Light guides
نویسندگان
چکیده
منابع مشابه
Planar Leaky Light-Guides and Couplers
A quantitative theory of light propagation in a dielectric slab guide with general cladding media is presented. It is based on a plane wave which bounces in a zigzag fashion along the guide as a result of total or partial reflections at the two surfaces of the film. Two mechanisms are considered which contribute to the attenuation of the guide: losses due to absorption in the slab and cladding ...
متن کاملPlanar Lipid Bilayers as Light Guides
T h e light guide properties of p lanar lipid bi layers are discussed a n d e x p e r i m e n t a l l y verified. T h e interaction b e t w e e n the light a n d the const i tuents of t h e bi layer is substant ia l ly increased since the l ight p a t h is as large as the d iameter o f the film, e . g . of the order o f several mil l imeters . T h e influence o f electric fields o n the bi laye...
متن کاملStem cell activation by light guides plant organogenesis.
Leaves originate from stem cells located at the shoot apical meristem. The meristem is shielded from the environment by older leaves, and leaf initiation is considered to be an autonomous process that does not depend on environmental cues. Here we show that light acts as a morphogenic signal that controls leaf initiation and stabilizes leaf positioning. Leaf initiation in tomato shoot apices ce...
متن کاملCMOS X-rays detector array based on scintillating light guides
This paper describes a pixel imaging array consisting in 400 m × 400 m photodiodes fabricated in CMOS technology. An array of scintillating CsI:Tl crystals is placed above the photodiodes. These crystals are encapsulated in aluminum walls, forming a light path that guides the visible light produced by the scintillating crystal into the photodiodes. In this way, the X-ray energy is first convert...
متن کاملA Demonstration of Light Guides for Light Detection in Liquid Argon TPCs
Liquid Argon (LAr) Time Projection Chambers (TPCs) are a developing technology that is becoming a popular choice for neutrino and dark matter experiments due to the low cost of the LAr as a target material and the high signal efficiency and background rejection that these detectors can achieve. When excited by a passing charged particle created in a neutrino interaction, argon produces scintill...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1989
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(17)31212-7