Abstract: An optical device for generating images with a three-dimensional effect is disclosed. The device can include a first observation channel, a second observation channel that can be present simultaneously, or alternated in intervals, with the first observation channel. The device can also include a first diaphragm arranged in the first observation channel and having a first aperture. The first aperture can include a first semimajor axis, a first semiminor axis perpendicular to the first semimajor axis such that an extension of the first aperture in a direction of the first semimajor axis is greater than an extension of the first aperture in a direction of the first semiminor axis. Further, the device can include a second diaphragm arranged in the second observation channel and having a second aperture, that can have a second semimajor axis and a second semiminor axis.

Abstract: An optical device for generating images with a three-dimensional effect is disclosed. The device can include a first observation channel, a second observation channel that can be present simultaneously, or alternated in intervals, with the first observation channel. The device can also include a first diaphragm arranged in the first observation channel and having a first aperture. The first aperture can include a first semimajor axis, a first semiminor axis perpendicular to the first semimajor axis such that an extension of the first aperture in a direction of the first semimajor axis is greater than an extension of the first aperture in a direction of the first semiminor axis. Further, the device can include a second diaphragm arranged in the second observation channel and having a second aperture, that can have a second semimajor axis and a second semiminor axis.

Abstract: An arrangement is described in which an endoscope 3 inserted into the pharynx of the patient B is used to visually examine the vibrations of the vocal cords 2, while using light that contains little or no infrared light. At the same time, an oscillogram of the vibrations of the vocal cords is plotted, showing the sequence of motion of the vocal cords. The latter purpose is served by an emitter 1, which is attached to the throat of the patient B below the vocal cords 2 and which produces light in the near infrared range (NIR). Using a mirror 5 that reflects infrared light, the light modulated by the vibration of vocal cords is coupled out and fed to a sensor 6, which, together with an evaluating unit 9, detects and evaluates the vocal cord signals.

Abstract: An LED arrangement (10, 20) has a luminescence-conversion layer (3, 23) which is positioned on an LED chip (2, 22) and onto which at least a portion of the light reflected by a reflector (6, 27) is guided in such a way that an image of the LED chip is mapped or copied onto the LED chip. A process for operating a LED arrangement is implemented by: producing light by means of a LED chip; reflecting a portion of the light produced by the LED chip; and coupling the light into an optical system which has an acceptance requirement, while only light that fulfills the acceptance requirement can be coupled into the optical system and the light is reflected onto a luminescence-conversion layer in such a way that an image of the LED chip is mapped onto the LED chip.

Abstract: An arrangement is described in which an endoscope 3 inserted into the pharynx of the patient B is used to visually examine the vibrations of the vocal cords 2, while using light that contains little or no infrared light. At the same time, an oscillogram of the vibrations of the vocal cords is plotted, showing the sequence of motion of the vocal cords. The latter purpose is served by an emitter 1, which is attached to the throat of the patient B below the vocal cords 2 and which produces light in the near infrared range (NIR). Using a mirror 5 that reflects infrared light, the light modulated by the vibration of vocal cords is coupled out and fed to a sensor 6, which, together with an evaluating unit 9, detects and evaluates the vocal cord signals.