Abstract: An image projector according to the present invention includes a first light source that emits visible light and a second light source that emits invisible light and projects the visible light and the invisible light onto a screen. The screen includes a material, at least one of the visible light reflectance, transmittance and absorbance of which changes when irradiated with the invisible light projected. The image projector further includes a modulating section for modulating the intensities of the visible light and invisible light based on an image signal and a control section for controlling the modulating section.

Abstract: A smart camera includes an integrated lighting current controller and can couple to one or more external light sources. The integrated lighting current controller can control and power the one or more external light sources using a current pulse. The one or more external light sources can provide illumination for the smart camera to acquire the image of an object under test.

Abstract: An image projection method and a projector are provided to be able to change aspect ratio or resolution of a projection image, without setting of keystone correction again. The projector sets a displayable region with a shape according to an aspect ratio and a resolution of the projection image. The projector converts coordinates of the displayable region into coordinates in a screen coordinate system, and generates a rectangular area with a desired aspect ratio in a region corresponding to the displayable region in the screen coordinate system and a portion included in a projecting range. The projector converts the coordinates of a rectangular area into coordinates of a range corresponding to the rectangular area in the panel coordinate system, forms an image in a range corresponding to the rectangular area, and projects the projection image on the screen.

Abstract: An injection-locked laser is disclosed. The injection-locked laser comprises a seed laser, an oscillator into which a certain component of light output from the seed laser is injected as seed laser light, a frequency converter which shifts a frequency of the remaining component of the light output from the seed laser, a photodetector which detects light obtained by synthesizing the light output from the oscillator and the light output from the frequency converter, and a controller which controls an optical path length of the oscillator based on a beat signal component contained in the signal output from the photodetector.

Abstract: Apparatus for measuring a pattern in a surface of an object, comprising a plurality of pixel or sensor elements being responsive to a physical parameter of the object surface, and means for establishing an overall, segmented picture related to said pattern, and also comprising at least one diode functionally associated with each sensor element for contributing to one or more of the following functions: selectively addressing said sensor element activating said sensor element, and sensing of said physical parameter.

Abstract: A light source device includes: a plurality of light emitting elements that emit laser light; and a wavelength selective element that includes a light selective region functioning as a resonator mirror of the light emitting element by selecting light of predetermined selective wavelength from the laser light emitted from one of the light emitting elements and reflecting the selected light toward the light emitting element while allowing the remaining laser light to pass therethrough, and a base member having a plurality of the light selective regions so that the wavelengths of the light selected by the light selective regions are different from each other.

Abstract: A system and method for automatically modifying an image prior to projection. The system includes an image forming element configured to project an image to a projection surface having at least one property and a detection module coupled to the image forming element, the detection module capable of detecting at least one property with respect to the surface. The system further includes at least one processor configured to modify an outgoing image in response to the at least one property of the surface, such as color, texture and surface curvature.

Abstract: An optical motion tracking device (10) includes a photo detector array (18) comprised of highly sensitive photo sensors coupled to a computational circuit (19) inside a casing (11). The photo detector array (18) detects optical features of a surface (25) using ambient light reflected from or propagated through the surface (25) and transmitted into the casing through an aperture (15). Protrusions (14) on the bottom (10) lifts the device (10) from the surface (25) and allow the ambient light to illuminate the surface (25). A nontransparent sidewall (17) encloses a light path from the aperture (15) to the photo detector array (18) to reduce light interference. A reflective band (32) near the aperture (15) to increases the illumination of the surface (25). The computational circuit (19) calculates the correlation between the images from the photo detector array (18) to track the motion of the device (10).

Abstract: A projection display device comprises a main body cabinet, a projection lens section to which light modulated by a light modulating element entered, and a mirror section for reflecting the light emitted from the projection lens section to a projection plane. A level difference depending on an arrangement shift of the projection lens section and the mirror section is formed on a second side surface facing a first side surface having light projection port of the main body cabinet. Furthermore, the projection display device comprises a level difference correction section for directing the light from the mirror section in a desired direction by correcting the level difference, when the main body cabinet is planed on a plane to be placed, the second side surface facing the plane to be placed.

Abstract: A projection apparatus including a casing, a lamp module, an imaging system and an optical engine is provided. The lamp module is disposed in the casing and includes a frame, a first fan, a plurality of light sources and a wind guiding device. The first fan is disposed on the frame and provides a cooling airflow. The light sources provide a light beams. The wind guiding device is disposed between the first fan and the frame, and has a baffle disposed on a flowing path of the cooling airflow to divide the cooling airflow into a plurality of cooling sub-airflows for cooling the light sources respectively. The imaging system and the optical engine are received in the casing and disposed on the transmission path of the light beam, and the optical engine is positioned between the lamp module and the imaging system.

Abstract: According to the invention, the image detection system contains optical channels arranged one next to the other with a respectively assigned microlens with aperture and in each case at least one detector located in the image plane, wherein the detectors are arranged such that the directions of the optical axes, which form in each case the connecting lines between lens apices and centre of the detectors, represent a function of the position of the respective optical channel, wherein at least one aperture stop arrangement (4) is provided between the microlenses (1?) with aperture (2?) and the detectors (6?, 8), wherein the distance between centres of the aperture stops (4?) is located between the distance between apices of the microlenses (1?) and distance between centres of the detectors (6?, 8) such that, depending on the position of the channels, the aperture stops (4?) are arranged with different offsets to the microlenses (1?) and the detectors (6?, 8) and are in each case located on a straight line with t

Abstract: A method includes passing a portion of an optical signal through an aperture of a sensor having a sensing element, wherein the portion of the optical signal that passes through the aperture is an inner portion of the optical signal and the portion of the optical signal that does not pass through the aperture is an outer portion of the optical signal; producing a sensed signal by sensing the outer portion of the optical signal with the sensing element; and controlling the source of the optical signal using the sensed signal. A system for implementing the method includes an optical energy source and a sensor having an optical sensing portion and an aperture therein. The system may also include an optical isolator, a detection element, and a controller for controlling the optical energy source. The system may be used within a MEMS-based system.

