Abstract: A zoom lens barrel wherein its cam ring has three sets of three cam grooves for advancing or retracting a first group frame, a focus frame and third group frame. The three cam grooves include a cam follower introducing groove connected to ends of two cam grooves for the focus frame and a third group frame and a joint groove for joining two cam grooves for the first group frame and the focus frame. When inserting a cam follower of the first group frame into the cam groove, after it is inserted into the introducing groove, it is passed through the cam groove for the focus frame and then, passed through the joint groove and fit to the cam groove for the first group frame. Further, when inserting the cam followers of the focus frame and third group frame into the cam groove, after it is inserted from the introducing groove, it can be fit to the focus frame and third group frame separately.

Abstract: A lens barrel includes a first group frame supported by two first guide shafts and a second guide shaft such that it is capable of being advanced or retracted, a focus frame, a focus frame holding portion, and a third group frame. The first guide shafts are bonded and supported by the focus holding frame in parallel such that both ends thereof are exposed. The first group frame and the third group frame are supported slidably by both end portions. Further, the second guide shaft supports the focus frame slidably. An end of the second guide shaft is supported through a short fitting length while it is not fixed to the first group frame and the other end thereof is supported slidably by the third group frame through a short fitting length. Therefore, in this lens barrel, the accuracy in advancement and retraction of respective members is excellent and an efficiency of storage space is excellent thereby contributing to reduction of the size, achieving compactness.

Abstract: A solar cell includes a first semiconductor layer that is p-type, and a second semiconductor layer that is n-type formed over the first semiconductor layer. The solar cell includes a layer A made of a semiconductor different from the first semiconductor layer and the second semiconductor layer or an insulator between the first semiconductor layer and the second semiconductor layer. The band gap Eg1 of the first semiconductor layer and the band gap Eg2 of the second semiconductor layer satisfy the relationship Eg1<Eg2. The electron affinity &khgr;1 (eV) of the first semiconductor layer and the electron affinity &khgr;2 (eV) of the second semiconductor layer satisfy the relationship 0≦(&khgr;1−&khgr;2)<0.5, and the average layer thickness of the layer A is 1 nm or more and 20 nm or less.

Abstract: This invention provides a compound of the following formula: or the pharmaceutically acceptable salts thereof wherein A is C 1-6 alkylene or —NR1—; Z is C(═L)R2, or SO2R3; U is CH or N; W and Y are independently selected from —CH2—, O, S and —N—R1; m is 1, 2 or 3; q and r are independently 0, 1 or 2; X is independently selected from halogen, C1-4 alkyl, halo-substituted C1-4 alkyl, hydroxy, C1-4 alkoxy, halo-substituted C1-4 alkoxy or the like; n is 1 or 2; L is oxygen or sulfur; R1 is hydrogen or C1-4 alkyl; R2 is hydroxy, C1-6alkyl, halo-substituted C1-6 alkyl, C1-6 alkoxy, halo-substituted C1-6 alkoxy, C3-7 cycloalkoxy, C1-4 alkyl(C3-7 cycloalkoxy), —NR4R5 or the like; R3 is C1-6 alkyl or halo-substituted C1-6 alkyl; and R4 and R5 are independently selected from hydrogen, C1-6 alkyl and halo-substituted C1-6alkyl.

Abstract: A zoom lens barrel that performs zooming by moving a plurality of lens groups, which constitute a photo-taking optical system, by interlocking the lens group with each other. The zoom lens barrel includes a first frame supporting a first lens group and a second frame supporting a second lens group. A cam tube supports both the first frame and the second frame so that the frames can relatively move in the direction of the optical axis of the optical system. A drive cam is provided in the cam tube and has a cam that has a first cam region for moving the first frame in the direction of the optical axis and a second cam region for moving the second frame in the direction of the optical axis. The drive cam is formed so that the first frame and the second frame may commonly use partial regions of the first cam region and the second cam region at the time of performing the zooming.

Abstract: The present invention includes a substrate, a lower electrode film, a p-type semiconductor layer (a second semiconductor layer), an n-type semiconductor layer (a first semiconductor layer), an upper electrode film and an anti-reflection film, which are stacked sequentially on the substrate in this order, and an interconnection electrode formed on the upper electrode film. The first semiconductor layer is free from Cd, and the second semiconductor layer is a light-absorption layer. The band gap Eg1 of the first semiconductor layer and the band gap Eg2 of the second semiconductor layer satisfy a relationship: Eg1>Eg2. The electron affinity &khgr;1 (eV) of the first semiconductor layer and an electron affinity &khgr;2 (eV) of the second semiconductor layer satisfy a relationship: 0≦(&khgr;2−&khgr;1)<0.5.

