Abstract: This disclosure relates to a surgical lighting device for generating a spot of light on a surgical site for use in combination with a fluorescence imaging device. The lighting device comprises a support structure, a subsurface which may be coupled to the support structure to seal the lower surface of the device while allowing light to pass through and a plurality of light sources emitting white light and placed between the support structure and the subsurface. The device further includes a plurality of NIR (near infrared) filters, each NIR filter being associated with a light source and being configured to substantially prevent the transmission of wavelengths within a wavelength band from 680 nm to 900 nm, while minimizing the change in the color temperature of the light spot.

Abstract: This disclosure relates to a surgical lighting device comprising a shell (12), a plurality of light sources (24) coupled to the shell, and a closure plate (18) for closing the lighting device by allowing light to pass through. The closure plate comprises a plurality of lens elements, each lens element being configured to collect and focus light from a corresponding light source to generate a light spot of a predetermined diameter located at a predetermined distance from the lighting device. In order to simplify the structure of the lighting device, the light sources and the cover plate are arranged in such a way that the light beams coming from the light sources and received by the associated lens elements arrive at the lens elements without substantial reflection or deflection. The closure plate therefore comprises all the optics necessary for collecting and focusing the light from the light sources.

Abstract: This disclosure relates to a surgical lighting device for generating a spot of light on a surgical site for use in combination with a fluorescence imaging device. The lighting device comprises a support structure, a subsurface which may be coupled to the support structure to seal the lower surface of the device while allowing light to pass through and a plurality of light sources emitting white light and placed between the support structure and the subsurface. The device further includes a plurality of NIR (near infrared) filters, each NIR filter being associated with a light source and being configured to substantially prevent the transmission of wavelengths within a wavelength band from 680 nm to 900 nm, while minimizing the change in the color temperature of the light spot.

Abstract: A lighting device comprises a solid optical collimator (6?), the collimator comprises a truncated cap having an inside surface (10?) operating in total internal reflection and having a small base opening into a frustoconical through recess that is coaxial with the cap and at the centre of which a light source (8?) is placed, and having a refractive large base such that incident light emitted by the light source is guided in totality by the inside surface towards the large base of the cap. The recess of the collimator is disposed in the cap in such a manner as to have a small base open and coinciding with the small base of the cap.

Abstract: A lighting device for illuminating an operative field comprises, in an axial lighting dome, a first ring of LEDs at a first color temperature, and a second ring of LEDs at a second color temperature different from said first color temperature, and an annular facetted mirror having semi-reflective facets and arranged about the same axis as said rings of LEDs. Collimation optical systems are provided between each ring of LEDs and the annular facetted mirror having semi-reflective facets. The annular facetted mirror having semi-reflective facets mixes the collimated light beams emitted by the two rings of LEDs coupled to the collimators, and forms first and second collimated resulting mixed light beams having the same intermediate color temperature.

Abstract: A lighting device comprises a solid optical collimator (6?), the collimator comprises a truncated cap having an inside surface (10?) operating in total internal reflection and having a small base opening into a frustoconical through recess that is coaxial with the cap and at the centre of which a light source (8?) is placed, and having a refractive large base such that incident light emitted by the light source is guided in totality by the inside surface towards the large base of the cap. The recess of the collimator is disposed in the cap in such a manner as to have a small base open and coinciding with the small base of the cap.

Abstract: A lighting device for illuminating an operative field comprises, in an axial lighting dome, a first ring of LEDs at a first color temperature, and a second ring of LEDs at a second color temperature different from said first color temperature, and an annular facetted mirror having semi-reflective facets and arranged about the same axis as said rings of LEDs. Collimation optical systems are provided between each ring of LEDs and the annular facetted mirror having semi-reflective facets. The annular facetted mirror having semi-reflective facets mixes the collimated light beams emitted by the two rings of LEDs coupled to the collimators, and forms first and second collimated resulting mixed light beams having the same intermediate color temperature.

Abstract: A lighting device comprises a first light source (10) at a first color temperature (Tk1), a second light source (20) at a second color temperature (Tk2) that is different from the first color temperature, and an optical system that forms an illumination spot (3) at an intermediate color temperature (Tkr). The optical system comprises a beam splitter (13) that is arranged to split the light produced by each light source (10, 20) into a transmitted light beam and a reflected light beam. It is arranged to focus said transmitted and reflective light beams (FR1, FR2) and to combine them in a certain superposition configuration in a superposition plane in which said illumination spot is formed, and the optical system and the light sources are arranged to modify the size of the illumination spot (3) at said intermediate temperature.

Abstract: A lighting device comprises a first light source (10) at a first color temperature (Tk1), a second light source (20) at a second color temperature (Tk2) that is different from the first color temperature, and an optical system that forms an illumination spot (3) at an intermediate color temperature (Tkr). The optical system comprises a beam splitter (13) that is arranged to split the light produced by each light source (10, 20) into a transmitted light beam and a reflected light beam. It is arranged to focus said transmitted and reflective light beams (FR1, FR2) and to combine them in a certain superposition configuration in a superposition plane in which said illumination spot is formed, and the optical system and the light sources are arranged to modify the size of the illumination spot (3) at said intermediate temperature.