Method and apparatus for determining a path difference in a Mich

Details Method and apparatus for determining a path difference in a Mich Method and apparatus for determining a path difference in a Mich

1992-04-27

1994-03-01

Housel, James C.

Optics: measuring and testing

By particle light scattering

With photocell detection

356345, G01B 902

Patent

active

052912680

ABSTRACT:
A method and an apparatus are provided for determining a path difference in a Michelson interferometer which comprises at least one reciprocably moving mirror element and an analog to digital converter, and which is provided for the determination of an electromagnetic spectrum without a laser having to be permanently used for that purpose. On the contrary, magnetic, optical and optomagnetical storage media are arranged parallelly to the travel path of the mirror element of the interferometer. A clock track is written on the storage medium in accordance with the sample theorem. In operation a pulse sequence derived from the clock track is read by a read head mounted on the movable mirror element and the desired clock pulse and thus the path information is derived therefrom.

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patent: 4799001 (1989-01-01), Burch
patent: 4870290 (1989-09-01), Deck
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patent: 5164788 (1992-11-01), Yoshikawa
patent: 5189491 (1993-02-01), Sogabe et al.
patent: 5194919 (1993-03-01), Katayama
patent: 5200797 (1993-04-01), Tank et al.

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