Abstract: The invention relates to a device for multichannel analog detection of a signal to be detected having a very good signal/noise ratio. It incorporates a modulator (53) producing a modulated signal S(P); means of synchronous attenuation (54) of variable phase .PHI. producing an attenuated modulated signal; a multipoint receiver (52) receiving the modulated-attenuated signal and producing for each point a primary analog signal; an integrator producing for each point a value V(P,.PHI.) resulting from the integration over N periods of the primary analog signal; means of reading, of digitizing and of storing the values V(P,.PHI.) for a given .PHI. value; a phase sequencer giving .PHI. the values .PHI..sub.0 +i2.pi./n successively where i is an integer varying from 1 to n; a digital processing unit making it possible to obtain data representative of S(P) from the values V(P,.PHI.). It is particularly well adapted to the detection of a luminous flux with an array of photodiodes.

Abstract: The device comprises a high speed oscilloscope on the screen of which is formed by scanning a light path representative of the amplitude variation as a function of the time of the signal to be processed. Each point of such path is transformed by an astigmatic optical system into a light segment of constant length projected with off-set on a strip of photodiodes so that each sensor element of the strip receives a light band of a heigth proportional to the ordinate of the corresponding point of the path. An electronic circuit reads the strip after a predetermined number of passages of the signal. The result is displayed on an oscilloscope and stored in a memory after analog-digital conversion.