We Continue the Work of Those
Who Were the First.

  • Electrotechnics
  • Electrical Engineering
  • Light & Lighting
  • Power Engineering
  • Transportation
  • Automation
  • Communication
  • Smart Buildings
  • Industry
  • Innovation

Current issue

ELEKTRO 11/2021 was released on November 4th 2021. Its digital version will be available immediately.

Topic: Electrical switchboards and switchboard technologies, drives and power electronics

Main article
Electromobility in 2021

SVĚTLO (Light) 4-5/2021 was released 9.17.2021. Its digital version will be available 9.17.2021.

Lighting installations
Lighting reconstruction of underpass and platforms of Ústí nad Orlicí railway station

Public lighting
The lighting of park at Episcopal Residence of Ostrava-Opava in Ostrava
Outdoor lighting systems and intrusive light
Generel of public lighting 9th part
Environmental viewpoint

NASA Completes Webb Telescope Center of Curvature Pre-test

2. 11. 2016 | NASA | www.nasa.gov

Engineers and technicians working on the James Webb Space Telescope successfully completed the first important optical measurement of Webb’s fully assembled primary mirror, called a Center of Curvature test.

Taking a before optical measurement of the telescope’s deployed mirror is crucial before the telescope goes into several stages of rigorous mechanical testing. These tests will simulate the violent sound and vibration environments the telescope will experience inside its rocket on its way out into space.

Webb's telescope

In order to conduct the test, optical engineers set up an interferometer, the main device used to measure the shape of Webb’s mirror. Waves of visible light are less than a thousandth of a millimeter long, and optics like Webb’s need to be shaped and aligned even more accurately than this to work correctly. Scientists use wavelengths of light to make tiny measurements.

By measuring light reflected off the optics using an interferometer, they are able to measure extremely small changes in shape or position.  An interferometer gets its name from the process of recording and measuring the ripple patterns that result when different beams of light mix and their waves combine or interfere.

Read more at NASA

Image Credit: NASA

-jk-