Abstract:
Die Erfindung schlägt eine Beleuchtungsvorrichtung (1) mit einer Anregungslichtquelle (2) und einer Wellenlängenkonversionsanordnung vor, wobei die Wellenlängenkonversionsanordnung so ausgelegt ist, dass das Anregungslicht (3) nicht nur zu Konversionslicht wellenlängenkonvertiert wird sondern zusätzlich und gezielt, zumindest zeitweise und mindestens teilweise unkonvertiert, d.h. spektral unverändert, als Reflexionslicht (3) reflektiert wird. Dazu weist die Wellenlängenkonversionsanordnung zumindest ein Reflexionselement (7) auf, um das Reflexionslicht (3) auf einen vom Anregungslichtpfad und Konversionslichtpfad räumlich getrennten Reflexionslichtpfad zu lenken. Mit Hilfe eines dichroitischen Spiegels (4) wird das Konversionslicht einerseits vom Anregungslicht getrennt und andererseits mit dem umgelenkten Reflexionslicht (3) zusammengeführt.
Abstract:
A compact and efficient optical illumination system featuring planar multi-layered LED light source arrays concentrating their polarized or unpolarized output within a limited angular range. The optical system manipulates light emitted by a planar light emitters such as electrically-interconnected LED chips. Each light emitting region in the array is surrounded by reflecting sidewalls whose output is processed by elevated prismatic films, polarization converting films, or both. The optical interaction between light emitters, reflecting sidewalls and the elevated prismatic films create overlapping virtual images between emitting regions that contribute to the greater optical uniformity. Practical illumination applications of such uniform light source arrays include compact LCD of DMD video image projectors, as well as general lighting, automotive lighting, and LCD backlighting.
Abstract:
A broadband area-division beamsplitter that includes a pair of abutting triangular prisms (51 and 53) providing two surfaces that are in optical contact in certain areas and are out of optical contact in other areas. One prism surface (57) is substantially planar while adjoining surface (55) of the other prism has alternating protrusions and depressions. The two surfaces are oriented on a diagonal so that light incident through one of the other prism faces is incident on the adjoining surfaces at an angle larger than the critical angle, providing total internal reflection at the out-of-contact gap regions. The protrusions and depressions on the one prism surface may be in the form of a corrugation (Fig. 4) or a checkerboard (Fig. 5) or some other patterns.
Abstract:
Examples of the present disclosure relate to an apparatus and method for near eye display. In some examples, there is provided an apparatus configured for use in a near eye display, the apparatus comprising: means configured to provide stenopeic viewing; and means configured to reflect an image to a user's eye.
Abstract:
A recycling system and method for increasing the brightness of light output using at least one recycling light pipe with at least one light source. The output end of the recycling light pipe reflects a first portion of the light back to the light source, a second portion the light to the input end of the recycling light pipe, and transmits the remaining portion of the light as output. The recycling system is incorporated into a projector to provide color projected image with increased brightness. The light source can be white LEDs, color LEDs, and dual paraboloid reflector (DPR) lamp.
Abstract:
A method and apparatus are provided for attenuating an optical beam. The method includes selecting a level of attenuation to be applied to the optical beam. A pattern of on-state and off-state pixels in a two dimensional spatial light modulator (SLM) is selected such that the pattern will modulate the optical beam to provide the selected level of attenuation. Finally, the optical beam is directed onto the SLM while the pixels are arranged in the selected pattern. The pattern is periodic along a first axis and symmetric along a second axis along which an intensity distribution of the optical beam extends.
Abstract:
A reconfigurable optical channel monitor selects and determines a parameter of desired optical channel(s) from and/or to an optical WDM input signal. The OCM includes a spatial light modulator having a micro-mirror device with a two-dimensional array of micro-mirrors that tilt between first and second positions in response to a control signal from a controller in accordance with a switching algorithm and an input command. A collimator, diffraction grating, and Fourier lens collectively converge the optical input channels onto the micro-mirrors array. The optical channel is focused onto a plurality of micro-mirrors. To select each input channel, a group of micro-mirrors associated with each desired input channel is tilted to reflect the desired input channel back along the return path to a photodetector and processing unit to determine a parameter of the selected input signal.
Abstract translation:可重新配置的光学信道监视器选择并确定来自光学WDM输入信号和/或光学WDM输入信号的期望光学信道的参数。 根据切换算法和输入命令,OCM包括具有微镜器件的空间光调制器,微镜器件具有响应于来自控制器的控制信号在第一和第二位置之间倾斜的微镜的二维阵列。 准直器,衍射光栅和傅立叶透镜将光学输入通道集中在微镜阵列上。 光通道聚焦到多个微镜上。 为了选择每个输入通道,倾斜与每个期望输入通道相关联的一组微反射镜,以沿着返回路径将所需输入通道反射回光电探测器和处理单元以确定所选输入信号的参数。 p >
Abstract:
A multiwavelength selector for use with a high speed performance monitor, that uses a spatial wavelength separator, a configurable spatial filter, a focusing assembly, and a photodetector to select a wavelength or wavelengths from a plurality of incoming wavelengths, for further processing by said high speed performance monitor. The invention is intended for use in fiber optic network application.
Abstract:
Die Erfindung betrifft eine Vorrichtung zur Aufteilung eines Laserstrahls, insbesondere eines Hochleistungslaserstrahls wie eines CO 2 -Lasers mit einem Wellenlängenbereich von 9 bis 1 µm, insbesondere 10,6 µm. Durch die Erfindung wird erstmals eine Vorrichtung zur Strahlaufteilung eines optischen Strahls und insbesondere eines Laserstrahls vorgeschlagen, die eine variable Strahlteilung eines Laserstrahls hoher Leistung und noch dazu einen simultanen Betrieb der beiden Laserstrahlteile möglich macht. Dazu werden in einem rotierenden Spiegelsystem zumindest zwei Spiegelblöcke vorgeschlagen.
Abstract:
A projection system is characterized by: a first light source unit and a second light source unit selectively driven in response to operation mode; a light transmitting unit transmitting light emitted from the first light source unit or the second light source unit in the form of surface light; an image generator generating an image in response to an image signal using the light transmitted from the light transmitting unit; and a projection lens system projecting the image by enlarging the image generated by the image generator and projecting the enlarged image.