Abstract:
Apparatus and methods are provided for automated semiconductor device probing. The apparatus includes a probe assembly; a machine vision system; and a semiconductor support fixture. A method includes providing apparatus for automated semiconductor device probing; locating the semiconductor device positioned on the semiconductor support fixture with the machine vision system; guiding the movement of at least one of the probe assembly and the semiconductor support fixture so as to position a contact portion of the semiconductor device and the electrical probe in alignment with one another; and moving at least one of the probe assembly and the semiconductor support fixture toward the other of the at least one of the probe assembly and the semiconductor support fixture so as to position the electrical probe and the contact portion of the semiconductor device in electrical connection with one another.
Abstract:
A method and apparatus is provided for calibrating a Fabry-Perot etalon based optical measurement system. The calibration is performed by analyzing the shape of transmission peaks output from the etalon in response to a known optical signal and using that information, along with a formula that approximates the response of the etalon, to perform the calibration.
Abstract:
According to an aspect of the present invention, a power detector including a photodiode and a logarithmic transimpedance amplifier is mounted inside a hermetically sealed package in such a way that the photodiode and the logarithmic transimpedance amplifier are located on the same thermally conductive substrate.
Abstract:
A method and an automated apparatus for three-dimensional optical alignment of optical components for testing or assembly purposes comprise use of a visible light vision system to assist active alignment of optical components based on the measured optical output at a wavelength of light outside of the visible range.
Abstract:
Systems, methods, and devices can detect a dangerous or adverse condition or anticipated condition that indicates an undesirable amount of electric current in a patient-connected tube providing fluid to a patient. The fluid flow to the patient is stopped responsive to the detection. Stoppage of fluid flow to the patient can reduce or prevent electric current in the fluid from reaching a patient, flowing through the patient to ground, and/or continuing to flow through the patient.
Abstract:
A pressure sensor is disclosed for measuring fluid pressure comprising a pressure sensing structure comprising a mass target suspended on a spring mechanism, wherein the mass target and the spring mechanism together exhibit high Q mechanical resonance, wherein the mass target has an area which is presented in a plane perpendicular to the direction of the mechanical oscillation of the structure, and further wherein the mass target and the spring mechanism are in the form of a membrane, and transducer means for measuring the fluid pressure by characterizing the effects that the fluid molecules produce on the motion of the structure.
Abstract:
A method for achieving three-dimensional alignment of a pair of optical components, and apparatus for supporting such method, is initiated by fixing one of the optical components at a selected location on a semiconductor substrate. Subsequently, the other optical component and its associated submount are attached to a pair of coupled motion stages. A reference signal, to which the first optical component has been aligned, is transmitted to the other component and to a detector. That detector is positioned to measure changes in a selected characteristic of the reference signal, such as changes in optical power, as the position of the second optical component and its submount are manipulated. Through the use of a feedback loop, the second component and submount are moved in a pattern until an optimal alignment is converged upon.
Abstract:
According to an aspect of the present invention, a circuit is provided for determining the wavelength and power of a given optical signal across a wide dynamic range. The wavelength and power determinations are performed by logarithmic ratio amplifier in concert with a digital signal processor that utilizes representative equations of the measured optical signal.
Abstract:
A pressure sensor is disclosed for measuring fluid pressure comprising a pressure sensing structure comprising a mass target suspended on a spring mechanism, wherein the mass target and the spring mechanism together exhibit high Q mechanical resonance, wherein the mass target has an area which is presented in a plane perpendicular to the direction of the mechanical oscillation of the structure, and further wherein the mass target and the spring mechanism are in the form of a membrane, and transducer means for measuring the fluid pressure by characterizing the effects that the fluid molecules produce on the motion of the structure.
Abstract:
Apparatus and methods are provided for measuring a selected optical behavior of a tunable opto-electric device by using the electrical characteristics of the opto-electronic device. The benefit of the present invention is the elimination or reduction in complexity of optical wavelength reference hardware that is currently required for wavelength referencing and locking. Accordingly, the present invention reduces the cost and complexity of the optical packaging of tunable opto-electronic telecommunication components. Furthermore, the present invention also significantly simplifies optical and electronic design of system level products with tunable opto-electronic devices.