737 results about "Lens hood" patented technology

An apparatus according to one embodiment includes an endoscope tip including a housing that is monolithically formed of a transparent material. At least one optical component is at least partially encased within the housing. The optical component can be, for example, a light source, a fiber optic, an imaging sensor, a lens, a reflector or a light shield. In another embodiment, an apparatus includes an endoscope having a distal end portion that includes a housing. The housing is monolithically formed with a transparent material and a light source is at least partially encased within the housing. The housing also includes a micro-defects portion within the transparent material of the housing. The micro-defects portion is configured to provide a selected output shape of a beam of light produced by the light source.

A head mounted virtual image display unit is provided which is compact in size and weight, and incorporates a high performance optical system offering a clear see-through capability. A sliding light shield may be incorporated for those instances when see-through capability is not desired. A focus adjustment may be incorporated to permit the focusing of the image, for example, at a distance of approximately 18 inches to infinity. An adjustable headband may be incorporated that adapts to fit the users head. A flexible boom structure may be incorporated to facilitate fine positional adjustment of the optical assembly. A slider and ball joint mechanism may also be incorporated to facilitate positional adjustment of the optical assembly. A built-in microphone may be incorporated to enable speech input by the user. The head mounted virtual image display unit may be used comfortably in conjunction with eye or safety glasses, and provides a useful image to the user without blocking his view of the surrounding environment. The unit is designed to have a pleasing appearance so as to greatly enhance user acceptability.

A projector type vehicle headlamp comprises a reflector, a light source, a projection lens, a rotational shade to shield part of light reflected on the reflector so as to be directed towards the projection lens and a motor for driving the rotational shade based on a light distribution switching over operation. In the headlamp, a high beam corresponding light shielding plate and an another beam corresponding light shielding plates are disposed on the rotational shade on both sides of a low beam corresponding light shielding plate, so that the light distributions are attempted to be switched over speedily between the low beam and the another beams and the generation of glare is attempted to be prevented.

A recessed luminaire is described. The luminaire may include an aiming system allowing a rotation angle and/or a tilt angle of a light source to be adjusted while the light source is in operation. Additionally, the luminaire includes a light shield that is coupled to the aiming system such that the light shield may move in relation to the tilt angle and the orientation of the light source. The aiming system may be further coupled to a support panel such that rotation of the aiming system is provided by a rotatable coupling between one or more leaf Springs of the aiming system, and an upper surface of the support panel.

A lamp that can concentrate light has two brackets, two shade holders, a shade, two sockets and two illuminating elements. The shade holders are attached respectively to the brackets. The shade is mounted between the shade holders and has a tubular body, a slit and an extension. The tubular body is made of an opaque material and is attached to the shade holders. The slit is longitudinally defined through the tubular body. The extension extends from the tubular body along the slit. The sockets are respectively mounted on the shade holders. The illuminating elements are attached to the sockets and are mounted in the open ends of the tubular body of the shade. Accordingly, the light emitting from the illuminating elements is concentrated and emits only from the slit in the shade to increase the brightness of the light emitted from the lamp.

CMOS image sensor pixel sensor cells, methods for fabricating the pixel sensor cells and design structures for fabricating the pixel sensor cells are designed to allow for back side illumination in global shutter mode by providing light shielding from back side illumination of at least one transistor within the pixel sensor cells. In a first particular generalized embodiment, a light shielding layer is located and formed interposed between a first semiconductor layer that includes a photoactive region and a second semiconductor layer that includes the at least a second transistor, or a floating diffusion, that is shielded by the light blocking layer. In a second generalized embodiment, a thin film transistor and a metal-insulator-metal capacitor are used in place of a floating diffusion, and located shielded in a dielectric isolated metallization stack over a carrier substrate

A light shield sized to engage over a major portion of a display to substantially inhibit light from reaching a region between the light gathering element and the display. An optical coupling element is associated with the light gathering element to direct light emanating from the display to a light sensitive element in order to determine corrective data to reduce mura effects.

