摘要:
The invention relates to an optical article, comprising a substrate covered with an abrasion and scratch resistant coating with a lower layer and an upper layer stuck to each other, the upper layer and the lower layer being made of hardened layers of upper and lower layer compositions, the upper layer composition comprising at least one organosilane, or hydrolysate thereof, of formula RnYmSi(X)4-n-m and at least one compound or hydrolysate thereof of formula M(Z)x, the following ratio being less than 2.3 : Rs=mass of the theoretical dry extract of compounds I in the upper layer composition/mass of the theoretical dry extract of compounds II in the upper layer composition. The lower layer composition comprises at least one organosilane, or hydrolysate thereof of formula R'n'Y'm'Si(X')4-n-m' and, optionally at least one compound, or hydrolysate thereof of formula M'(Z')y, the following ratio being greater than 2.3 : Ri = mass of the theoretical dry extract of compounds III in the lower layer composition/mass of the theoretical dry extract of compounds IV in the lower layer composition. In the above formulae, M and M' are metals or metalloids of valence x and y, at least equal to 4, R and R' are monovalent organic groups bonded to silicon by a carbon atom and containing at least one epoxy function, groups X, X', Z and Z' are hydrolysable groups, Y and Y' are monovalent organic groups bonded to silicon by a carbon atom, n, m, n' and m' are whole numbers such that n and n' = 1 or 2 with n+m and n'+m' = 1 or 2.
摘要:
A transparent optical component having cells (1) filled with an optical material is proposed, which has a high transparency. The cells of the component are filled to levels (h 1,...,h 5) which vary randomly, and the variations of which are adapted so as not to cause a perceptible optical defect. To do this, the fill levels of the cells are adapted so that phase shifts undergone by the light rays (R 1,...,R 5) that pass through the cells have a root mean square deviation of less than one quarter of the wavelength (1). Such a component may in particular be an ophthalmic lens.
摘要:
The invention relates to an optical article, comprising a substrate covered with an abrasion and scratch resistant coating with a lower layer and an upper layer stuck to each other, the upper layer and the lower layer being made of hardened layers of upper and lower layer compositions, the upper layer composition comprising at least one organosilane, or hydrolysate thereof, of formula RnYmSi(X)4-n-m and at least one compound or hydrolysate thereof of formula M(Z)x, the following ratio being less than 2.3 : Rs=mass of the theoretical dry extract of compounds I in the upper layer composition/mass of the theoretical dry extract of compounds II in the upper layer composition. The lower layer composition comprises at least one organosilane, or hydrolysate thereof of formula R'n'Y'm'Si(X')4-n-m' and, optionally at least one compound, or hydrolysate thereof of formula M'(Z')y, the following ratio being greater than 2.3 : Ri = mass of the theoretical dry extract of compounds III in the lower layer composition/mass of the theoretical dry extract of compounds IV in the lower layer composition. In the above formulae, M and M' are metals or metalloids of valence x and y, at least equal to 4, R and R' are monovalent organic groups bonded to silicon by a carbon atom and containing at least one epoxy function, groups X, X', Z and Z' are hydrolysable groups, Y and Y' are monovalent organic groups bonded to silicon by a carbon atom, n, m, n' and m' are whole numbers such that n and n' = 1 or 2 with n+m and n'+m' = 1 or 2.
摘要:
A method of controlling a programmable lens device comprising a programmable lens and an optical function controller, the programmable lens having an optical function and extending between at least one eye of the wearer and the real world scene when the device is used by the wearer, and the optical function controller being arranged to control the optical function of the programmable lens, the method comprising: - an optical function data receiving step during which optical function data relating to the optical function of the programmable lens is received by the optical function controller, - an optical function modifying step during which the optical function of the programmable electronic lens device is modified by the optical function controller based on the optical function data.
摘要:
The invention relates to a photochromic optical article with reduced thermal dependency, comprising: (a) a transparent substrate, (b) a saturated photochromic layer having, in the activated state and at a temperature of 20°C, a relative transmission factor of less than 1% in the visible range, and (c) an anti-UV coating of plastic material at least partially covering the saturated photochromic layer, the said anti-UV coating containing at least one agent which absorbs UV radiation (anti-UV agent) and is distributed in a pattern consisting of a multitude of points, each having a surface area of less than 0.15 mm 2, the average distance between two neighbouring points lying between 0.5 and 2 mm and the ratio of the overall surface area of all the points to the total surface area of the anti-UV coating being such that the relative transmission factor of the optical article in the visible range in the activated state and at 20°C is at least equal to 5%. The invention also relates to two methods for manufacturing such an optical article.
摘要:
The invention relates to transparent electrochromic systems (100) which each include one pair of supply electrodes (1, 2) and at least one pair of polarisation electrodes (3, 4). The polarisation electrodes prevent a reaction of mutual neutralisation of the electroactive substances of the systems from causing unnecessary consumption of electric current. Said electrodes also prevent a neutralisation reaction from limiting a lower value of light transmission of the systems. For this purpose, the polarisation electrodes produce an electric field (E) inside the systems, which attracts the electroactive substances that have already reacted with the supply electrodes to different areas.
摘要:
The invention relates to a transparent electrochromic system (100), including a cellular structure (13), two power supply electrodes (1, 2) together supported on a single wall (10), and at least one additional electrode (3). Said additional electrode can be used as a reference electrode or as a polarization electrode. Said additional electrode can also form a condenser with a fourth electrode that is added to the system, in order to control a migration of certain electroactive substances responsible for coloring and decoloring the system. The operation of the system can thus be improved.