Abstract: A lens barrel that prevents an oscillation phenomenon caused by vibrations occurring when a lens of an image blur correction mechanism shifts. A first cylinder is engaged in the cam cylinder and caused to move in a direction of an optical axis by rotation of a cam cylinder. A second cylinder supports a lens holding member, which moves in a direction different from a direction of an optical axis so as to correct for an image blur, and is engaged in the cam cylinder and caused to move in the direction of the optical axis by rotation of the cam cylinder. The second cylinder has a first vibration isolation pin that is engaged with the first cylinder movably in the direction of the optical axis.

Abstract: An electronic apparatus equipped with an eye sensor holding structure that is capable of preventing erroneous detection of an eye sensor without increasing the number of members and of improving an appearance without increasing stray light. An eye sensor that detects an eye-contact state is implemented on a circuit board. A protection window is provided so as to cover a front of the eye sensor and is held in a state where the circuit board is positioned thereto. The protection window is fitted and positioned to an exterior member that has an opening through which the protection window is exposed to external appearance. An elastic member generates energization force for pushing the eye sensor so as to be contact with the protection window and for pushing the protection window so as to be contact with the exterior member.

Abstract: An imaging apparatus includes an electronic viewfinder unit that includes an image display element configured to display an image, an eyepiece optical system configured to enable the image to be observed from a rear side of the imaging apparatus, and a holder unit configured to hold the eyepiece optical system and the image display element. The holder unit moves the eyepiece optical system from a retracted position in which the eyepiece optical system is retracted in a body of the electronic viewfinder unit to an observable position in which the eyepiece optical system projects from the body of the electronic viewfinder unit to the rear side from the retracted position, and moves the image display element to the rear side.

Abstract: An electronic apparatus equipped with an eye sensor holding structure that is capable of preventing erroneous detection of an eye sensor without increasing the number of members and of improving an appearance without increasing stray light. An eye sensor that detects an eye-contact state is implemented on a circuit board. A protection window is provided so as to cover a front of the eye sensor and is held in a state where the circuit board is positioned thereto. The protection window is fitted and positioned to an exterior member that has an opening through which the protection window is exposed to external appearance. An elastic member generates energization force for pushing the eye sensor so as to be contact with the protection window and for pushing the protection window so as to be contact with the exterior member.

Abstract: A lens barrel that prevents an oscillation phenomenon caused by vibrations occurring when a lens of an image blur correction mechanism shifts. A first cylinder is engaged in the cam cylinder and caused to move in a direction of an optical axis by rotation of a cam cylinder. A second cylinder supports a lens holding member, which moves in a direction different from a direction of an optical axis so as to correct for an image blur, and is engaged in the cam cylinder and caused to move in the direction of the optical axis by rotation of the cam cylinder. The second cylinder has a first vibration isolation pin that is engaged with the first cylinder movably in the direction of the optical axis.

Abstract: An optical apparatus includes a first optical member (10) on which a concave curved surface is formed, a second optical member (20) on which a convex curved surface is formed, and a light amount adjuster (23) that includes a plurality of blade members (233) each having a convex curved shape portion and that changes size of an aperture to pass a light beam by a rotation of the blade members (233), the first and second optical members are disposed side by side in an optical axis direction so that the concave curved surfaces of the first and second optical members face each other, the light amount adjuster is disposed between the first and second optical members, and a radius of curvature of the convex curved shape portion of the blade member is smaller than that of the first optical member and is larger than that of the second optical member.

Abstract: Enabling a partial update of data for displaying map to thereby improve efficiency of an updating operation. The data for displaying map is constituted by a file group including a common map file CF and a plurality of regional map files RF-k. The regional map file RF-k is constituted by a map data portion RFM including map data corresponding to maps which are obtained by dividing a map of a predetermined reduction scale into predetermined areas and a regional map administration data portion RFR provided for managing the map data file. When the map is actually depicted on the basis of the map data, and map data corresponding to a map to be depicted are specified on the basis of data contained in the administration record CFC of the common map file CF and data contained in the regional map administration data portion RFR to thereby depict the map on the basis of the map data thus specified.

