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4185192 |
Alignment system using two photocells directed at each other
A passive optical switching apparatus for use with a sales display device, or with a secret security device or with a safety device. The apparatus includes two photo resistor systems which are...
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4183664 |
Optical apparatus
Various embodiments of optical apparatus incorporating a foraminous plate to define a field of view are disclosed. In a first embodiment, the foramina in a foraminous plate are cylindrical with the...
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4167330 |
Velocity measuring system
The relative transverse velocity between a local station and a zone of reference or observation is measured by providing first and second directional radiation receiving devices at the local...
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4009960 |
Passive optical rangefinder
The present invention provides within a ship, a passive electro-optic dev for providing a measurement of the range, together with a positively identifiable image of an approaching ship or object...
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3993407 |
Polysensory mobility aid
A polysensory mobility aid comprising first and second signal generating means which produce audio frequency signals, respectively, these signals being coupled to two electrically operable...
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3937951 |
All-sky photoelectric lightning detector apparatus
A pair of position sensing photodiodes of a conventional quadrature or duaxis type are deployed face-upwardly at a predetermined distance one from the other. A vertically pointing fisheye lens...
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3907434 |
Binaural sight system
The invention relates to a sight system for producing binaural sound representative of the location of a visible object with respect to a listener. It includes means for generating first and second...
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3803595 |
SYSTEM OF DEVICES FOR POLLUTION DISCOVERY
A novel system of monochromatic devices for use within the Earth's atmosphere comprising an emission exciter and an emission detector for the discovery, identification and location of organic...
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3706493 |
RANGING AND AIMING SYSTEM
A ranging and aiming system for determining the position of a source which emits continuous or noncontinuous forms of radiation. At least two optical systems whose axes are separated by a known...
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3581089 |
CATADIOPTRIC REFLEX RADIATION DETECTION CONVERSION, LOCATION AND DISPLAY DEVICE
A system for detecting and locating short duration radiant energy pulses urring in the nonvisible portions of the spectrum by converting each event of pulsed energy within a region of an observer's...
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3471235 |
AUTOMATIC OPTICAL RANGE FINDER
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3052754 |
Electro-optical range finders
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3032660 |
Range finder and tracking device
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2972924 |
Optical comparator and range finder
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2786096 |
Television range finder
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