4. Optics: measuring and testing
  5. By dispersed light spectroscopy
  6. Utilizing a spectrometer

Fritz Keilmann

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Attenuator for optical radiation

Electric heating – Microwave heating – Tunnel furnace
Patent

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Coherent periodically pulsed radiation spectrometer

Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
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Frequency triplicator for microwaves

Wave transmission lines and networks – Frequency multipliers
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Non-self supporting optical device with support structure

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Polarizer for infrared radiation

Optical: systems and elements – Having significant infrared or ultraviolet property – Having polarizing element
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