Optical unit having a radiation source, a detector and a grating

Details Optical unit having a radiation source, a detector and a grating Optical unit having a radiation source, a detector and a grating

1996-03-28

1998-01-27

Nelms, David C.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4412, 369103, 369109, 369122, G11B 700

Patent

active

057128413

ABSTRACT:
An optical unit includes a first holder with a radiation source, a second holder with a radiation-sensitive detector, a grating, and a mirror. The unit further includes a cylindrical mounting having a cylinder axis and a wall oriented transversely to the cylinder axis, the grating and the mirror being formed by optically transparent wall portions of the wall. The mounting has a first positioning surface to which the first holder with the radiation source is secured and a second positioning surface to which the second holder with the radiation-sensitive detector is secured.

REFERENCES:
patent: 5029255 (1991-07-01), Opheij et al.
patent: 5068751 (1991-11-01), Braat et al.
patent: 5161148 (1992-11-01), Hori et al.
patent: 5442616 (1995-08-01), Ogata et al.
patent: 5446719 (1995-08-01), Yoshida et al.
patent: 5566157 (1996-10-01), Kojima et al.

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