Abstract: A compact zoom lens optical system suitable for use in a camera using a solid state photographing device and providing excellent correction of color aberrations, high zooming ratio, and telecentricity. The zoom lens optical system includes: a first lens group having a positive refractive power, the first lens group including two lenses; a second lens group having a negative refractive power; a third lens group having a positive refractive power; a fourth lens group having a positive refractive power; and a fifth lens group having a positive refractive power. The first through fifth lens groups are sequentially arranged from an object side and the first lens group is moved during zooming from a wide angle position to a telephoto position.

Abstract: In a light scanning apparatus including an optical system including a beam deflection means therein and a one-dimensional light modulation device, the one-dimensional light modulation device is disposed on the object side of the optical system, and the beam deflection means is disposed at a diaphragm position. In the optical system, a positive-power former group and a positive-power latter group are arranged, and a one-dimensional image obtained through light modulation by the one-dimensional light modulation device is scanned by the beam deflection means, to thereby form a two-dimensional image on an image plane of the optical system. In application to a projector apparatus or the like, the two-dimensional image can be enlargedly projected by a projecting optical system.

Abstract: An optical pickup includes at least a laser light source emitting a laser beam, a collimator lens system including a plurality of lenses for collimating the light beam emitted from the laser light source and incident thereupon as diffused light, and an objective lens. The laser beam transmitted through the collimator lens system is incident upon the objective lens. The collimator lens system includes a first lens unit held so as to be movable in an optical axis direction of the laser beam and a fixed second lens unit.

Abstract: An optical shutter includes a cell having a transparent panel and a hydrophobic transparent insulation panel which are arranged to face each other, a transparent electrode formed on an outer surface of the hydrophobic transparent insulation panel, and an opaque droplet contained in the cell and contacting an inner surface of the hydrophobic transparent insulation panel, wherein the amount of light transmitted is adjusted by changing a contact angle of the opaque droplet with respect to the hydrophobic transparent insulation panel. The opaque droplet may be hydrophobic or hydrophilic. The contact angle of the opaque droplet may be changed by applying an electric field between the transparent electrode and the opaque droplet.

Abstract: The invention provides a display medium including: a pair of substrates facing one another, at least one of the substrates being transparent; electrodes provided at opposing surfaces of the pair of substrates; and a light modulating layer disposed between the pair of substrates, the light modulating layer containing electrophoretic colored particles, a dispersion medium for dispersing the electrophoretic colored particles, and a reflection member having light reflection characteristics different from those of the electrophoretic colored particles, and the surface of the electrophoretic colored particles and the surface of the reflection member satisfying the following formula (1): 180>|?p??r|?20, in formula (1), ?p representing a contact angle (degrees) between the surface of the electrophoretic colored particles and water, and ?r representing a contact angle (degrees) between the surface of the reflection member and water.

Abstract: At least one exemplary embodiment is directed to an optical system which includes at least one first refractive optical element, which includes a solid material satisfying the following conditional expression (1), and at least one second refractive optical element, which includes a solid material satisfying the following conditional expression (2): ?1.33×10?3×?d+6.7×10?1<?gF ??(1) ?1.63×10?3×?d+6.2×10?1>?gF ??(2) where ?d and ?gF indicate the Abbe number and the partial dispersion ratio, respectively.

Abstract: At least one exemplary embodiment is directed to a zoom lens which includes, in order from an object side to an image side, a first lens unit having positive refractive power and is stationary during zooming, a second lens unit configured to move to perform zooming, a third lens unit configured to move to compensate for variation of an image plane caused by zooming, and a fourth lens unit having positive refractive power and is also stationary during zooming. The first lens unit includes, in order from the object side to an image side, a first lens subunit having positive refractive power and is stationary during focusing, a second lens subunit having positive refractive power, and a third lens subunit having negative refractive power and is also stationary during focusing. The second lens subunit moves along an optical axis during focusing.

Abstract: A lens barrel includes a lens moving frame configured to hold an image pickup lens; a barrel member configured to support the lens moving frame for back and forth linear movement along the direction of an optical axis of the image pickup lens; the lens moving frame having a magnetized face magnetized alternately with N poles and S poles along the direction of the back and forth linear movement; and, a magnetic resistance sensor apparatus. The magnetic resistance sensor apparatus has a magnetic resistance sensor, a body, a single screw, and a plurality of resilient pieces. The resilient pieces are formed such that, in a state wherein the resilient pieces are resiliently deformed all by the same amount, the sum of moments by the resilient pieces which act upon the location of the body at which the screw is fitted is zero.

Abstract: A magnifier for viewing a display of a device that is external to the magnifier, the magnifier is formed having an optical magnifying lens of a type that is structured for optically magnifying an external view that is optically visible there through, and includes mechanical structure that is configured for securing the magnifying lens to an electronic device having an optically viewable display with the magnifying lens arranged in a magnified focused viewing relationship with the display.

Abstract: In the case of a lens system (1), in particular in the case of a projection lens system for semiconductor lithography, it is possible to exchange at least one optical element, in particular the final optical element in the beam direction in the form of an end plate (3). For adjusting the exchangeable optical element (3), an optical quality fit with a fitting surface (6) is set between the optical element (3) and a mount (5) or a part connected to a mount (5).