Abstract: This lens barrel comprises a first group frame supported by two first guide shafts and a second guide shaft such that it is capable of being advanced or retracted, a focus frame, a focus frame holding portion, and a third group frame. The first guide shafts are bonded and supported by the focus holding frame in parallel such that both ends thereof are exposed. The first group frame and the third group frame are supported slidably by both end portions. Further, the second guide shaft supports the focus frame slidably. An end of the second guide shaft is supported through a short fitting length while it is not fixed to the first group frame and the other end thereof is supported slidably by the third group frame through a short fitting length. Therefore, in this lens barrel, the accuracy in advancement and retraction of respective members is excellent and an efficiency of storage space is excellent thereby contributing to reduction of the size, achieving compactness.

Abstract: In this zoom lens barrel, its cam ring has three sets of three cam grooves for advancing or retracting a first group frame, a focus frame and third group frame. The three cam grooves include a cam follower introducing groove connected to ends of two cam grooves for the focus frame and third group frame and a joint groove for joining two cam grooves for the first group frame and the focus frame. When inserting a cam follower of the first group frame into the cam groove, after it is inserted into the introducing groove, it is passed through the cam groove for the focus frame and then, passed through the joint groove and fit to the cam groove for the first group frame. Further, when inserting the cam followers of the focus frame and third group frame into the cam groove, after it is inserted from the introducing groove, it can be fit to the focus frame and third group frame separately.

Abstract: In a liquid infusion apparatus, an incremental linear encoder is arranged along the feeding shaft direction of the liquid infusion apparatus to directly monitor the movement and position of a carriage part which applies an action to a plunger. A detecting sensor is provided at a starting point of a remaining liquid quantity small region to recognize the absolute position at said region by using feed-back pulses from said encoder. A pressing device for pressing a flange of the plunger to a plunger receiving portion of a slider by holding arms is provided. A pressure sensor is arranged between said plunger receiving portion and the slider to detect a negative pressure applied to the plunger in such a manner that the other operation states of pressure are detected based on a detected value of pressure at which the flange is pressed to the plunger receiving portion.

Abstract: A rectilinear barrel of a camera supporting a lens group in a manner that the lens group is movable along a rectilinear slot in the direction of its optical axis, a cam ring which has on its circumference a rib with a cutout portion and which rotates to drive the lens group in the direction of the optical axis, a threaded driving shaft for moving the rectilinear barrel between an imaging position and a retracted position, a zoom gear for rotating the cam ring when the rectilinear barrel is at the imaging position, and a locking tab for allowing the rectilinear barrel to move by means of the threaded driving shaft by aligning itself with the cutout portion and for locking the movement of the cam ring, and thus, the rectilinear barrel by aligning itself with the rib.

Abstract: A zoom lens barrel is a lens barrel having a plurality of lens groups that change intervals in the direction of an optical axis at the time of a zooming operation and move in one-piece toward the optical axis at the time of a focusing operation thereby fixing the mutual intervals in the direction of the optical axis. Furthermore, the zoom lens barrel drives a second group lens frame toward the optical axis via a cam follower by a three-dimensional cam that rotates around the optical axis at the time of the zooming operation and moves toward the optical axis at the time of the focusing operation to perform zooming or focusing. According to this zoom lens barrel, it becomes possible to make the radial size small and further to easily maintain good optical performance.

Abstract: A zoom lens barrel that performs zooming by moving a plurality of lens groups, which constitute a photo-taking optical system, by interlocking the lens groups with each other. The zoom lens barrel includes a first frame supporting a first lens group, and a second frame supporting a second lens. A cam tube supports both the first frame and the second so that the frames can relatively move in the direction of the optical axis of the optical system. A drive cam is provided in the cam tube and has a cam that has a first cam region for moving the first frame in the direction of the optical axis and a second cam region for moving the second frame in the direction of the optical axis. The drive cam is formed so that the first and the second frame may commonly use partial regions of the first cam region and the second cam region at the time of performing the zooming.

Abstract: A recording composite sheet capable of being separated into two sheet sections comprises a first sheet section (2) having a first recording layer (5) formed on a front surface of a first support sheet (4) and a second sheet section (3) comprising a second support sheet (7) and bonded to the first sheet sections to an extent that the bonded sheet sections are separable from each other by hand.

