摘要:
Method and apparatus to measure the quantity of sebum secreted by the skin, by passing light through the specimen. The light passed through the specimen is modulated at a predetermined frequency, and only light of the same modulated frequency is measured by a receiver. The apparatus includes automatic zero calibration, and several embodiments of stabilized phototransistor circuits.
摘要:
Young's modulus and/or the internal damping factor of an elastic material is obtained by subjecting an area of the material to a sustained vibration. The presence of the material being tested changes the resonance of a mechanical resonator and determination of the changed resonance peak enables the required elastic characteristics to be obtained. The sample may be subjected to varying tension during testing and can conveniently be vibrated by signals obtained from a variable frequency generator although, preferably, an electronic circuit for vibrating the resonator has a feed-back loop to operate as an electro-mechanical auto-oscillator.
摘要:
Method and apparatus to measure the quantity of sebum secreted by the skin, by passing light through the specimen. The light passed through the specimen is modulated at a predetermined frequency, and only light of the same modulated frequency is measured by a receiver. The apparatus includes automatic zero calibration, and several embodiments of stabilized phototransistor circuits.
摘要:
An apparatus for measuring mechanical characteristics of a material capable of transmitting vibration, particularly skin of a living subject. An impulse from a generator such as a small hammer causes a disturbance to propagate a wave along the material. A receiver includes a source of radiation and two photocells spaced apart and isolated from each other. The photocells receive the radiation after reflection from spaced locations on the surface of the material. The travel time of the propagated wave between the two reflection points is measured to determine the speed of wave propagation in the material.
摘要:
An apparatus for measuring the consistency or hardness of a material, for example skin tissue on a living body, comprises a support to be applied against the material to be tested and a feeler movably carried by the support for displacement through a distance which will be proportional to the hardness or consistency being measured. To avoid the need for careful positioning of the device on the test material with a carefully constant bearing pressure, a control circuit is provided for recording the displacement of the feeler only when the bearing pressure of the support on the test material has a predetermined value. The reading of the displacement is held and is preferably digital. Application of the support successively to different points on the test material will enable a true comparison of the readings at the various points.
摘要:
The present invention relates to a method of observing biological tissue, the method comprising: collecting through a first end of a bundle of optical fibers light from a surface of the tissue; observing at least one image of the tissue at a second end of the bundle, while injecting light into the second end of the bundle to illuminate the surface of the tissue.
摘要:
The invention relates to a method of generating a synthesized image of a hair, comprising the following steps: calculating the shape of the hair by applying a behavioral relationship determining the shape of the hair as a function of a physical parameter linked to a mechanical property of the hair, in particular the linear density; producing an image of the hair of shape that has been calculated in this way. The behavioral relationship may be given by the minimization of the following function: E = K L ∫ 0 1 [ 1 2 ( k ~ ( s ~ ) - α ) 2 + 1 β z ~ ( s ~ ) ] ⅆ s ~ , where α=Lk0 and β=K/gμL3, and where L designates the length of the hair, k0 its spontaneous curvature, K its bending moment, μ its linear density and g the acceleration due to gravity, {tilde over (s)} the curvilinear abscissa relative to the length of the hair, {tilde over (k)} its local curvature relative to its length and {tilde over (z)} its height relative to its length.
摘要:
A device for evaluating the creasing of the skin in vivo. A zone of the skin to be examined is creased. The zone of the creased skin is scanned with an incident luminous beam which is emitted by a light source. The light reflected by the creased skin is detected. The detected light is converted into an electrical signal. At least one parameter representing the profile of the creased skin is extracted from the electrical signal. This device makes it possible to evaluate the mechanical properties of the dermis, such as its elasticity and firmness and the aging of the skin, as well as to evaluate the effectiveness of products intended to counteract such aging.
摘要:
A confocal microscope equipped with a light source, a rotary disk having holes, a highly sensitive image receiver or camera, an immersion lens, and a contact endpiece for contacting the skin and in which is engaged at least a lower part of the lens. The endpiece includes a central opening and abuts the skin about the central opening. The microscope allows for relative axial displacement of the contact endpiece relative to the lens.
摘要:
Cosmetic or pharmaceutical compositions comprising compounds of formula (I) and the corresponding salts thereof: wherein: —R1 is a radical chosen from —COOR′, —CONR′R″, —CH2OR′, —COR′, —CH2R′, —SO2OR′, —PO3R′R″ and —NHR′, wherein R′ and R″, which may be identical or different, are defined herein; —R2 is chosen from saturated and unsaturated, linear, branched and cyclic hydrocarbon radicals comprising from 1 to 18 carbon atoms which are optionally substituted by from 1 to 5 identical or different entities chosen from —OR′″, —OCOR′″, —SR′″, —SCOR′″, NR′″R″″, —NHCOR′″, halogen, —CN, —COOR′″ and —COR′″, wherein R′″ and R″″, which may be identical or different, are defined herein; as well as the use of these compounds, for example, to promote skin desquamation, to stimulate epidermal renewal and/or to combat the signs of skin ageing.
摘要翻译:包含式(I)化合物及其相应盐的化妆品或药物组合物:其中:-R1是选自-COOR',-CONR'R“,-CHOOR', - COR', - CH 2 R', - SO 2 OR ',-PO 3 R'R“和-NHR',其中R'和R”可以相同或不同,在本文中定义; -R2选自包含1至18个碳原子的饱和和不饱和,直链,支链和环状烃基,其任选被1至5个相同或不同的选自-OR',-OCOR'“,-SR '“,-SCOR'”,NR“R”“,-NHCOR'”,卤素,-CN,-COOR'和-COR'“,其中R'”和R“”可以相同或不同 ,在本文中定义; 以及这些化合物的使用,例如,促进皮肤脱屑,刺激表皮更新和/或抵抗皮肤老化的迹象。