Optical system with pivoting hologram

Details Optical system with pivoting hologram Optical system with pivoting hologram

1993-11-18

1996-06-11

Lerner, Martin

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 1, 359 17, 369 4421, G02B 532

Patent

active

055261442

ABSTRACT:
An optical data storage system includes a pivotally mounted hologram. Rotation of the hologram results in beam displacement at the optical medium for purposes of fine tracking. The hologram is designed and positioned relative to the focusing lens, such that the beam always passes through the center aperture of the lens even when the beam is displaced at the optical medium. Thus, the beam is not truncated at the focusing lens and loss of light and aberration problems are prevented.

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patent: 5202868 (1993-04-01), Terao et al.
patent: 5253245 (1993-10-01), Rabedeau

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