Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Heinrich A. Hoefler"'
Publikováno v:
SPIE Proceedings.
This paper reports a theoretical description of a recently proposed length sensor using the laser-feedback technique. It is found that the optical feedback causes a sinusoidal fluctuation of the emission frequency with respect to time. The amplitude
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a8770ddb31b3594734cef40e371f681
https://doi.org/10.1117/12.364287
https://doi.org/10.1117/12.364287
Publikováno v:
Three-Dimensional Image Capture and Applications
The acquirement of 3D-information is currently achieved by stereophotography, line and grid projection techniques or bylaser scanning in combination with a fast distance measuring device.This paper describes a new principle using a single CCD-camera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e18c78000e0d84fff703540572b5c9ba
https://doi.org/10.1117/12.341068
https://doi.org/10.1117/12.341068
Publikováno v:
SPIE Proceedings.
We present a novel velocity and length measuring instrument based on laser-feedback interferometry. Uncertainties down to 10-4 in length measurement of moving materials can be achieved by combining the measurement signals of two separate sensors. Fur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4273779de106f2c2c4f9d4a2eaae3e8c
https://doi.org/10.1117/12.307686
https://doi.org/10.1117/12.307686
Autor:
Gerhard Schmidtke, Heinrich A. Hoefler
Publikováno v:
SPIE Proceedings.
The Optical Radar System (ORAS) provides a complete set of data to derive three-dimensional surface contours of bodies or of body-like scenes primarily in industrial environment. In addition, the intensity as back-scattered from the object is recorde
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66d84c1bf3582866a89f3188f02c82a4
https://doi.org/10.1117/12.196097
https://doi.org/10.1117/12.196097
Publikováno v:
Tenth International Conference on Optical Fibre Sensors.
In the present paper an attempt has been made to immerse the micromechanical resonant structure in the gas medium and investigate the pressure and temperature sensitivities. By means of a closed loop between the exciting laser diode source,the mechan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::042d813b2bf15fab13269463a3b14ff0
https://doi.org/10.1117/12.185082
https://doi.org/10.1117/12.185082
Publikováno v:
SPIE Proceedings.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68f00dccafc382feaaf987f1cb53e349
https://doi.org/10.1117/12.198848
https://doi.org/10.1117/12.198848
Autor:
Heinrich A. Hoefler, Gerhard Schmidtke
Publikováno v:
SPIE Proceedings.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01aa37cc5ff10e2b8c4f9476e150345b
https://doi.org/10.1117/12.168055
https://doi.org/10.1117/12.168055
Autor:
Heinrich A. Hoefler, M. Seib
Publikováno v:
ICALEO '89: Optical Sensing and Measurement.
A new type of moire reference grid on the surface of a CCD-chip is presented. In surface contouring an improvement of the resolution by a factor of 4 is achieved. The modification steps to generate the new reference grid are simple. Any further modif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48b1c984d803d3123cf227637b6dd169
https://doi.org/10.1117/12.35029
https://doi.org/10.1117/12.35029
Interferometric displacement measurement with automatic compensation ofinfluences of the ambient air
Publikováno v:
ICALEO '89: Optical Sensing and Measurement.
Fluctuations of the refractive index of air causes nowadays the largest errors in high precise interferometric displacement measuring systems. We present in this paper a new method for compensating these influences by tuning the optical frequency of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a773c5098a8f4f68177b3c560c0d9fd2
https://doi.org/10.1117/12.35035
https://doi.org/10.1117/12.35035