Abstract: Rotary position sensors are provided. In one example implementation, a rotary position sensor can include a first member and a second member, one of the first and second members having a transmit aerial and a receive aerial and the other of the first and second members having an intermediate coupling element. The receive aerial has at least one receive conductive winding arranged to form a first set of current loops and a second set of current loops. The intermediate coupling element comprises a conductive material arranged in a pattern. The pattern of the intermediate coupling element and the layout of the first and second set of current loops are mutually arranged such that any electromotive force induced in the first set of current loops by a background magnetic field is substantially balanced by an electromotive force induced in the second set of current loops by the background magnetic field.

Abstract: Image contrast of a projected image on a screen can be adjusted by configuring a lens aperture element in a projector. A projector can be set in a theatre to emit projected light representing the projected image onto the screen. The projected image can be projected onto the screen in the theatre such that a light level of the projected light is at a target light level. The lens aperture element in a projection lens of the projector can be configured to change an image contrast of the projected image. In response to inserting the lens aperture element, a setting for a light emitter in the projector can be adjusted such that the light level of the projected light is at the target light level.

Abstract: A system may include a projector subsystem in a theatre projecting fight toward a screen, a sensor measuring light levels of the projected light, and a processing device. The projector subsystem may project light such that there is a hazardous light area and a non-hazardous light area of an audience seating area. The processing device may receive a measured light level of projected light from the sensor. The processing device may determine a second light level between the hazardous light area and the non-hazardous light area based on the measured light level and the position of the light projected over the audience seating area. The processing device may compare the second light level to an unsafe threshold light level. The processing device may determine a configuration for the system such that the light level of projected light in the non-hazardous light area is less than the unsafe threshold light level.

Abstract: A method is disclosed for maintaining a desired optical output in a solid state illumination device, where the device is configured to accommodate multiple light emitting diodes (LEDs) and to combine light from the LEDs to produce a single optical output. The method includes testing the LEDs before adding them into the device. The testing produces characterizing information that describes how one or more optical properties (e.g., optical power and/or peak wavelength) of the tested LED change with temperature. This characterizing information is stored in a computer-based memory of the device, and the tested LED is added (connected) into the device. Then, during operation, temperature sensors measure a temperature associated with each respective LED in the device, and electrical current to one or more of the LEDs can be adjusted based on the measured temperatures associated with each LED and its stored characterizing information.

Abstract: A method is disclosed for maintaining a desired optical output in a solid state illumination device, where the device is configured to accommodate multiple light emitting diodes (LEDs) and to combine light from the LEDs to produce a single optical output. The method includes testing the LEDs before adding them into the device. The testing produces characterizing information that describes how one or more optical properties (e.g., optical power and/or peak wavelength) of the tested LED change with temperature. This characterizing information is stored in a computer-based memory of the device, and the tested LED is added (connected) into the device. Then, during operation, temperature sensors measure a temperature associated with each respective LED in the device, and electrical current to one or more of the LEDs can be adjusted based on the measured temperatures associated with each LED and its stored characterizing information.

Abstract: An illumination system includes a phosphor to emit light in a wavelength band ??PHOSPHOR, a second light source to emit light at a second wavelength ?2 within an absorption band of the phosphor, a third light source to emit light at a third wavelength ?3 and a fourth light source to emit light at a fourth wavelength ?4. A controller drives the second, third and fourth light sources. A first dichroic optical element: 1) directs light from the phosphor to an optical output of the system, 2) directs light from the third light source to the optical output, and 3) directs light from the fourth light source to the optical output. A second dichroic optical element: 1) directs light from the third light source to the first dichroic optical element, and 2) directs the light from the fourth light source to the first dichroic optical element.

Abstract: A dispensing and ultraviolet (UV) curing system is disclosed with low backscatter. The system includes a dispenser for dispensing an ultraviolet (UV) curable material onto a substrate and a UV radiation source assembly coupled to the dispenser and operable to facilitate curing the UV curable material that has been dispensed onto the substrate. The UV radiation source assembly has a UV radiation source with a first optical axis and an optical element with a second optical axis. The second optical axis is different than the first optical axis. The optical element is configured such that, during operation, UV radiation from the UV radiation source passes through the optical element.