A lighting unit for a vehicle headlamp is provided with a projection lens, a light source, a reflector, a shade, and a convex lens. The projection lens is arranged on an optical axis extending in a longitudinal direction of a vehicle. The light source is arranged on a rear side of a rear side focal point of the projection lens. The reflector is configured to reflect forward a light from the light source toward the optical axis. An upper end edge of the shade passes through a vicinity of the rear side focal point. The shade is configured to shield a part of a reflected light from the reflector. The convex lens is arranged between the light source and the shade. The convex lens is configured to converge the light from the light source into the vicinity of the upper end edge of the shade.

When a video signal is inputted to a projector (10) through a video input terminal, a luminance peak value of an image of the video signal is detected by an image-analyzing circuit (61) to be outputted to a CPU (71). A gain-adjusting circuit (63) adjusts a luminance signal in the video signal based on a command from the CPU (71). The CPU (71) determines a gain adjustment amount based on the luminance peak value of the image obtained by the image-analyzing circuit (61) and outputs the result to the gain-adjusting circuit (63). For instance, when the luminance peak value (lp) of the image is 50% of the upper limit (Imax) thereof, a gain-adjusting amount AG is doubled In this case, an illuminating light volume of a light valve (44a) has to be reduced to 50%, which is achieved by light-attenuation by a light-source lamp (21) and an open/close light shield (23).

An image pickup apparatus is provided. The image pickup apparatus permitting a conversion lens to be mounted and dismounted, wherein a lens hood is composed of a base portion on the mounting side and a tubular portion on the front side, the base portion and the tubular portion are detachably coupled to each other, and another lens is contained in the inside of the lens hood when the another lens is mounted on the front side of an optical system, whereby even when the conversion lens is being used, the lens hood can be used as it is, and the incident light contracting function of the lens hood can be maintained.

A reliable detection of optically detecting the type of recording media is achieved. A part of a support member for supporting an optical sensor is pushed against the surface of a sheet by a spring so as to maintain the gap between the sensor and the sheet surface. With this arrangement, a recording apparatus which is free from wrong detection is achieved regardless of a gap-varying factor, that is, the remaining amount of sheets. Also, by arranging a part of a light-shielding hood so as to abut against the sheet, wrong detection due to disturbance light can be prevented.

The invention relates to a camera protective device in the video surveillance field, in particular to a camera protective cover with a self-cleaning device. The camera protective cover comprises a cover body, a sunshading board, a front end cover, a filter and a back end cover, wherein the front end cover and the back end cover are separately fixed on the front and back of the cover body; the front end cover is provided with a filter hole; the filter is fixed in the filter hole; the sunshading board is covered on the cover body; the camera protective cover also comprises the self-cleaning device; the self-cleaning device comprises a lens hood, an air pump and an air pipe; the hood body of the lens hood is provided with a circular vent pipe; the vent pipe is connected with the air pump through the air pipe; the inside of the circular vent pipe is provided with rows of small holes; each row of small holes has a plurality of small holes, the small holes point to the filter from different directions; and the circular part of the back end of the lens hood is provided with a clip, and the clip is clamped in a slot on the lens frame of the filter. The beneficial effect of the invention is that a unique cleaning and dustproof structure adopting air-blowing is designed and the functions of dustproof and decontamination can be effectively realized.

A monitoring camera with a far infrared capability has a cylindrical body (10), a lens hood (20), a luminous body (30) with multiple far infrared light emitting diodes (LEDs) and a lens cover (40). The lens hood (20) is a hollow cylinder and is divided into an inner segment and an enlarged outer segment (23) communicating with the inner segment. The enlarged outer portion (23) provides an enlarged compartment to hold a larger luminous body (30), which can hold more far infrared LEDs so the monitoring camera can see object at greater visual distances. Additionally, the field of vision the monitoring camera is also greater.

A vehicular headlamp including a light blocking moveable shade which is provided to rotate about a rotational axis line that extends in the width direction of a vehicle. The moveable shade is linked to an actuator via a link member and has an outwardly curved upper end edge that extends along the rear focal plane of a projection lens when the moveable shade is in the light shielding or light blocking position. The distance between the rotational axis line and a connection point of the moveable shade and the link member is set to be smaller than the distance between the rotational axis line and the upper end edge of the moveable shade, and the center of gravity of the moveable shade is positioned in the vicinity of the rotational axis line.

