Invention Application
- Patent Title: METHOD FOR MEASURING THE PROPAGATION TIME OF LIGHT
- Patent Title (中): 用于测量光的传播时间的方法
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Application No.: US12162120Application Date: 2007-01-19
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Publication No.: US20120176596A1Publication Date: 2012-07-12
- Inventor: Gerd Reime , Peter Langer , Bernd Mayer
- Applicant: Gerd Reime , Peter Langer , Bernd Mayer
- Priority: DE10-2006-003-269.1 20060124
- International Application: PCT/EP07/00454 WO 20070119
- Main IPC: G01C3/08
- IPC: G01C3/08

Abstract:
In a method for measuring the transmit time of light, in particular for cameras, a first light signal which is clocked by a first clock controller (16) is input into a light system (14) by a light transmitter (12) and is reflected back to a receiver photodiode (13) by means of a reflective objective (O). The photodiode (13) determines a reception signal as a result of the first light signal. By virtue of the fact that a further light signal which is clocked by a further clock controller (17) is input into the photodiode (13) at an angle with respect to the first light signal and is mixed at the photodiode (13) with the first light signal to form a common reception signal (S13), that the common reception signal (S13) is filtered with a filter (25) whose frequency response corresponds to the frequency of the clock difference in order to form a filter signal, in that the clock signal of the first clock controller (16) and of the further clock controller (17) are also mixed in a mixer (30) in order to form a mixed signal and in that the phase shift between the mixed signal of the clock controllers (16, 17) and the filter signal is used to determine the transit time of light, a method for measuring the transit time of light is provided which can operate in particular with cameras even with relatively inexpensive components and relatively low-frequency amplifiers.
Public/Granted literature
- US08643827B2 Method for measuring the propagation time of light Public/Granted day:2014-02-04
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