Koninklijke Philips Corporation N.V.

Gerald Lucassen

Michael Cornelis Van Beek

Marjolein Van Der Voort

Wouter Harry Jacinth Rensen

Rieko Verhagen

Antonius Maarten Nuijs

Paul Anton Josef Ackermans

Bernardus Leonardus Gerardus Bakker

Michiel Errit Roersma

Guido Roosen

Wouter Harry Rensen

Bernardus Leonardus Bakker

Hendrikus Antonius Cornelus Maria Compen

Durk Jolmer De Vries

Jan Van Herk

The present invention discloses a device and a method for controlling growth of hair on human skin with low doses of electromagnetic radiation, and a device for carrying out the method. In the method, radiation of a suitable spectrum is applied to the skin, in one or more pulses of between 1 and 100 ms, and with maximum fluencies on the skin between 1 and 12 J/cm2. By applying such low fluencies and at controlled pulse durations, follicles of the hairs are induced to the catagen phase. This means that the growth of the hairs of those follicles will stop. Although the method is not primarily aimed at immediate hair removal, hairs may be shed subsequently. In any case, further growth may be stopped for prolonged periods of time. The main advantage of the method is that the risk of damage to the skin is minimized.

Device and method for low intensity optical hair growth control

A measurement head has an objective for imaging of a target area such as including a capillary vessel in the skin. The measurement head does not require a lateral shifting of the optical axis of the objective. Transverse relative movements between the objective and a capillary vessel in the skin are performed by mechanically shifting the skin with respect to the objective of the measurement head. Moreover, the measurement head is adapted to host one or more pressure sensors for measuring the contact pressure between the measurement head and the skin. Pressure information may be exploited in order to calibrate a spectroscopic analyzer, and/or to regulate the contact pressure within predefined margins specifying an optimum range of contact pressure for spectroscopic examination of capillary vessels.

Measurement head for non-invasive blood analysis

An autofocus mechanism for a spectroscopic system determines a time varying optical property of a volume of interest. The mechanism measures the fluctuations of the optical property of the volume of interest for determining the position of the volume of interest. The spectroscopic system focuses an excitation beam into the determined volume of interest and collects return radiation emanating from the volume of interest for spectroscopic analysis. Preferably, inelastically scattered radiation of an excitation beam is separated from elastically scattered radiation for spectroscopic analysis. The elastically scattered radiation of the excitation beam is measured for fluctuations of the optical property of the volume of interest. A control loop maximizes the amplitude and/or intensity of the fluctuations and specifies the position of a volume of interest e.g. the center of a capillary vessel.

Autofocus mechanism for spectroscopic system

A spectroscopic system which determines a property of a biological structure in a volume of interest of a person includes a low cost objective lens for directing an excitation beam into a volume of interest and for collecting return radiation from the volume of interest. After detection of the return radiation and generation of spectroscopic signals, a correction unit performs a compensation for aberrations of the spectroscopic signals introduced by the low cost objective lens. Since the aberrations of the objective lens strongly depend on the lateral distance of the volume of interest from the optical axis of the objective lens, the correction unit uses a correction table providing an assignment between correction values and various lateral positions of the volume of interest.

Aberration correction for spectroscopic analysis

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Eindhoven, Netherlands

Gerald Lucassen