Smart apd array readout device and method

Abstract

The invention discloses an intelligent APD array readout system device, which includes an input module A, a power conversion module B, a DC conversion module C, an APD array, an intelligent control module D, and a readout system E; The input is rectified and filtered; the power conversion module B is used to convert the rectified and filtered voltage of the mains into a stable multi-channel DC voltage (positive and negative voltage); the DC conversion module C is used to further convert the DC voltage output by the power conversion module B In order to read out the more accurate DC voltage required by the system; the DC conversion module C supplies power to the intelligent control module D and the readout system E. The invention also discloses an intelligent correction method for APD array imaging, which includes three steps of standard image acquisition, image comparison and automatic correction. The invention has high precision, small size and intelligence.

Description

Technical field [0001] The invention relates to an APD array read-out system and method, in particular to a high-precision, small-size, intelligent APD array read-out device and method. Background technique [0002] There are many current technologies for APD array readout systems. The standard process scheme is power supply system→photosensitive→photoelectric conversion→integral amplification CTIA→sample and hold S / H→output buffer→multiplex transmission→monitoring system imaging. This scheme is suitable for single-photon imaging system. Among them, such as figure 1 The shown scheme has the advantages of simple single circuit, lower cost, and adjustable output; the disadvantages are: a, first need a high-voltage to low-voltage converter; b, the voltage doubler circuit has weak load capacity, slow response speed, and low bandwidth ; C, one-way voltage supply; d, each APD device needs one such circuit, if it is made into an APD array, the system will be very complicated and huge. ...

AI Technical Summary

Problems solved by technology

Among them, such as figure 1 The scheme shown has the advantages of simple single circuit, low cost, and adjustable output; the disadvantages are: a, a converter from high voltage to low voltage is first required; b, the voltage doubler circuit has weak load capacity, slow response speed, and low bandwidth ; c, unidirectional voltage power supply; d, each APD device needs one circuit, if it is made into an APD array, the system will be very complicated and huge

There is also a local scheme such as figure 2 As shown, the advantage is that the forward bias voltage is easy to obtain, and the disadvantages are: a, the output of the op amp is negative voltage, and additional bias is required; b, no compensation correction, each APD needs a set of this circuit, including the bias voltage, and the system also needs very large

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