OPTICAL HEAD UNIT

An optical head for an optical recording reproducing system comprises a light source 1, a first optical means 4 for introducing a light beam from the light source into a guide groove 3 formed in a recording surface of an information carrier 2, and a second optical means 5 for separating a reflected...

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Bibliographic Details
Main Authors TADOKORO MICHIHIRO, KOYANAKI KIMIYUKI, ARAI RYUICHRO, IMAI HITOSHI
Format Patent
LanguageEnglish
Korean
Published 29.09.1990
Edition5
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:An optical head for an optical recording reproducing system comprises a light source 1, a first optical means 4 for introducing a light beam from the light source into a guide groove 3 formed in a recording surface of an information carrier 2, and a second optical means 5 for separating a reflected light beam reflected from the guide groove from the light beam from the light source. The optical head also comprises an optical element 16 in particular a prism having formed thereon at its center a cylindrical surface 16b and on both sides slanted surfaces 16a, 16c for dividing the reflected light beam into three, and a light receiving element 8 having at least three light receiving units 9-11 for receiving the respective light beams divided into three by the optical element.
Bibliography:Application Number: KR19870011584U