摘要:
A light-controlling variable aperture incorporates a resilient opaque tube positioned along the optical axis. When the resilient opaque tube is twisted, a constricting circular aperture forms a circular iris in an intermediate portion thereof. The circular iris is constricted to various sizes according to the degree of twisting of the tube to control the amount of light passing therethrough.
摘要:
A disk driving apparatus comprising a holder having an insertion opening end through which a jacket having a disk therein is inserted and discharged, a cover from which the holder hangs, a body having a motor for driving the disk in the jacket, and an opening and closing mechanism provided between the body and the cover for opening and closing the cover. The opening and closing mechanism includes a four-lever linkage having first and second levers which are pivoted at their one end to the body by respective pivot shafts and at the opposite ends to the cover by respective pivot shafts.
摘要:
A pad support device for supporting a pad member which is to be pressed against a disk member accomodated in a jacket. A movable member is moved toward and away from the disk member. A plate member carries the pad member, and a leaf spring is formed such that the leaf spring has at least two openings. A first portion of the leaf spring between the at-least-two openings is bent in one direction out of the plane of the surface thereof to be substantially arch-shaped while at-least-two second portions of the leaf spring are bent in a direction in which the first portion is bent to also be substantially arch-shaped. The first portion is secured to one of the movable member and the plate member, while the second portions are secured to the other of the movable member and the plate member, whereby the plate member is resiliently suspended from the movable member.
摘要:
The hand strap of a still video camera is arranged in such a manner that an accessory is detachably provided on the hand strap by means of a connecting member. Thus, it becomes possible to prevent the accessory from being lost. Further, the hand strap, by accommodating a connection cord for connecting the still video camera and the accessory within the hand strap, prevents the connection cord from obstructing the operations of the still video camera.
摘要:
A battery cover opening/closing device which prevents a battery from being opened when the power switch is in the on position and prevents the switch from being turned on when the cover is not completely closed. The device includes a cover opening member (21), a power switch manipulator (51) for turning on and off the power switch for the battery and a safety mechanism for enabling the opening operation of the cover opening member (21) only when the power switch manipulator (51) is in the position of turning off the power switch. The safety mechanism comprises a slide-locking plate (14) having an opening/closing hole means (20) in which a bar coupled to the member integrally therewith is fitted. The opening/closing hole means includes an entry hindrance hole (20b) which does not allow the member (21) to be pressed to open the cover when the manipulator is in the position of turning on the power switch and an entry allowance hole (20a) which is continuous to the entrance hindrance hole (20b) and allows the member (21 ) to be pressed to open the cover when the manipulator is in the position of turning off the switch.
摘要:
A heat-sensitive color developable composition contains a color developing dye, an acidic material capable of developing the dye by heating and epoxy group-modified polyvinyl alcohol.
摘要:
A process for the production of aromatic nitrile having the formula (I) ##STR1## wherein X represents a chlorine, bromine, iodine or fluorine atom and n is 1 or 2,By contacting aromatic compound having the formula (II) ##STR2## wherein X and n are as defined above, with ammonia and molecular oxygen in the vapor phase in the presence of a catalyst having the following composition:V.sub.a P.sub.b A.sub.c O.sub.dwherein A denotes at least one element selected from the group consisting of chromium, manganese, iron, cobalt, nickel and tin, the subscripts a, b, c, and d respectively denote the numbers of vanadium, phosphorus, A and oxygen atoms, and wherein a is 1, b is 0.1 to 3, c is 0 to 2 and d is a number determined by the valences of other elements.
摘要:
Provided is a scanning laser ophthalmoscope capable of accurately superposing multiple photographed images. The scanning laser ophthalmoscope comprises an image generating unit that generates first images based on the light reflected from first laser light and second images based on the light reflected from second laser light. An associating unit associates the first images and the second images based on the first laser light and the second laser light parallelly scanned by the scanning unit. A displacement calculating unit calculates displacements between images regarding multiple first images. The position matching unit matches the positions of multiple second images based on the processing results from the associating unit and the displacements. The superposing unit superposes the multiple second images that have undergone the position matching. The display unit displays an image obtained by superposing the multiple second images.
摘要:
A fundus oculi observing device 1 specifies a characteristic site of a fundus oculi Ef depicted in tomographic images of the fundus oculi Ef and, based on the position of the characteristic site within frames FH and FV of the tomographic images, changes a target position of a signal light LS so that the characteristic site is depicted in the center positions within the frames FH and FV and executes a main measurement, thereby forming a tomographic image and/or a three-dimensional image of the fundus oculi Ef.
摘要:
A surface emitting laser is formed of a composition in which bandgap energy of layers from immediately above a current confinement layer to a second conductivity type contact layer is reduced towards the second conductivity type contact layer in a stacking direction, and a composition in which bandgap energy of layers from immediately below the current confinement layer to a first conductivity type contact layer is reduced towards the first conductivity type contact layer in a stacking direction while bypassing a quantum well layer or a quantum dot of an active layer, and includes a second conductivity type cladding layer including a material for reducing the mobility of carriers.