Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 4761059 | External beam combining of multiple lasers A coupled laser system includes a plurality of substantially parallel beams of coherent radiation with an output beam of coherent radiation at an oblique angle with respect to the plurality of beams. A photorefractive element is positioned to receive the ... | 08/02/1988 |
| 4714902 | Gaseous non linear dispersion laser beam control A method of providing laser controlled real-time optics and optic systems for a laser beam or beams utilizing near resonance nonlinear dispersion in a collision dominated gaseous medium. Refractive optical elements may be provided that function as spheric... | 12/22/1987 |
| 4673257 | Method of and apparatus for correction of laser beam phase front aberrations In accordance with one embodiment of the present invention, a controlling laser beam at a first wavelength is introduced into an interferometer such that one half of it contains the aberrations of the laser beam to be controlled and the other half is and ... | 06/16/1987 |
| 4607916 | Apparatus for controlling the rotation of the plane of linear polarization of linearly polarized radiant energy traversing an element of chromium chalcogenide spinel magnetic semiconductor with elliptically polarized radiant energy Apparatus employing a light beam to affect another light beam. A primary beam of linearly polarized monochromatic light is directed on an element of chromium chalcogenide spinel magnetic semiconductor, specifically single crystal CdCr2 Se4... | 08/26/1986 |
| 4549788 | Intensity of a light beam applied to a layered semiconductor structure controls the beam An optical device includes a layered semiconductor structure having a variable input light beam applied to the structure with an E field component polarized normal to the layers. Intensity of the input light beam controls charge trapped in the layers, the... | 10/29/1985 |
| 4540244 | Opto-optical light deflector/modulator An opto-optical light deflector/modulator has means for providing first and second coherent wave fronts of wavelength (λ0) to travel in a transparent optical active medium to produce an optically generated standing wave that induces a periodic... | 09/10/1985 |
| 4508431 | Photorefractive laser beamsteering device Apparatus for steering a principal beam of electromagnetic radiation consisting of a photorefractive material situated such that the principal beam of radiation passes therethrough, the material being photoconductive and having an index of refraction that... | 04/02/1985 |
| 4490016 | Polarimetric image recorder A polarimetric image recorder which records only the net polarization of the viewed scene. An optical lens system projects the light originating from the viewed scene onto a thin layer of an alkali halide crystal containing anisotropic color centers. Pola... | 12/25/1984 |
| 4247763 | Grid scan range finding apparatus A radiation filter for use in a range determining system to reduce the effects of radiation falling on the edges of a radiation detector used in the system to a greater extent than radiation falling on the central portion of the detector.... | 01/27/1981 |
| 4190811 | Laser controlled optical switching in semiconductors A method and apparatus for switching an infrared radiation signal laser beam in which a semiconductor, capable of transmitting the signal beam without damage, is provided and upon which the signal beam is incident at an angle which may preferably be Brews... | 02/26/1980 |
| 4166254 | Switched diffraction grating A switchable diffraction grating may be formed from an array of color centers in an alkali halide crystal. These gratings will diffract only when the color centers are excited by an external light source, so that they may be switched on and off. The grati... | 08/28/1979 |
