30results about How to "Illuminance decrease" patented technology

A video magnifier includes a body including a base, a table on which an object to be read is placed, the table being disposed on the base, a video camera disposed over the table, an illumination lamp illuminating the object placed on the table and a pointer irradiating a part of the object photographed by the video camera, and a monitor television displaying a video image delivered from the video camera. In the video magnifier, in synchronization with irradiation of the photographed part of the object by the pointer, an illuminance of the illumination lamp is rendered lower than an illuminance of the pointer.

A vehicle headlamp is provided. The vehicle headlamp includes a light source which is configured to form an additional light distribution pattern which is formed above a cut-off line of a low-beam mode light distribution pattern; a vehicle detection device which is configured to detect a presence of a front running vehicle; a road position detection device which is configured to detect an existing area of a road ahead; and a control unit. The control unit acquires information from the vehicle detection device and the road position detection device and, when the existing area includes a non-detectable area which is outside of a detectable area of the vehicle detection device, controls the light source to reduce an illuminance of the additional light distribution pattern.

An information device for use with an engine of a vehicle includes a lighting device for providing information about a power position of the vehicle, an engine running detection device for detecting engine running, a gear shift position detection device for detecting gear shift position, and an illuminance control device for controlling illuminance of the lighting device. When a detection is made by the engine running detection device that the engine is running and by the gear shift position detection device that the gear shift position is other than in a P or N range, the illuminance control device reduces the illuminance of the lighting device compared with the illuminance of the lighting device when the gear shift position is in the P or N range.

There are provided (1) a sintered electrode for a cold cathode tube, comprising a cylindrical side wall part, a bottom part provided at one end of the side wall part, and an opening provided at another end of the side wall part, characterized in that the surface roughness (Sm) of the inner surface of the electrode is not more than 100 μm, (2) a cold cathode tube characterized by comprising: a hollow tubular light transparent bulb into which a discharge medium has been sealed; a fluorescent material layer provided on the inner wall surface of the tubular light transparent bulb; and a pair of the above sintered electrodes for a cold cathode tube provided respectively on both ends of the tubular light transparent bulb, and (3) a liquid crystal display device characterized by comprising: the above cold cathode tube; a light guide body disposed closely to the cold cathode tube; a reflector disposed on one surface side of the light guide body; and a liquid crystal display panel disposed on another surface side of the light guide body.According to the present invention, a cold cathode tube, which is low in operating voltage, can significantly suppress mercury consumption and has a prolonged service life, can be provided at low cost.

It is an object to provide a medical light source device capable of securing a long illumination time required to use in operations in the medical field, and the medical light source device that is worn on the body of an operator to apply light to a target portion of the medical treatment is to cause an illumination section 81 to be worn on the body of the operator with a holder 7, and is provided with an acceleration sensor 80 that detects a motion of the operator, where a control section 84 controls a supply of current from a power supply section to the illumination section 81, while controlling to reduce illuminance of the illumination section 81 or to halt the passage of current to the illumination section 81 when the acceleration sensor 80 detects acceleration of a predetermined value or more.

It is provided a lamp, particularly halogen lamp, for a headlight of a motor vehicle, comprising a light source (12) for emitting mainly white light, a mainly transparent envelope (14) encapsulating the light source (12) and a filter element (22) provided at the envelope (14), wherein the filter element (22) is adapted for deflecting visible light of a predefined wavelength interval such, that mainly blue light can be provided above a bright / dark-cutoff (28). Since the deflected bluish light is above the bright / dark-cutoff (28) an oncoming driver recognizes earlier the light. At the same time the oncoming driver is not blinded by the blue light above the bright / dark-cutoff (28), since not the whole emitted light (40) but only a smaller wavelength interval is directed above the bright / dark-cutoff (28).

Disclosed are: a lighting environment control facility capable of controlling light to be irradiated on cultivated crops to an optimum condition for the growth of the crops, thereby activating a natural defense of the crops against pests; a pest control method capable of determining whether or not to control pests of cultivated crops and controlling the pests on the basis of the determination; and an intensive cultivation method. The facility is used for pesticide-free cultivation, and includes a crop cultivation house which is formed of a light transmissive material and in which crops are cultivated, and a lighting control unit that controls the light to be irradiated upon the crops in the crop cultivation house. The lighting control unit is adapted to control spectral radiance (B1) of a wavelength range of blue light, spectral radiance (R1) of a wavelength range of red light, and spectral radiance (FR1) of a wavelength range of far-red light among the light to be irradiated on the crops that are cultivated in the crop cultivation house so as to be a predetermined condition.

An illumination apparatus includes a light source that emits light, a light guide member that has a base end surface onto which the light emitted from the light source is incident and a tip surface which is an opposite end surface to the base end surface, and guides the light from the base end surface towards the tip surface, and an attachment member that has a light shield property and an opening corresponding to a shape of the light guide member and accommodates the light guide member in the opening. The light guide member is curved so that a distance between the light guide member and the opening is gradually increased towards the tip surface-side in a longitudinal direction of the light guide member.

A Fresnel lens includes a Fresnel surface that includes effective Fresnel surfaces allowing imaging rays to pass through. Two adjacent effective Fresnel surfaces are connected through a non-effective Fresnel surface. On a cross-section including an optical axis of the Fresnel lens, a draft angle is between a reference line and a connecting straight line between one end of each non-effective Fresnel surface located at a tooth peak of the Fresnel lens and the other end of each non-effective Fresnel surface located at a tooth valley of the Fresnel lens. The optical axis coincides with the cross-section. The reference line is parallel to the optical axis and passes through the end of the effective Fresnel surface located at the tooth peak of the Fresnel lens. The draft angles each smaller than 90 degrees include first, second, third, fourth, and fifth draft angles which gradually increase radially outward from the optical axis.

The invention relates to an optical inspecting system designed to image an object to be inspected with a variable imaging scale, comprising a variation system for imaging the object into infinity, a lens group downstream of the variation system for imaging the object from infinity into the image plane of the whole system, and a light source for generating light in order to illuminate the object, means for imaging the illuminating light into the exit pupil of the variation system being provided in the airspace between the fifth lens group and the subsequent lens group. Of the five lens groups of the variation system, the first, second, and fourth lens groups, when seen in the imaging direction, are arranged in a movable manner in the direction of the optical axis, whereas the third and fifth lens groups are not movable.

Sights of the present disclosure comprise a housing supporting an optical sighting element, such as one or more lenses or iron sights. A first lateral side of the housing has a laterally-extending protrusion and a lead-in portion forward of the laterally-extending portion. In some arrangements the lead-in portion is laterally-inward of an outermost surface of the laterally-extending protrusion and has a surface roughness of less than 50 μm. In some instances, the laterally-extending protrusion has a width of at least 1 mm and the lead-in portion has a length of at least five times the width of the laterally-extending protrusion.

A radiation image conversion panel comprising a phosphor sheet having a stimulable phosphor layer and a protective layer provided so as to cover the surface of the phosphor layer, wherein mean slope Δa of an outer surface of the protective layer not adjacent with the phosphor layer is from 0.01 to 0.1 and the surface roughness Ra in μm of the inner side or the phosphor sheet side of the protective layer is 0.05 μm to 0.45 μm, and the stimulable phosphor layer is provided by a coating method.