Laser light receiving device with improved noise discrimination
First Claim
1. A laser signal receiving apparatus for receiving light pulses transmitted from a laser transmitter, said apparatus comprising:
- a light receiving section having a photo-electric converter for converting said light pulses into an electric pulse signal comprising a series of electric pulses;
a pulse-width detecting section for detecting a pulse-width of said series of electric pulses derived from said light receiving section; and
a controlling section, including (i) a counter terminal receiving said series of electric pulses, and (ii) a pulse-width detector terminal receiving an output of said pulse-width detecting section, for counting said electric pulses having a predetermined pulse-width on the basis of said output of said pulse-width detecting section.
1 Assignment
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Accused Products
Abstract
For accurately detecting a desired laser signal without being affected by ambient noise light pulse, a laser signal receiving apparatus, which receives a light pulse transmitted from a laser transmitter, includes a light receiving section having a photo-electric converter for converting a light pulse into an electric pulse signal, a pulse-width detecting section for detecting a pulse-width of the pulse signal derived from the light receiving section and a controlling section having a counter port supplied with the pulse signal and a pulse-width detector port supplied with an output of the pulse-width detecting section, so as to count only the pulse signal having a predetermined pulse-width, based on an output of the pulse-width detecting section.
18 Citations
10 Claims
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1. A laser signal receiving apparatus for receiving light pulses transmitted from a laser transmitter, said apparatus comprising:
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a light receiving section having a photo-electric converter for converting said light pulses into an electric pulse signal comprising a series of electric pulses; a pulse-width detecting section for detecting a pulse-width of said series of electric pulses derived from said light receiving section; and a controlling section, including (i) a counter terminal receiving said series of electric pulses, and (ii) a pulse-width detector terminal receiving an output of said pulse-width detecting section, for counting said electric pulses having a predetermined pulse-width on the basis of said output of said pulse-width detecting section. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A laser signal receiving apparatus for receiving successive light pulses, said apparatus comprising:
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a light receiving section having a photo-electric converter to convert said light pulses into successive electric pulse signals corresponding to said light pulses; and a controlling section to (i) detect time lengths between adjacent ones of said electric pulse signals and (ii) process data representing said time lengths to determine a representative time length of said time lengths. - View Dependent Claims (8, 9, 10)
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Specification