Abstract: In an optical element (B1) prepared by integrally forming, on surfaces of a transparent member, a refracting surface (R2) for receiving a light beam, a plurality of reflecting surfaces (R3, R4, R5) with curvatures, and a refracting surface (R6) for outputting the light beam reflected by the plurality of reflecting surfaces, a reference portion (7) for defining the position of the optical element in a predetermined direction with respect to a Y′-Z′ plane including an incident reference axis (5) and an exit reference axis (5) of at least one reflecting surface of the optical element (B1) is formed on the optical element.

Abstract: In an optical element (B1) prepared by integrally forming, on surfaces of a transparent member, a refracting surface (R2) for receiving a light beam, a plurality of reflecting surfaces (R3, R4, R5) with curvatures, and a refracting surface (R6) for outputting the light beam reflected by the plurality of reflecting surfaces, a reference portion (7) for defining the position of the optical element in a predetermined direction with respect to a Y′-Z′ plane including an incident reference axis (5) and an exit reference axis (5) of at least one reflecting surface of the optical element (B1) is formed on the optical element.

Abstract: In an optical element composed of an entrance refractive surface, an exit refractive surface and a plurality of internal reflective surfaces provided between the entrance refractive surface and the exit refractive surface, a structure is provided for enabling the optical element to turn around a reference axis of the entrance refractive surface. Further, in such an optical element, an diaphragm member is disposed adjacent to the entrance refractive surface and is arranged to vary an aperture diameter thereof according to a movement thereof.

Abstract: In an optical element (B1) prepared by integrally forming, on surfaces of a transparent member, a refracting surface (R2) for receiving a light beam, a plurality of reflecting surfaces (R3, R4, R5) with curvatures, and a refracting surface (R6) for outputting the light beam reflected by the plurality of reflecting surfaces, a reference portion (7) for defining the position of the optical element in a predetermined direction with respect to a Y′-Z′ plane including an incident reference axis (5) and an exit reference axis (5) of at least one reflecting surface of the optical element (B1) is formed on the optical element.

Abstract: An optical element is provided that allows accurate measurement of the shapes of the element and its surfaces which light is bound to strike, a jig is provided for holding the optical element, and an apparatus such as an image pickup apparatus or display apparatus is provided which includes the optical element. This optical element is characterized in that it includes surfaces which light is bound to strike and reference portions indicating the reference positions of the shapes of the surfaces, and the reference portions have curved surfaces defining points corresponding to the reference positions.

Abstract: In an optical element (B1) prepared by integrally forming, on surfaces of a transparent member, a refracting surface (R2) for receiving a light beam, a plurality of reflecting surfaces (R3, R4, R5) with curvatures, and a refracting surface (R6) for outputting the light beam reflected by the plurality of reflecting surfaces, a reference portion (7) for defining the position of the optical element in a predetermined direction with respect to a Y′-Z′ plane including an incident reference axis (5) and an exit reference axis (5) of at least one reflecting surface of the optical element (B1) is formed on the optical element.

Abstract: In an optical element (B1) prepared by integrally forming, on surfaces of a transparent member, a refracting surface (R2) for receiving a light beam, a plurality of reflecting surfaces (R3, R4, R5) with curvatures, and a refracting surface (R6) for outputting the light beam reflected by the plurality of reflecting surfaces, a reference portion (7) for defining the position of the optical element in a predetermined direction with respect to a Y′-Z′ plane including an incident reference axis (5) and an exit reference axis (5) of at least one reflecting surface of the optical element (B1) is formed on the optical element.

Abstract: A TV conference system, which enables a conference to be conducted between remotely located points, includes a plurality of terminal equipments disposed in the remotely located points for enabling information, such as image information and sound information, to be communicated from one of the remotely located points to another in real time, a controlling circuit for enabling the terminal equipment disposed in one of the remotely located points to be controlled from another, and an operation restricting circuit for restricting execution of a predetermined operation of the terminal equipment which can be operated under remote control. Accordingly, there is provided a TV conference system including an improvement which can provide good operability to a conference participant. In addition, the operability of the system is improved to a further extent by improving an image input apparatus.

Abstract: A folding mechanism portion for folding leg portions (8, 11) along a support portion (5) of an image input apparatus (1) is provided in a base portion (7). This mechanism is constituted by two legs which extend from the base portion substantially in the shape of "L" within a horizontal plane when used, and can be folded to become parallel to the support portion (5) when not used. A pan base (2) on the upper end of the support portion (5) has an electrical connector and can be detached.

Abstract: A video conference system includes a detecting circuit for detecting an amount corresponding to a movement delay, if the movement delay occurs in a terminal device prepared at a second point when the terminal device is made to perform the movement, in accordance with an instruction sent from the first point, and a memory circuit for storing the amount corresponding to the movement delay detected by the detecting circuit. The device is made to move in a direction opposite to the direction in which the device has been made to move, on the basis of the amount stored in the memory circuit.

