Abstract: A dot matrix hologram with a hidden image is disclosed, wherein the hidden image technology is applied to a dot matrix hologram. Although the hidden image technology has been used in a conventional hologram, it has not been used in a dot matrix hologram. Although the above two kinds of hologram both can show hidden images with illuminating laser light, the disclosed dot matrix hologram with a hidden image and the conventional hologram with a hidden image use different working principles and have different detailed characteristics to create hidden image regions.

Abstract: A microscope with a dynamic damper, and an optical system including a plurality of optical elements and having an optical axis. The dynamic damper attenuates vibration of the microscope in the direction of the optical axis by using part of the plurality of optical elements as a mass displaceable in the direction of the optical axis in accordance with said vibration.

Abstract: Disclosed is a diffractive optical element which includes a diffractive grating pattern on a base plate. The diffractive grating pattern includes a plurality of phase gratings arranged in parallel lines extending along a predetermined direction to cause diffraction of an incident beam. Each of the plurality of phase gratings has an asymmetrical phase pattern. There is a phase gap, &Dgr;P, representing a phase difference (in radians) between an end point and a beginning point of each phase pattern. The phase gap, &Dgr;P, is substantially equal for each of the plurality of phase gratings and satisfies the relationship. 0.7&pgr;<|&Dgr;P|<1.2&pgr;.

Abstract: The invention involves a holographic system containing a photopolymer-type storage medium located in the system's optical path, where the medium is rotated around a first axis such that the surface of the medium is in a non-orthogonal relationship with the optical path, and a spatial light modulator also located in the optical path, where the modulator is rotated around a second axis that is substantially orthogonal to the first axis, and wherein the surface of the modulator is in a non-orthogonal relationship with the optical path. This arrangement compensates for at least a portion of aberration introduced by the photopolymer media, thereby allowing presentation of a flatter, more focused, and less distorted image at the sensor.

Abstract: The optical system of the microscope includes a close-up optical system that faces an object, a pair of imaging optical systems that take object light rays passing through regions of the close-up optical system, and an illuminating optical system that guides illumination light emitted from a light source to illuminate the object. Each lens included in the close-up optical system has a semicircular shape in which one side is cut out. The close-up optical system is held in a first lens barrel, and the illuminating optical system is held in a second lens barrel. The second lens barrel is arranged in the cutout space of the close-up optical system inside the first lens barrel. A light shielding member is attached to the second lens barrel to prevent a leak of the illumination light through grooves formed on the second lens barrel.

Abstract: A graded anti-reflective coating (ARC) with one or more layers has a bottom layer that is highly absorbing at the lithographic wavelength, and one or more layers between the substrate and the resist layer having inhomogeneous optical constants. The refractive indices are matched across layer interfaces, and the optical constants vary smoothly through the layer thicknesses. In each layer the extinction coefficient and the refractive index have independently selectable values and gradients. This ARC structure provides almost total absorption in the bottom layer and near-zero reflection at the resist interface and all other intermediate interfaces. Layers are preferably of inorganic materials, typically SiOxNy. Because of its highly absorbing bottom layer, an ARC according to an embodiment of the present invention works effectively over diverse substrate materials for a variety of lithographic wavelengths. It provides great latitude of manufacturing tolerances for thicknesses and optical constants.

Abstract: A cover plate on a holographic optical element (HOE) device corrects for aberrations, such as spherical aberrations. The HOE device includes an emulsion material, having a recorded interference pattern that can perform diffraction, sandwiched between a first element and a second element, wherein the second element functions as the cover plate. One of the surfaces of the second element is aspheric to correct for aberrations. The aspheric shape of the surface adds approximately equal and approximately opposite aberrations associated with light rays diffracted by the recorded interference pattern, thereby substantially improving focus.

Abstract: The invention relates to the field of optical fiber wavelength division multiplexed transmission, and more particularly to the field of narrow-band optical filters for dense multiplexing. The invention proposes a narrow-band optical filter with a group-delay response that is very flat in the working band, obtained by cascading two Bragg gratings having group delays that are linear as a function of wavelength in the working band, but with their gradients being of opposite signs. The present solution is easier and less costly to implement than the prior art solutions, and it should also offer higher performance.

Abstract: A panoramic telescope of the type having a body 3 to be mounted on a vehicle, a head-piece 9 attached to the body and rotating with respect thereto. A window 11 is provided for observing the external scenery. Inside the head-piece is a mirror 13 for deflecting the incoming beam from the window towards an optical detector.

Abstract: A system for producing a white-light interference hologram includes a camera adapted for recording a first and a second bitmap image of a scene from separate vantage points, and the separation distance of the vantage points, a computing engine adapted to compute three-dimensional x, y, and z characteristics of an interference hologram topology for the scene from the bitmap image and separation data, wherein x and y are two dimensional locations of bits in a bitmap of the topology and z is a depth dimension for each x,y bit, and a printer adapted to print in color the x,y bitmap, and to create the depth dimension z at each x,y bit location, providing thereby a three-dimensional interference hologram topology for the scene. In a preferred embodiment the depth dimension is created by electrophoresis, using a medium having an electrophoretic gel layer, with the ink applied to the gel in a bit-mapped pattern being ionic in nature, and capable of being migrated in the gel layer by electrophoresis.

