33 results about "Index-matching material" patented technology

The present invention provides improved collimating lens assemblies (32), improved methods of reducing the optical power density in collimating lens assemblies, and to improved fiber optic rotary joints (31) incorporating such improved collimating lens assemblies. The improved collimating lens assembly broadly includes: a singlemode fiber (38) terminating in a distal end; a step-index multimode fiber (44) having a proximal end abutting to the singlemode fiber distal end, and having a distal end; a graded-index multimode fiber (45) having a proximal end abutting the step-index multimode fiber distal end, and having a distal end; and a collimating lens (34) longitudinally spaced from the graded-index multimode fiber distal end by an intermediate air gap (43), and operatively arranged to collimate light rays emanating from the graded-index multimode fiber distal end. The improved collimating lens assembly is characterized by the fact that there is no epoxy, silicone gel or index-matching material between the graded-index multimode fiber distal end and the collimating lens. Rather, these various elements are fusion-spliced together. The improved collimating lens assembly is capable of handling energy levels that are typically used in various wavelength division multiplexing techniques.

The confocal displacement sensor includes a first optical fiber, to a first incident end of which light for light projection is input, the first optical fiber outputting the light from a first emission end, a second optical fiber, a second incident end of which is disposed to be opposed to the first emission end, the second optical fiber emitting light input via the second incident end from a second emission end, an optical member configured to cause an axial chromatic aberration on detection light emitted via the second emission end and converge the detection light toward the measurement object, a fiber connecting section configured to detachably connect the second incident end to the first emission end, and a refractive index matching material disposed between the first emission end and the second incident end.

An optoelectronic sensor is attached to an optically transparent substrate, such as glass, and encapsulated to form an optoelectronic device. An optical assembly can be mounted opposite the optoelectronic sensor. Filters and refractive index matching materials may be included between the optoelectronic sensor and the optically transparent substrate.

An optical fiber insertion unit includes a ferrule; a lens sleeve having a lens at a front end portion thereof and a ferrule insertion opening portion at a rear end portion thereof for inserting the ferrule; and a refractive index matching portion disposed between the ferrule and the lens sleeve. The refractive index matching portion is filled with a refractive index matching material so that the refractive index adjusting agent contacts with at least the lens.

A system is provided for improved coupling of photodetectors to optical demultiplexer outputs, for example an arrayed waveguide grating (AWG), using a refractive index matched material. In one embodiment, the system may include an optical demultiplexer including multiple optical outputs corresponding to multiple signal channels and a photodetector array including a plurality of photodiodes aligned with the multiple optical outputs. The system may also include an epoxy disposed within a gap between each of the photodiodes and each of the corresponding optical outputs of the optical demultiplexer. The epoxy may be configured to provide an index of refraction that is matched to the optical demultiplexer.

The disclosed embodiments provide systems and methods for mitigating lensing and scattering as an optical fiber is being inscribed with a grating. The disclosed systems and methods mitigate the lensing phenomenon by surrounding an optical fiber with a liquid index-matching material that is held in a vessel. The disclosed systems also include a replenishment mechanism that replenishes the liquid index-matching material as the optical fiber is pulled through the vessel.

A method for laser interference lithography using a diffraction grating includes (a) forming a photoresist layer on a work substrate to which a repeated fine pattern is to be formed; (b) forming a refractive index matching material layer on the photoresist layer; (c) forming on the refractive index matching material layer a diffraction grating layer having a period of diffraction grating within the range from λ/n_g to λ/n₀ (λ is a wavelength of laser beam, n_g is a refractive index of the diffraction grating, and n₀ is a refractive index in the air or in vacuum); and (d) exposing the photoresist layer by means of mutual interference of positive and negative diffracted lights with the same absolute value by inputting a laser beam perpendicularly to the diffraction grating layer. This method allows to realize an interference pattern with higher resolution and to use a laser source with lower coherence.

The disclosed embodiments provide systems and methods for mitigating lensing and scattering as an optical fiber is being inscribed with a grating. The disclosed systems and methods mitigate the lensing phenomenon by surrounding an optical fiber with an index-matching material that is held in a vessel with a sealed phase mask. The sealed phase mask allows it to be in contact with a liquid index-matching material without having the liquid index-matching material seep into the grooves of the sealed phase mask. Thus, for some embodiments, the sealed phase mask may be immersed in a liquid index-matching material without adversely affecting the function of the phase mask.

A splitter module, comprising an enclosure and a splitter device with one or more splitter legs mounted in the enclosure. Each splitter leg has an optical fiber therein extends for a certain length from the splitter. At least one of the splitter legs, and, thereby, the optical fiber, is cut. The cut may be at an angle to the longitudinal axis of optical fiber. The angle may be about 45 degrees. The coating may be stripped off such that the cut end of the optical glass fiber of the at least one output leg is exposed a certain distance. The cut end of the optical glass fiber positions in the interior of the enclosure. A glass-index-matching material, at least partially fills the interior of the enclosure such that the cut end of the optical fiber is embedded in the glass-index-matching material.

A multi-layered display system (e.g., a display including multiple display panels) includes at least first and second displays (e.g., display panels or display layers) arranged substantially parallel to each other in order to display three-dimensional (3D) features to a viewer(s). A refractive element is arranged on a top surface of the first display layer or between the first and second display layers. Index matching material may be provided between the first and second displays.

In an optical thin-film arrangement on a transparent optical substrate, such as a display screen, two or more conductive layers are stacked in an alternating fashion with one or more dielectric layers. The conductive layer can include, for example, indium-tin oxide (ITO), and the dielectric layer can include an index-matching material. The conductive layers can be in electrical contact with one another at their peripheries to provide EMI/RFI shielding. A structure having more than one conductive layer can be made to have the same net sheet resistance and thus provide the same degree of shielding as a conventional single-layer conductive coating but with lower reflectivity.