Abstract: An illumination system includes a phosphor to emit light in a wavelength band ??PHOSPHOR, a second light source to emit light at a second wavelength ?2 within an absorption band of the phosphor, a third light source to emit light at a third wavelength ?3 and a fourth light source to emit light at a fourth wavelength ?4. A controller drives the second, third and fourth light sources. A first dichroic optical element: 1) directs light from the phosphor to an optical output of the system, 2) directs light from the third light source to the optical output, and 3) directs light from the fourth light source to the optical output. A second dichroic optical element: 1) directs light from the third light source to the first dichroic optical element, and 2) directs the light from the fourth light source to the first dichroic optical element.

Abstract: An illumination system includes a phosphor to emit light in a wavelength band ??PHOSHPOR, a second light source to emit light at a second wavelength ?2 within an absorption band of the phosphor, a third light source to emit light at a third wavelength ?3 and a fourth light source to emit light at a fourth wavelength ?4. A controller drives the second, third and fourth light sources. A first dichroic optical element: 1) directs light from the phosphor to an optical output of the system, 2) directs light from the third light source to the optical output, and 3) directs light from the fourth light source to the optical output. A second dichroic optical element: 1) directs light from the third light source to the first dichroic optical element, and 2) directs the light from the fourth light source to the first dichroic optical element.

Abstract: A high power microscopy illumination system is disclosed, having a liquid cooled, Solid State Light Source (SSLS) unit including one or more LED light sources, thermally mounted on a cold plate, which is cooled by a closed-loop liquid cooling system including a remote unit housing a heat exchanger. The SSLS unit with the LED light source is compact and lightweight, and is mechanically and optically directly coupled to the illumination port of the microscope, for efficient optical coupling to the imaging plane. High capacity cooling of the LEDs, enables the LEDs to be driven at higher current densities for increased optical output and for operation with improved thermal stability. The LED driver circuitry may also be housed within the SSLS unit and liquid cooled. The SSLS unit is vibrationally isolated from vibration-causing components of the cooling system, such as cooling fans and other bulky components, which are housed in the remote unit.

Abstract: An illumination system includes a phosphor to emit light in a wavelength band ??PHOSPHOR, a second light source to emit light at a second wavelength ?2 within an absorption band of the phosphor, a third light source to emit light at a third wavelength ?3 and a fourth light source to emit light at a fourth wavelength ?4. A controller drives the second, third and fourth light sources. A first dichroic optical element: 1) directs light from the phosphor to an optical output of the system, 2) directs light from the third light source to the optical output, and 3) directs light from the fourth light source to the optical output. A second dichroic optical element: 1) directs light from the third light source to the first dichroic optical element, and 2) directs the light from the fourth light source to the first dichroic optical element.

Abstract: A device for increasing the optical power of a solid state light source in the green and/or yellow bands, is disclosed. The device has an integral body having an ingress surface configured to receive light from an emitting portion of the solid state light source, an egress surface substantially opposite the ingress surface, and a recess formed within the body. The recess has an input opening in the ingress surface, an output opening in the egress surface, and a recess surface within the body extending between the input opening and the output opening. The recess surface is configured to reflect visible light with Lambertian scatter characteristics.

Abstract: A device for increasing the optical power of a solid state light source in the green and/or yellow bands, is disclosed. The device has an integral body having an ingress surface configured to receive light from an emitting portion of the solid state light source, an egress surface substantially opposite the ingress surface, and a recess formed within the body. The recess has an input opening in the ingress surface, an output opening in the egress surface, and a recess surface within the body extending between the input opening and the output opening. The recess surface is configured to reflect visible light with Lambertian scatter characteristics.

