摘要:
An image forming apparatus includes a main assembly and a process cartridge. The main assembly contains and retains an electrophotographic photosensitive member, and therefore, the photosensitive member is not contained in the process cartridge. The process cartridge contains an electric charger, a developing device and/or cleaning device. The process cartridge is detachably mountable into the main assembly.
摘要:
An image forming apparatus provided with a positioning mechanism for positioning a process cartridge in the main assembly. The process cartridge is detachably mountable into the main assembly. The main assembly includes a bottom frame and a top frame which is capable of taking a closing position and an opening position. The process cartridge is loaded into the top frame or bottom frame. Prior to the start of image formation, the process cartridge is correctly positioned with respect to the bottom frame. The bottom frame contains the major part of the optical system, whereby the accurate relative position can be accomplished with an optical system of the cartridge.
摘要:
In a scanning optical apparatus including a single lens configured to convert a beam deflected by a polygon mirror into a spot-like image on a scanned surface, an angle β2 [deg] formed in a main scanning plane between the first optical axis and the second optical axis of the opposite lens surfaces of the lens satisfies the condition of −0.6
摘要:
An optical device including: a laser light emitting portion that emits laser light; a polygon mirror having a reflective surface that reflects the laser light, the polygon mirror being driven to rotate and deflecting the laser light emitted from the laser light emitting portion; a first lens through which the laser light reflected by the polygon mirror is transmitted, the first lens refracting the laser light; a second lens through which the laser light having passed through the first lens is transmitted, the second lens refracting the laser light; and an adjustment unit that adjusts at least one of a length of a first optical path between the polygon mirror and the first lens, and a length of a second optical path between the first lens and the second lens.
摘要:
An illumination type keytop is disclosed, in which a transmitted light restricting member is disposed opposite to a display portion formed in a part of a light intercepting layer and a colored and transparent filter member is disposed on the rear side thereof so that the display portion can be illuminated with light having a high directivity, which has passed through the transmitted light restricting member, at the illumination in the night, etc.
摘要:
In a scanning optical apparatus, light emitted from each of a plurality of light sources is converted by a first optical element into a beam of light, which in turn is converted by a second optical element into a linear image extending in a main scanning direction incident on a deflecting mirror at which the beams of light are deflected in the main scanning direction. A third optical element configured to convert the beams from the deflecting mirror into spot-like images is a single lens, and each of opposite lens surfaces thereof has a curvature in a sub-scanning direction varying continuously from a position corresponding to an optical axis thereof outward in the main scanning direction in such a manner that MTF values in a sub-scanning direction of an image formed on the scanned surface vary less with image height.
摘要:
An optical device including: a laser light emitting portion that emits laser light; a polygon mirror having a reflective surface that reflects the laser light, the polygon mirror being driven to rotate and deflecting the laser light emitted from the laser light emitting portion; a first lens through which the laser light reflected by the polygon mirror is transmitted, the first lens refracting the laser light; a second lens through which the laser light having passed through the first lens is transmitted, the second lens refracting the laser light; and an adjustment unit that adjusts at least one of a length of a first optical path between the polygon mirror and the first lens, and a length of a second optical path between the first lens and the second lens.
摘要:
In a cryotherapy apparatus 1, an FPSC2 (free piston type Stirling cooling machine) is used that is driven by a normal power supply, and that is comparatively small and inexpensive. In addition, to a heat absorbing portion 2a of the FPSC2 connected is a base end 6a of an inner pipe 6 in which a refrigerant that operates at a low temperature is encapsulated. As a result of this, when the FPSC2 is driven in a state where a heat exchanging portion 8 provided at a tip 6b of the inner pipe 6 is located on a predetermined site inside a body, heat moves from the heat exchanging portion 8 to the heat absorbing portion 2a of the FPSC2 through the refrigerant. At this time, the refrigerant encapsulated in the inner pipe 6 is insulated from the outside since a vacuumed gap S is formed by the inner pipe 6 being covered with an outer pipe 7. As a result of this, an ice ball is formed on the predetermined site where the heat exchanging portion 8 has been located.
摘要:
A light deflector includes: an oscillating mirror which includes a reflecting surface and which rotationally oscillates about a first axis; a mirror holder which holds the oscillating mirror; and a wiring drawn out from a surface of the mirror holder at a drawn-out start position, the drawn-out start position lying on a plane which includes the first axis and which is orthogonal to the reflecting surface of the oscillating mirror in a still state.
摘要:
To provide an image forming apparatus suppressing color slippage without using a mirror with high flatness, when a reflective surface of the mirror used in an optical system of, for example, yellow is formed in a completely flat surface, and a curvature R of the reflective surface of the mirror used in the optical system of magenta is +75 m, a deviation of a scanning position exceeds 100 μm at maximum, resulting in accentuating the color slippage. Meanwhile, when the mirror of yellow is replaced with the mirror having the curvature R of +300m, the slippage can be suppressed to 100 μm or less. Therefore, each mirror is selected, so that the curvature of each mirror becomes all positive or all negative. Thus, the deviation of the scanning position is in the same direction of laser beams L of each color, and the slippage can be prevented.