Abstract

The paper is a discussion of a method of scanning employed in a television system. A three dimensional subject is scanned directly by a moving beam of light to produce a picture current in photoelectric cells. This method permits the use of a very intense transient illumination and more than one large aperture photoelectric cell to collect reflected light. These two factors give a highly efficient optical system for producing a picture current at a transmitting station. The image seen at a distant station is the same as if light came out of the photoelectric cells to illuminate the subject and a small aperture lens formed an image of the subject for transmission. The television system transmits only the spacial variations of brightness and not the absolute brightness of the view; consequently, an additional steady illumination of a subject does not affect the reproduced image.

© 1928 Optical Society of America

Optical Conditions for Direct Scanning in Television

Frank Gray and Herbert E. Ives
J. Opt. Soc. Am. 17(6) 428-434 (1928)

The Penetration of Ultraviolet Light into Pure Water and Sea Water*

E. O. Hulburt
J. Opt. Soc. Am. 17(1) 15-22 (1928)

The Spot of Light Reading Device for Galvanometers

T. Townsend Smith
J. Opt. Soc. Am. 17(2) 155-161 (1928)

A New Registering Photodensitometer*

Elmer A. Harrington
J. Opt. Soc. Am. 16(3) 211-222 (1928)

A Suggested Arrangement for the Determination of the Velocity of Light

Noel Deisch
J. Opt. Soc. Am. 16(4) 272-275 (1928)