摘要:
An optical module 1 comprises a first optical element F1, a first light receiving subassembly PD1, a second optical element F2, a second light receiving subassembly PD2, a light emitting subassembly LD3 for generating light, and a light transmitting part 3 optically coupled to the first optical element. The light emitting subassembly LD3, the first optical element F1, the second optical element F2 and the first light receiving subassembly PD1 are arranged along a predetermined plane S1. The light emitting subassembly LD3, the first optical element F1, the second optical element F2, and the second light receiving subassembly PD2 are arranged along another predetermined plane S2. The predetermined plane S1 intersects at a predetermined angle with the other predetermined plane S2.
摘要:
An optical transmitter-receiver module has a structure in which a light-emitting device and a light-receiving device are coupled with an optical fiber through a wavelength-selecting filter. In the above structure, part of the lightwave of the light-emitting device is reflected from the wavelength-selecting filter, is reflected again from a wall in the opposite direction, and enters the light-receiving device, causing optical crosstalk between the light-emitting device and the light-receiving device. An object of the invention is to prevent the crosstalk between the light-emitting device and the light-receiving device. An inverted conical hole is provided in a wall at which the lightwave of the light-emitting device arrives after it is reflected from the wavelength selecting filter. The hole has a size larger than the spread of the reflected lightwave of the light-emitting device. The hole has a vertical angle of 72 to 80 degrees or 100 to 160 degrees.
摘要:
A jointing holder for an optical module for single-fiber bidirectional communication comprises a unitarily structured cylindrical body that has the following portions: (a) an optical fiber-fixing portion for securely holding an optical fiber for transmitting multiwavelength light bidirectionally, (b) a semiconductor laser-fixing portion for securely holding a semiconductor laser for emitting outgoing light λ1, (c) a photodiode-fixing portion for securely holding a photodiode for receiving incoming light λ2, (d) an optical path-forming space for optically coupling the optical fiber, the semiconductor laser, and the photodiode, and (e) in the optical path-forming space, an optical filter-fixing face for securely holding an optical filter for separating multiplexed wavelengths. The jointing holder enables the optical module to reduce the number of components, to be miniaturized, and to reduce the dimensional deviation at the time of the assembly, enabling high-precision assembly. An optical module for single-fiber bidirectional communication incorporates the jointing holder.
摘要:
An object of the invention is to provide a rear projection device capable of inhibiting noises generated from respective circuits from mutually affecting each other. With the rear projection device, an optical unit is disposed substantially at the center part of a chassis frame of a body cabinet, and an analog signal processing circuit board and a power-source circuit board for the light-source lamp are disposed at the left and right ends of the chassis frame of the body cabinet, respectively, a shield case being provided there between so as to be erect and run along a front-to-rear direction. Accordingly, the shield case is disposed in a region where the analog signal processing circuit board is linearly connected to the power-source circuit board for the light-source lamp in such a way as to provide complete blockage therebetween, so that noises occurring to the respective circuit boards will be absorbed by the shield case to thereby prevent those noises from having an effect on each other.
摘要:
An operation region detection device includes a dog, a support member for supporting it, and a detection switch outputting a signal based on contact or noncontact with the corresponding dog. The support member is arranged in a hollow part of a joint of a robot and attached to one of two link members of the robot rotatable relative to each other so that a center axis of the support member is substantially aligned with a rotation axis of relative rotation of the two link members. The dog is attached to the outer circumference of the support member and has a length corresponding to a predetermined detection region along a peripheral direction of the outer circumference. The detection switch is provided on the other of the two link members at a position facing the dog to detect a region to which a current position of the relative rotation belongs based on the state of output of the signal. An operation range restricting device for restricting an operation range of the relative rotation based on a region to which a current position of the detected relative rotation belongs.
摘要:
An eccentric-rotation type planetary differential reduction gear speed reducer (10) includes a cylindrical housing (14). The cylindrical housing (14) is fixed to a first member (3) constituting a link of a robot, and an output shaft (16) of the speed reducer (10) is fixed to a second member (4) constituting a link of the robot. An eccentric shaft (11) constituting an input shaft of the speed reducer (10) is coupled to a motor shaft (2) of a servo motor mounted on the first member (3). Splines are formed directly on the outer peripheral surface of the motor shaft (2) to form a spline shaft (5). The spline shaft is fitted into a spline hole formed in the eccentric shaft (11), so that the motor shaft (2) is directly coupled to the eccentric shaft (11).
摘要:
An optical communication module having a roughened bottom of a silicon bench for suppressing optical crosstalk. The roughened bottom prevents stray laser beams from reflecting toward a photodiode. The roughened bottom is further covered with a photoabsorbent resin, pigment or adhesive for absorbing the stray laser beams at a bottom. A cladding of a lightwaveguide are narrowed and are painted with a photoabsorbent resin, pigment or adhesive for absorbing horizontally stray beams propagating in the cladding.
摘要:
In an articulation system for a robot according to the present invention, an eccentric rocking type planetary gear speed reducing mechanism is used, but a two-stage speed reducing structure is not employed. Output of an acceleration sensor (11) attached to an output shaft (7) of a speed reducer (10) is passed through a band pass filter (12) to obtain a vibration component. Based on the obtained vibration component and the rotational phase of the motor detected by a pulse coder (13), a vibration suppression correction torque corresponding to the rotational phase of the motor is determined. The vibration suppression correction torque is added to the torque command Tc to correct the torque command and causes the motor (1) to operate in accordance with the corrected torque command. The vibration suppression correction torque is determined by learning processing and is updated until the vibration component is sufficiently reduced. When the vibration component has been sufficiently reduced, this updating operation is stopped, the vibration suppression correction torque is fixed. Further, the torque command is corrected, and operation of the motor (1) is controlled in accordance with the corrected torque command.
摘要:
An optical communications module in which electrical crosstalk is reduced. The term “optical communications module” represents a surface-mounting-type optical tranceiver, transmitter, or receiver module. The optical communications module has a following structure. (a) An Si substrate carries at least one signal-transmitting section comprising an LD, at least one signal-receiving section comprising a PD, or both together with other components. (b) An insulating substrate is bonded to the back face of the Si substrate. (c) A separating groove separates the Si substrate along the or each boundary line between the sections in order to prevent an AC current flowing through the Si substrate. To attain this object, the separating groove is provided from the top surface of the Si substrate to some midpoint of the insulating substrate. This structure reduces the electrical crosstalk between the signal-transmitting section and the signal-receiving section, between the signal-transmitting sections, and between the signal-receiving sections.
摘要:
A robot provided with a robot mechanism including a first member and a second member, the first member and the second member being movable relative to each other; and a laying structure for laying an umbilical member in the robot mechanism. The robot includes the umbilical member laid to extend between the first member and the second member; a movable clamp member movably provided in the first member to clamp the umbilical member; and a connecting member for connecting the movable clamp member to the second member in a correlatively movable manner. The connecting member transmits a force generating due to a movement of the second member relative to the first member to the movable clamp member, so as to move the clamp member in the first member.