METHOD FOR DETERMINING EFFECTIVE PHOTOSENSITIVE AREA OF ALL PHOTOSENSITIVE ELEMENTS IN AN INFRARED PHOTOSENSITIVE MODULE WITH TIME DELAY AND ACCUMULATION MODE Russian patent published in 2025 - IPC G01R31/26 H02S50/10 

FIELD: measuring.

SUBSTANCE: invention relates to methods for measuring photoelectric characteristics (PEC) of samples of infrared (IR) photosensitive modules (PM) with a time delay and accumulation (TDA) mode. Method of determining the effective photosensitive area of all photosensitive elements (PSE) included in the IR PM with the TDA mode, includes setting a stationary value of temperature of the radiation source and irradiating a test object by means of it, adjustment, including installation of scattering spot in area of photosensitive area of photosensitive element, formation of a series of images of the test object in the area of the photosensitive area of the photosensitive element of the analysed sample of the IR PM by moving the scattering spot along the entire photosensitive area of the photosensitive element in two mutually perpendicular directions, registration of measured one-dimensional arrays of voltages or currents of output signals of IR PM channels by means of personal computer, their processing for calculation of two-dimensional direction-finding characteristic and effective photosensitive area of each photosensitive element. Following components are installed on one optical axis: radiation source, detachable optical modulator, test object condenser, test object node, single-channel collimator lens, precision scanning mirror, projection lens and a cryostat, inside which, opposite to its radiation-transmitting input window, an investigated sample of an infrared photosensitive module with a time delay and accumulation mode is placed, wherein the test object assembly includes a test object with holes for the formation of scattering spots, a test object holder, test object movement unit consisting of a microcontroller and a stepper motor, after which a plurality of scattering spots, the number of which coincides with the number of holes in the test object, is projected onto the plane of the photosensitive layer of the PSE array by means of a test object. Then performing adjustment, forming series of images of holes of test object in zones of photosensitive areas of all PSE, which are part of IR PM, calculating the sensitivity distribution over the photosensitive areas of each PSE using the Richardson-Lucy method – an iterative algorithm for deconvolution of a two-dimensional direction-finding characteristic, after which the effective photosensitive area of all PSE included into the composition of the IR PM with the TDA mode is determined.

EFFECT: invention makes it possible to reduce time expenditures required for determination of effective area of all PSEs included in composition of IR PM with TDA mode irrespective of identity of photosensitive elements.

7 cl, 7 dwg