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| Number | Title | Issue Date |
| 4045804 | Focus detecting device A focusing device for providing an indication of the in-focus condition of a lens relative to a scene and a focal plane, F0. An a.c. bridge circuit includes photoelectric elements in two legs thereof; the elements being physically positioned ju... | 08/30/1977 |
| 4041505 | Automatic electronic rangefinder An automatic focusing system is provided to process amplitude and phase signals of image motion in an image plane. The camera includes a focusable objective lens, optical means, oscillating means, sensing means, and a servo. Light rays reflected from an o... | 08/09/1977 |
| 4032801 | Electromagnetic radiation intensity comparator apparatus An electromagnetic radiation intensity comparator is disclosed for providing an indication of differences between electromagnetic radiation intensities occurring at different photodetectors.... | 06/28/1977 |
| 4032934 | Automatic focusing system This invention relates to photographic apparatus having means for automatically moving a lens along an axis for properly focusing on an object. The apparatus includes a light emitter for transmitting a train of light signals toward the object at a constan... | 06/28/1977 |
| 4031383 | Method for detecting visibility of image of an object and a device therefor The present invention relates to a method and a device for detecting visibility of the image of an object for adjusting the focus of an optical system. The invention is especially suitable to an optical instrument such as camera, using photo-electric conv... | 06/21/1977 |
| 4018520 | Projector focusing mechanism The present invention is directed to a transparency projector, such as a slide or motion picture projector including a compact focusing mechanism having an objective lens carried within a lens barrel supported within a sleeve which is carried within the p... | 04/19/1977 |
| 4013339 | Optical image stabilizing system In an optical instrument such as a camera or a telescope, a first optical component is mounted to a housing and an inertially stabilized second optical component for compensation is mounted on gimbals. The gimbals are provided with an electric motor which... | 03/22/1977 |
| 4010479 | Focusing apparatus for optical systems Focusing apparatus for use in optical systems, such as photographing cameras, is disclosed. The focusing apparatus of the invention comprises an electronic system for developing, through either a single or two separate channels, pulse trains, the number o... | 03/01/1977 |
| 3999192 | Focus detecting system In the system disclosed, a cylindrical lens or mirror compresses the image of an object illuminated by a beam, and a movable mirror coupled to the lens barrel of a lens system reflects the compressed image onto the dividing line between two photosensors. ... | 12/21/1976 |
| 3972607 | Analog/digital control arrangement for photographic apparatus A bridge circuit which includes a photoelectric transducer furnishes input signals to a differential amplifier whose analog output signal varies in correspondence to the bridge unbalance. A first and second bistable threshold circuit changes the analog ou... | 08/03/1976 |
| 3972056 | Varifocal lens assembly A varifocal lens assembly of a type including at least two lens groups, a first lens group being axially movable parallel to the optical axis of the varifocal lens assembly for varying the focal length of the optical system of the varifocal lens assembly.... | 07/27/1976 |
| 3966315 | Lens focusing means for slide projectors Means to manually or power focus the adjustable lens unit of the projector. The power adjustment can be made irrespective of the position of the adjustable lens unit and safety features are incorporated which prevent locking and possible damage to the adj... | 06/29/1976 |
| 3953863 | Method and apparatus for focusing an objective In a method for focusing a reproducing objective, such as may be used for measuring distances, wherein multiplication of the image of the entrance pupil is achieved by image-splitting optical elements mounted in the plane of the object image, the improvem... | 04/27/1976 |
| 3940777 | Casing of a mechanical mounting for the interchangeable lenses and a camera system using the same A stationary casing of a mechanical mounting for interchangeable lenses which are to be used with a motion picture or still camera is provided with first connecting terminals for electric connection arranged in a space within a coupling adapted to mate wi... | 02/24/1976 |
