ray trace data for dioptral variations in focus across the exit pupil for various semifield angles in the research model.

Fig. 5
Fig. 5

Graphs of ray-trace data for angular deviations across the exit pupil for various semifield angles in the research model.

Fig. 6
Fig. 6

Illustration of one telescope used in the research model of the overlapping-monoculars system.

Fig. 7
Fig. 7

Rear view photograph of the overlapping-monoculars system showing the adjustable headrest and the cam used to vary the eyepiece interpupillary setting.

Fig. 8
Fig. 8

Photograph of the research model mounted in the commander’s position on a typical armored vehicle.

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