US 2010/0073750 A1Published application

Beam irradiation apparatus

AssigneesSanyo Electric Co., Ltd., Sanyo Optec Design Co., Ltd.

InventorsAtsushi YAMAGUCHI, Masato Yamada, Yoshiaki Maeno

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Abstract

A light refracting element formed in parallel plate shape is attached to a support shaft of a mirror holder, a semiconductor laser and a PSD are disposed at positions between which the light refracting element is sandwiched. The light refracting element is rotated by rotation of the mirror holder, and whereby a laser beam irradiation position is changed on a light acceptance surface of PSD. The laser beam irradiation position on a light acceptance surface corresponds to the mirror rotation position, so that the mirror rotation position and a laser beam scanning position in a target area can be detected based on an output from the PSD.

Claims5

Dependent claims

A beam irradiation apparatus comprising:

a mirror;
a mirror holder which holds the mirror;
a first retaining member in which the mirror holder is journaled while being rotatable in a first direction;
a second retaining member in which the first retaining member is journaled while being rotatable in a second direction perpendicular to the first direction;
an electromagnetic driving unit which drives the first and second retaining bodies in the first and second directions respectively;
a light refracting element which is integrally provided in the mirror holder;
a servo light source which irradiates the light refracting element with servo light;
and
a photodetector which accepts the servo light refracted by the light refracting element and outputs a signal according to a light acceptance position.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/047,038Filed 12 Mar 2008
Priority: JP 2007-6292413 Mar 2007
Published: 25 Mar 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G01S 7/4811
Constructional features, e.g. arrangements of optical elements: common to transmitter and receiver
G01S 7/4816
Constructional features, e.g. arrangements of optical elements: of receivers alone
G01S 7/4817
Constructional features, e.g. arrangements of optical elements: relating to scanning
G01S 7/491
Of systems according to group G01S17/00: details of non-pulse systems

Family

US 7,773,277 B2Related patent
US 2010/0073750 A1This patent

From the US filing history. Foreign family members aren’t listed.

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