F 002
Annex 21, page 1
The State Intellectual Property Office
of the People’s Republic of China
Project: F002
IPC: G11B7/12
Date: 26 May 2011
Consolidated Definitions Proposal
G11B7/12 HEADS
Definition statement
This subgroup covers：
Details of optical transducer assembly of recording or reproducing system;
Means for protecting the optical transducer assembly from environmental hazards
such as dust intrusion or sudden impacts;
Optical beam sources therefor, e.g. laser light source and power control thereof;
Optical detectors therefor,
Means for guiding optical beams;
Apparatus or processes for manufacturing optical transducer assembly.
References relevant to classification in this subgroup
This subgroup does not cover:
Disposition or mounting of head elements within housing or G11B 7/08
with provision for moving of light source, optical beam or
detector, irrelevant to the transducing method
Examples of places where the subject matter of this subclass is covered when
specially adapted, used for a particular purpose, or incorporated in a larger system:
Associated working of cameras or projectors with
G03B 31/00
sound-recording or -reproducing means
Sound-recording combined with cinematography
G03C 5/14
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Annex 21, page 2
Subtractive cinematographic processes combined with
G03C 7/24
sound-recording
Glossary of terms
In this subgroup, the following terms or expressions are used with the meaning
indicated:
Head
includes any means for converting
sinusoidal or non-sinusoidal electric
wave-forms into various of the optical
condition of at least the adjacent surface of
the record carrier, or vice versa
Synonyms and Keywords
In patent documents the terms "head" and "pickup" are often used as synonyms.
G11B 7/1245
Informative references
Attention is drawn to the following places, which may be of interest for search:
Electro-optic deflection; acousto-optic deflection
G02F 1/29
G02F 1/33
G11B 7/125
Informative references
Attention is drawn to the following places, which may be of interest for search:
Optical modulators; for controlling the intensity, phase or
direction of light
G02B 26/00
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Annex 21, page 3
G11B 7/126
Informative references
Attention is drawn to the following places, which may be of interest for search:
Control of laser output; control of semiconductor laser output
H01S 3/10
H01S 5/06
Stabilisation of laser output; stabilisation of semiconductor laser
output
H01S 3/13
H01S 5/068
G11B 7/127
Informative references
Attention is drawn to the following places, which may be of interest for search:
Lasers; semiconductor lasers
H01S 3/00
H01S 5/00
G11B 7/128
Informative references
Attention is drawn to the following places, which may be of interest for search:
Electro-optic, magneto-optic or acousto-optic modulators
G02F 1/00
Optical modulators
G02B 26/00
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Annex 21, page 4
G11B 7/13
Informative references
Attention is drawn to the following places, which may be of interest for search:
Optical detectors
G01J
Demodulating light, transferring the modulation of modulated
light, frequency changing of light
G02F 2/00
G11B 7/1353
Informative references
Attention is drawn to the following places, which may be of interest for search:
Diffraction gratings
G02B 5/18
Holograms used as optical elements
G02B 5/32
Grating systems
G02B 27/44
Holograms
G03H
G11B 7/1365
Special rules of classification
In this group, integrated combinations of a refractive element, such as a coating
element or phase plate, with another element, such as a lens, e.g. US 2009 0257338,
WO 2006 048818, EP 1 855 274 are classified in this group and in other appropriate
groups for the other element.
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Annex 21, page 5
G11B 7/1374
Informative references
Attention is drawn to the following places, which may be of interest for search:
Optical objectives
G02B 9/00
G11B 7/1376
Informative references
Attention is drawn to the following places, which may be of interest for search:
Collimators
G02B 27/30
G11B 7/1381
Informative references
Attention is drawn to the following places, which may be of interest for search:
Optical diaphragms
G03B 9/02
G11B 7/1387
Attention is drawn to the following places, which may be of interest for search:
Near-field optical probes
G01Q 60/18
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Annex 21, page 6
G11B 7/1392
Informative references
Attention is drawn to the following places, which may be of interest for search:
Optical systems for aberration correction
G02B 27/00
Objective lenses for reducing geometrical aberration
G02B 13/18
G11B 7/1395
Informative references
Attention is drawn to the following places, which may be of interest for search:
Beam splitting or combining systems
G02B 27/10
G11B 7/1398
Informative references
Attention is drawn to the following places, which may be of interest for search:
Optical diaphragms
G03B 9/02
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