Abstract: Reducing a time when a navigation apparatus cannot be used by an update operation of data for displaying map to thereby avoid vexatious complication of update process. A navigation apparatus 100 reads out data for update from DVD in use of a DVD drive 106 to update data recorded in an HD for is playing map. In such the update, the navigation apparatus 100 precedently updates data corresponding to a map in the vicinity of a present position of vehicle, and simultaneously updates rest of the data in use of a vacant time of process.

Abstract: A transmission type screen including a fly-eye lens having a convex shape on one side thereof and a light-shielding layer provided on an opposite side of a lens surface of the fly-eye lens and having a plurality of openings provided near each focus of lens unit cells, wherein if uniform light perpendicular to an optical axis of the lens unit cell is incident upon the lens surface, luminance on an emission side of the screen when the screen is observed from a direction inclined against the optical axis of the lens unit lens by a predetermined angle in a horizontal direction when the screen is used is larger than luminance when the screen is observed from a direction inclined by the same angle as that in the horizontal direction in a vertical direction when the screen is used.

Abstract: The present invention provides a rear projection display screen exhibiting an extremely excellent practicability which can realize the prevention of reflection with no color slurring and can prevent the generation of a ghost image. In a rear projection display screen which includes a first optical member which converts a diffusion light from a light source into a collimated light, and a second optical member which converts the collimated light output from the first optical member to light having a proper output angle-luminosity distribution in the order from the light source side, at least a light-source side surface of the second optical member has a refractive index distribution.

Abstract: There is provided a rear projection screen for transmitting image light. The rear projection screen has a plurality of single lenses arrayed evenly on an incident plane for inputting the image light and having focal points in the vicinity of an outgoing plane of the rear projection screen, an incident-side black matrix, formed in lens boundaries where the plurality of single lenses adjoin each other, for blocking the image light incident on the lens boundaries and an outgoing-side black matrix in which an opening centering on an optical axis of the single lens is formed in the vicinity of each focal point of the plurality of single lenses in the vicinity of the outgoing plane of the rear projection screen.

Abstract: There is provided a transmissive type screen having a high contrast and display quality. The transmissive type screen has at least, in order from the side of a light source, a Fresnel lens, a microlens array and a transparent high cross-linking section formed at a focal point of each microlens and has an opaque section around the high cross-linking section centering on an optical axis of each microlens. Here, the opaque section shuts out light by dye molecules dispersed therein.

Abstract: A transmission type screen 306 including a fly-eye lens 171 having a convex shape on one side thereof and a light-shielding layer 173 provided on an opposite side of a lens surface of the fly-eye lens 171 and having a plurality of openings 174 provided near each focus of lens unit cells 170, wherein if uniform light perpendicular to an optical axis of the lens unit cell 170 is incident upon the lens surface, luminance on an emission side of the screen when the screen is observed from a direction inclined against the optical axis of the lens unit lens 170 by a predetermined angle in a horizontal direction when the screen is used is larger than luminance when the screen is observed from a direction inclined by the same angle as that in the horizontal direction in a vertical direction when the screen is used.

Abstract: When casting castable refractories as lining refractories of a ladle for a molten metal, wherein the castable refractories are prepared by kneading monolithic refractories with an aqueous solution of a binder containing alumina cement, the castable refractories are preheated on the basis of the open air temperature and cured after casting while keeping the temperature thereof within a set temperature range of from about 20.degree. C. to 40.degree. C. The method stabilizes the hardening time of castable refractories and forms cast refractories excellent in strength and erosion resistance.

Abstract: Disclosed are glycolipid derivatives of formula (I) ##STR1## wherein X is a group selected from ##STR2## n is 0 or an integer of 1-10 and R denotes a branched hydrocarbon chain containing from 19 to 39 carbon atoms. Those compounds are useful as antiinflammatory agents, or as agents for the treatment of rheumatoid arthritis.