The invention provides a
solar simulator optical
system for testing a triple-junction
gallium arsenide solar cell, and relates to the technical field of
light spectrum, aiming at solving the problems of an existing
solar simulator optical
system that difference is formed between a partial
spectrum band and a
solar light spectrum, so that measurement requirements cannot be met and the like. The
solar simulator optical
system comprises a
xenon lamp, an ellipsoidal reflecting mirror, an
optical filter array, a first plane reflecting mirror, an AM0
optical filter, an optical
integrator, a second plane reflecting mirror and a
collimator objective, and further comprises an
optical filter array; the optical filter array comprises two first optical filters, two second optical filters and two third optical filters; the two first optical filters, the two second optical filters and the two third optical filters are uniformly distributed along the periphery at intervals; light emitted by the
xenon lam is reflected by the ellipsoidal reflecting mirror, and then is filtered through the optical filter array; after the direction of a
light beam is changed through the first plane reflecting mirror, the light is filtered through the AM0 optical filter again, and is converged on the optical
integrator; then the light passes through the optical
integrator, the second plane reflecting mirror and the
collimator objective in sequence and then is projected onto an
irradiation surface, so as to form the uniform
irradiation surface.