Patent EP0250627A1 successfully refreshed from Google Patents.
Patent EP0560179B1 successfully refreshed from Google Patents.
EP0560179B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Laser light beam generating apparatus
Assignee: Sony Corp
•
Filing: 1993-03-02
•
Granted: 1998-05-20
•
Expires: 2013-03-02
Abstract
No abstract record available.
Inventors
- 👤 Naoya c/o Sony Corporation Eguchi
- 👤 Michio C/O Sony Corporation Oka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 22:01
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/37; H; H01; H01S; H01S3/00; H01S3/10; H01S3/106; H01S3/108; H01S3/109; H01S3/13; H01S3/139; H01S3/1398; G02F1/353; G02F1/3542
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
374 words
A laser light beam generating apparatus for converting the wavelength of a laser beam comprising: at least one laser beam source (11; 61; 71; 81) for emitting a laser beam; a first reflector (16; 66; 76; 86); a second reflector (17; 67; 77; 87) wherein said first (16; 66; 76; 86) and second (17;
67; 77; 87) reflectors form an optical resonator; a non-linear optical crystal element (18; 68; 78; 88) provided between said first (16;
66; 76; 86) and second (17; 67; 77; 87) reflectors, such that the optical path of a laser beam from said laser beam
source (11; 61; 11; 81) is incident on said non-linear optical crystal element (18;
68; 78; 88) through said first reflector (16; 66; 76; 86); actuating means (19; 69; 79; 89, 45) for actuating at least one of said first (16; 66;
76; 86) and second (17; 67; 77; 87) reflectors along an optical axis of the laser beam
emitted from said laser beam source (11; 61; 71; 81); a phase modulator (12) between said laser beam source (11; 61; 71; 81) and said first
reflector (16; 66; 76; 86); controlling means (21, 22, 23, 24, 25, 26) for driving said phase modulator (12; 62)
and controlling said actuating means (19; 69; 79; 89; 45) responsive to a driving
signal of said phase modulator (12; 62), wherein said controlling means (21, 22, 23, 24, 25, 26) comprises an oscillator (21)
generating the driving signal for said phase modulator (12; 62), a photodetector (23)
for receiving the laser beam by means of said first reflector (16; 66; 76; 86), a
synchronous detecting circuit (24) for detecting an output signal from said
photodetector (23) and the driving signal from said oscillator (21), and a low-pass filter (25,53) characterized in
that said synchronous detecting circuit (24) comprises a band-pass filter (51) supplied with
an output signal from said photodetector (23), a phase delay circuit (57) for delaying
the phase of said driving signal from said oscillator (21), a sample-and-hold circuit
(52) for sampling and holding an output signal from said band-pass filter (51)
responsive to an output signal from said phase delay circuit (57) and wherein said low-pass filter
is connected to an output from said sample-and-hold circuit.
Claim 2
Dependent Claim
46 words
A laser beam generating apparatus according to claim 1, wherein said actuating means
(19; 69; 79; 89; 45) comprises a reflector supporting member (32) for supporting said
reflector (31) and an electromagnetic actuator (33, 34, 35) for nioving said reflector
supported by said supporting member (32).
Claim 3
Dependent Claim
65 words
A laser beam generating apparatus according to claim 1 or 2, wherein said non-linear
optical crystal element (68) is provided in the optical axis of the laser beam source (61) and
said optical resonator further comprises a plane mirror (63) provided off the optical
axis of the laser beam source (61), and wherein said first (66) and second (67)
reflectors each comprise a concave mirror.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.