Abstract: An optical modulation element is capable of forming a reflective diffraction grating in which heights of a plurality of elements each having a reflecting surface periodically change. The reflecting surfaces of at least one of the plurality of elements are driven in a direction of height by piezoelectric elements. The plurality of elements each having the surface as the reflecting surface are two-dimensionally arrayed by juxtaposing long sides. A rear surface side of an effective reflecting portion of each of the elements is fixed to the piezoelectric element.

Abstract: An image forming optical system comprises, in order from an object side, a first positive meniscus lens having a convex surface directed toward an object side, an aperture stop, a second positive meniscus lens having a convex surface directed toward the object side and a negative lens. At least one of surfaces of the negative lens is a spherical and the following condition is satisfied: ?2.0<?m/?p<0 ?2.0<(r1r+r2f)/(r1r?r2f)<1.0 where ?m represents the power of the negative lens at the position of the maximum light height and ?p represents the power of the negative lens at the position of the near axis, r1r represents the radius of curvature of the first lens at the image side and r2f is the radius of curvature of the second lens at the object side.

Abstract: The lens embraces a bulk-shaped lens body identified by a top surface, a bottom surface and a contour surface, and a well-shaped concavity is implemented in the inside of the lens body, aligned from the bottom surface toward the top surface. The lens body has geometry such as bullet-shape or egg-shape. A ceiling surface of concavity implemented in the lens body serves as a first lens surface, the top surface of the lens body serves as the second lens surface, and inside of the concavity serves as a storing cavity of a light source or a photodetector.

Abstract: A zoom lens of a novel configuration suitable for a collapsible lens barrel is disclosed. More specifically, here is disclosed a zoom lens, comprising four lens units which are, in the order from an object side toward an image side, positive, negative, positive and positive in optical power, and performing zooming by varying distances between each lens units. In this zoom lens, the fourth lens unit has a positive lens element and a negative lens element, and satisfies the following conditional expression: ?n??p where ?n is the Abbe number of the negative lens element of the fourth lens unit, and ?p is the Abbe number of the positive lens element of the fourth lens unit.

Abstract: A double substrate spatial light modulator with an enlarged tilt angle is achieved. The device comprises a mirror attached on one end to a hinge wherein the hinge is attached to support posts adjacent to the mirror and attached to an underlying glass substrate, a trench within the glass substrate adjacent to the support posts wherein the mirror tilts upward from the glass substrate and downward into the trench, and an overlying glass substrate. The trench provides an enlarged tilt angle of mirror motion. This improves optical performance of the mirror projector including contrast ratio and gray scale.

Abstract: An integrated type optical pickup module apparently approximates a plurality of light-emitting points of semiconductor lasers. An optical element is interposed between first and second semiconductor lasers. The optical element has first and second reflecting surfaces perpendicular to each other. The first and second reflecting surfaces reflect laser beams projected from the first and second semiconductor lasers, respectively. The optical element further has a mounting surface perpendicular to both the first and second reflecting surfaces. The optical element is mounted, via the mounting surface of the optical element, to a submount having a top surface on which the first and second semiconductor lasers are mounted. Heterojunction surfaces of the first and second semiconductor lasers may be substantially perpendicular to the first and second reflecting surfaces, respectively.

Abstract: An observation optical system including an objective optical part which forms an image of an object, an image inverting part which converts an image formed by said objective optical part into an erect image, and an eyepiece optical part which guides the erect image converted by said image inverting part to an observer. The objective optical part has a first lens unit with a negative power and a second lens unit with a positive power arranged from an object side in the order named, and said second lens unit is movable in a direction including a component perpendicular to an optical axis to stabilize an image.

Abstract: The small field-of-view (FOV) limitation of current coherent beam combiner technology is overcome, enabling beam combining over significantly larger fields of view. The system includes an input to receive an input wavefront, a local oscillator to generate a reference wavefront, and an optical combiner such as a beam splitter to combine the input wavefront and the reference wavefront to produce an output wavefront which is received by a detector. According to the invention, an optical element is supported to receive the reference wavefront and generate, in effect, a plurality of local oscillator point sources which provide a set of wavefronts that cover the required wider FOV. In the preferred embodiment, the optical element is a diffuser, and may optionally include a mechanism for rotating the diffuser to reduce speckle. In an alternative embodiment the optical element is a lenslet array.

Abstract: Electro-optical modulator (100), comprising at least one electrical port (918, 919) and an input circuit (915, 916, 917) for the application of a modulating electrical signal to the said at least one electrical port. The said modulator also comprises a linear processing circuit (250) capable of generating a compensation signal. This linear processing circuit comprises a first terminal connected to the input circuit for taking a fraction of the said modulating electrical signal, at least one filtering element (2, 3) for eliminating predetermined spectral components from the said fraction of the modulating electrical signal, and at least one phase-shifting element (4, 6) for inverting the phase of the said fraction of the modulating electrical signal. The said linear processing circuit also comprises a second terminal capable of being connected to the said at least one electrical port for applying the compensation signal to the said electro-optical modulator.

Abstract: A real image type finder optical system includes an objective lens group having positive refracting power and an eyepiece lens group having a positive refracting power. The objective lens group includes a first group consisting of a negative lens, a second group consisting of a positive lens, a third group consisting of a positive lens and a fourth group having a negative refracting power and forming part of an image inverting optical system. Upon zooming from a wide-angle end to a telephoto end, the first and fourth groups remain fixed and the second and third groups move. The eyepiece lens group comprises a fifth group that forms part of the image inverting optical system and a sixth group having positive refracting power. The resulting real image type finder optical system satisfies specific conditions with respect to the back focus of the first to third groups at the wide-angle end.