Browse Prior Art Database

Storage Device

IP.com Disclosure Number: IPCOM000095478D
Original Publication Date: 1964-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Sliter, DD: AUTHOR [+2]

Abstract

The device is for data storage in a strip of color film by controlling the intensity of exposure of the film to each of three colors.

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Storage Device

The device is for data storage in a strip of color film by controlling the intensity of exposure of the film to each of three colors.

Data to be stored is supplied to an encoder which converts the data into corresponding intensity level signals in each of three channels. These signals are supplied to glow modulator tubes 10 to produce modulated intensity light beams. Such are projected through filters 11 corresponding to the three complementary colors, blue-cyan, magenta and yellow. The light passing these filters is guided by light pipe members 12 through a lens to an incremental area of film 13 on which the data is to be stored. Utilizing five intensity levels in each of the three complementary colors, there results a 53 binary equivalent storage in each resolution area of the color film.

After exposure to the modulated light, the film is developed and passed to a read station. Here, light is projected through an incremental area of the film to light pipe members 14. Each light pipe member has associated with it a filter 15 corresponding to one of the primary additive colors, red, blue and green. Utilizing color rejection techniques, the intensity level of the different color components in the beam of light projected through film 13 is detected. The blue filter absorbs substantially all yellow light, passing substantially all of the magenta and blue-cyan light. The difference in intensity of the light beam before and after passage through the blu...