Optical read-write head with diffraction grating structure
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United States of America Patent
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Jan 21, 1992
Grant Date -
N/A
app pub date -
Jul 10, 1989
filing date -
Jul 11, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a holographic optical component and its use for reading the writing/reading heads. This application requires a minimum size and low weight for the holographic optical components. This is achieved in accordance with the invention by arranging a laser element and a grating structure, which is integrated on a waveguide layer and acts as a holographic optical system, on a large-sized surface side of a flat carrier element such that a light beam of the laser element impinges directly on the grating structure and is so converted by the grating structure that it exits from the component.
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Patent Citation Ranking
- 47 Citation Count
- G02B Class
- 0 % this patent is cited more than
- 33 Age