Very high angular resolution laser beam rider detector having a gated image intensifier and a video camera
US5280167A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 1993 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Jan 13, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4804
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A laser warning receiver (LWR) having an ability to not only detect a low power level laser source, such as a pulse train emitted by a laser beam rider, but to also provide a high angular resolution in determining the angle of arrival of that pulse train. The receiver includes a lens/filter arrangement for a large area photodetector to detect an incoming signal from an emitting source and a high gain amplifier to amplify the signal which is then applied to a synchronization generator that generates a digital pulse train with pulses corresponding to peaks in the incoming signal. The digital pulse train is applied to a code breaker where the code is analyzed and a further code is generated anticipating the arrival of further pulses in order to verify the code. That further code is applied to a time gate generator which generate a code, synchronized with the incoming signal, that controls the high voltage of a gated image intensifier which is coupled to a video camera. Gating of the image intensifier is synchronized, as a result, with coded emissions from the source so that a video image from the camera can be displayed on a monitor and more easily differentiated from the background. …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.