Limiting device for electromagnetic radiation, notably in an...

Details Limiting device for electromagnetic radiation, notably in an... Limiting device for electromagnetic radiation, notably in an...

2007-07-24

2007-07-24

Porta, David (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

Reexamination Certificate

active

10482606

ABSTRACT:
A limiting device (9) for electromagnetic radiation (3; 5; 7) includes an essentially flat beam cross-section limiter (10) which partly or completely encloses at least one passage aperture (12; 13) for beams (5; 7) and is constructed so that it also includes at least one second beam cross-section limiter (14) which, in the active position, constitutes at least one longitudinal component extending at an angle to the first beam cross-section limiter (10).

REFERENCES:
patent: 6653645 (2003-11-01), Chen
patent: 62-226551 (1987-10-01), None

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