Sterile endoscope sheath

1. An arrangement for sterile handling of a non-sterile endoscope in a sterile environment, comprising: a sterile endoscope sheath having an optical element arranged at a distal end of the endoscope sheath wherein the optical element has one of a light-reflecting element or a light-reflecting area which reflects detection light emitted from a detection light source as reflection light toward a proximal end of the sterile endoscope sheath, and a non-sterile endoscope comprising an endoscope shaft, an illumination optical system for guiding illumination light and an observation optical system for one of detecting or forwarding ambient light entering a distal end of the endoscope shaft, wherein the non-sterile endoscope is received in the endoscope sheath and is shielded by it in a sterile manner against the environment, wherein the non-sterile endoscope has a detection optical system for guiding the detection light emitted by the detection light source, which the detection optical system is different from the illumination optical system and the observation optical system, wherein the non-sterile endoscope has a beam splitter which couples the detection light into the detection optical system, and wherein the beam splitter couples the reflection light out of the detection optical system so that it is incident on a sensor element, wherein the sensor element is one of a photodetector or a CCD sensor.

2. The arrangement according to claim 1 , wherein the one of the light-reflecting element or the light-reflecting area is transparent in at least one optical wavelength range outside a wavelength range of the detection light.

3. The arrangement according to claim 1 , wherein the one of the light-reflecting element or the light-reflecting area reflects light in an ultraviolet (UV), an infrared (IR) or a near-infrared (NIR) wavelength range.

4. The arrangement according to claim 1 , wherein the one of the light-reflecting element or the light-reflecting area is arranged on a side of the optical element facing the proximal end of the endoscope sheath.

5. The arrangement according to claim 1 , wherein the observation optical system guides the reflection light.

6. The arrangement according to claim 1 , wherein the detection light source emits the illumination light and the detection light is coupled to the illumination light.

7. The arrangement according to claim 1 , wherein the detection light source emits detection light in an ultraviolet, infrared, or near-infrared wavelength range.

8. The arrangement according to claim 1 , wherein the detection light source emits coherent detection light.