摘要:
A construction for reducing image artifacts in electro-optic imaging apparatus of the kind having (i) a linear array of spaced, selectively activatible, light valve elements having generally equal element widths, (ii), an optical system for forming an image of the light valve at a linear image zone and (iii) a mirror for scan-indexing the array image along said image zone. The spacings between array elements increase progressively from the center to the ends of the array to obviate under or over scan of adjacent image regions.
摘要:
A linear light valve array having transversely driven, discretely addressable, electro-optic gates which selectively change the polarization of incident light is disclosed. The array has a plurality of spaced gates. Each gate includes a planar light receiving top surface which receives incident polarized light, and first and second spaced parallel electrode receiving surfaces that are arranged substantially normal to the top receiving surface. Discretely addressable electrodes are formed on such receiving surfaces. In response to an applied voltage, the electrodes of a gate establish a transverse electric field which changes the plane of polarization of light passing through the gate and substrate. In another aspect of this invention, a method of making such a linear light valve array is disclosed. In accordance with this method, a strip of photoresist material is formed on a wafer of electro-optic material. Grooves are then cut in the wafer on each side of the strip. A conductive layer is formed on the top surface of the wafer in the grooves and on the strip. The photoresist and its overlying conductive layer are removed. A plurality of evenly spaced parallel grooves are then cut in the wafer to define the gates.
摘要:
An electrooptic device for scanning and information modulating a plurality of light beams across an image zone is disclosed. The device includes a substrate formed of electrooptic material that changes its birefringence in response to an electric field established therein. A time-varying electric field is established in a portion of the substrate which varies the substrate refractive index so as to deflect an incident linear light beam. The device includes a lens arrangement which forms the deflected light beam into a plurality of beams focused at the image zone, and a light valve array which has a pixel portion for each focused light beam. Voltage signals applied to selected ones of a plurality of modulating electrodes of the light valve array cause selected ones of the array pixel portions to change their birefringence and change the polarization vector of their focused light beams as the beams are scanned across the image zone.
摘要:
Two panels, each having a plurality of electrically-addressable, parallel light valve strips are arranged along an optical axis between entrance, exit and intermediate polarizing means. The strips of the respective panels are generally perpendicular and the entrance and exit polarizing means have their directions of polarization mutually aligned and perpendicular to the intermediate polarizing means. By sequentially activating the strips of a first panel and imagewise addressing the strips of the other panel during each such sequential activation an area image is formed.
摘要:
Apparatus and method for minimizing a red-dot artifact in the eye of a flash photograph subject employs a subject conditioning pre-flash, predeterminedly preceding the camera picture-taking operation, to reduce the pupil size prior to exposure flash and shutter actuation.
摘要:
Electronically controlled imaging with a multicolor mixture of photoconductive particles is effected in a single exposure cycle by provision of an addressable electrode array which is energized selectively in imagewise timed relation. The control device for the imaging system has a plurality of sensing elements for measuring the color density values of successive lines of an original to be reproduced and producing a signal in response to the density measurement to regulate the length of time that the electrode array is energized.
摘要:
A photographic camera system is disclosed in which LEDs are used to record different gray levels or colored information on the film and an optical image of a subject is also recorded on the film.
摘要:
A frequency converter/mixer has a crystalline substrate which supports an inorganic, crystalline, nonlinear optical thin film having a higher index of refraction than the substrate, to form an optical waveguide. Input radiation of frequency .omega..sub.1 which enters the waveguide propagates through the waveguide and exits as radiation having a different frequency .omega..sub.2. The frequency conversion of the input radiation is accomplished by first-order quasi-phase-matching the input and output signals as a result of the periodicity of the sign-alternating nonlinear dielectric susceptibility coefficient of the optical thin film over an active region of the waveguide. A method of first-order quasi-phase-matching is also disclosed.
摘要:
A conductive film of crystalline bismuth mixed alkaline earth oxide containing silver is disclosed. A process for promoting the growth of crystalline bismuth mixed alkaline earth oxide grains by incorporating silver prior to sintering is also disclosed.
摘要:
Articles are disclosed in which an electrically conductive layer on a substrate exhibits a superconducting transition temperature in excess of 30.degree. K. Conductive layers are disclosed comprised of a crystalline rare earth alkaline earth copper oxide. Processes of preparing these articles are disclosed in which a mixed metal oxide precursor composition is coated and heated to its thermal decomposition temperature to create an amorphous mixed metal oxide layer. The amorphous layer is then heated to its crystallization temperature.