EP0214863A2
Expired / Lapsed
EP
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Light beam scanning apparatus
Assignee: Citizen Watch Co Ltd
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Filing: 1986-09-08
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Granted: —
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Expires: 2006-09-08
Abstract
Abstract The present invention provides a light beam scanning apparatus employing a resonance scanner mirror (1), in which scanning position error is substantially eliminated by utilizing only a part of the total range of angular movement of the mirror (1) to scan across the body (3) surface, and by appropriately selecting the total angle of oscillation of the mirror (1) in accordance with the amplitude of that part of the mirror (1) angular movement which is utilized for scanning.
Inventors
- 👤 Sadao C/O Tech. Lab. Of Citizen Watch C Masubuchi
- 👤 Naomichi C/O Tech. Lab. Of Citizen Watch C Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 06:23
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G02B26/0816
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A light beam scanning apparatus comprising a source (2) of a light beam (5); a condensor lens (4) through which said light beam is passed, a mirror (1) positioned to reflect said light beam (5) emerging from said condensor lens (4) onto a surface of a body (3), and resonance scanner means for vibrating said mirror (1) sinusoidally with a fixed period of vibration for thereby scanning said light beam (5) along a fixed scanning direction over successive positions on said body (3) surface, characterised in that, designating the amplitude of said sinusoidal vibration of said mirror (1) as <p m (degrees) and assuming that a scanning phase angle of said light beam (5) is zero when said light beam (5) falls upon a central position on said body (3) surface and that said scanning phase angle attains a value Θ w degrees) when said light beam (5) falls upon an outermost position on said body (3) surface, the following relationship is satisfied:
Claim 2
Dependent Claim
163 words
A light beam scanning apparatus comprising a source (2) of a light beam (5); a condensor lens (4) through which said light beam is passed, a mirror (1) positioned to reflect said light beam (5) emerging from said condensor lens (4) onto a surface of a body (3), and resonance scanner means for vibrating said mirror (1) sinusoidally with a fixed period of vibration for thereby scanning said light beam (5) along a fixed scanning direction over successive positions on said body (3) surface, characterised in that, designating the amplitude of said sinusoidal vibration of said mirror (1) as <p m (degrees) and assuming that a scanning phase angle of said light beam (5) is zero when said light beam (5) falls upon a central position on said body (3) surface and that said scanning phase angle attains a value Θ w degrees) when said light beam (5) falls upon an outermost position on said body (3) surface, the following relationship is satisfied:
References Cited (Backward Citations)
No citation records indexed.
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