Variable optical attenuator

Details Variable optical attenuator Variable optical attenuator

1985-05-28

1986-05-27

Lee, John

350 9620, 350315, G02B 522, G02B 632

Patent

active

045912319

ABSTRACT:
The variable optical attenuator (1) comprises two spherical lenses (7, 8), one at the input end and one at the output end, between which a bundle of parallel rays is present. A disk (4) having areas (9) with neutral density filters (10) of different attenuation is rotatable through the bundle of rays. A locking mechanism (13, 14, 15) acts on a stub shaft (11) at the disk (4), and its stop positions correspond to the locations of the areas (9). This permits the attenuation of the attenuator (1) to be adjusted in steps.

REFERENCES:
patent: 4193662 (1980-03-01), Hara
patent: 4261640 (1981-04-01), Stankos et al.
patent: 4327963 (1982-05-01), Khoe et al.

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