Abstract: A polarization rotator is provided for rotating the polarization direction of linearly polarized light by any arbitrary angle other than 90°. The device comprises a layer of liquid crystal material disposed between alignment surfaces. In one mode, a 90° twist is induced in the liquid crystal director. An expression is provided for relating the retardation of the layer to the amount of polarization rotation and the angle between the polarization direction of incident light and the alignment direction at the input side of the liquid crystal layer.

Abstract: A method of fabricating a micromechanical device. Several of the micromechanical devices are fabricated 20 on a common wafer. After the devices are fabricated, the sacrificial layers are removed 22 leaving open spaces where the sacrificial layers once were. These open spaces allow for movement of the components of the micromechanical device. The devices optionally are passivated 24, which may include the application of a lubricant. After the devices have been passivated, they are tested 26 in wafer form. After testing 26, any surface treatments that are not compatible with the remainder of the processing steps are removed 28. The substrate wafer containing the completed devices receives a conformal overcoat 30. The overcoat layer is thick enough to project the micromechanical structures, but thin and light enough to prevent deforming the underlying micromechanical structures.

Abstract: Organic surfactants are employed to passivate the surfaces of MEMS devices, such as digital micromirrors. The binding of these surfactants to the surface is improved by first associating with the surface transition metal atoms or ions from Groups IVB, VB, and IVB of the periodic table.

Abstract: Phosphonate surfactants are employed to passivate the surfaces of MEMS devices, such as digital micromirror devices. The surfactants are adsorbed from vapor or solution to form self-assembled monolayers at the device surface. The higher binding energy of the phosphonate end groups (as compared to carboxylate surfactants) improves the thermal stability of the resulting layer.

Abstract: A method of fabricating a micromechanical device. Several of the micromechanical devices are fabricated 20 on a common wafer. After the devices are fabricated, the sacrificial layers are removed 22 leaving open spaces where the sacrificial layers once were. These open spaces allow for movement of the components of the micromechanical device. The devices optionally are passivated 24, which may include the application of a lubricant. After the devices have been passivated, they are tested 26 in wafer form. After testing 26, any surface treatments that are not compatible with the remainder of the processing steps are removed 28. The substrate wafer containing the completed devices receives a conformal overcoat 30. The overcoat layer is thick enough to project the micromechanical structures, but thin and light enough to prevent deforming the underlying micromechanical structures.

Abstract: The present invention is directed to a medical device that assists in overcoming airway obstruction and maintaining an open airway when a patient, who may or may not be anesthetized, is unconscious and placed in the supine position.

Abstract: A broadband optical retardation device, such as may be used for polarisation encoding of display information or in diffractive optical systems, includes a patterned uniform half wave plate retarder in combination with a non-patterned uniform quarter wave plate retarder having an optic axis oriented at 90° to the xz plane. The patterned retarder consists of alternating first and second regions having first and second optic axes at different orientations to a reference axis, for example at +22.5° and −22.5° to the xz plane. Considering light of wavelength &lgr;° incident on the retarder and linearly polarised in the xy plane, such light is differently polarised by the regions, and the light output by the device includes regions in which the light is right circularly polarised and regions in which the light is left circularly polarised.

Abstract: A polarisation rotator is provided for rotating the polarisation direction of linearly polarised light by any arbitrary angle other than 90°. The device comprises a layer of liquid crystal material disposed between alignment surfaces. In one mode, a 90° twist is induced in the liquid crystal director. An expression is provided for relating the retardation of the layer to the amount of polarisation rotation and the angle between the polarisation direction of incident light and the alignment direction at the input side of the liquid crystal layer.

Abstract: An autostereoscopic display comprises a pixellated transflective spatial light modulator which is arranged to provide a visual indication to an observer of the amount of crosstalk caused by reflection of ambient illumination. The display comprises a rear parallax barrier between a backlight and the modulator. Part of the barrier is formed as a screen blocking transmitted light from a first region of the modulator so that the pixels in this region are visible only by reflection of ambient illumination. In a second region, the pixels are illuminated with both transmitted and reflected light. A controller sets the pixels of the first region to maximum intensity and the pixels of the second region to a fraction of the maximum intensity. The fraction corresponds, for example, to a maximum amount of crosstalk which is permissible for autostereoscopic viewing.

Abstract: A method of making a patterned retarder of the present invention includes the steps of providing an alignment layer rubbing the alignment layer in a first rubbing direction, masking with a mask at least one first region of the alignment layer, to reveal at least one second region of the alignment layer, rubbing the at least one second region through the mask in a second rubbing direction different from the first rubbing direction, removing the mask, disposing on the alignment layer a layer of birefringent material whose optic axis is aligned by the alignment layer, and fixing the optic axis of the birefringent layer.

