A method and apparatus for information retrieval wherein an endless film recording informations thereupon is advanced and the counting is started upon detection of the zero (reference) position of said film and when the counting reaches a predetermined value, the film is automatically stopped.

Image-bearing elements made of support material that transmits light longitudinally through its cross-section, in a plane parallel to its image-bearing surface, are disclosed for use in an information retrieval system. The retrieval code used in identifying each element is generated by modulating a directed beam of light transmitted longitudinally through the element's cross-section. Modulation of the directed beam is accomplished by, for example, placing opaque spots on a cross-sectional area o...

The optical transitions of extrinsically optically active insoluble materials become optically active and circularly dichroic when in contact with optically negative liquid crystalline materials thereby providing unusual and highly advantageous properties. The circularly dichroic optical properties induced in the extrinsically optically active insoluble materials can be utilized for information transfer applications.

An information input device comprising a plurality of switches, each of which is operated by an external instruction, and an input circuit for processing signals fed from any one of said switches by means of input lines which are provided for connecting the switches and the input circuit through input terminals, wherein number of the input terminals are advantageously reduced to a small number. To this end, timing signals generated in different times are applied to the respective input lines, an...

A layered information record contains superimposed frames of information wherein a first frame contains luminance information of a scene as density variations of a cyan dye. A second frame superimposed on the first frame contains color encoded chrominance information as density variations of a yellow dye. In a system for playing back the layered information record, white light is projected through the superimposed first and second frames of information and viewed through a red filter for extract...

In a system for transferring information stored in a first shift register to a second shift register, information is transferred from the first shift register to the second shift register with timing different from the timing with which the information is stored in the first shift register.

A field effect transistor is controllably biased to switch between conductive and non-conductive conditions. One of its electrodes, preferably the source, is coupled to a memory capacitor, and another of its electrodes, preferably the drain, is coupled to a signal source that provides an input signal to be memorized. Advantageously, the signal source is a photosensitive element such as a photo diode or photovoltaic element. While the field effect transistor is conductive, the memory capacitor is...

A physiological function monitor module is provided. The module comprises a physiological function rate detector circuit adapted to receive an input from a patient and convert the same to a DC voltage output signal proportional to the rate of the physiological function of the patient under consideration. The module further includes an alarm generator connected to the output of the detector circuit. The alarm generator includes means for comparing the DC voltage level of the detector circuit to a...

An information recording system is disclosed in which a digital information recorded on a recording medium is read out, and the digital information is converted into optical patterns with darker and light densities so as to represent the logic "1" and "0." Thereafter the optical patterns are recorded on a microfilm as the dark and light images which represent the logic "1" and "0" and are available for timing or sync signals.

A wideband holographic information storage system records Fourier holograms on film in rapid succession, each hologram storing 128 bits of data. The hologram fringe pattern is held stationary by varying the reference beam frequency to track the variations of frequency of the signal beam that are caused by acousto-optic modulation of the signal beam. Holograms are successively recorded in adjacent positions by scanning a light beam across a photosensitive film with a rotating polygonal mirror, th...