Abstract: A system and method for generating a system are disclosed. The system includes a display device comprising a plurality of display regions, each region configured for displaying a color component of the image. A display controller is coupled to the display device and is operable to activate the regions of the display device to display portions of the image. A plurality of light directing devices are positioned to receive light from regions of the display device and direct light towards an image plane. The system further includes a light directing controller coupled to the light directing devices to direct light received thereby to different areas of the image plane. The areas of the image plane generally correspond to the different portions of the image displayed by the regions of the display device.

Abstract: A surface pattern comprises microscopically fine relief structures that diffract visible light. When the surface pattern is illuminated perpendicularly with white light, the surface pattern appears with bright and dark regions from a first viewing direction. The length and/or position and/or number of bright and dark regions changes as the viewing angle changes. Preferably, the contour of the surface pattern is selected so that the length or position of the bright regions changes markedly when the viewing angle changes.

Abstract: A microscope stage of this invention includes an upper stage, a handle shaft rotatably supported on the upper stage, a pulley rotatably supported on the upper stage in a position different from the handle shaft, a lower stage directly driven and guided with respect to the upper stage and a transmission member for interlocking the handle shaft, pulley and lower stage.

Abstract: A holographic security device comprising first and second holographic generating structures (2,3) recorded in respective sets of substantially non-overlapping regions of a record medium is disclosed. The regions of one set are interleaved with regions of the other set, whereby both interleaved line structures are substantially non-visible to the unaided eye, whereby the holographic security device generates two or more holographic images (A,B) viewed from separate viewing directions around the device and normally seen by tilting the device. Each particular holographic image in a viewing direction is generated in whole or part by the holographic structure associated with one set of interleaved lines.

Abstract: A system and method to divert a reference beam from intersecting with a diffuser disposed adjacent to a holographic recording material for recording a hologram. The invention includes a thin holographic deflector designed to deflect the reference beam away from the diffuser and to prevent the reference beam's passage and impingement onto the diffuser surface. The holographic deflector is designed to deflect only light impinging on it from the particular angle that the reference beam strikes the holographic recording material, and to transmit nearly all other light striking it. The deflector eliminates artifacts from the resulting hologram introduced by the reflected reference beam, while allowing the diffuser to be placed very close to the holographic material.

Abstract: An illumination system (1) for a microscope, in which a first light source (2), a collector lens (3), an aperture diaphragm (4), and a condenser lens ((5) are arranged in the illumination beam path (6), is described. The illumination light is directed through the aperture diaphragm (4) via the condenser lens (5) into the object plane (9). Arranged in the illumination beam path (6) on the optical axis (20) is a second light source (8) that is imaged at infinity by the condenser lens (5).

Abstract: The invention makes it possible to form a hologram for reproducing a three-dimensional image easily free of limitations placed by the size of the three-dimensional image to be reproduced, the size of the hologram and reference light for reproduction. A controller calculates a three-dimensional interference pattern for generating reproduction light associated with a desired three-dimensional image when a recording medium (1) is illuminated with reference light for reproduction, divides the three-dimensional interference pattern into partial interference patterns and calculates reference light and information light for recording for each of the partial interference patterns. A final hologram is formed by illuminating the recording medium (1) with reference light and information light for recording using a head (10) while changing the relative positional relationship between the recording medium (1) and the head (10) by moving the head (10) with a VCM (13) while transporting the recording medium (1).

Abstract: In relay optics for a deflection system with two scanning devices, each of which changes the angle of a light bundle from a location predetermined separately for each scanning device in a predetermined deflection plane within a predetermined deflection area, an optical system and a mirror surface are provided, wherein the optical axis coincides with respect to position and direction with the central normal of the connecting straight line between the predetermined locations of the first scanning device and second scanning device and the shape and position of the mirror surface are realized in accordance with the conditions that the two vectors, the direction vector of the light bundle and the surface normal of the mirror surface, each projected in the deflection plane of the first scanning device, are identical with respect to direction for every point of incidence of the light bundle on the mirror surface given by the deflection of the first scanning device and that the path of the light bundle running toward

Abstract: An outside plant fiber distribution apparatus includes a frame member and a plurality of fiber optic modules mounted to the frame member. The frame member includes upper and lower module mounting brackets. Each module includes a front and two mounting flanges, each mountable to one of the upper and lower module mounting brackets. At least one of the modules is configured as a connection module including a plurality of connection locations disposed along the front of the module. A rear of the module includes a cable notch region for receipt of a cable. At least one of the modules defines a storage module including first and second spools. In an interconnect system, the storage module includes a cable clamp for holding a second cable, the cables are connected through the connection locations of the connection module. In a cross-connect system, two connection modules are provided, and patch cords are used to connect the fronts of the connection modules.

Abstract: An optoelectronic module that can be coupled to a multimode optical fiber to achieve offset launch of optical signals into a multimode optical fiber without the use of specialized components or equipment is disclosed. An optoelectronic module in accordance with the present invention achieves this by offsetting the center of the core of the optical fiber pigtail that is coupled to the optoelectronic transmitter device. Thus, the optical fiber pigtail comprises a predetermined offset of the center of the core with respect to the center of the optical fiber. Such an offset can be readily manufactured in an optical fiber using rod-in-tube technology. The precise offset can be designed to correspond to the offset launch zone of the multimode optical fiber to which the optoelectronic module may be coupled.