 Recording and/or reproducing apparatus, particularly with means for searching for vacant tracks |
| An object of the present invention is to provide a recording and/or reproducing apparatus which ... |
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| Receiving apparatus including a display for displaying the amount of unrecorded memory |
| It is the first object of the present invention to provide a receiving apparatus which can solve ... |
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| 3D virtual reality multi-user interaction with superimposed positional information display for each user |
| It is therefore an object of the present invention to allow a user to easily recognize the position ... |
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| Video signal selecting device |
| It is therefore an object of the present invention is to provide a video signal selected device ... |
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| Method and apparatus for constructing, storing and displaying characters |
| This invention provides a computer system for creating graphic characters for display on a video ... |
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| Bi-directional bus system and transmitting, receiving, and communication methods for same |
| This invention has been made in view of actual circumstances as stated above, and its object is to ... |
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| Method and apparatus for providing dual language captioning of a television program |
| Thus, it is a general object of the present invention to provide means for recording, encoding, ... |
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| Methods and apparatus for concurrently acquiring video data from multiple video data sources |
| The aforementioned objects are obtained by the present invention which provides, in one aspect, a ... |
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| Compressed data recording method using integral logical block size and physical block size ratios |
| It is therefore an object of the present invention to provide a method of recording compressed and ... |
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Environmentally sensitive compositions of matter based on 3H-fluoren-3-ylidenes and process for making same
| Details |
Inventors: Goetz, Frederick James;
Assignee:
Primary Examiner: Healy; Brian
Assistant Examiner:
Attorney, Agent or Firm:
The present invention relates to compounds and derived materials based on compositions of matter consisting of appropriately substituted 3H-fluoren-3-ylidenes shown in figure A wherein the large dots (.circle-solid.) represent specific substituents define in the invention. ##STR1## These compounds and derived materials are able to undergo substantial changes in their optical properties in response to environmental changes. Such compounds and materials, for example, undergo substantial changes in their optical emission and absorption as well as refraction in different environments. In addition, by virtue of their ability to undergo permanent changes in refraction on exposure to certain predetermined wavelengths of radiation, the compounds and materials are photoprocessable by conventional techniques for the fabrication of optical devices and circuits, for computer, telecommunications, entertainment, defense, and sensor applications. A major subclass of the subject compounds and materials possess strong luminescence, optical, absorption, and refraction in the near infrared region of the electromagnetic spectrum which permits ready integration into electronic, electrooptic, and optic solid state components, devices, and systems. |
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DETAILED DESCRIPTION OF THE INVENTION The Preferred Embodiment of the Invention: General Introduction The preferred embodiment of the present invention includes a specific class of compounds and materials embodying the 3H-fluoren-3-ylidene molecular orbital depicted as figure A below wherein the large dots (.
circle-solid.
) represent specific substituents, the nature of which is defined in detail below.
##STR3## This frontier molecular orbital is the basis of the unique luminescent and electrooptical properties of the derived compounds and materials described in detail below.
These properties include substantial environmental sensitivity of the optical and electrooptical properties of these compounds and materials.
In addition, these compounds and materials readily lend themselves to incorporation into useful devices and circuits by virtue of their amenability to conventional photoprocessing techniques currently employed for this purpose and are exemplified in detail below.
Processes for making these compounds and derived materials, including several types of polymeric derivatives, and several kinds of derived devices are described in detail below.
Therefore, within the preferred embodiment of this invention, the following are described in detail: detailed description of compounds; specific synthetic processes for compounds; specific processes for materials including polymers; specific sensor devices and fabrication processes; and, specific optoelectronic devices and fabrication processes.
Most of the processes for elaborating functionality in compounds and materials, excepting only processes for constructing the 3H-fluoren-3-ylidene entity, and all processes for devices are well known to those skilled in the art.
The Preferred Embodiment of the Invention: Detailed Description of Compounds One aspect of this invention relates to a luminescent, polarizable, and highly refractive appropriately substituted 3H-fluoren-3-ylidene compound capable of undergoing a rapidly reversible change in luminescence, light absorption and refraction due to environmental changes
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