Concept

Reflecting telescope

Related publications (48)

238 x 238 Micromechanical optical cross connect

This letter describes a 238x238 beam-steering optical cross connect constructed using surface micromachined mirrors. Its innovative optical configuration resulted in superior optical performance, achieving a mean fiber-to- fiber insertion loss of 1.33 dB a ...

2003

High-Al-content crack-free AlGaN/GaN Bragg mirrors grown by molecular-beam epitaxy

Nicolas Grandjean

We report on the growth by molecular-beam epitaxy on 2 in. sapphire substrates of crack-free AlxGa1-xN/GaN distributed Bragg reflectors (DBRs) with high-Al composition (x=0.5). This is achieved by introducing a thick AlN interlayer and strain mediating Aly ...

2003

Development of the Jungfraujoch multiwavelength lidar system for continuous observations of the aerosol optical properties in the free troposphere

Gilles Larchevêque

Climate changes and global warming are generally associated with the enhanced greenhouse effect, but aerosols can induce a cooling effect and thus regionally mask this warming effect. Unfortunately, the strong variability both in space and in time of the a ...

EPFL2002

Quantitative analysis of multichromatic moire effects in the superposition of coloured periodic layers

Roger Hersch, Isaac Amidror

In the present article we give a full quantitative analysis of the multichromatic moire effects in the superposition of coloured periodic layers, which is based both on the Fourier theory and on the theory of colorimetry and colour vision. This is done by ...

Taylor & Francis1997

Microendoscopic holography with flexible fiber bundle: experimental approach

Christian Depeursinge

An `in situ' holographic technique, based on the use of a flexible miniaturized endoscope (diameter less than 1 mm) has been developed for medical applications. The holographic process provides quantitative information on the 3-D geometry of the observed s ...

SPIE1993

Tissue investigation with optical coherence domain reflectometry

René Salathé, Fabienne Marquis Weible

Optical coherence domain reflectometry is applied here to the study of diffusive biological tissue. This non-contact technique allows us to probe the light reflected at a tissue interface, and the back scattered light through the tissue thickness, with ver ...

Publ by Int Soc for Optical Engineering1992

High-Resolution X-Ray Microscopy Using an Undulator Source, Photoelectron Studies with Maximum

Giorgio Margaritondo

We present the first results of high-spatial resolution x-ray imaging studies with an upgraded version of the scanning photoemission multiple application x-ray imaging undulator microscope. The microscope is a multilayer coated Schwarzschild objective that ...

1991

Michelson interferometer for detection of fast displacements of less than a quarter-wave over small areas

René Salathé

Coherent light is divided into a reference and a probing beam at a beam splitter. The reference mirror is mounted onto a piezoelectric transducer driven by a sawtooth generator triggered by a clock. The probing beam is focused by a lens onto the reflecting ...

1975

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