摘要:
An illumination apparatus forms, onto a linear array light modulator, a line of illumination that extends in a linear direction. The illumination apparatus has a first laser array with laser emitters for forming a first linear beam array and a second laser array with laser emitters for forming a second linear beam array. An array combiner aligns at least the first and second linear beam arrays in the linear direction and directs the first and second linear beam arrays along a propagation path to form a mixed illumination. At least first and second cylindrical lens elements having power in the linear direction relay the mixed illumination from the propagation path toward the linear array light modulator. At least third and fourth cylindrical lens elements having power in the cross-array direction that is orthogonal to the linear direction focus the mixed illumination onto the linear array light modulator.
摘要:
A digital projection apparatus has a first light modulation subsystem with a first light source producing linear illumination of a first spectral color and a second light source producing linear illumination of a second spectral color. A first light modulator chip (110a) has at least two independently addressable linear arrays of light modulating devices. A first spatial filter (108) blocks reflected light and transmits diffracted light along a first optical path. A second light modulation subsystem has at least a third light source producing linear illumination of a third spectral color. A second light modulator chip has at least one independently addressable linear array of light modulating devices. A second spatial filter blocks reflected light and transmits diffracted light along a second optical path. A color combining element directs modulated light onto a common optical path. Projection optics direct modulated light toward a scanning element (122) for projection toward a display surface (124).
摘要:
A method and apparatus for delivering a mixture of compressed fluid and marking material and depositing the marking material in a pattern onto a substrate, includes a high pressure source of a mixture of compressed fluid and marking material. A micro-machined manifold includes a plurality of micro-nozzles, a fluid chamber, and an entrance port with portions of a first surface of the micro-machined manifold defining the entrance port with the entrance port being connected in fluid communication with the fluid chamber. Each of the micro-nozzles having an inlet and an outlet with the inlet being connected in fluid communication with the fluid chamber and the outlet being located on the second surface of the micro-machined manifold. Each micro-nozzle is shaped to produce a directed beam of the mixture of compressed fluid and marking material beyond the outlet of the micro-nozzle. A housing is connected in fluid communication with the high pressure source and the entrance port of the micro-machined manifold with the connection being a sealed connection. Optionally, a device operable to capture marking material that does not adhere to the substrate can be included.
摘要:
An apparatus for imaging a tooth having a light source with a first spectral range and a second spectral range. A polarizing beamsplitter (18) light having a first polarization state toward the tooth and directs light from the tooth having a second polarization state along a return path toward a sensor (68), wherein the first and second polarization states are orthogonal. A first lens (22) in the return path directs image-bearing light from the tooth, through the polarizing beamsplitter (18), toward the sensor (68), and obtains image data from the redirected portion of the light having the second polarization state. A long-pass filter (15) in the return path attenuates light in the second spectral range. Control logic enables the sensor to obtain either the reflectance image or the fluorescence image.
摘要:
Apparatus for measuring the surface profile of a sample, includes a fixture for locating a surface of a transparent optical flat relative to a surface of a sample; a low-coherence light interferometer having an optical probe coupled to an XY scanning frame for scanning the surface of the sample through the transparent optical flat to produce interferometric data signals representing the distances between the optical flat surface and the surface of the sample; and a computer system responsive to the interferometric data signals for generating a surface profile of the sample using a best fit to a plane.
摘要:
An optical probe apparatus for determining a position of an image sensor in a digital camera relative to a reference surface on the digital camera. The optical probe assembly includes a probe mounting surface adapted to be removably mountable to the digital camera and lockable in a predetermined orientation relative to the reference surface of the digital camera; an angle cleaved optical fiber emitting a beam of light; a lens disposed in the path of the beam of light and directing the beam of light along an axis normal to a plane of the lens toward the object; and a mounting member supporting the optical fiber such that the beam of light is directed along an axis normal to the plane of the lens and directed to the center of the lens. An optically transparent material (such as a pellicle or glass plate) is disposed intermediate the probe mounting surface and image sensor.
摘要:
A method for determining the optical retardation of an anisotropic material. A beam of light is directed toward a sample of the material and a portion of the reflected beam is collected from the optical interfaces of the material and directed toward an interferometer. The resulting interference signal is analyzed to determine the retardation. The retardation is determined as being the distance between particular peaks of the interference signal. In a further embodiment, light from multiple wavelength light sources is directed toward the sample of the material.
摘要:
An optical fiber connector or coupler (24-54) is provided which partially reflects light travelling in one direction (56) but preferably transmits light without reflection in the opposite direction (58). When such connectors (C.sub.o to C.sub.n) are alternated with ambient environment sensors (S.sub.l to S.sub.n) in an optical fiber transmission path, light pulses launched in the one direction from a source (60) produce reflected light at a detector (62) which reflected light can be correlated to a preselected characteristic of the environment at each sensor. A series of such connectors can be used without sensors to provide reference signals from points along an optical fiber transmission path. A single fiber path can be used, without the need for a separate fiber for feedback.
摘要:
A body of polymeric piezoelectric material is nonuniformly poled by establishing a temperature gradient greater than about 10.degree. C. and less than about 100.degree. C. across the thickness of the body and applying an electric field across the thickness of the body in an amount and for a time sufficient to induce nonuniform polarization in the material, whereby a portion of the body near the surface maintained at a lower temperature receives relatively stronger polarization than a portion near the surface maintained at a higher temperature.In a preferred embodiment of the invention, after poling in one direction in a temperature gradient to more strongly polarize a portion of the material near one surface, the temperature gradient and the field polarity are reversed, to polarize a portion of the body near the opposite surface in an opposite direction.Flexure mode elements comprising continuous bodies of polymeric piezoelectric material nonuniformly poled according to the method of the present invention exhibit relatively strong flexure mode response to applied fields. A novel flexure mode element produced by one of the methods of the present invention is characterized by having relatively strong polarization near one surface in a direction pointing into the body of material. Another novel flexure mode element produced by one of the preferred methods of the present invention is characterized by having relatively strong polarization in portions near opposite sides of the body and in opposite directions pointing inward toward the body of the material.
摘要:
A system and method of printing includes providing print and non-print drop formation waveforms to a drop formation device of a drop ejector in response to input print data to form print and non-print drops, respectively, from a liquid jet. First and second charging waveforms are provided to a charging electrode of a drop charging device when a relative motion of a receiver and the drop ejector is provided or measured at first and second speeds, respectively. The first and second charging waveforms are independent of input print data and include first and second voltage states. The drop formation device and the drop charging device are synchronized to produce print and non-print drop charge states on print and non-print drops, respectively. A deflection device causes print and non-print drops to travel along print and non-print drop paths, respectively, with the non-print drops being collected by a catcher.