Abstract: The invention relates to a device useful for non-invasive detection of the properties of a medium by means of interferometry. The device comprises an optical source which is used for illuminating a zone of the medium that is to be probed with a light beam, and an interferometer for splitting the light beam into a reference beam and a probe beam. The interferometer has a cutoff frequency for the automatic control of respective path lengths of the reference beam and of the probe beam. The device also comprises scanning means which, together with the probe beam, are used to scan the zone to be probed at an image acquisition frequency greater than the cutoff frequency.

Abstract: A replacement device for a light bulb includes a translucent shell and a base. The base supports a plurality of LEDs positioned so as to emit a light show through the shell. The base is configured to be received in a conventional light socket. The base also includes a compartment for receiving and securing a replaceable volatile active cartridge and a heater for enabling the device to effectively emit an active ingredient from the cartridge when the cartridge is secured in the compartment. A white light source is also provided in the shell as a source of illumination. The device can be used as a white light source, for displaying a colored light show and for volatile active emission. The volatile active may be emitted continuously when the device is used as either a white light source or for purposes of displaying a colored light show. Thus, a single device is used as a replacement for a conventional light bulb and is a combination white light source/colored light show source/volatile active source.

Abstract: An apparatus for dispensing a plurality of powders, such as colorants for paint, caulking or grout or components of cosmetics, comprising a plurality of containers for holding the powders, a plurality of metering powder pumps, connected to a container or having a connector for releasably connecting a container to the respective powder pump, wherein the capacity of the metering powder pump is selectable.