Abstract: A TV conference system, which enables a conference to be conducted between remotely located points, includes a plurality of terminal equipment disposed in the remotely located points for enabling information, such as image information and sound information, to be communicated from one of the remotely located points to another in real time, a controlling circuit for enabling the terminal equipment disposed in one of the remotely located points to be controlled from another, and an operation restricting circuit for restricting execution of a predetermined operation of the terminal equipment which can be operated under remote control. Accordingly, there is provided a TV conference system including an improvement which can provide good operability to a conference participant. In addition, the operability of the system is improved to a further extent by improving an image input apparatus.

Abstract: A disc mounting apparatus arranged to handle a flexible disc having a center core which is attached at a central portion of the disc and is provided with an engaging hole, the apparatus including a spindle engageable with the engaging hole of the center core of the disc, the spindle having a flange portion for receiving thereon the center core, the spindle rotating the disc, presser member for pressing the center core of the disc against the flange portion of the spindle, the presser member having at least two pressing portions arranged so that only the at least two pressing portions act on respective almost diametrically opposite portions on an annular surface of the center core, and so that a remaining portion of the presser member does not contact the center core, and an operation mechanism for operating the presser member to press the center core of the disc through the pressing portions, the operating mechanism operating in association with the position of the disc relative to the spindle, increasing the

Abstract: A sheet sticker apparatus includes a pair of bases for supporting sheets, at least one of which has an adhesive thereon. One of the bases can be overlaid on the other. The apparatus also includes a positioning device for correctly positioning the sheets on the respective bases; an attraction device for at least one of the bases for attracting the sheet positioned by the positioning device; and an aligning device for aligning the bases relative to each other when the bases are overlaid with each other.

Abstract: A recording apparatus comprises a recording head for recording an image on a sheet positioned at a predetermined recording position, a conveying device for conveying the sheet so that the sheet passes through the recording position, and a supporting device for supporting the conveying device in such a manner as to shift the conveying device in a first direction transverse to a sheet feeding direction and separating from the recording head and then to shift the conveying device in a second direction in the sheet feeding direction.

Abstract: A recording or reproducing apparatus for recording or reproducing information by relatively moving a head and a sheet recording medium is disclosed. The recording or reproducing apparatus includes a stabilizing member disposed around the head and arranged to generate pressure which brings the recording medium into contact with the head in accordance with the rotation of the recording medium.

Abstract: Disclosed is a head shifting apparatus for shifting a head relative to a recording medium, which comprises a shifting mechanism for shifting the head stepwise, detecting means for detecting when the head reaches a predetermined reference position and control means for controlling the shifting mechanism in such a manner that the head is shifted in a first shifting mode where the head is shifted on the basis of a predetermined first unit increment of shifting step until the head reaches the reference position, and after that when to perform normal recording or reproducing, the head is shifted in a second shifting mode where the basis is shifted on the basis of a predetermined second unit increment of shifting step larger than the first unit increment of shifting step.

Abstract: A cutting apparatus having a holding member for holding a sheet; a plurality of cutter member for cutting the sheet held by the holding member; and a shifting member engaged by the plurality of cutting member, for shifting the plurality of cutting member in parallel with each other. The shifting member is so designed that it can shift the cutting means without aligning them perpendicular to a cutting direction during the cutting of the sheet.

Abstract: An apparatus arranged to use a flexible magnetic disc housed in a cassette and having a center core provided with an engaging hole, including a disc rotating spindle having a flange and engageable with the hole at the center core of the disc, a cassette holder movable between a first position for receiving the cassette and a second position for positioning the received cassette at a predetermined position relative to the spindle, a pressing member for pressing the engaging portion of the disc against the flange of the spindle, and a control mechanism for operating the pressing member and thereafter disabling the pressing member during the movement of the cassette holder from its first to its second position.

Abstract: An apparatus arranged to use a flexible magnetic disc housed in a cassette and having a center core provided with an engaging hole, includes a disc rotating spindle having a flange and engageable with the hole at the center core of the disc, a cassette holder movable between a first position for receiving the cassette and a second position for positioning the received cassette at a predetermined position relative to the spindle, a pressing member for pressing the engaging portion of the disc against the flange of the spindle, and a control mechanism for operating the pressing member and thereafter disabling the pressing member during the movement of the cassette holder from its first to its second position.

Abstract: A recording and/or reproducing apparatus using a flexible magnetic disc having a center core or hub which is provided with at least one indication member for indicating rotation phase of the disc, comprises a pressing member for pressing the center core of the disc to mount the same on a drive spindle and a detection member for detecting the indication member on the center core of the disc at a predetermined position, wherein the pressing member is formed or arranged so that it never interferes with the detection member.