Abstract: A device and method for observing an object, in particular a biological object includes a light source able to illuminate a sample. Under the effect of the illumination, the object emits back-scattered radiation that propagates to a screen, the area of which is larger than 100 cm2. The projection of the back-scattered radiation onto the screen forms an image representative of the back-scattered radiation, called a scattergram. An image sensor allows an image representative of the scattergram formed on the screen to be acquired.

Abstract: A method for observing a fluorescent sample, the sample comprising a fluorescent agent that emits fluorescence light, in a fluorescence spectral band, when it is illuminated by excitation light, in an excitation spectral band, the method comprising the following steps: a) placing the sample on a holder; b) illuminating the sample, with an excitation light source, in the excitation spectral band, the light emitted by the light source propagating along a propagation axis; c) detecting fluorescence light, in the fluorescence spectral band, with an image sensor; the method being such that the holder comprises a thin layer formed from a first material, of a first refractive index, the thin layer lying in a holder plane perpendicular to the propagation axis, the thin layer comprising a first photonic crystal and second photonic crystals configured to confine the excitation light and the fluorescence light in the thin layer.

Abstract: A method for observing a fluorescent sample, the sample comprising a fluorescent agent that emits fluorescence light, in a fluorescence spectral band, when it is illuminated by excitation light, in an excitation spectral band, the method comprising the following steps: a) placing the sample on a holder; b) illuminating the sample, with an excitation light source, in the excitation spectral band, the light emitted by the light source propagating along a propagation axis; c) detecting fluorescence light, in the fluorescence spectral band, with an image sensor; the method being such that the holder comprises a thin layer formed from a first material, of a first refractive index, the thin layer lying in a holder plane perpendicular to the propagation axis, the thin layer comprising a first photonic crystal and second photonic crystals configured to confine the excitation light and the fluorescence light in the thin layer.

Abstract: A device for measuring radiation backscattered by a sample including: at least one light source that is configured to emit a light beam, along an axis of incidence, towards a surface of the sample so as to form, on said surface, an elementary illumination zone; an image sensor for forming an image of the radiation backscattered by the sample when the latter is illuminated by the light source, the image sensor lying in a detection plane; a bundle of optical fibres, extending, along an extension axis, between a proximal surface and a distal surface, the proximal surface being applied against the image sensor, the distal surface being configured to be applied against the surface of the sample; wherein the light source is arranged around the bundle of optical fibres, and wherein the distance between the light source and the bundle of optical fibres is less than 1 mm.

Abstract: An object of the invention is an image sensor comprising a matrix of pixels, extending along a detection plane, and configured to form an image of an incident light wave propagating in a spectral band along a propagation axis, the image sensor being characterized in that it comprises a mask, formed by opaque elementary masks, extending parallel to the detection plane, between which there extend openings through which the incident light wave can propagate toward the detection plane, the matrix of pixels being divided into: open pixels extending facing the openings; masked pixels, each masked pixel being defined by a projection of an elementary mask along the axis of propagation on the matrix of pixels, each masked pixel being associated with the elementary mask facing it; the image sensor comprising, between the open pixels and the openings: a waveguide, extending facing masked pixels and open pixels; a first diffraction grating, extending facing at least one open pixel, and configured to couple part of t

Abstract: A device for measuring radiation backscattered by a sample including: at least one light source that is configured to emit a light beam, along an axis of incidence, towards a surface of the sample so as to form, on said surface, an elementary illumination zone; an image sensor for forming an image of the radiation backscattered by the sample when the latter is illuminated by the light source, the image sensor lying in a detection plane; a bundle of optical fibres, extending, along an extension axis, between a proximal surface and a distal surface, the proximal surface being applied against the image sensor, the distal surface being configured to be applied against the surface of the sample; wherein the light source is arranged around the bundle of optical fibres, and wherein the distance between the light source and the bundle of optical fibres is less than 1 mm.

Abstract: An object of the invention is an image sensor comprising a matrix of pixels, extending along a detection plane, and configured to form an image of an incident light wave propagating in a spectral band along a propagation axis, the image sensor being characterized in that it comprises a mask, formed by opaque elementary masks, extending parallel to the detection plane, between which there extend openings through which the incident light wave can propagate toward the detection plane, the matrix of pixels being divided into: open pixels extending facing the openings; masked pixels, each masked pixel being defined by a projection of an elementary mask along the axis of propagation on the matrix of pixels, each masked pixel being associated with the elementary mask facing it; the image sensor comprising, between the open pixels and the openings: a waveguide, extending facing masked pixels and open pixels; a first diffraction grating, extending facing at least one open pixel, and configured to couple part of t