INFRARED LOCATOR FOR MEN WITH REDUCED VISION Russian patent published in 2007 - IPC G01S17/02 A61F9/08 

FIELD: the invention refers to arrangements for warning a man with reduced vision about approaching to an obstacle and estimating distance to it.

SUBSTANCE: there are additionally introduced in the infrared locator for men with reduced vision in-series connected a clocked latch and a key, the second infrared radiator and the third focusing lens whose optical axis is oriented in the direction of the obstacle. At that in the rear focal plane of the third lens there is a second infrared radiator located on the base line switched with its input to the output of a frequency devisor, whose input is connected with an information input of the key, whose driving point is connected with the output of the clocked latch, and its output is switched to the information input of a pulse meter whose output is connected with the input of a digital-analog converter. At that the input of the clocked latch is switched to the output of an amplifier-limiter.

EFFECT: increases accuracy of distance measuring.

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