Visión Nocturna y MTF

• Autores: Sergio Ortiz Egea
• Localización: Boletín de observación tecnológica en defensa, ISSN-e 2444-4839, ISSN 2444-4847, Nº. 27 (segundo trimestre), 2010, págs. 19-20
• Idioma: español
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• Resumen

  • The human eye is an extremely versatile optical instrument that can adapt itself to many different situations. During night-time conditions however, only 1% of photons that the retina picks up become signals in which only objects of high contrast can be detected. To improve night-time vision in humans Image enhancement, active imaging or thermal imaging are some of the options available. This article will focus on image intensification as a way to overcome the limitations of human vision during night-time conditions. Test centres have been developed in CIDA labs to help assess the performance of night vision systems such as the characteristic parameters of the intensifier tubes. One of the most important outcomes of the tests is the MTF (Modulation Transfer Function). The MTF quantifies the loss of benefits of an electronic or optical system based on the space frequency, which is why it can be used as a quality measurement tool of a system.