摘要:
A photometry device provides accurate photometry outputs over temperature by correcting light sensitivity variations of a light receiving element due to temperature variations. The photometry device includes the light receiving element, a light sensitivity detection device and a light sensitivity correction device. A correction formula is determined from the outputs of the light sensitivity corrections device generated at a standard condition and a condition other than the standard condition. The light sensitivity correction device corrects the outputs of the light receiving elements based on the correction formula.
摘要:
An exposure calculating apparatus includes a light-metering device, consisting of a light-metering elements corresponding to elementary areas obtained by dividing a field of a focusing optical system, for measuring a light intensity distribution in the field, a position of object detecting means for detecting a position of object in the field, a classifying means for changing a divisional pattern of light-metering areas in correspondence with the position of object, and classifying the light-metering elements of the light-metering device into a plurality of groups according to the divisional pattern, and a calculating device for calculating an exposure value by weighting the outputs from the plurality of light-metering elements in correspondence with the groups to which the light-metering elements belong, and supplying the exposure value to exposure control.
摘要:
A light metering calculating apparatus used in an AE camera is disclosed. The light metering calculating apparatus includes a light metering device for performing a light metering operation while dividing an objective field into a plurality of light metering regions, and outputting light metering signals corresponding to the respective light metering regions, and a grouping device for grouping the plurality of light metering regions based on the light metering signals from the light metering device, in such a manner that the adjacent light metering regions having similar light are grouped as one group.
摘要:
An exposure calculating apparatus for a camera has a plurality of processing devices for variously processing photometric outputs from regions of an object field divided into plural sections according to photographic conditions so as to determine the optimum exposure value according to the results of processes performed by the processing devices, the exposure calculating apparatus for a camera including: a device for setting a plurality of fuzzy rules in the form of membership functions corresponding to the processes performed by the plurality of processing devices; a device for calculating the grade of each of the fuzzy rules according to a plurality of values of photometry generated from photometric outputs from the plurality of regions; a device which selects fuzzy rules having the grades obtained by the calculations so as to calculate, according to the plurality of photometric outputs, exposure values obtained by the processes performed by the processing device which correspond to the selected fuzzy rules; and a device for determining the optimum exposure value by weighting, with the grade, each of the exposure values obtained by the processes performed by the processing devices.
摘要:
An exposure calculation device comprises: first composite photometered value calculation apparatus means for classifying areas of divisional photometering means to a first pattern and calculating a composite photometered value for each classified area based on the photometered values of the divisional photometering areas contained in each classified area; first exposure value calculation means for calculating a first exposure value based on the calculated composite photometered value; second composite photometered value calculation means for classifying the areas of the divisional photometering means to a second pattern and calculating a composite photometered value for each classified area based on the photometered values of the divisional photometering areas contained in each classified area; second exposure calculation means for calculating a second exposure value based on the calculated composite photometered value; contribution factor calculation means for calculating contribution factors of the first and second exposure values in accordance with a photographing condition; and third exposure value calculation means for combining the first exposure value and the second exposure value in accordance with the contribution factors calculated by the contribution factors calculation means to calculate an exposure value to control the exposure.
摘要:
A camera system has a device for recording an image of a photographing field in a recording medium such as a photographing negative color film, a photometering device for forming brightness information concerning the brightness of the photographing field, and a color information forming device for forming, in accordance with the brightness information, color information concerning the color of the light from a light source for illuminating the photographing field. The printing process after the deployment of the image is executed with a suitable control of the printing exposure light quantity in accordance with the color information so that a color print of a good quality can be obtained with a high reproducibility of the color.
摘要:
The present invention provides a solid electrolyte type of fuel cell of a planar type structure comprising a plurality of solid electrolyte plates, each being in the form of a flat plate and having a porous cathodic layer on one side and a porous anodic layer on the other side, which are laminated together through an interconnector plate provided in both its sides with grooves defining gas passages, wherein oxidizing agent and fuel gases are fed through said passages to the cathodic and anodic sides, thereby reducing the length of a current path running through regions of high resistance, increasing the degree of integration and improving reliability. By using heat-resistant parts for the interconnectors, cathodes and anodes, it is also possible to improve the resistance to oxidation and reduction as well as durability and obtain low resistance. it is further possible to obtain a fuel cell having satisfactory properties and capable of standing up to use over an extended period of time by using solid electrolyte for fuel cells which is obtained by sintering Y.sub.2 O.sub.3 -containing partially stabilized zirconia added with 5 to 20 % of alumina, has low resistance and high mechanical strength and is stable.
摘要:
A process for producing silicon nitride ceramic articles is disclosed, which includes the steps of preparing a mixed powder of silicon nitride and a sintering aid, shaping the mixed powder, sintering the shaped body, machining the sintered body in a desired shape, and then heating the machined sintered body in a temperature range from 550.degree. C. to 900.degree. C. in an oxidizing atmosphere. Alternatively, after the sintering, the sintered body is heated in a temperature range from 950.degree. C. to 1,400.degree. C. to crystallize an Si.sub.3 N.sub.4 grain boundary phase, the crystallized sintered body is machined into a desired shape, and the machined body is heated in a temperature range from 550.degree. C. to 900.degree. C. in an oxidizing atmosphere. Thereby, silicon nitride ceramic articles having high strength at room temperature can be obtained.
摘要翻译:公开了一种氮化硅陶瓷制品的制造方法,其包括以下步骤:制备氮化硅和烧结助剂的混合粉末,使混合粉末成形,烧结成形体,将烧结体加工成所需形状,然后加热 该加工的烧结体在氧化气氛中在550℃至900℃的温度范围内。 或者,烧结后,将烧结体在950℃〜1400℃的温度范围内加热,使Si 3 N 4晶界相结晶,将结晶烧结体加工成所需的形状,将加工体加热 在氧化气氛中在550℃至900℃的温度范围内。 因此,可以获得在室温下具有高强度的氮化硅陶瓷制品。
摘要:
A PWM generating unit may include a base duty setting register configured to store a base duty value that is set thereto, and a PWM generator to obtain a corrected duty value by correcting the base duty value based on first correction data and second correction data, and to generate a PWM signal according to the corrected duty value. The first correction data may be computed from a rotation period of a first rotational body, and the second correction data may be computed from a rotation period of a second rotational body.
摘要:
An image forming device has a full-color image formation mode to form a color image using color photoconductor drums and a monochrome image formation mode to form a monochrome image using a photoconductor drum. In the image forming device, a driving unit drives rotation of an intermediate transfer belt or a transfer transport belt. A control unit changes rotational speeds of the color photoconductors in a transition from the full-color image formation mode to the monochrome image formation mode to make a torque to the driving unit in the full-color image formation mode equal to a torque to the driving unit in the monochrome image formation mode. A separator unit separates the color photoconductors from the intermediate transfer belt or the transfer transport belt after the rotational speeds of the color photoconductors are changed by the control unit.