Optical scanning apparatus, optical writing apparatus, image forming apparatus, and method of driving vibration mirror
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Accused Products
Abstract
An optical scanning apparatus includes a vibration mirror having a mirror surface that reflects an optical beam. A pair of torsion beams swingably support the mirror. The mirror is vibrated in a sealed space whose pressure is adjusted such that a characteristic of the mirror falls within a predetermined range.
34 Citations
60 Claims
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1-23. -23. (canceled)
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24. An optical scanning apparatus, comprising;
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a vibration mirror having a mirror surface that reflects an optical beam and vibrated in a vibration space formed in said optical scanning apparatus; and
a pair of torsion beams swingably supporting said vibration mirror in the vibration space, wherein the vibration space is sealed and an air pressure therein is adjusted such that a characteristic of said vibration mirror falls within a predetermined range. - View Dependent Claims (25)
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26. An optical scanning apparatus, comprising;
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a vibration mirror having a mirror surface that reflects an optical beam;
a pair of torsion beams swingably supporting said vibration mirror in a sealed vibration space formed in said optical scanning apparatus; and
an air pressure adjusting part that adjusts an air pressure in the vibration space such that a characteristic of said vibration mirror falls within a predetermined range. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. An optical scanning apparatus, comprising;
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a vibration mirror having a mirror surface that reflects an optical beam and vibrated in a sealed vibration space formed in said optical scanning apparatus;
a pair of torsion beams swingably supporting said vibration mirror in the sealed vibration space; and
an air pressure adjusting part that adjusts an air pressure in the sealed vibration space such that a predetermined swing angle is obtained at a predetermined driving frequency or a predetermined band. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57)
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58. An image forming apparatus, comprising:
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an optical scanning apparatus;
a photo conductor on which an electrostatic image is formed by said optical scanning apparatus;
a developing part developing the electrostatic image by a toner; and
a transfer part transferring a developed toner image onto a sheet medium, said optical scanning apparatus including;
a vibration mirror having a mirror surface that reflects an optical beam and vibrated in a vibration space formed in said optical scanning apparatus; and
a pair of torsion beams swingably supporting said vibration mirror in the vibration space, wherein the vibration space is sealed and an air pressure therein is adjusted such that a characteristic of said vibration mirror falls within a predetermined range.
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59. An image forming apparatus, comprising:
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an optical scanning apparatus;
a photo conductor on which an electrostatic image is formed by said optical scanning apparatus;
a developing part developing the electrostatic image by a toner; and
a transfer part transferring a developed toner image onto a sheet medium, said optical scanning apparatus including;
a vibration mirror having a mirror surface that reflects an optical beam and vibrated in a sealed vibration space formed in said optical scanning apparatus;
a pair of torsion beams swingably supporting said vibration mirror in the sealed vibration space; and
an air pressure adjusting part that adjusts an air pressure in the sealed vibration space such that a characteristic of said vibration mirror falls within a predetermined range.
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60. An image forming apparatus, comprising:
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an optical scanning apparatus;
a photo conductor on which an electrostatic image is formed by said optical scanning apparatus;
a developing part developing the electrostatic image by a toner; and
a transfer part transferring a developed toner image onto a sheet medium, said optical scanning apparatus including;
a vibration mirror having a mirror surface that reflects an optical beam and vibrated in a sealed vibration space formed in said optical scanning apparatus;
a pair of torsion beams swingably supporting said vibration mirror in the sealed vibration space; and
an air pressure adjusting part that adjusts an air pressure in the sealed vibration space such that a predetermined swing angle is obtained at a predetermined driving frequency or a predetermined band.
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Specification