摘要:
Disclosed is a range finder system which includes a virtual image type first optical system for observing an object, and a second optical system for electronically capturing image of at least a part of the object. The range finder system is provided with an LCD (liquid crystal display) which displays the image captured by the second optical system. The image displayed on the liquid crystal display is directed to the virtual image type finder optical system, and the image as displayed on the LCD is combined with the image observed through the first optical system. Thus, two images are observed by a photographer as superimposed. A display controller controls the LCD so that the degree of coincidence of the superimposed images is varied in the direction of a base length based on an object distance information.
摘要:
An optical system comprising a photographing optical system, a light splitting element to split a light incident from an object, and a finder optical system to which the light split by the light splitting element is directed. A surface of the light splitting element is constituted as a ghost prevention surface that prevents light incident on the finder optical system from the eye side from being reflected, thereby preventing the ghost light (i.e., the light which affects the object image) from being incident on an image pickup surface. Alternatively, a wall surface of a casing of the optical system is employed as a ghost prevention surface.
摘要:
A zoom lens system having a high zoom ratio and a high aperture ratio includes a first lens group having a positive power, a second lens group having a negative power, a third lens group having a negative power, and a fourth lens group having a positive power. The second lens group has a magnification varying function and is moved during a zooming operation. The third lens group has a focus compensating function and is moved during the zooming operation. The fourth lens group has an image forming function and is not moved during the zooming operation.
摘要:
A thread groove type vacuum pump in which the gap between a rotor and a stator is not subjected to any influence of the rotor temperature and thus the pumping performance does not deteriorate during plasma combustion in a nuclear fusion reactor. The thread groove pumping portion is formed as a circular cone so that the expansion and contraction of the rotor occurs along the generatrix of the circular cone. The pump exhibits supreme pumping performance throughout the whole running mode of the vacuum pumping system of the nuclear fusion reactor because the gap between the rotor and the stator is kept constant despite changes of thermal expansion due to the temperature change of the rotor caused by the different gas loads.
摘要:
The composition of the present invention is excellent in compatibility, transparency and curability and give a cured coat of excellent gloss and of less smell, and cured products of excellent properties can be obtained by curing the composition.The present invention relates to an onium salt represented by the following formula (1): ##STR1## wherein Ar is a mono- to tetra-valent aromatic group, X is a bisphenylsulfonio group which may have a substituent, a is 1-4, b is 0 or 1-3, a+b is 1-4, n is 1-4, and Z is a halide represented by the following formula (3):MQ.sub.m (OH).sub.l (3)where M is a boron atom, a phosphorus atom, an arsenic atom or an antimony atom, Q is a halogen atom, m is 3-6, l is 0 or 1, and m+l is 4-6; a photopolymerization initiator containing the onium salt as an active ingredient; an energy ray-curable composition containing the initiator; and a cured product.
摘要:
An insulating member has an insulating layer in the form of a thin ceramic plate made of at least one of SiC, Si.sub.3 N.sub.4, AlN and Al.sub.2 O.sub.3 ad having a thickness not less than 0.1 mm and not more than 2.0 mm, and cushioning layers provided on both sides of the insulating layer through brazing alloy for relieving thermal stress. An electric part can be made of such an insulating member. The insulating member is disposed between a conductive substrate and a conductive member and brazed thereto.
摘要翻译:绝缘构件具有由SiC,Si 3 N 4,AlN和Al 2 O 3等中的至少一种制成的厚度不小于0.1mm且不大于2.0mm的薄陶瓷板形式的绝缘层,以及设置在两者上的缓冲层 通过用于缓解热应力的钎焊合金的绝缘层的侧面。 电气部件可以由这种绝缘构件制成。 绝缘构件设置在导电基板和导电构件之间并钎焊到其上。
摘要:
In a quadrupole mass spectrometer which includes four parallel rod electrodes between opposite pairs of which overlapping voltages.+-.(U+V cos .omega. t) are applied (where U: a continuous voltage and V cos .omega. t: a radio-frequency voltage) and which effects mass-analysis by an electric field formed within the four parallel rod electrodes, at least one parameter of U, V and .omega. has two different values, and the values are changed over to select the first stable region or the second stable region, the first stable region being nearest to the original point and the second stable region being next near to the original point on the a - q plane (where a:ordinate, q:abscissa) showing "stability diagram", and the ions being able to pass through the four parallel electrodes under the conditions of the first and second stable regions, where the variable a=8eU/mr.sub.O.sup.2 .omega..sup.2, q=4eV/mr.sub.O.sup.2 .omega..sup.2, U: level of DC voltage, V: peak of the radio-frequency voltage, e: charge of ion, m:mass of ion, r.sub.O : radius of an inscribed circle of the four parallel rod electrodes and.omega.: angular frequency of the radio frequency voltage.
摘要:
A method or joining ceramics comprising the steps: of preparing a ceramics body and another body to be connected with the ceramics body; of interposing a layer of ultra-fine particles having smaller size than the surface roughnesses of the contact surfaces of the ceramics body and the other body, the layer having larger thickness than the surface roughnesses, and the ultra-fine particles being reactive with the ceramics body and the other body and forming a reaction produce which has a strong bonding power to the ceramics body and the other body; and then of pressing and heating the piled composition of the ceramics body, other body and layer.
摘要:
The present invention relates to an ink ribbon for sublimation transfer type hard copy which is used to produce as a hard copy a still picture image such as a picture image taken by a video camera, a television picture image and so on. The ink ribbon for sublimation transfer type hard copy of this invention comprises a heat-resistant plastic film base or a plastic film base having formed thereon a heat-resistant treating layer and coating layer of sublimation dye formed on the plastic film base. According to this ink ribbon for sublimation transfer type hard copy, it is possible to protect the film base from being shrunk and producing a bubble spot therein due to heat generated upon transfer, etc. Accordingly, a quality of a transferred picture image can be improved.
摘要:
The present invention relates to a sublimation ink ribbon capable of printing on a printing paper a still picture image of various kinds of picture images such as a picture image shot by a video camera, a television picture image and the like. At least the surface of its sublimation ink layer is made of a layer containing a sublimation dye whose solubility relative to methyl ethyl ketone is not higher than 2.5g/100 ml or a layer in which a sublimation dye having a solubility higher than 2.5g/100 ml is mixed such that a ratio (P/B) of a weight P of the sublimation dye relative to a weight B of a binder is not higher than 0.5. Thus, it is possible to reduce the under layer soil characteristics.