Patent US5751459A successfully refreshed from Google Patents.
US5751459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marking apparatus having feedback-controlled rotational laser beam
Assignee: Topcon Corp
•
Filing: 1996-08-14
•
Granted: 1998-05-12
•
Expires: 2016-08-14
Abstract
Abstract A rotating laser apparatus having a reciprocating laser scanning system which facilitates visual recognition of a laser beam on an object to be measured by raising an effective energy level on the object. In the apparatus the laser beam is rotated by a rotation device. The reciprocating laser scanning system includes a reflection members for reflecting the laser beam, a laser beam detector for detecting a return laser beam reflected from the reflection member, and a microcomputer for controlling a rotation of the rotation device in accordance with the output of the laser beam detector.
Inventors
- 👤 Fumio Ohtomo
- 👤 Hiroyuki Nishizawa
- 👤 Jun-ichi Kodaira
- 👤 Kenichirou Yoshino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:37
CPC Classifications
G; G01; G01C; G01C15/00; G01C15/002; G01C15/004
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
158 words
A laser beam irradiation apparatus comprising: a laser source for emitting a laser beam; laser beam projecting means for projecting the laser beam; scanning means for moving said laser beam projecting means and scanning the laser beam along a laser scanning path, said scanning means having a first mode and a second mode; reflecting means for reflecting the laser beam projected by said projecting means, said reflecting means including first and second reflection zones having a space therebetween along said laser scanning path; laser beam detecting means for detecting a return laser beam reflected from said reflecting means and producing an output based on detection of the return laser beam; and control means for changing operation of said scanning means from said first mode to said second mode based on the output of said laser beam detecting means when said laser beam detecting means detects a return laser beam from both of said first and second reflection zones.
Claim 2
Dependent Claim
158 words
A laser beam irradiation apparatus comprising: a laser source for emitting a laser beam; laser beam projecting means for projecting the laser beam; scanning means for moving said laser beam projecting means and scanning the laser beam along a laser scanning path, said scanning means having a first mode and a second mode; reflecting means for reflecting the laser beam projected by said projecting means, said reflecting means including first and second reflection zones having a space therebetween along said laser scanning path; laser beam detecting means for detecting a return laser beam reflected from said reflecting means and producing an output based on detection of the return laser beam; and control means for changing operation of said scanning means from said first mode to said second mode based on the output of said laser beam detecting means when said laser beam detecting means detects a return laser beam from both of said first and second reflection zones.
Claim 3
Dependent Claim
16 words
The laser beam irradiation apparatus of claim 1, wherein said first and second modes are different.
Claim 4
Dependent Claim
47 words
The laser beam irradiation apparatus of claim 1, wherein said control means functions to change the movement of said scanning means and pause the scanning of the laser beam on one of said first and second reflection zones when said scanning means is in said second mode.
Claim 5
Dependent Claim
51 words
The laser beam irradiation apparatus of claim 1, wherein said control means functions to change the movement of said scanning means and pause the scanning of the laser beam on one of said first and second reflection zones when said scanning means changes from said first mode to said second mode.
Claim 6
Dependent Claim
36 words
The laser beam irradiation apparatus of claim 1, wherein said control means functions to pause the scanning of the laser beam on one of said reflection zones when said scanning means is in said second mode.
Claim 7
Dependent Claim
29 words
The laser beam irradiation apparatus of claim 1, wherein said laser source emits a visible light so that the paused laser beam is usable as a reference light beam.
Claim 8
Dependent Claim
18 words
The laser beam irradiation apparatus of claim 1, wherein said first and second reflection zones are retroreflective members.
References Cited (Backward Citations)
US3515486A
Cited
US3591926A
Cited
US3488854A
Cited
US3815250A
Cited
US3634941A
Cited
US3778168A
Cited
US3790277A
Cited
US3865491A
Cited
US3742581A
Cited
US3819273A
Cited
US3823313A
Cited
US3907435A
Cited
US4062634A
Cited
US4053238A
Cited
US4035084A
Cited
US4251798A
Cited
US4293218A
Cited
US4426694A
Cited
US4484319A
Cited
US4441812A
Cited
US4498110A
Cited
US4706773A
Cited
US4732472A
Cited
US4712915A
Cited
US4766393A
Cited
US4830489A
Cited
US4790402A
Cited
US4846297A
Cited
US5051934A
Cited
US5216480A
Cited
US5151581A
Cited
US4907879A
Cited
US5030004A
Cited
US4970794A
Cited
US5313409A
Cited
US5055666A
Cited
US5010242A
Cited
JPH03105207A
Cited
US5123737A
Cited
US5204731A
Cited
US5018808A
Cited
US5047609A
Cited
EP0457548A2
Cited
US5132524A
Cited
US5084980A
Cited
US5294970A
Cited
US5221832A
Cited
US5331745A
Cited
US5347136A
Cited
US5294784A
Cited
US5347387A
Cited
US5319187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-11 | 2001-11-10 | 2002-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-11 | 2005-11-10 | 2006-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-11 | 2009-11-10 | 2010-05-12 | $7700.00 | Window Closed / Lapsed |