摘要:
There are provided a method and an apparatus for absolute position detection, in which position detection is performed with high accuracy by interpolation between feedback pulses generated as an object of position detection moves, and the power-on command displacement can be calculated with high accuracy, the method and the apparatus entailing only small electric power consumption. A stored value in an absolute counter (2), which is indicative of an approximate absolute position of an object of position detection, is updated each time a feedback pulse is generated from a feedback pulse generating circuit (1), and is retentively stored in the counter even after the power is turned off. As the object of position detection moves, moreover, the count value of interpolation pulses, generated during the time interval which elapses from the instant that the power is turned on again until the first one of the feedback pulses is generated, is temporarily stored in a correction counter (5). The power-on absolute position of the object of position detection is calculated by means of a numerical control unit (20), in accordance with the stored value, the count value, and the moving direction designated by a movement command delivered when the power is turned on. Further, the apparatus calculates the command displacement on the basis of the calculated absolute position and a command target position.
摘要:
The durability of a belt is enhanced by improving the strength of rubber itself while enhancing its peeling strength with respect to a cord, a fabric or a short fiber. A toothed belt (10) comprises a belt body (13) that is integrally formed by a tooth rubber (11) provided on one surface side thereof, a backing rubber (12) provided on the other surface side, and an embedded cord (14) spirally wound in a boundary portion between the tooth rubber (11) and the backing rubber (12) that extends in the longitudinal direction of the belt. A facing fabric (20) covering the tooth rubber (11) is adhered to a surface of the tooth rubber (11), or one surface of the belt body (13). The tooth rubber (11) is obtained by vulcanization-molding a rubber composition including rubber such as HNBR, resorcinol, a melamine compound, silica and the like.
摘要:
A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.
摘要:
A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.
摘要:
A lens barrel includes a fourth lens, a prism, and a sixth lens. The fourth lens receives a light flux incident along a first optical axis. The prism includes a reflecting surface reflecting the light flux passing through the fourth lens to a direction along a second optical axis intersecting with the first optical axis. The sixth lens receives the light flux reflected by the prism. A second group frame includes an opening portion, a prism retaining frame that is arranged in a more inner position than the opening portion and in which the prism is contained, and a plurality of adhesive pockets arranged on an area around the prism retaining frame and being open to the side of the opening portion. Adhesive agent is filled in the adhesive pockets.
摘要:
A lens position calculator is provided that determines a phase of a driving signal as a reference position of an imaging lens when an output value of a position detection sensor reaches a threshold value. The lens position calculator determines a position obtained by performing addition or subtraction on the reference position read out from a reference position storage as a judgment position, detects an output value of the position detection sensor at a timing in synchronization with the driving signal that drives a driver and at the judgment position, and judges whether the output value of the position detection sensor at the judgment position reaches the threshold value or not, so as to determine the reference position again.
摘要:
A lens barrel 11 is mounted to a collapsible imaging device 1 having a zooming function and includes a cam frame 19, a first lens frame 39, a second lens frame 45, and a third lens frame 55. First, second, and third lens frame cam grooves 25, 27, 29, respectively including in the longitudinal direction thereof insertion parts 25a, 27a, 29a, collapse parts 25b, 27b, 29b, and variable power parts 25c, 27c, 29c are formed in the inner peripheral face of the cam frame 19. The third lens frame cam groove 29 are deeper than the first and second lens frame cam grooves 25, 27 and are intersected at the collapse parts 29c thereof with the respective insertion parts 25a, 27a.
摘要:
An imaging optical system is configured with a first lens group disposed on a first optical axis and capturing a luminous flux from a subject along the first optical axis, a prism that folds the luminous flux passed through the first lens group toward a direction along a second optical axis that is substantially perpendicular to the first optical axis and second to fifth lens groups disposed on the second optical axis. At the end of the operation, while the first lens group is driven in a direction of the prism along the first optical axis, the second to the fourth lens groups are driven to an initial angle of view position where these lens groups are to be present at the start of the operation. Thereby, an imaging apparatus whose chassis is very thin and that can realize a high pixel counter and a large magnification, while enabling the speeding-up of the starting operation and the ending operation, can be provided.
摘要:
A substrate 1 for growing nitride semiconductor has a first and second face and has a thermal expansion coefficient that is larger than that of the nitride semiconductor. At least n-type nitride semiconductor layers 3 to 5, an active layer 6 and p-type nitride semiconductor layers 7 to 8 are laminated to form a stack of nitride semiconductor on the first face of the substrate 1. A first bonding layer including more than one metal layer is formed on the p-type nitride semiconductor layer 8. A supporting substrate having a first and second face has a thermal expansion coefficient that is larger than that of the nitride semiconductor and is equal or smaller than that of the substrate 1 for growing nitride semiconductor. A second bonding layer including more than one metal layer is formed on the first face of the supporting substrate. The first bonding layer 9 and the second bonding layer 11 are faced with each other and, then, pressed with heat to bond together. After that, the substrate 1 for growing nitride semiconductor is removed from the stack of nitride semiconductor so that a nitride semiconductor device is provided.
摘要:
A lens barrel 11 is mounted to a collapsible imaging device 1 having a zooming function and includes a cam frame 19, a first lens frame 39, a second lens frame 45, and a third lens frame 55. First, second, and third lens frame cam grooves 25, 27, 29, respectively including in the longitudinal direction thereof insertion parts 25a, 27a, 29a, collapse parts 25b, 27b, 29b, and variable power parts 25c, 27c, 29c are formed in the inner peripheral face of the cam frame 19. The third lens frame cam groove 29 are deeper than the first and second lens frame cam grooves 25, 27 and are intersected at the collapse parts 29c thereof with the respective insertion parts 25a, 27a.