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| Number | Title | Issue Date |
| 5877901 | Super wide-angle zoom lens A super wide-angle zoom lens includes at least a negative first lens group and a positive second lens group, in this order from an object side. A zooming operation is carried out by relatively moving the lens groups. When a photographing area is defined b... | 03/02/1999 |
| 5404245 | Automatic light valves with polymeric layer containing network of bonds A structure consisting of two cover layers sandwiching a polymer and solvent layer is useful for making automatic light valves. Mechanical and optical properties are improved by a novel continuous network of bonds which transmit stresses from one cover la... | 04/04/1995 |
| 5227859 | Passive coherent radiation detection system Holographic optical elements are utilized for discriminating between monochromatic, coherent radiation and broadband, noncoherent radiation in passive coherent radiation detection systems such as aircraft warning systems and submarine laser communication ... | 07/13/1993 |
| 4758090 | Optical wavelength monitor using blazed diffraction grating A wavelength monitor (25) uses a diffraction grating (35) and a beam splitter (31). Light from a superluminescent diode (SLD) is supplied to the beam splitter (31) and is projected onto the grating (35). The grating is formed by holographically projecting a di... | 07/19/1988 |
| 4620089 | Automatic optical focusing device An auto-focus system for focusing reflecting objects which are under investigation in a measuring device. The invention comprises a light source for producing an illumination beam for illuminating an object plane of an objective lens to be focused, an ima... | 10/28/1986 |
| 4492468 | Interferometer for the real time display of deformations of vibrating structures Display device in which an interferometric hologram corresponding to the vibrations of the object is recorded in a photosensitive electrooptical material. The corresponding interferogram is collected on the directly transmitted object beam by the recordin... | 01/08/1985 |
| 4392745 | Tilt head camera for interferometric analysis of tires An adjustable camera is operative to perform interferometric analysis of areas on the surface of an object such as a vehicle tire using light from a coherent source. The camera mechanism includes vertical guides projecting upwardly from a support moveable... | 07/12/1983 |
| 4350443 | Optical fringe analysis An apparatus for measuring in-plane surface displacement utilizing speckle diffraction interferometry. A double exposure specklegram is incrementally illuminated with a narrow laser beam. The diffraction pattern created upon passing through the specklegra... | 09/21/1982 |
| 4272192 | Holographic shearing interference contrast method and interferometer A transparent object can be converted into a visible image which is made up of a contrasted image of light and shade and therefore is readily perceivable with a three-dimensional illusion sensation by a method which comprises forming holograms with each o... | 06/09/1981 |
| 4225237 | Tire checking apparatus An apparatus for a laser interferometric tire checking in which a thermoplastic film serves as light sensitive layer, and in which optical members are provided in the path of the object beam diffusely reflected by the inner surface of the tire. By means o... | 09/30/1980 |
| 4118124 | Holographic shearing interferometer The sheared interference fringe of a wavefront from an object under test is obtained by recording on a first hologram the interference fringe formed between a first reference light beam and two light beams having slightly different angles of incidence wit... | 10/03/1978 |
| 3997266 | Lens testing using total internal reflection holography Accurate, rapid and inexpensive testing and inspecting of lens surfaces tugh holographic means requiring no beamsplitters, mirrors or overpower optics, and wherein a hologram formed in accordance with one aspect of the invention contains the entire inter... | 12/14/1976 |
| 3992095 | Optics module for borehole stress measuring instrument An optics module for use in a holographic borehole instrument which is operable to determine the stress in the wall of a borehole by recording successively on the same holographic recording medium two holograms of a selected surface region of the wall and... | 11/16/1976 |
| 3982835 | Interferometric system To facilitate visual and/or electronic determination of the shape of a light-reflecting test object, a source of coherent light such as a laser produces an illuminating beam and a reference beam, the latter beam being combined in an optical system with re... | 09/28/1976 |
| 3960448 | Holographic instrument for measuring stress in a borehole wall An instrument for determining the stress in the wall of a borehole by recording successively on the same holographic recording medium two holograms of a selected surface region of the wall, and, in the interval between the two recordings, forming a stress... | 06/01/1976 |
