摘要:
A circuitry testing module for testing an external circuit of a Light-Emitting Diode (LED) includes at least one logic unit and a latch circuit. Two input terminals of the at least one logic unit are connected to a first end and a second of the LED correspondingly. The output terminal of the at least one logic unit is connected to the latch circuit. If the external circuit works normally, the logic unit outputs a first logic operating signal to the latch unit, and the latch circuit outputs a first latch signal. If the external circuit does not work normally, the logic unit outputs a second logic operating signal to the latch unit, and the latch circuit outputs a second latch signal.
摘要:
A near-field scanning optical microscope is disclosed. The microscope includes a lighting component, a probe and an ellipsoidal mirror. The lighting component emits a light. The probe is disposed on one side of a testing sample, and the light is focused around a probe tip to draw the near-field light out. The ellipsoidal mirror has a first focal point and a second focal point, and the first focal point and the probe tip are disposed at the corresponding positions, and the near-field light drawn out from the probe tip is scattered from the first focal point inside the ellipsoidal mirror, and reflected and passed through the second focal point.
摘要:
A communication media having a first media portion defining a first end, a second media portion having first and second ends, the first end of the second communication media fused to the first end of the first media portion at a media joint, the second media portion configured to transmit data received from the first media portion; and a support sleeve disposed about the media joint. The support sleeve defines an end face, the second end of the second communication media terminating at an end surface parallel with the end face, the end face configured to be selectively connected to a media component.
摘要:
A cable connector assembly includes an insulative housing, a connector section retained in the insulative housing, a cable electrically connecting with a rear side of the connector section, and a cover fastened at a rear end of the insulative housing. The insulative housing defines a cavity opening outwardly along a first direction. The connector section is received in the cavity. The cable extends out of the insulative housing. The cover holds the cable to make the cable bend along a second direction perpendicular to the first direction and preventing the bent cable from swinging.
摘要:
A near-field scanning optical microscope is disclosed. The microscope includes a lighting component, a probe and an ellipsoidal mirror. The lighting component emits a light. The probe is disposed on one side of a testing sample, and the light is focused around a probe tip to draw the near-field light out. The ellipsoidal mirror has a first focal point and a second focal point, and the first focal point and the probe tip are disposed at the corresponding positions, and the near-field light drawn out from the probe tip is scattered from the first focal point inside the ellipsoidal mirror, and reflected and passed through the second focal point.
摘要:
An cable connector assembly (100), comprising an insulative housing (1) defining a plurality of cavities (16), a plurality of contacts (2) received in the corresponding cavities, a plurality of wires (4) electrically connected with the contacts (2), and a printed circuit board (3) assembled to a back end of the insulative housing. The printed circuit board defines a first conductive portion (32) electrically connected with the contacts and a second conductive portion (33) electrically connected with the wires, the wires are located in front of the printed circuit board and soldered to the second conductive portion, and the wires are arranged to extend forwards along a mating direction and perpendicular to the printed circuit board.
摘要:
Apparatus and methodology for testing coated optical-fiber bend fatigue and operational reliability by subjecting a coated optical-fiber carrying an optical signal to bending motion. The motion can be either: (1) in the same angular direction for multiple revolutions or (2) alternating clockwise and counterclockwise directions for repetitive single revolutions. The motions are achieved by using either a single conical-cylindrical form or two conically-shaped forms separated from each other by a constant gap width with the coated optical-fiber under test strung in the gap between the forms. With the two cones, the fiber is wrapped over each form in an alternating manner by a rotating arm that makes only single revolutions in clockwise and counterclockwise directions. With either embodiment, varied circumferences are controllably presented to the optical fiber resulting in varying bend radii. Fiber tension, signal strength and optical wavelength are parameters that can also be varied under computer control, the computer providing spreadsheet data for clear analysis.
摘要:
A method may include injecting a test signal having a first optical launch power into a device under test via an optical splitter. The optical splitter includes at least two upstream ports and a downstream port and the test signal is injected in a first upstream port of the optical splitter. The device under test is coupled to the downstream port. Return loss associated with the device under test is measured at a second upstream input of the optical splitter. The RL measurement in stored a database. The injecting, measuring, and storing are repeated for a number of different optical launch powers.