摘要:
A fully integrated electro-optic page-scanner comprises an optically-transparent waveguide made from an electro-optic polymer formed as a Langmuir-Blodgett film, and a linear array of electrically-addressable, spaced, parallel electrodes for selectively altering the refractive index across pixel-sized portions of the polymeric waveguide. Parallel addressing of the electrodes in accordance with the intensity pattern of a line of pixels to be recorded acts to modulate the phase front of an optical wave propagating within the waveguide in accordance with such line intensity pattern. Schlieren optics, also integrated with the page-scanner, convert the phase-front-modulated wave to an intensity-modulated pixel pattern which can be imaged onto a moving photosensitive recording element to record a two-dimensional (page) of image information. By using an electro-optic polymer formed as a Langmuir-Blodgett film as the waveguide, certain disadvantages of prior art scanning devices are eliminated.
摘要:
A fully integrated electro-optic page-scanner comprises an optically transparent waveguide made from an electro-optic polymer, and an electrode structure including a linear array of electrically-addressable, spaced, parallel electrodes for selectively altering the refractive index across pixel-sized portions of the polymeric waveguide. According to the invention, the addressable electrodes are disposed on a photoconductive substrate which facilitates poling of the polymer waveguide to rander it electro-optic in nature. During the poling process, the photoconductive substrate is made electrically conductive by flood illumination, while a uniform electric field is established between the substrate and a transparent electrode which overlies the waveguide layer, opposite the addressable electrodes. Preferably, the photoconductive substrate comprises undoped silicon which enables certain electrode-addressing circuitry to be integrated within the scanner structure.
摘要:
A fully integrated electro-optic page-scanner comprises an optically-transparent waveguide made from an electro-optic polymer, and a linear array of electrically-addressable, spaced, parallel electrodes for selectively altering the refractive index across pixel-sized portions of the polymeric waveguide. Parallel addressing of the electrodes in accordance with the intensity pattern of a line of pixels to be recorded acts to modulate the phase front of an optical wave propagating within the waveguide in accordance with such line intensity pattern. Schlieren optics, also integrated with the page-scanner, convert the phase-front-modulated wave to an intensity-modulated pixel pattern which can be imaged onto a moving photosensitive recording element to record a two-dimensional (page) of image information. By using an electro-optic polymer as the waveguide, certain disadvantages of prior art scanning devices are eliminated.
摘要:
In a method for forming lenslets which collect light and focus it onto photosensitive elements of an electronic imager includes providing a transparent lenslet-forming layer on a substrate or on layers on the substrate, (a) providing a transparent polyester lenslet-forming layer on a substrate or on layer(s) on the substrate, the polyester containing repeat units, in part, having the structure ##STR1## wherein: n is 2 or greater; x is selected from the group consisting of H, CH.sub.3, Br and Cl; and Z is selected from the group consisting of nil, O, S, CH.sub.2, C.dbd.O, SO, SO.sub.2, CH--CH.sub.3, CH.sub.3 --C--CH.sub.3, CF.sub.3 --C--CF.sub.3, CH.sub.3 --C--CH.sub.2 CH.sub.3, ##STR2## (b) forming a thin etch-stop layer on the transparent lenslet-forming layer and patterning the etch-stop layer to form a mask so that the pattern corresponds to lenslets to be formed; (c) anisotropically plasma etching the transparent lenslet-forming layer according to the pattern; (d) removing the thin etch-stop mask; and (e) thermally reflowing the patterned transparent layer to form the transparent lenslets.
摘要:
A method for forming lenslets which collect light and focuses it onto photosensitive elements of an electronic imager includes providing a transparent lenslet-forming layer on a substrate or on layers on the substrate and forming a thin etch-stop layer on the transparent lenslet-forming layer and patterning the etch-stop layer so that the mask pattern corresponds to lenslets to be formed, The method further includes anisotropically plasma etching the transparent lenslet-forming layer according to the thin etch-stop mask pattern, removing the thin etch-stop mask, and thermally reflowing the patterned transparent layer to form the transparent lenslets.
摘要:
A method for forming lenslets which collect light and focus the light onto photosensitive elements of an electronic imager. The method includes providing a transparent lenslet-forming layer on a substrate or on layers on the substrate, forming a thin etch-stop layer on the transparent lenslet-forming layer and patterning a thin photosensitive resin mask on the etch-stop layer so that the mask pattern corresponds to lenslets to be formed. The method further includes transferring by etching the pattern of the photosensitive resin mask to the thin etch-stop layer to form a thin etch-stop mask, anisotropically plasma etching the transparent lenslet-forming layer according to the patterned thin etch-stop mask, removing the thin etch-stop mask, and thermally reflowing the etched transparent lenslet-forming layer to form the lenslets.
摘要:
Apparatus for writing and/or reading information on a recording element comprises an integrated optical write/read head of the type comprising a planar optical waveguide and means for deflecting a guided beam of radiation out of the waveguide at an egress zone and for bringing such beam to a focused spot on a desired data track on the recording element. Means, responsive to any displacement of such focused spot from a desired data track, is provided for selectively varying the effective refractive index of the waveguide in the vicinity of the egress zone in order to vary the tracking position of the spot. Such means comprises a pair of spaced parallel electrodes in close proximity to the egress zone, and means for producing an electric field between such electrodes, such field varying with the tracking error.
摘要:
A method for forming lenslets of a solid-state imager, includes providing a first etch-stop layer on a spacer layer formed on a substrate or layer(s) on a substrate; providing a patterned first photosensitive resin layer to form a first mask pattern; performing an etch transfer of the first mask pattern to the first photosensitive resin layer to form a first etch-stop mask pattern, and removing the first photosensitive resin layer; providing a transparent lenslet-forming layer on the spacer layer. The method further includes forming a second etch-stop layer on the transparent lenslet-forming layer to form a second mask pattern and patterning a second photosensitive resin layer on the second etch-stop layer wherein the second mask pattern corresponds to the lenslet array to be formed and wherein the lenslet array defined by the second mask pattern is aligned to the array of open regions of the first etch-stop mask pattern; transferring by etching the pattern of the second photosensitive resin layer to the second etch-stop layer to form a second etch-stop mask pattern; anisotropically plasma etching the transparent lenslet-forming layer according to the second etch-stop mask pattern; anisotropically plasma etching the spacer layer according to the first etch-stop mask pattern; isotropically etching to remove remaining portions of the first etch-stop layer forming the first etch-stop mask and portions of the second etch-stop layer forming the second etch-stop mask; and thermally reflowing the patterned transparent lenslet-forming layer to form the lenslets on the solid-state imager.
摘要:
An optical, waveguide, quasi-phase-matching frequency converter has integral means to vary the efficiency of the quasi-phase-matching frequency conversion process resulting in intensity modulation of the device output; said frequency converter has integral means to optimize the quasi-phase-matching frequency conversion process resulting in optimum device output; and said frequency converter has integral input signal polarization mode conversion means in optional combination with the conversion optimization means for modulating the optimized device output. Methods for modulating and optimizing the quasi-phase-matching frequency converted signal by electro-optically controlling the dispersion of the frequency converting medium are also disclosed.
摘要:
A quasi-phase matching optical waveguide for producing a second harmonic of an internally propagated polarized laser beam having a wavelength in the range of from 700 to 1300 nm is disclosed. The waveguide is comprised of at least one array of laterally spaced transparent electrodes in direct contact with a transmission medium containing similarly polar aligned organic molecular dipoles in overlying areas. The transparent electrodes and overlying areas of the transmission medium are each of the same width and spacing.