摘要:
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.
摘要:
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.
摘要:
We disclose apparatus that includes: (a) an enclosure including an aperture; (b) a prism mounted in the enclosure so that a surface of the prism is exposed through the aperture; (c) an optical assembly contained within the enclosure, the optical assembly including a radiation source and a radiation detector, the source being configured to direct radiation towards the prism and the detector being configured to detect radiation from the source reflected from the exposed surface of the prism; and (d) an electronic processor contained within the enclosure, the electronic processor being in communication with the detector. The apparatus can be configured so that, during operation, the electronic processor determines information about a sample placed in contact with the exposed surface of the prism based on radiation reflected from the exposed prism surface while it is in contact with the sample.
摘要:
A spectrometer comprising a collimating element for receiving input light and collimating the same, a dispersive optical element for receiving light from the collimating element and dispersing the same and a focusing element for receiving light from the dispersive optical element and focusing the same on a detector assembly wherein, where the wavelength dispersion of the dispersed light extends in the x-y direction, the collimating element and the focusing element are formed so as to maintain the desired optical parameters in the x-y plane while having a reduced size in the z direction.
摘要:
A laser source for generating amplified and filtered optical output, comprising a VCSEL, a power optical amplifier, and a filter. A laser source for generating amplified and filtered optical output, comprising a first mirror and a second mirror forming a cavity, an optical amplifier disposed in the cavity, and filter means for filtering ASE generated and amplified by the optical amplifier. A system for generating amplified and filtered optical output, comprising an optical platform having electrical connections and a fiber optic connection, a VCSEL configured to generate seed light, an optical amplifier configured to receive and amplify seed light to generate power boosted ASE and a filter configured to reduce background noise from the power boosted ASE. A method of generating optical output having high optical power with high spectral fidelity, comprising generating seed light, amplifying seed light, and filtering the amplified optical output to reduce background noise.
摘要:
A Raman probe assembly for analyzing a specimen, comprising: a light source for generating laser excitation light; a camera for capturing an image; a light analyzer for analyzing a Raman signature; and a light path for (i) delivering the laser excitation light from the light source to the specimen so as to produce the Raman signature for the specimen, (ii) capturing an image of the specimen and directing that image to the camera, and (iii) directing the Raman signature of the specimen to the light analyzer. A Raman probe assembly for analyzing a specimen, comprising: a light source for generating laser excitation light; a camera for capturing an image; a light analyzer for analyzing a Raman signature; a first light path for delivering the laser excitation light from the light source to the specimen so as to produce the Raman signature for the specimen; a second light path for capturing an image of the specimen and directing that image to the camera; a third light path for directing the Raman signature of the specimen to the light analyzer; wherein the a least a portion of the first light path, the second light path and the third light path are coaxial with one another. A Raman probe assembly for analyzing a specimen, comprising: a light source for generating laser excitation light; a light analyzer for analyzing a Raman signature; a light path for (i) delivering the laser excitation light from the light source to the specimen so as to produce the Raman signature for the specimen, and (ii) directing the Raman signature of the specimen to the light analyzer; wherein the assembly further comprises a probe body for housing the at least a portion of the light path, and a window, with the light path extending through the window; and further wherein the probe body further comprises a shutter/wiper disposed adjacent to the window. A Raman probe assembly for analyzing a specimen, comprising: a light source for generating laser excitation light; a light analyzer for analyzing a Raman signature; a light path for (i) delivering the laser excitation light from the light source to the specimen so as to produce the Raman signature for the specimen, and (ii) directing the Raman signature of the specimen to the light analyzer; and wherein the light analyzer comprises a transmitter for transmitting information using an Internet Web protocol. A method for identifying the nature of a specimen, the method comprising: providing a Raman probe assembly comprising: a light source for generating laser excitation light; a camera for capturing an image; a light analyzer for analyzing a Raman signature; a light path for (i) delivering the laser excitation light from the light source to the specimen so as to produce the Raman signature for the specimen, (ii) capturing an image of the specimen and directing that image to the camera, and (iii) directing the Raman signature of the specimen to the light analyzer wherein the assembly further comprises a probe body for housing the at least a portion of the light path, and a window, with the light path extending through the window; wherein the probe body further comprises a shutter/wiper disposed adjacent to the window; wherein the assembly is carried by a remote controlled robot; providing a base station for receiving the image, and for remotely controlling the robot, and for receiving information from the light analyzer; navigating the remote control robot from the base station to a position adjacent to the specimen; opening the shutter/wiper; using the camera to aim the probe body at the specimen; energizing the light source so that the laser excitation light is directed at the specimen; and analyzing the return light passed to the light analyzer so as to determine of the nature of the specimen.
摘要:
A laser comprising: a front mirror and a rear mirror which are disposed so as to establish a reflective cavity therebetween; a gain region disposed between the front mirror and the rear mirror, the gain region being constructed so that when the gain region is appropriately stimulated by light from a pump laser, the gain region will emit light; and one of the front mirror and the rear mirror being positioned to admit pump light into the reflective cavity, the one of the front mirror and the rear mirror having a low and substantially constant reflectance over a pumping wavelength range and having a high and substantially constant reflectance over a lasing wavelength range.
摘要:
A method is provided for fabricating microelectromechanically tunable vertical-cavity surface-emitting lasers and microelectromechanically tunable Fabry-Perot filters with precise lateral and vertical dimensional control. Strained reflective dielectric film(s) are applied to a multiple quantum well structure to electronically band-gap-engineer the quantum wells. Appropriate strain in the reflective dielectric film layers is also used to create appropriate curvature in one of the reflective dielectric film stacks so as to form a confocal cavity between a planar reflective dielectric film layer and the curved reflective dielectric film layer in the vertical cavity surface emitting laser or filter. Microelectromechanical tunable vertical cavity surface emitting lasers and filter structures are also provided which include a suspended membrane structure made of a dielectric/metal membrane or metal film that supports a cavity-tuning reflective dielectric film stack while being anchored at the perimeter by metal support post(s). Precise air-cavity length and lateral dimensions are achieved by micro-die-casting using a micro-machined sacrificial polyimide or aluminum disk. Further, tuning is achieved by translational movement of the cavity-tuning reflective dielectric film stack in a controlled electrostatic field.
摘要:
We disclose apparatus that includes: (a) an enclosure including an aperture; (b) a prism mounted in the enclosure so that a surface of the prism is exposed through the aperture; (c) an optical assembly contained within the enclosure, the optical assembly including a radiation source and a radiation detector, the source being configured to direct radiation towards the prism and the detector being configured to detect radiation from the source reflected from the exposed surface of the prism; and (d) an electronic processor contained within the enclosure, the electronic processor being in communication with the detector. The apparatus can be configured so that, during operation, the electronic processor determines information about a sample placed in contact with the exposed surface of the prism based on radiation reflected from the exposed prism surface while it is in contact with the sample.
摘要:
We disclose apparatus that includes: (a) an enclosure including an aperture; (b) a prism mounted in the enclosure so that a surface of the prism is exposed through the aperture; (c) an optical assembly contained within the enclosure, the optical assembly including a radiation source and a radiation detector, the source being configured to direct radiation towards the prism and the detector being configured to detect radiation from the source reflected from the exposed surface of the prism; and (d) an electronic processor contained within the enclosure, the electronic processor being in communication with the detector. The apparatus can be configured so that, during operation, the electronic processor determines information about a sample placed in contact with the exposed surface of the prism based on radiation reflected from the exposed prism surface while it is in contact with the sample.