摘要:
Method and devices are disclosed for focusing on tilted image planes. For example, one imaging device includes an objective lens configured to focus a scene at an image plane, the scene having an object plane tilted relative to the objective lens plane and a sensor receive light from the objective lens, the sensor having a plurality of light sensing elements configured to generate image data based on the light received at the sensor. The imaging device also includes a processor and memory component configured to receive the image data, the image data indicative of a first image; receive a tilt parameter indicative of an orientation of a selected non-parallel image plane, and convert the image data to relative image data based on the tilt parameter, the relative image data indicative of a second image focused along the non-parallel image plane.
摘要:
A display device has a display, operable to generate a real image, and an optical system. In the optical system are at least two free-form reflective surfaces, S I and S2. At least one of the reflective surfaces is convex in one direction at substantially all points of its optically active area. Light rays from the display are reflected on SI before they are reflected on S2. The reflective surfaces SI and S2 are arranged to generate a virtual image from the real image on the display, by projecting light from the display to an eye position. The field of view occupied by the virtual image as seen from the eye position is greater than 50 degrees in at least one direction, preferably the direction linking the two eyes of an intended user.
摘要:
A laser diode assembly contains a plurality of laser diode chips (1402) packaged closely in a row. Each laser diode chip is bonded on both P-side and N-side to first and second sub-mounts (1409,1410). The sub-mounts are then attached to a cooling carrier (1401), with both bonding surfaces perpendicular to the top surface of the carrier. The direction of laser radiation is parallel to the carrier top surface, and the distance between the top (1404) of the active area (1403) of the laser diode chip and the carrier is preferably in a range of half a pitch (1413) between individual laser sources packaged in a row, preferably in a range of 0.2 mm to 1 mm to allow efficient cooling for high power operation. The sub-mounts may be electrically conductive, or they may be of insulating material at least partially covered with a conducting layer.
摘要:
Disclosed are a dual viewing film and a dual view display apparatus using the same, and the dual view display apparatus includes left and right edge emitting light sources (for example, LED light sources), a dual viewing film having a prism pattern and a lens shape at a lower surface of a substrate; a structured light guide plate, and a display panel (for example, an LCD panel) having a high refresh rate, thereby displaying different images, of which resolution is not reduced, to viewers in left and right directions.
摘要:
There is described a substrate (S) for security documents, such as banknotes, comprising one or more paper layers (11, 12) and a polymer layer (20) which is made to adhere to a side of at least one of the paper layers (11, 12), which polymer layer (20) is substantially transparent in at least one region of the substrate (S) which is not covered by the paper layer or layers (11, 12) so as to form a substantially transparent window (W) in the substrate (S) which is formed and closed by the polymer layer (20). The polymer layer (20) exhibits in the region of the window (W) a thickness (T) which is greater than a thickness (t) of the polymer layer (20) outside of the region of the window (W). The thickness (T) of the polymer layer (20) in the region of the window (W) is substantially equal to the added thickness of the paper layer or layers (11, 12) and of the polymer layer (20) outside of the region of the window (W) so that the substrate (S) exhibits a substantially uniform and constant thickness (T). The substrate (S) further comprises a micro-optical structure (30), in particular a lens structure, which is disposed in the region of the window (W) on at least one side of the polymer layer (20).
摘要:
Um beispielsweise eine optische brechende Struktur, die ein Sicherheitsmerkmal für ein Wert- und/oder Sicherheitsprodukt 100 bildet, individualisieren zu können, wird ein modifiziertes Sicherheitsmerkmal 200 geschaffen, das folgende Merkmale aufweist: (a) das Sicherheitsmerkmal 200 weist mindestens ein optisches Element 21 0 auf, das aus einem einen ersten Brechungsindex n 1 aufweisenden Material gebildet ist, und (b) das mindestens eine optische Element 210 weist optisch brechende Strukturen 220 auf, an denen von einem Umgebungsmedium L mit einem zweiten Brechungsindex n 2 in das Sicherheitsmerkmal 200 einfallende Strahlung S gebrochen wird oder an dem in das mindestens eine optische Element 210 eingefallene Strahlung S totalreflektiert wird. Für eine Individualisierung ist das mindestens eine optische Element 210 in mindestens einem musterbildenden Bereich 240 mit einem Strukturierungsmedium 235 überlagert.
摘要:
Vorrichtung (1) zur Beaufschlagung einer Innenseite (2) eines Zylinders (3) mit Licht (4), umfassend ein Homogenisatormittel (14), in das Licht (4) eintreten und aus dem das Licht (4) wieder austreten kann, wobei das Homogenisatormittel (14) eine zylindrische Innenfläche (15) aufweist, an der das Licht (4) nach dem Eintreten und vor dem Austreten reflektiert werden kann, weiterhin umfassend Mittel zur Einbringung von Licht (4) in das Homogenisatormittel (14), sowie Fokussiermittel, die aus dem Homogenisatormittel (14) austretendes Licht (4) auf die Innenseite (2) des mit Licht (4) zu beaufschlagenden Zylinders (3) fokussieren können.
摘要:
A microscope or endoscope, comprising a light condenser (such as an objective lens), and an array of micro-lenses (such as supported on a transparent plate), wherein the micro-lenses are arranged spatially to correspond in enlarged form to respective sub- resolution objects or point observational fields on or within a specimen that are separated from one another by an optically resolvable distance and to receive light from the sub- resolution objects or point observational fields, and each of the micro-lenses is arranged to converge light from the respective corresponding sub-resolution object or point observational field to a diffraction limited spot at an image plane.