A method for manufacturing optical scanning systems by which plural optical scanning systems with different effective scanning widths can be manufactured by changing a polygon mirror alone is provided. The method includes the steps of designing a first scanning optical system using a first polygon mirror corresponding to a first value of effective scanning width; designing a second scanning optical system provided with a second polygon mirror corresponding to a second value of effective scanning width, the second value being smaller than the first value, wherein a reference point of deflection is located at the position of the reference point of deflection of the first scanning optical system; and adjusting a size and a position of the scanning lens so as to adjust a lateral magnification in a cross section in the sub-scanning direction of the imaging optical system.

A method for manufacturing optical scanning systems by which plural optical scanning systems with different effective scanning widths can be manufactured by changing a polygon mirror alone is provided. The method includes the steps of designing a first scanning optical system using a first polygon mirror corresponding to a first value of effective scanning width; designing a second scanning optical system provided with a second polygon mirror corresponding to a second value of effective scanning width, the second value being smaller than the first value, wherein a reference point of deflection is located at the position of the reference point of deflection of the first scanning optical system; and adjusting a size and a position of the scanning lens so as to adjust a lateral magnification in a cross section in the sub-scanning direction of the imaging optical system.

A movement member that causes a cleaning member to move so as to reciprocally move on a transparent member is provided. A cleaning process is performed in accordance with an instruction on a number of times of movement of the movement member.

An optical scanning device includes plural sets of optical paths, and in each set of optical paths, first and second light beams emitted from the two light sources having an opening angle in the main scanning direction are orthogonal to a deflection axis of a deflector and are deflected and scanned by the same surface of the deflector at different positions deviating from each other in a deflection axis direction. A first imaging optical element gives positive optical power to the deflected light beams to converge the light beams. A focal position exists between the first imaging optical element and a second imaging optical element arranged on the optical paths in front of first and second surfaces to be scanned on two photoconductive drums. A separation distance exists between the light beams.

An optical scanning device includes plural sets of optical paths, and in each set of optical paths, first and second light beams emitted from the two light sources having an opening angle in the main scanning direction are orthogonal to a deflection axis of a deflector and are deflected and scanned by the same surface of the deflector at different positions deviating from each other in a deflection axis direction. A first imaging optical element gives positive optical power to the deflected light beams to converge the light beams. A focal position exists between the first imaging optical element and a second imaging optical element arranged on the optical paths in front of first and second surfaces to be scanned on two photoconductive drums. A separation distance exists between the light beams.

Examples are disclosed that relate to a resonant scanning mirror system comprising a mirror structure mounted to a frame via an adhesive. One example provides a resonant scanning mirror system comprising a frame defining a perimeter around a space, the frame including a mirror mounting portion having an opening. The mirror system also comprises a mirror structure spanning the space, the mirror structure having an oscillating mirror portion and a foot, the foot being attached to the mirror mounting portion with an adhesive and being positioned such that a location of the opening in the mirror mounting portion at least partially defines a location of an edge of a fillet of the adhesive where the adhesive meets the foot of the mirror structure.

Examples are disclosed that relate to a resonant scanning mirror system comprising a mirror structure mounted to a frame via an adhesive. One example provides a resonant scanning mirror system comprising a frame defining a perimeter around a space, the frame including a mirror mounting portion having an opening. The mirror system also comprises a mirror structure spanning the space, the mirror structure having an oscillating mirror portion and a foot, the foot being attached to the mirror mounting portion with an adhesive and being positioned such that a location of the opening in the mirror mounting portion at least partially defines a location of an edge of a fillet of the adhesive where the adhesive meets the foot of the mirror structure.

To provide an optical scanning device including a lower housing including an opened upper part, an upper housing that covers the upper part of the lower housing, and an f lens on which a beam reflected by a rotating polygon mirror is incident. The lower housing includes a raised area being raised upward from a lower housing bottom surface. The f lens is mounted to face a bottom side of the raised area.

To provide an optical scanning device including a lower housing including an opened upper part, an upper housing that covers the upper part of the lower housing, and an f lens on which a beam reflected by a rotating polygon mirror is incident. The lower housing includes a raised area being raised upward from a lower housing bottom surface. The f lens is mounted to face a bottom side of the raised area.

An optical deflection apparatus includes a mirror unit, a pair of elastic supporting units configured to rotatably support the mirror unit around a predetermined axis, at least one drive unit configured to elastically deform the pair of elastic supporting units, and a drive control unit configured to input a drive frequency into the at least one drive unit so as to control the at least one drive unit, wherein a first time interval at which the drive control unit changes the drive frequency in a first temperature range is shorter than a second time interval at which the drive control unit changes the drive frequency in a second temperature range, the second temperature range being at a higher temperature than the first temperature range.