Patent EP0071185A2 successfully refreshed from Google Patents.
EP0071185A2
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EP
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Laser apparatus
Assignee: Olympus Corp
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Filing: 1982-07-22
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Granted: —
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Expires: 2002-07-22
Abstract
Abstract A laser apparatus includes an operating laser oscillator (21) for generating an operating laser beam for medical treatment and a marker laser oscillator (24) for generating a visible laser beam (i.e., marker laser beam) in order to mark a portion of the body cavity to be treated. The marker laser beam is guided coaxial with the operating laser beam to become incident on a laser probe (16). The marker laser beam is intermittently shielded by a chopper (25). The shielded marker laser beam is reflected by a reflecting surface (28) of the chopper (25) and is guided to a photosensor (31). The operating laser oscillator (21) is driven in response to an output signal from the photosensor (31).
Inventors
- 👤 Akira Olympus Nishihachioji Takano
- 👤 Toru Takei
- 👤 Masato Toda
- 👤 Saichi Ichikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 14:35
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B17/00; A61B2017/00973; A61B2018/00636; A61B2018/2015; A61B2018/2025; A61B2018/2035; A61B2018/2045; A61B2018/2055
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
130 words
A laser apparatus comprising: an operating laser oscillator (21) for generating an operating laser beam; a marker laser oscillator (24) for generating a visible marker laser beam; means (23) for guiding the visible marker laser beam coaxially with the operating laser beam to a laser probe of an endoscope; chopping means (25, 41) for shielding and reflecting the visible marker laser beam from said marker laser oscillator (24) in a predetermined direction at a predetermined frequency; marker laser beam detecting means (31, 32) for detecting the visible marker laser beam shielded and reflected by said chopping means (25, 41) and for generating a detection signal; and energizing means (34, 35) for driving said operating laser oscillator (21) in response to the detection signal from said marker laser beam detecting means.
Claim 2
Dependent Claim
130 words
A laser apparatus comprising: an operating laser oscillator (21) for generating an operating laser beam; a marker laser oscillator (24) for generating a visible marker laser beam; means (23) for guiding the visible marker laser beam coaxially with the operating laser beam to a laser probe of an endoscope; chopping means (25, 41) for shielding and reflecting the visible marker laser beam from said marker laser oscillator (24) in a predetermined direction at a predetermined frequency; marker laser beam detecting means (31, 32) for detecting the visible marker laser beam shielded and reflected by said chopping means (25, 41) and for generating a detection signal; and energizing means (34, 35) for driving said operating laser oscillator (21) in response to the detection signal from said marker laser beam detecting means.
Claim 3
Dependent Claim
63 words
An apparatus according to claim 1, wherein said marker-laser beam chopping means comprises-a. chopper (25) which is interposed between said marker., laser oscillator (24) and said guiding means (23), which rotates at a predetermined speed, and which has a plurality of vanes (27) each having a reflecting surface (28) inclined with respect to a travelling direction of the visible marker laser beam (24).
Claim 4
Dependent Claim
67 words
An apparatus according to claim 1, wherein said marker-laser beam chopping means comprises a chopper plate (45) which is interposed between said marker laser oscillator (24) and said guiding means (23), which has a reflecting surface inclined with respect to the travelling direction of the visible marker laser beam, and which shields the visible marker laser beams at a predetermined frequency by pivoting at the predetermined frequency.
Claim 5
Dependent Claim
25 words
An apparatus according to claim 1, 2 or 3, wherein the predetermined frequency is in a range of several Hz to several tens of Hz.
Claim 6
Dependent Claim
82 words
An apparatus according to claim 1, 2 or 3, wherein said marker laser beam detecting means comprises a photosensor (31) receiving the visible marker laser beam reflected by said chopping means to convert the visible laser beam into the photoelectric signal of the predetermined frequency, and a one-shot multivibrator (51) which is connected to said photosensor (31), which has a time constant larger than a period of the photoelectric signal, and which is triggered at the predetermined frequency of the photoelectric signal.
Claim 7
Dependent Claim
88 words
An apparatus according to claim 1, 2, or 3, wherein said marker laser beam detecting means comprises a photosensor (31) receiving the visible marker laser beam reflected by said chopping means to convert the visible laser beam into the photoelectric signal of the predetermined frequency, a delay circuit (52) connected to said photosensor (31) to delay the photoelectric signal by 1/2 a period thereof, and means (53) for producing a NAND signal between an output signal from said delay circuit and the photoelectric signal from said photosensor (31).
Claim 8
Independent Claim
50 words
An apparatus according to any one of claims 1 to 6, wherein said energizing means comprises an energizing lamp (35) disposed near said operating laser oscillator (21) and means (34) for turning on said energizing lamp (35) in response to the detection signal from said marker laser beam detecting means.
Claim 9
Independent Claim
22 words
An apparatus according to any one of claims 1 to 7, wherein said operating laser oscillator (21) comprises a YAG laser oscillator.
Claim 10
Independent Claim
22 words
An apparatus according to any one of claims 1 to 8, wherein said marker laser oscillator (24) comprises a helium-neon laser oscillator.
Claim 11
Independent Claim
25 words
An apparatus according to any one of claims 1 to 9, wherein the predetermined frequency is in a range of several Hz to twenty Hz.
Claim 12
Independent Claim
26 words
An apparatus according to any one of claims 2 to 10, wherein said reflecting surface of said chopping means comprises an irregular reflecting surface (28a, 28b).
Claim 13
Dependent Claim
17 words
An apparatus according to claim 11, wherein said reflecting surface comprises an aveturine lacquer finished surface (28a).
Claim 14
Dependent Claim
27 words
An apparatus according to claim 11, wherein said irregular reflecting surface comprises a reflecting surface (28b) with a number of grooves extending along a circumferential direction thereof.
Claim 15
Independent Claim
20 words
An apparatus according to any one of claims 2 to 10, wherein said reflecting surface comprises a diffuse-reflecting surface (28c).
Claim 16
Dependent Claim
16 words
An apparatus according to claim 14, wherein said diffuse-reflecting surface comprises a curved reflecting surface (28c).
References Cited (Backward Citations)
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