Portable device for the detection of autofluorescence of an animal biological tissue that emits a fluorescent component at a wavelength of approximately 515 nm when illuminated by a light source at a wavelength between 200 and 1,100 nm, which comprises less a component at approximately 450 nm, said device comprising an optical filter system of the bandpass type, such that it isolates the light around said fluorescent component and excludes the components in the visible and UV, said filter system being placed optical in a spectacle frame or in a viewfinder and comprising three nanometric controlled lenses superimposed on optical glass having the following characteristics: - a bandpass filter having a transmittance curve, such as a Schott® BG39, which has a peak at approximately 500 nm and a bandwidth between approximately 300 and 700 nm； - a high pass filter having a transmittance curve, such as a Schott® GG495, which has a plateau above about 540 nm and substantially no transmittance below about 480 nm； - a bandpass filter having a transmittance curve, such as a Schott® BG23, which has a peak at approximately 465 nm and a bandwidth between approximately 300 and 600 nm.Dispositivo portátil para la detección de autofluorescencia de un tejido biológico animal que emite un componente fluorescente a una longitud de onda de aproximadamente 515 nm cuando es iluminado por una fuente de luz a una longitud de onda comprendida entre 200 y 1.100 nm, que comprende por lo menos un componente a aproximadamente 450 nm, comprendiendo dicho dispositivo un sistema de filtro óptico del tipo paso de banda, de manera que aísla la luz alrededor de dicho componente fluorescente y excluye los componentes en el visible y el UV, estando colocado dicho sistema de filtro óptico en una montura para gafas o en un visor y que comprende tres lentes controladas nanométricamente superpuestas en vidrio óptico que presentan las características siguientes: - un filtro de paso de banda que presenta una c
