Abstract:
본 발명은 유리섬유를 인장 센서로 사용하는 광학 인장 측정장치(1)에 관한 것이다. 이 인장 측정장치는 피복을 구비한 유리섬유를 갖는다. 피복은 폴리에테르에테르케톤(Poly Ether Ether Ketone)과 최소 10 및 최대 40 중량% 상당의 무기질 채움제의 혼합물로 구성되고, 입자 크기는 0.08㎛ 내지 12㎛이다. 피복의 바깥지름은 0.2mm 내지 1.2mm이다. 피복의 바깥지름 D과 유리섬유의 지름 d의 비율 D/d은 2 내지 6이다. 피복이 유리섬유에 가하는 압력은 유리섬유와 피복 사이에 상대운동이 거의 일어나지 않을 정도인 것을 특징으로 한다.
Abstract:
This invention provides a material for pressure measurement which develops a color by taking advantage of a color development reaction between an electron donating colorless dye precursor and an electron receiving compound and causes a difference in color density between before the application of a pressure of 0.05 MPa and after the application of a pressure of 0.05 MPa, i.e., ΔD, of not less than 0.02. Preferably, the electron donating colorless dye precursor is included in a microcapsule, and, when the median diameter of the microcapsule on a volume basis is A μm, 5000 to 30000 microcapsules having a diameter of not less than (A + 5) μm are present per 2 cm x 2 cm.
Abstract:
The rolled photonic fibers presents two codependent, technologically exploitable features for light and color manipulation: regularity on the nanoscale that is superposed with microscale cylindrical symmetry, resulting in wavelength selective scattering of light in a wide range of directions. The bio-inspired photonic fibers combine the spectral filtering capabilities and color brilliance of a planar Bragg stack compounded with a large angular scattering range introduced by the microscale curvature, which also decreases the strong directional chromaticity variation usually associated with flat multilayer reflectors. Transparent and elastic synthetic materials equip the multilayer interference fibers with high reflectance that is dynamically tuned by longitudinal mechanical strain. A two-fold elongation of the elastic fibers results in a shift of reflection peak center wavelength of over 200nm.
Abstract:
Systems and methods of sensing intraocular pressure are described. In one embodiment, a miniaturized IOP monitoring system is provided using a nanophotonics-based implantable IOP sensor with remote optical readout that can be adapted for both patient and research use. A handheld detector optically excites the pressure-sensitive nanophotonic structure of the IOP-sensing implant placed in the anterior chamber and detects the reflected light, whose optical signature changes as a function of IOP. Optical detection eliminates the need for large, complex LC structures and simplifies sensor design. The use of nanophotonic components improves the sensor's resolution and sensitivity, increases optical readout distance, and reduces its size by a factor of 10-30 over previously reported implants. Its small size and convenient optical readout allows frequent and accurate self-tracking of IOP by patients in home settings. Embodiments can also be used to monitor colonies of animals to support glaucoma research and drug discovery.
Abstract:
The invention relates to an optical strain gauge (1) using a glass fibre as a strain sensor. The strain gauge comprises a glass fibre comprising a sheath. The sheath has the following composition: a mixture of polyether ether ketone and an admixture of at least 10 weight percent and a maximum of 40 weight percent of an inorganic filler, with a particle size of between 0.08 µm and 12 µm. The outer diameter of the sheath is between 0.2 mm and 1.2 mm. The ratio D/d between the outer diameter D of the sheath and the diameter d of the glass fibre is between 2 and 6. A pressure of the sheath on the glass fibre is such that essentially no relative movement can occur between the glass fibre and the sheath.
Abstract:
A switching element responsive to pressure comprises at least two electrodes, which are separate from one another and an intrinsically pressure-sensitive organic layer arranged between and in contact with the electrodes in such a way that, in response to a pressure being applied to the switching element, the intrinsic electrical conductivity of the pressure-sensitive organic layer increases between at least one pair of the electrodes and, consequently, the electrical resistance between the pair of electrodes decreases. At least one of the electrodes comprises a resistive layer where this electrode faces another one of the electrodes with respect to the intrinsically pressure-sensitive organic layer.