A backside illuminated image sensor includes a semiconductor layer and a trench disposed in the semiconductor layer. The semiconductor layer has a frontside surface and a backside surface. The semiconductor layer includes a light sensing element of a pixel array disposed in a sensor array region of the semiconductor layer. The pixel array is positioned to receive external incoming light through the backside surface of the semiconductor layer. The semiconductor layer also includes a light emitting element disposed in a periphery circuit region of the semiconductor layer external to the sensor array region. The trench is disposed in the semiconductor layer between the light sensing element and the light emitting element. The trench is positioned to impede a light path between the light emitting element and the light sensing element when the light path is internal to the semiconductor layer.

A thermally assisted magnetic head which can realize high-density writing onto magnetic recording media is provided.

The thermally assisted magnetic head includes a magnetic head part having a medium-opposing surface and a back face opposing the medium-opposing surface. The magnetic head part has a recording head part, an optical waveguide, and light shields. The optical waveguide extends along the opposing direction of the medium-opposing surface and back face. Each of the light shields extends along the opposing direction of the medium-opposing surface and back face and inhibits laser light from passing between the medium-opposing surface and back face. The optical waveguide and light shields are arranged on a first line when seen from the back face. When seen from the back face, the light shields oppose each other while interposing the first line therebetween and are arranged on a second line substantially orthogonal to the first line.

A solar photovoltaic module including a base member supporting an array of photocells as well as corresponding concentrating lenses and light guides. At least one opaque light shield defines cutouts corresponding to the light guides. The at least one opaque light shield is positioned above the base member and operates to block light incident thereon from reaching portions of the base member. The at least one light shield can be installed with a convex shape that directs condensation away from the cutouts and preferably functions as part of guide channels that guide condensation toward one or more vented hydrophilic members (e.g., sponges and the like), which are preferably disposed at one or both ends of the module.

A light-emitting diode (LED) device has a shade, an active heat-dissipation device and an LED module. The shade has a cavity. The active heat-dissipation device is mounted in the cavity in the shade and has a cooling board, an evaporator, a condenser, a compressor, an expansion valve and a refrigerant. The evaporator, condenser, compressor and expansion valve connect to each other to form a loop. The refrigerant is set in the loop. The LED module is mounted to the active heat-dissipation device and has at least one LED. The active heat-dissipation device dissipates the heat from the LED and even lowers the temperature of the LED under ambient temperature,

The invention relates to a large field-of-view stray light PST (point source transmittance) testing method and a large field-of-view stray light PST testing device. The large field-of-view stray light PST testing device comprises a large dynamic range light source, a collimator, a clean room, a high-load turntable, an EMCCCD (electron multiplying charge coupled device) and a data acquisition and processing system, wherein the collimator is arranged on the path of emergent light of the large dynamic range light source; the EMCCD is arranged on the high-load turntable and is electrically connected with the data acquisition and processing system; the large dynamic range light source is electrically connected with the data acquisition and processing system; the high-load turntable is arranged on the path of emergent light after passing through the collimator; and the large dynamic range light source, the collimator, the high-load turntable, the EMCCD and the data acquisition and processing system are arranged in the clean room. The large field-of-view stray light PST testing method and the large field-of-view stray light PST testing device provided by the invention have the advantages that the stray light inhibiting ability of the lens hood of a astronautic camera can be effectively evaluated on the ground, the signal-to-noise ratio of the entire camera can be estimated, the astronautic camera can be guaranteed to pick up clear images after the astronautic camera is launched into the sky, the field of view is ultralarge and the accuracy is high.

A lamp unit of a vehicular headlamp includes a projection lens with an optical axis; a light source formed from a semiconductor light-emitting element; a first reflector that reflects light from the light source so as to condense such light on or near the optical axis; and a shade positioned between the light source and the projection lens so as to extend along the optical axis direction. The shade shields part of the light reflected by the first reflector. In the lamp unit of the vehicular headlamp, a shielding surface extends rearward from a front end of the shade, where the shade is positioned near a rearward focal point Rf of the projection lens. The shielding surfaces serve as a second reflector that reflects light from the first reflector toward the projection lens. In addition, a transparent portion is formed on part of the second reflector such that part of the light reflected by the first reflector passes downward of the rearward focal point of the projection lens and is then incident to the projection lens.