Abstract: A transient voltage occurring between output terminals during ON/OFF operation is reduced. There are provided a pair of input terminals IN1 and IN2, a pair of output terminals OUT1 and OUT2, MOSFETs N1 and N2 connected between the output terminals, and a drive circuit 10 connected between the input terminals IN1 and IN2 and the MOSFETs N1 and N2. A light-emitting diode D1 is connected between the input terminals IN1 and IN2. The MOSFETs N1 and N2 have their source electrodes electrically connected to each other and their drains connected to the output terminals OUT1 and OUT2 respectively. The drive circuit 10 includes a photodiode array FD1 that supplies a drive voltage to the gates of the MOSFETs N1 and N2, and a discharge circuit 11, connected between the gate electrodes and the source electrodes of the MOSFETs N1 and N2, that discharges electric charges accumulated on each gate electrode.

Abstract: A projection display apparatus that projects an image on a screen includes at least three light sources that emit light beams of different wavelengths, at least three optical units that convert the light beams emitted from the at least three light sources into substantially collimated light beams, a beam-combining unit that combines the light beams received at different angles from the at least three optical units into a single beam of light, and a scanning unit that scans the beam emitted from the beam-combining unit so as to allow the beam to enter the screen.

Abstract: An original laser-radiation beam having a symmetrical M2 but poor beam quality is sliced in one transverse axis, by a fanned-out stack of parallel transparent plates, into a plurality of beam slices. The beam-slices are also spread by the stack of plates in another transverse axis perpendicular to the first axis. A fanned-out stack of glass blocks aligns the spread beam-slices in the first axis to form what is effectively a single beam having an asymmetric M2, with beam quality improved in one axis and degraded in the other compared with the original beam. The effective single beam is projected into a line of radiation by a cylindrical lens, or by a homogenizing projector including spaced apart cylindrical lens arrays followed by a spherical condenser lens.

Abstract: There is provided a light source device which emits a bundle of rays with less diffused light and which is suitable for a projector, the light source device including a reflector whose inner surface is made to constitute a reflection surface, a lamp made up of a spherical light emitting portion and a sealing portion which is formed in such a manner as to pass through a center of the light emitting portion to project from the light emitting portion, and a conical mirror whose outer surface is made to constitute a reflection surface, which is formed into a cone shape and which covers a front sealing portion of the sealing portion of the lamp, wherein the light emitting portion of the lamp is disposed in a position where a focal point of the reflector resides.

Abstract: A positional sensor for a solar energy collection device includes a fine sensing device having first light-sensitive sensors supported above a base so that adjacent first light-sensitive sensors are oriented in mutually orthogonal directions at a sensor height above the base. The first light-sensitive sensors are positioned at oblique angles relative to the base. The sensor also includes a coarse sensing device having a light-opaque shield surrounding the first light-sensitive sensors that extends outwardly from the base to a height that is greater than the sensor height. The shield includes second light sensing devices directed outwardly from the shield and arranged so that adjacent second light-sensitive sensors are oriented in mutually orthogonal directions.

Abstract: A heliostat for the collection of solar energy while resting on a surface is disclosed, comprising a rigid disk having an exposed surface, a back surface, and a circular peripheral edge connecting the exposed surface to the back surface. The peripheral edge includes a plurality of wheels each having a rotational axis substantially tangent to the circular peripheral edge of the disk. Each wheel is driven by an electric motor electrically connected to a power source. A hollow, substantially transparent spherical enclosure contains the rigid disk. Each wheel of the disk frictionally engages an inner surface of the enclosure such that rotation of the any of the wheels changes the orientation of the disk within the enclosure. A control circuit is electrically disposed between the power source and each motor. The control circuit includes a direction setting means for causing the motors to orient the exposed surface substantially facing a commanded direction.

Abstract: Light emitted from a light source passes through a stellar base plate, a fixed aperture, and a wide-angled projection lens via a condenser lens and projects a starry sky on a screen. The stellar base plate is a light-shielding disk having a number of through holes which correspond to positions and brightness of actual stars, is supported by an inner ring of a ball bearing having the center at a position corresponding to the axis of rotation so as to be capable of rotating about the axis of rotation, and is driven by a motor via a belt. The centers of the projection lens, a window of the fixed aperture, the condenser lens, and the light source are all arranged on the optical axis, and the centers of the stellar base plate, the pulley and the ball bearing correspond to the axis of rotation.

Abstract: Disclosed herein is a projection type display apparatus, including: a color separation optical system configured to separate light from a light source into a plurality of light fluxes of different colors; a plurality of reflection type light valve devices provided individually for the color light fluxes; a plurality of polarization beam splitters each configured to polarize and separate a predetermined one of the color light fluxes separated by said color separation optical system and then polarize and separate the light coming in from the reflection type light valve device; and a light reception device provided for one or more of said polarization beam splitters and configured to detect light emitted from a second face from among faces of the predetermined polarization beam splitter which is opposite to a first face to which the predetermined color light flux from said color separation optical system is introduced.