Beam catcher

Details Beam catcher Beam catcher

2007-12-11

2007-12-11

Pham, Hoa Q. (Department: 2886)

Optics: measuring and testing

Position or displacement

Position transverse to viewing axis

C250S208200

Reexamination Certificate

active

10858021

ABSTRACT:
A beam catcher (1) for a light beam (2) pulsating in amplitude at a modulation frequency (f) with a photodetector (4) with a plurality of photosensors (6) which are offset in a spatially defined manner relative to a reference point (5), an evaluating circuit (7), and an output device (8). A phase shifter (10) that is sensitive to the modulation frequency (f) is arranged between at least two photosensors (6).

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Search Report of the European Patent Office.

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