Abstract: A semiconductor thin film comprises an n-type compound semiconductor layer including at least one element from each of groups Ib, IIIb, VIb and II. A solar cell using this semiconductor thin film comprises a substrate and a rear electrode, a p-type compound semiconductor layer, an n-type compound semiconductor layer, an n-type semiconductor layer, a window layer, and a transparent conductive film, formed in this order on the substrate. The n-type compound semiconductor layer including at least one element from each of groups Ib, IIIb, VIb and II has a high carrier density.

Abstract: A lens barrel includes a fixed frame, a plurality of lens groups disposed inside the fixed frame movably along an optical axis relative to the fixed frame, at least three lens holding frames holding at least one lens group, a cam frame having bottomed can grooves coupled with the inner circumference of the fixed frame through cams, bottomed can grooves crossing each other coupled with the lens holding frames through cams and a bottomed cam groove which is discontinued at one end surface and continued on another end surface, a key regulating rotation of the lens holding frames about an optical axis relative to the fixed frame as well as reinforcing the strength of the lens barrel, a cam mechanism between the cam frame and the lens holding frames for moving the lens holding frames along the optical axis by rotation of the cam frame about the optical axis relative to the fixed frame, an internal gear on the inner circumference of the cam frame, a pinion gear transmitting drive force from a drive source to the in

Abstract: A lens barrel of the present invention includes a fixed frame, a plurality of lens groups disposed on the inner circumference of the fixed frame movably along an optical axis direction with respect to the fixed frame, at least three lens holding frames for holding at least one lens group of a plurality of the lens groups, a cam frame having bottomed cam grooves to be coupled with the inner circumference of the fixed frame through cams, bottomed cam grooves across each other to be coupled with the lens holding frames through cams and a bottomed cam groove which is discontinued on one end surface and continued from the other end surface, a key member for regulating the rotation of the lens holding frames about an optical axis with respect to the fixed frame as well as reinforcing the strength of the entire lens barrel, a cam mechanism interposed between the cam frame and the lens holding frames for moving the lens holding frames along the optical axis direction by the rotation of the cam frame about the optical

Abstract: A lens barrel has a plurality of moving frames that move along the optical axis of lenses. The lens barrel comprises a first moving frame, a second moving frame, and an interlocking unit. The first moving frame moves along the optical axis. The second moving frame moves along the optical axis within a range smaller than the movable range of the first moving frame. The interlocking unit formed on the first moving frame interlocks the second moving frame with the first moving frame and moves the second moving frame responsively to the movement along the optical axis made by the first moving frame. The movable range of the first moving frame falls into a range of interlocking within which the second moving frame is moved interlocked with the first moving frame, and a range of non-interlocking within which the second moving frame is not interlocked with the first moving frame. Consequently, a moving mechanism for moving the plurality of lens frames can be simplified.

Abstract: A zoom lens barrel is intended to ensure precision in dimensions for a cam groove and contribute to realization of a compact and lightweight design and reduction in cost of manufacturing. The zoom lens barrel has a cam cylinder that is a cam member having a first cam groove and second cam groove, and a lens frame having a first cam pin to be engaged with the first cam groove, and a second cam pin to be engaged with the second cam groove. When the first cam pin formed on the lens frame moves along the first cam groove, the lens frame moves over a power varying zone that is a first zone in the direction of an optical axis. When the second cam pin formed on the lens frame moves along the second cam groove, the lens frame moves over a collapsing zone that is a second zone in the direction of the optical axis.

Abstract: A method of producing a thermal transfer image recording sheet is provided including the steps (a) bonding a surface of a substrate sheet to a plastic film through a layer of a polymeric binder having a glass transition temperature of 50.degree. C. or less to form a first laminate; (b) heat setting the first laminate under pressure at a temperature higher than the glass transition temperature of the polymeric binder layer to remove stress from the finished thermal transfer image recording sheet; and (c) forming a thermal transfer image-receiving layer on an exposed surface of the plastic film to produce the thermal transfer image recording sheet. A method of producing a thermal transfer image recording sheet is also provided including the steps (a) bonding a surface of a substrate sheet to a plastic film through a layer of a polymeric binder having a glass transition temperature of 50.degree. C.

Abstract: An object of the present invention is to provide a safe method of commercially producing optically active aminoalcohol derivatives, which serve as intermediates for the synthesis of medicinal chemicals such as the immunopotentiating anticancer agent bestatin, in a simple and easy manner in high yields and with high levels of selectivity.The present invention consists in a method of producing 3-amino-1-nitro-4-phenyl-2-butanol derivatives of the general formula (1) ##STR1## wherein R.sup.1 and R.sup.2 each independently represents a hydrogen atom or an amino group protecting group, and a method of producing 3-amino-2-hydroxy-4-phenylbutyric acid derivatives derivable therefrom.