40 results about "Guided ray" patented technology

An optical sensor device for the detection of ambient light is adapted to be coupled to a pane (10), in particular to a windshield of a vehicle. The optical sensor device has a sensor unit which includes at least one light receiver (22) for ambient light and a lens plate (12) for directionally coupling an ambient light beam (26) out of the pane (10) onto the light receiver (22). The lens plate (12) has a surface (18) facing the light receiver (22) and oriented substantially parallel to the pane (10) in the coupled condition of the optical sensor device. The surface (18) includes a prism structure (20) having a plurality of single prisms (24) which are designed to direct the rays of a specific ambient light beam (26) defined by a principal direction (A) and an aperture angle onto the light receiver (22).

A lighting device (100) for use in a luminaire (200) comprising: —a base (101) having a longitudinal axis (LA) and comprising an electrical connector (102) for connecting the lighting device (100) to a luminaire socket (201) of the luminaire (200), —at least one LED-filament (103) comprising a substrate (104) having an elongated body and a plurality of light sources (105) mechanically coupled to the substrate (104), the plurality of light sources (105) configured for emitting light (106) in a first spatial light distribution, —at least one light guide (107) having an elongated body, comprising at least one light in-coupling portion (108) at at least on the external periphery of the at least one light guide (107) for coupling light (106) into the at least one light guide (107), a plurality of light out-coupling portions (109) for coupling light (106) out of the at least one light guide (107) in a second spatial light distribution, —an at least in part light-transmissive envelope (110) at least partly encapsulating said at least one LED-filament (103) and said at least one light guide (107), —wherein the at least one light guide (107) is arranged for guiding the light (106) coupled into the at least one light guide (107) at the at least one light in-coupling portion (108) via total internal reflection (111) to the plurality of light out-coupling portions (109), —wherein the at least one LED-filament (103) is external to the at least one light guide (107).

The invention provides a total reflection lens. The total reflection lens is a conical light transmission body with a wide upper part and a narrow lower part and is provided with a through hole which can be used as a light incidence lens surface along a central axis; the upper end of the through hole is connected with an externally extended conical hole, and the through hole can be used as a lightemergence lens surface; one or more open grooves are arranged at the externally extended conical hole so that when a light source is arranged at the through hole of the total reflection lens, the most concentrated strong light in the center can expand the light distribution angle at the through hole and the externally extended conical hole, and the side light at the peripheral ring of the light source can be led to the externally extended conical hole and is emitted from the same through the reflection of the light incidence lens surface and the outer conical surface of the total reflection lens so as to increase the light focusing effect, the light emitting strength and the ray light with extremely high uniformity in an illumination region. The total reflection lens can ensure that the light ray can be emitted from the open grooves; and in addition, the total reflection lens has the function of leading ray for side illumination.

A holographic information recording and / or reproducing apparatus including: a light source unit emitting reference light and signal light; a first optical path guiding unit guiding the lights to cross; a second optical path guiding unit including a first polarization converter located on an optical path of one of the reference and signal lights, a first polarization beam splitter located at a crossing point of the reference light and the signal light, an optical path converter guiding the reference light and the signal light so that they cross again, a second polarization converter located on an optical path of the signal light before the signal light crosses the reference light, and a second polarization beam splitter uniting the optical paths of the reference light and the signal light; and an objective lens unit illuminating the reference light and the signal light onto one side of a holographic information storage medium.

The light guide, especially for motor vehicle signal lamps, comprises a collimator with a collimating wall for binding and routing light rays, and a light guiding body that continues the collimating wall, is of a material with refractive index (n), and is integral, spatially shaped, planar, and fitted at its end with an output emitting surface providing a signal light function. The first height (d) of the body at its beginning where it adjoins the collimating wall, is bigger than its second height where it passes into the emitting surface. The body is adapted to emit light rays generally within angle (ω) of diffusion from the optical axis (x), and comprises a transitional surface that is, in its profile towards the emitting surface, inclined towards the longitudinal axis of the profile. The ratio of inclination height (a) and inclination length (b) of the transitional surface is defined as:ab=tg⁢⁢(12⁢arc⁢⁢sin⁡(sin⁢⁢ωn))

The invention provides a waveguide element comprising a waveguide (100) capable of guiding light rays in two dimensions via total internal reflections, and a diffractive optical element (DOE) (120) arranged on or within the waveguide (100), wherein the diffractive optical element (120) is adapted to allow propagation of light rays inside the waveguide (100) along the two dimensions so that the light rays can propagate at least from one first location (140) of the diffractive optical element (120) to at least one second location (150) of the DOE (120) along different routes (160A, 160B) havingthe same geometrical optical path length. The DOE (120) is further adapted so that at least for one wavelength range the difference in physical optical path lengths for light rays having propagated along the different routes (160A, 160B) is longer than the coherence length, so that the rays sum incoherently at the second location (150).

A strip detecting apparatus includes a black box, a light guide plate disposed on the black box, a light source, an optical calibration card, a strip platform, a test strip contained in the strip platform, an image capturing device and an image processing device. The light source is disposed on the black box to emit light toward the black box via the light guide plate. The image capturing device is disposed on the black box for respectively capturing an optical calibration image and a detection image when the optical calibration card and the strip platform are inserted into the black box respectively. The image processing device is coupled to the image capturing device for calibrating relationship information between the concentration and the grayscale value of the test strip according to the optical calibration image and for generating a test result according to the calibrated relationship information and the detection image.

The light-conductive optical system comprises a planarly shaped light guide (1) made from an optically transparent material with an associated light unit (3) and a collimating element (2). The light guide (1) comprises an output surface (12) for the output of light rays (10) and a binding surface (11) to bind light rays (10) to the light guide (1). The output surface (12) and the binding surface (11) are situated on surfaces that transversally connect the top (5) and bottom surface (6) of the light guide (1) and the binding surface (11) comprises a partial surface (11c) situated opposite the output surface (22) of the collimating element (2) and a lateral partial surface (11a, 11b) at one or both sides of the partial surface (11c). The height (v) of the output surface (22) is bigger than the thickness (t) of the light guide (1) so the output surface (22) reaches above the top surface (5) and / or below the bottom surface (6) of the light guide (1) with its overlapping part (8, 9). The light guide (1) is, for each overlapping part (8, 9), fitted with at least a pair of reflective means (4a, 4b; 4c) comprising the first reflective means (4a, 4b) situated opposite the overlapping part (8, 9) to bind at least a part of light rays (10) exiting from the overlapping part (8, 9) and to reflect them to the second reflective means (4c) adapted to direct light rays (10) against the lateral partial surface (11a, 11b).

The present invention has an object to provide a liquid crystal display device and a turning film for use in a liquid crystal display device that are capable of inhibiting irregularities in color andluminance caused by polarization. The liquid crystal display device includes a liquid crystal panel; a light-guiding plate that is disposed on a back face side of the liquid crystal panel and is for guiding rays of light incident on an end face toward a front face side; an LED light source disposed along the end face of the light-guiding plate; and a turning film disposed between the liquid crystal panel and the light-guiding plate. The turning film includes: a substrate layer formed from a transparent resin; and a prism array disposed on a back face side of the substrate layer. A retardationvalue of the substrate layer is no less than 0 nm and no greater than 100 nm. In a planar view, a transmission axis of the back face side-polarizing plate of the liquid crystal panel is perpendicularto the end face of the light-guiding plate; the ridge lines in the prism array of the turning film are parallel to the end face of the light-guiding plate; and the transmission axis of the back face side-polarizing plate of the liquid crystal panel is perpendicular to the ridge lines in the prism array of the turning film.