摘要:
Tunable filter arrays include an array of liquid crystal (LC) tunable Fabry-Perot (FP) microcavities. The microcavities are defined by first and second reflectors and an LC layer situated between the reflectors. The tunable filter is secured to an image sensor array so that the LC tunable microcavities are coupled to respective photodetectors of the image sensor array. Patterned electrodes are situated about the LC layer to tune the microcavities.
摘要:
Disclosed are digitally-switchable bandpass filters combining non-tunable retarder stacks with switchable liquid crystal cells. The disclosed filter embodiments function like a filter wheel with no moving parts that may provide faster switching, better image registration, compact size, and lower electrical power consumption. These benefits are attractive in portable handheld devices, such as bio-hazard sensors or glucose monitors.
摘要:
An image display device includes a light source unit (100) which successively emits illumination lights of different colors which have wavelength bands different from one another in accordance with color information of an image signal, an image modulating unit (200) which successively modulates the illumination lights of different colors in accordance with the color information of the image signal and generates modulated lights, a light path shift unit (300) capable of shifting a light path of the modulated lights, and a projection optical unit (400) which projects the modulated lights, wherein the light path shift unit includes a first wavelength selectable polarization rotation device (310) configured to carry out rotation control on polarization directions of the modulated lights modulated by the image modulating unit in accordance with colors and a first birefringent plate (320) to which the modulated lights from the first wavelength selectable polarization rotation device are applied.
摘要:
Die Erfindung bezieht sich auf eine Flüssigkristallanzeige zur Darstellung von hellen Zeichen und Mustern in einem dunklen Umfeld, mit einer ersten Super-Twisted-Nematik-Zelle 1 und einer zweiten Super-Twisted-Nematik-Zelle 2, die aneinander anliegend zwischen zwei unter etwa 90° zueinander ausgerichteten Polarisatoren 14 und 15 angeordnet sind. Die Zelle 1 und 2 bestehen aus transparenten Substraten 3, 4, 9, 11, zwischen denen mit einer STN-Flüssigkristallsubstanz gefüllte Zellenräume 5 und 10 gebildet sind. Diese sind von ihrer einem Beobachter 12 abgewandten Seite her von einer Lichtquelle 13 durchleuchtbar, wobei die erste Zelle 1 auf ihren Substraten 3 und 4 einander gegenüberliegende Elektroden 6 und 7 aufweist, die von einer Ansteuerspannung beaufschlagbar sind und wobei die erste und zweite Super-Twisted-Nematic-Zelle eine Doppel-Super-Twisted-Nematic-Zelle bilden, die einen steilen Anstieg ihrer Transmissionskurve im blauen Bereich des Lichtspektrums besitzt. Die Elektroden 6 und 7 sind von eine etwa völlige Durchschaltung der Helix der Flüssigkristallsubstanz bewirkenden hohen Ansteuerspannung beaufschlagbar und die Lichtquelle 13 ist eine weißes Licht mit einem Blauanteil emittierende Lichtquelle.
摘要:
According to the present invention the tunable optical device comprises a first optical wave guide and a second optical wave guide defining a space between the two wave guides with space comprises the first cell with liquid crystal material and a second cell with liquid crystal material spaced by a third wave guide and the first and the second cell for liquid crystal material having orientation of the liquid crystal material perpendicular to each other.
摘要:
There are provided at least two liquid crystal panels 10, 20 including the liquid crystals developing a memory effect, the liquid crystal developing a memory effect on a no-viewer side has a selective reflection wavelength set at 615 nm to 665 nm, the liquid crystal developing a memory effect on a viewer side has a selective reflection wavelength set at 490 nm to 540 nm, and a color filter 40 having a certain transmission property is provided between the liquid crystal developing a memory effect on the viewer side and the liquid crystal developing a memory effect on the no-viewer side.