Abstract:
According to an embodiment, an interrogator includes a beam generator operable to scan a variable-power beam across a field of view, a detector aligned to receive an electromagnetic signal from the field of view and generate a corresponding detection signal, and a controller operatively coupled to the detector and the beam generator and operable to vary the power of the beam as it scans across the field of view responsive to the detection signal. According to an embodiment, an illumination system includes an illumination source operable to provide spatially-varying illumination, a detector configured to receive scattered energy from the spatially-varying illumination, and an electronic controller operable to vary the spatial variation of the illumination responsive to the scattered energy received by the detector. According to an embodiment, a method includes illuminating a field of view with a variable power illumination pattern, receiving scattered light from the field of view, and modifying the pattern of the variable power illumination responsive to the scattered light
Abstract:
A laser drive controller compensates for temperature-dependent effects of a temperature-sensitive laser. Temperature variations in the laser may be measured and/or predicted based on variable pulsed output. The controller may drive the laser to maintain temperature and/or to compensate for variations in temperature. The techniques may be applied to a laser scanner, scanned beam display, laser printer, laser camera, scanned beam imager, etc.
Abstract:
A scanned light display system includes a light emitter array having a plurality of light sources operable to emit diverging light and an array of collimating elements positioned so that each of the collimating elements receive at least a portion of the light emitted from a corresponding one of the light sources. Each of collimating elements is configured to substantially collimate the received light from at least one corresponding light source into respective beams. The scanned beam display is operable to scan the respective beams to provide an image to a viewer. The displayed image appears substantially fixed to a viewer as the viewer's eye moves relative to the array of collimating elements. In one embodiment, each of the collimating elements is a curved mirror. In other embodiments, each of the collimating elements includes at least one lens or a curved mirror/lens pair.
Abstract:
Scanned beam imagers and endoscopes are disclosed. In one embodiment, a scanned beam imager includes a first light source operable to provide a first beam and a second light source operable to provide a second beam. The scanned beam imager includes a scanner positioned to receive the first and second beams. The scanner is operable to scan the first beam across a FOV as a first scanned beam having a first beam waist distance and the second beam across the FOV as a second scanned beam having a second beam waist distance not equal to the first beam waist distance. A detector is configured to collect reflected light from the FOV. In another embodiment, a scanned beam imager is configured to scan the first and second beams across different FOVs. Such scanned beam imagers may also be incorporated into endoscope tips and bar code scanners.
Abstract:
A portable end device, such as a bar code scanner, may be equipped with auxiliary interfaces. The auxiliary interfaces may be easily added to the end device as a replaceable cover, such as a replaceable battery door. A signal path conducts signals to and from the replaceable cover. One auxiliary interface is a Bluetooth radio. Data integrity protocols may be selected to guarantee delivery and guarantee no duplicate deliveries. Host pairing algorithms may provide standard or strong pairing with a host computer. Ergonomic interface features allow a user to control and monitor the operation of the end device and the data link with minimal hardware cost and battery life impact. Host software programs provide data routing, automatic reestablishment of the data link, and other functions. The system is adaptable to a wide array of use environments through the selection of timer parameters in the end device.
Abstract:
According to embodiments, scanned beam source may include a first beam shaping optical element aligned to receive a composite beam of light carrying a plurality of wavelength components and a second beam shaping optical element aligned to receive the composite beam of light from the first beam shaping optical element and configured to modify the first plurality of wavelength components of the composite beam to a plurality of dimensions proportional to wavelength. The first beam shaping optic may be, for example, a top-hat converter. The second beam-shaping optic may be, for example, a polarization-sensitive clipping aperture, a wavelength-dependent clipping aperture, and/or an achromatic corrector.
Abstract:
A control system for a projection display includes means for compensating for spatial variations or artifacts in light scattered by a projection screen. According to embodiments, a sensor produces a signal corresponding to the amount of light scattered to a viewer on a region-by-region or pixel-by-pixel basis. A screen map is created from the sensor signal. Input display data is convolved with the screen map to produce a compensated display signal. The compensated display signal drives a projection display engine. The projected light driven by the compensated display signal convolves with the display screen to produce a viewable image having reduced artifacts. According to one embodiment, a relatively fixed screen map is produced during a calibration routine. According to another embodiment the screen map is updated dynamically during a display session.
Abstract:
A scanned light display system includes a light emitter array having a plurality of light sources operable to emit diverging light and an array of collimating elements positioned so that each of the collimating elements receive at least a portion of the light emitted from a corresponding one of the light sources. Each of collimating elements is configured to substantially collimate the received light from at least one corresponding light source into respective beams. The scanned beam display is operable to scan the respective beams to provide an image to a viewer. The displayed image appears substantially fixed to a viewer as the viewer's eye moves relative to the array of collimating elements. In one embodiment, each of the collimating elements is a curved mirror. In other embodiments, each of the collimating elements includes at least one lens or a curved mirror/lens pair.