Abstract: A medical device for positioning a patient correctly in the sitting position when performing spinals or epidurals. The medical device is wedge shaped and inflexible. The device can have handles adjacent to the front wall of the wedge or can be used without the handles. The device is used by first placing it on an elevated surface, then having a patient sit on the device so that the patient's knees flex at the front and upper juncture of the device. The patient is then instructed to sit upright. By sitting upright, the pelvis will rotate backwards thereby promoting flexion of the lumbar/thoracic spine. On the medical device with handles, the flexion of the lumbar/thoracic spine can be augmented by having the patient push upward, palms up, on the handles. The upward pushing forces will force the lumbar spine posteriorly and further increase thoracic/lumbar flexion.

Abstract: A parallax barrier includes a polarization modifying layer having aperture regions, for supplying light of a second polarization when receiving light of a first polarization, separated by barrier regions, for supplying light of a third polarization different from the second polarization when receiving light of the first polarization, and a polarizer selectively operable in a first mode and a second mode. At least one of the aperture regions and the barrier regions alters the polarization of light passing therethrough. The polarizer passes light of the second polarization and blocks light of the third polarization in the first mode and passes light of the third polarization in the second mode.

Abstract: A configurable scheduling method and apparatus for scheduling orders and worker according to a constraint set including a programmable constraint set and a fixed constraint set. The programmable constraint set programmed by a service organization to alter the schedule process from a normal process governed by the fixed constraint set to a reconfigured process also governed by the programmable constraint set.

Abstract: Provided herein are data structures, processes and systems to facilitate scheduling of complex work orders to a mobile workforce. Complex work orders are comprised of several distinct sub-orders that require coordinated scheduling because the start of one sub-order is dependent on the start or completion of another. The data structure provided herein identifies a set of member sub-orders required for completing complex work orders and relates those sub-orders to one another by precedence criteria that establish which sub-orders are dependent on which other sub-orders. This data structure is used in computer processes integrated with workforce management systems to permit such systems to schedule and/or assign individual work orders in a coordinated manner to satisfy the precedence criteria.

Abstract: A system and method schedules splittable work orders to provide customers with requested service and efficiently utilize service resources. The method includes forming a list of appointment windows for days on which service may be performed. A request for service from a customer is identified as being a splittable work order. The splittable work order is assigned a job duration required to complete the order and a split time less than the job duration. An appointment window on a first day during which a portion of the service may be scheduled is determined. The appointment window is for the split time in duration. At least one appointment window on a subsequent day or days during which the remainder of the service may be scheduled is then determined. The splittable work order is scheduled by assigning the work order to the determined appointment windows on the determined first and subsequent days.

Abstract: A parallax barrier includes a polarisation modifying layer having aperture regions, for supplying light of a second polarisation when receiving light of a first polarisation, separated by barrier regions, for supplying light of a third polarisation different from the second polarisation when receiving light of the first polarisation, and a polariser selectively operable in a first mode and a second mode. At least one of the aperture regions and the barrier regions alters the polarisation of light passing therethrough. The polariser passes light of the second polarisation and blocks light of the third polarisation in the first mode and passes light of the third polarisation in the second mode.

Abstract: Methods for providing an enhanced scheduling process are discussed. One aspect of the present invention includes a method for assigning an order to an opening in a schedule after a customer has selected an appointment window in the schedule. The opening and the appointment window are specified. The method includes generating a list of schedulable time blocks for a shift identified in the opening, intersecting the opening and the appointment window to obtain a time range, and choosing the opening in which to assign the order if a schedulable time block from the list of schedulable time blocks includes the opening. The opening is within the time range obtained by the act of intersecting.

Abstract: An aspect of the present invention includes a method for finding an opening in which to fit an order in a schedule. The method includes computing an amount of time required in a shift to fit the order, and creating a schedulable time block from a virtual free time block. The schedulable time block includes a primary block. The method further includes examining the primary block. The primary block is a candidate for fitting the order if the duration of the primary block, excluding at least one break, is greater than or equal to the amount of free time required in the shift to fit the order. The method further includes creating at least one opening in the shift from the schedulable time block so as to present to a customer at least one option of fitting the order in the schedule to perform a desired service.

Abstract: Systems and methods for providing an enhanced scheduling process are discussed. One aspect of the present invention includes a method for scheduling mobile service representatives. The method includes negotiating an appointment window for booking a reservation, assigning the reservation to a shift of a mobile service representative, and optimizing periodically the shift of the mobile service representative while the acts of negotiating and assigning are executing.

Abstract: A passive polarisation modulating optical element comprises a layer of birefringent material. The layer has substantially fixed birefringence and comprises retarder regions forming a regular pattern, for instance to act as a parallax barrier for a 3D display. The retarders have optic axes aligned in different directions from each other. The element may be associated with a polariser, for instance an output polariser of a liquid crystal device, with the polarising direction of the polariser being parallel to the optic axis of the retarders. Thus, the retarders have no effect on the intensity of light passing through the element whereas the retarders act as half waveplates and rotate the polarisation vector of light passing therethrough, for instance by 90.degree..