Patent ID: 8823786

Claim:
A method for testing an optical investigation system, the method comprising the steps of: providing a light source configured to generate illuminating light at least either with a first predetermined illumination spectrum or with a second predetermined illumination spectrum; providing an imaging device for optical investigation of an object in remitted light and fluorescent light, the imaging device having a proximal end and a distal end and having an observation beam path that comprises at least either a first predetermined transmission spectrum or a second predetermined transmission spectrum; providing an artificial test apparatus, the test apparatus comprising a light-insulated housing having an aperture at one end and being closed at the other end and including a hollow space within the light-insulated housing, the test apparatus having a reference body at the closed end of the test apparatus, the reference body including a reference surface, the reference surface having a reference area and an indicator area on the reference area, wherein the indicator area has a wavelength-dependent optical property that changes between a first focal point of the first predetermined illumination spectrum of the light source and the first predetermined transmission spectrum of the imaging device, and a second focal point of the second predetermined illumination spectrum of the light source and the second predetermined transmission spectrum of the imaging device; positioning the distal end of the imaging device through the aperture and into the hollow space of the test apparatus by using a positioning device, the positioning device holding the imaging device by form-locking or force-fitting, in such a way that the distal end of the imaging device is positioned in a predetermined position and in a predetermined direction in the hollow space; illuminating the reference surface with illuminating light from the light source; recording an image of the reference surface by means of the imaging device; and determining which illumination spectrum and which transmission spectrum was present in the observation beam path on recording the image, on the basis of the recorded image.