Abstract: The invention relates to a modified microscope-photometer which makes it possible to record and evaluate inherent fluorescent spectra of organic tissue surfaces. The modified microscope-photometer affords the advantage of being able to illuminate the object in a path coaxial to the viewing direction.

Abstract: The invention is directed to an apparatus for making in vivo measurements of eye lens cloudiness such as caused by cataracta nuclearis. The lens of the human eye has an inherent fluorescence which corresponds to the cloudiness. The apparatus of the invention includes a projecting device for projecting a slit image onto the eye lens with a monochromatic excitation beam having a wavelength lying in the range of 350 nm-500 nm. The light beam excites the fluorescence in the eye lens to produce a fluorescence light. A measuring device measures the fluorescence light in the wavelength range of 380 nm to 650 nm. A signal processing unit analyzes the fluorescence spectrum to determine the wavelength corresponding to a maximum intensity of the fluorescence spectrum. The signal processing unit includes a memory having a scale of values for eye lens cloudiness and stores an empirically determined table of values of the measured parameters corresponding to the scale values.

Abstract: A container closed by a lid for receiving and compacting waste paper includes a volume-occupying lid (3, 14) which fits inside the container (1, 13). The container (1, 13) defines a chamber large enough to accomodate individual pieces of waste to be deposited and compacted. The lid (3, 14) is retained in the container-closing position.