30results about How to "Illuminance decrease" patented technology

An object of the present invention is to provide an image display technology with which high contrast can be stably obtained. In order to achieve the above object, the present invention changes the gain of a digital luminance signal by feeding back information on maximum and average luminance levels of the luminance signal, adjusts image contrast, and in accordance with the average luminance level detected from the feedback system, controls the illuminance of the backlight applied to a display unit. The control increases the illuminance of the backlight when the detected average luminance level is higher than the upper-limit value of a previously set reference range, and reduces the illuminance when the detected average luminance level is lower than the lower-limit value of the reference range.

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 automatic driving system includes: an interior light configured to illuminate a vehicle compartment of a vehicle; an interior light control unit configured to control the interior light; and a driving control unit configured to perform automatic driving control of automatically driving the vehicle, end the automatic driving control when the automatic driving control is being performed, and switch driving of the vehicle from automatic driving to manual driving. The interior light control unit is configured to perform, when the interior light is lighted while the automatic driving control is being performed, dimming control of decreasing an illuminance of the interior light before the driving control unit switches the driving of the vehicle from the automatic driving to the manual driving.

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 lighting system for an indoor room or space is designed to provide a diffuse, glare free source that illuminates the room from the cornice, or a similar location around the join between the walls and ceiling. This may be achieved via a direct source of illumination at the cornice location, or by projecting illumination from a remote source. The lighting system is further designed to allow for illumination of certain areas of the cornice, and hence the room, whilst leaving other parts dark. There are multiple advantages of an adaptable system such as this, but in particular the lighting conditions can be adjusted for optimum lighting levels, for example dimming selected areas when viewing a television.

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 the average slant angle Δa of the surface roughness of the 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 phophor 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.

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.

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.

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.

There is provided a lighting device using a wavelength conversion sheet used in a liquid crystal display or the like, and an object of the invention is to provide a lighting device having satisfactory durability. The object is achieved by a lighting device including: a point light source; a wavelength conversion sheet; and a light intensity reduction member arranged between the point light source and the wavelength conversion layer, in which the light intensity reduction member reduces peak illuminance of light that is applied by the point light source on a light incident surface of a wavelength conversion sheet by 10% to 80%, and absorbance of light having a wavelength of 450 nm measured by using an integrating sphere is less than 5%.

The present invention relates to a method in which: a photoreactive composition layer is formed on a support while conveying the support in one direction, the support is turned around at least once so that the support before turnaround faces the support after turnaround by conveying the support in the direction opposite the foregoing one direction to make a conveying route of the support multistage traveling, and in the course of multistage traveling, the support is turned around while keeping contact with three or more conveying rollers at least during the first turnaround, and light is emitted toward the support from a light irradiator to cause photopolymerization of the photoreactive composition layer formed on the support.

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).

A microscopy method is for producing an electronic image of an object, wherein the object is imaged with an adjustable optical imaging scale on an image detector. The method includes: selecting a parameter for the electronic image, wherein the parameter can be influenced by the optical imaging scale and differs from the image field dimensions, and setting a setpoint value range for the parameter, setting a total imaging scale for the electronic image, wherein adjusting or controlling the parameter of the electronic image is implemented such that, at the same time, the parameter of the electronic image lies in the specified setpoint value range with a tolerance and the set total imaging scale is obtained, wherein the optical imaging scale forms a basis for a manipulated variable of the adjustment or closed-loop control and a digital image magnification is carried out on the basis of the set total imaging scale.