Abstract: A device for increasing the optical power of a solid state light source in the green and/or yellow bands, is disclosed. The device has an integral body having an ingress surface configured to receive light from an emitting portion of the solid state light source, an egress surface substantially opposite the ingress surface, and a recess formed within the body. The recess has an input opening in the ingress surface, an output opening in the egress surface, and a recess surface within the body extending between the input opening and the output opening. The recess surface is configured to reflect visible light with Lambertian scatter characteristics.

Abstract: A high power microscopy illumination system is disclosed, having a liquid cooled, Solid State Light Source (SSLS) unit including one or more LED light sources, thermally mounted on a cold plate, which is cooled by a closed-loop liquid cooling system including a remote unit housing a heat exchanger. The SSLS unit with the LED light source is compact and lightweight, and is mechanically and optically directly coupled to the illumination port of the microscope, for efficient optical coupling to the imaging plane. High capacity cooling of the LEDs, enables the LEDs to be driven at higher current densities for increased optical output and for operation with improved thermal stability. The LED driver circuitry may also be housed within the SSLS unit and liquid cooled. The SSLS unit is vibrationally isolated from vibration-causing components of the cooling system, such as cooling fans and other bulky components, which are housed in the remote unit.

Abstract: A device for increasing the optical power of a solid state light source in the green and/or yellow bands, is disclosed. The device has an integral body having an ingress surface configured to receive light from an emitting portion of the solid state light source, an egress surface substantially opposite the ingress surface, and a recess formed within the body. The recess has an input opening in the ingress surface, an output opening in the egress surface, and a recess surface within the body extending between the input opening and the output opening. The recess surface is configured to reflect visible light with Lambertian scatter characteristics.

Abstract: A dispensing and ultraviolet (UV) curing system is disclosed with low backscatter. The system includes a dispenser for dispensing an ultraviolet (UV) curable material onto a substrate and a UV radiation source assembly coupled to the dispenser and operable to facilitate curing the UV curable material that has been dispensed onto the substrate. The UV radiation source assembly has a UV radiation source with a first optical axis and an optical element with a second optical axis. The second optical axis is different than the first optical axis. The optical element is configured such that, during operation, UV radiation from the UV radiation source passes through the optical element.

Abstract: An illumination system includes a phosphor to emit light in a wavelength band ??PHOSPHOR, a second light source to emit light at a second wavelength ?2 within an absorption band of the phosphor, a third light source to emit light at a third wavelength ?3 and a fourth light source to emit light at a fourth wavelength ?4. A controller drives the second, third and fourth light sources. A first dichroic optical element: 1) directs light from the phosphor to an optical output of the system, 2) directs light from the third light source to the optical output, and 3) directs light from the fourth light source to the optical output. A second dichroic optical element: 1) directs light from the third light source to the first dichroic optical element, and 2) directs the light from the fourth light source to the first dichroic optical element.

Abstract: A high power microscopy illumination system is disclosed, including a solid state illumination source. A diffusing collection lens having a diffusing surface is configured to collect and diffuse light emission from the solid state illumination source. An emitting surface is disposed substantially opposite the diffusing surface. An optical coupling element couples the light emission from the diffusing collection lens emitting surface along an optical axis to an optical output. The diffusing collection lens provides improved uniformity of illumination with direct coupling, without significant power loss.

Abstract: A solid state illumination system is disclosed, wherein a light source module comprises a first light source, comprising an LED and a phosphor layer, the LED emitting a wavelength ?1 in an absorption band of the phosphor layer for generating longer wavelength broadband light emission from the phosphor, ??PHOSPHOR, and a second light source comprising a laser emitting a wavelength ?2 in the absorption band of the phosphor layer. While operating the LED, concurrent laser pumping of the phosphor layer increases the light emission of the phosphor, and provides high brightness emission, e.g. in green, yellow or amber spectral regions. Additional modules, which provide emission at other wavelengths, e.g. in the UV and near UV spectral bands, together with dichroic beam-splitters/combiners allow for an efficient, compact, high-brightness illumination system, suitable for fluorescence imaging and analysis.