Ditemukan 5 dokumen yang sesuai dengan query
Achmad Harimawan, author
ABSTRAK
Telah dilakukan percobaan penerapan tapis pada cuplikan citra skala keabuan 8 bit [0-255] yang terkubur dalam bising elektronik akibat dari perekaman pada illumiasi rendah dengan metoda logaritmik, metoda homomorfik dan difinisi sendiri metoda konvolusi dikrit dengan beberapa penopeng [masking]. Disamping itu dilakukan juga pada cuplikan citra yang terkubur dalam bising...
1998
T-Pdf
UI - Tesis (Membership) Universitas Indonesia Library
Hidayat Wiriadinata, author
A nonconductor optical technique, having lateral resolution of about 5 μm and vertical resolution of about 0.09 μm, for surface profile (roughness) measurement was studied. It based on a heterodyne interferometer in which two orthogonal polarized beams of slightly different frequencies were used in a modified interference microscope. The beams...
Depok: Universitas Indonesia, 1992
T-Pdf
UI - Tesis (Membership) Universitas Indonesia Library
Hadi Sardjono, author
An unpolarized light beam will change to a linear polarized beam by using a polarizing filter. In turn the linear polarized beam can be rotated in an active medium such as glass if a magnetic field exists. This phenomenon, which is known as Faraday effect, is there for can used...
Depok: Universitas Indonesia, 1992
T-Pdf
UI - Tesis (Membership) Universitas Indonesia Library
Yusrandihardja, author
An experiment demonstrating the principle of mode recognition has been performed. In the experiment, a He-Ne laser with phase synchronized TEMo1 mode is used. This laser has two stable (bistable) states corresponding to be emission of a right- and left- hand helical waves. Injection of light of one state can...
Depok: Universitas Indonesia, 1992
T-Pdf
UI - Tesis (Membership) Universitas Indonesia Library
Boedi Soesatyo, author
ABSTRACT
For the purpose of optically cooling, trapping, detecting and accelerating Cesium atoms in a "fountain clock", semiconductor lasers with external resonator have been designed, built and tested in their spectral characteristic and their long-term frequency drift.
Multiple Quantum Well lasers with AR coating on one end face and a...
1992
T-Pdf
UI - Tesis (Membership) Universitas Indonesia Library
