An image reading device includes a lens mirror array, a photoelectric conversion section, and a diaphragm section. The lens mirror array includes a plurality of optical elements. Each of the optical elements includes an incident-side lens surface, an upstream-side reflection surface, a downstream-side reflection surface, an emission-side lens surface, and a stray light reflection surface. The incident-side lens surface transmits and converges reflected light from a read surface. The upstream-side reflection surface reflects light made incident via the incident-side lens surface. The downstream-side reflection surface reflects the light. The emission-side lens surface transmits and converges the light and images the light on an imaging surface. The stray light reflection surface reflects stray light. The photoelectric conversion section receives, photoelectrically converts, and outputs the reflected light. The diaphragm section is disposed between the read surface and the incident-side lens surface and includes a slit-like opening section.

An image reading device includes a lens mirror array, a photoelectric conversion section, and a diaphragm section. The lens mirror array includes a plurality of optical elements. Each of the optical elements includes an incident-side lens surface, an upstream-side reflection surface, a downstream-side reflection surface, an emission-side lens surface, and a stray light reflection surface. The incident-side lens surface transmits and converges reflected light from a read surface. The upstream-side reflection surface reflects light made incident via the incident-side lens surface. The downstream-side reflection surface reflects the light. The emission-side lens surface transmits and converges the light and images the light on an imaging surface. The stray light reflection surface reflects stray light. The photoelectric conversion section receives, photoelectrically converts, and outputs the reflected light. The diaphragm section is disposed between the read surface and the incident-side lens surface and includes a slit-like opening section.

An image forming apparatus includes: a photosensitive member; a power supply that applies a bias voltage to the photosensitive member to charge a surface of the photosensitive member; a developer that develops an electrostatic latent image on the photosensitive member; an exposing device that forms the electrostatic latent image on the photosensitive member; a hardware processor; and a memory, wherein the memory stores, in advance, a relationship between a suitable AC voltage at which a discharge amount of AC electric discharge is balanced between positive and negative sides and a current value of a specific AC voltage, and the hardware processor controls the bias voltage in an AC charging type, detects the current value at the specific AC voltage, and determines a setting AC voltage on the basis of the relationship.

An image forming apparatus, including: an image signal generating portion configured to generate an image signal based on image data; a light source configured to emit a light beam based on the image signal; and a deflection device configured to deflect the light beam in a main scanning direction, wherein the image signal generating portion includes: a mode setting portion configured to set a plurality of modes including a mode in which a value of a pixel of the image data is not converted and a mode in which the value of the pixel in one or more lines is converted, to a plurality of areas into which a scanning area is divided in the main scanning direction, respectively; and a pixel value conversion portion configured to convert the value of the pixel in each mode in accordance with a position of the pixel in the main scanning direction.

An image forming apparatus includes: a forming unit configured to form an image on a sheet by forming a plurality of toner images using a plurality of types of toner, and transfer the plurality of toner images onto the sheet, or transfer the plurality of toner images onto the sheet via an intermediate transfer member; and a controller configured to control the forming unit to form a formed image and an antimicrobial pattern on the sheet based on first image data representing the formed image, wherein at least one first toner out of the plurality of types of toner is antimicrobial toner that includes an antimicrobial agent, at least one second toner out of the plurality of types of toner is non-antimicrobial toner that does not contain the antimicrobial agent, and the antimicrobial pattern is formed using the first toner.

An image processing apparatus includes circuitry configured to obtain audio data of audio collected through a microphone, determine whether the audio data has a noise level equal to or less than a threshold to generate a determination result, record the audio data when the determination result indicates that the noise level of the audio data is equal to or less than the threshold, and add the recorded audio data to image data.

An image forming apparatus which forms an image on a medium on the basis of an input image signal includes: an image carrier configured to carry a developed toner image transferred to the medium on a photoreceptor layer; a contact member arranged so as to be in contact with the surface of the photoreceptor layer; a trace pattern generating unit configured to generate a trace pattern indicating specific information on the image forming apparatus; a composition unit configured to add the trace pattern to the image signal; and an acquiring unit configured to acquire information on the thickness of the photoreceptor layer of the image carrier, wherein the trace pattern is used for arranging a plurality of image areas at respective positions, and the trace pattern generating unit is configured to generate the trace pattern with the image area whose size is reduced in accordance with reduction of the thickness of the photoreceptor layer.

Provided are a light scanning apparatus and an image forming apparatus including the same. The light scanning apparatus includes a housing, which includes a space therein; a light source module, which is installed at the housing and emits a light beam; a light deflector, which is installed on the bottom surface of the housing and deflects the light beam emitted by the light source module; an image forming optical system, which is installed in the space inside the housing and forms an image of the light beam deflected by the light deflector on a surface to be scanned; a flow restricting unit, which is arranged in the space inside the housing and restricts air flows formed as the light deflector is driven; and a cover, which covers the housing.

An image forming system includes an image forming unit including a first photosensitive member, a first developing unit, a second photosensitive member, a second developing unit, a third photosensitive member, a third developing unit, a fourth photosensitive member, and a fourth developing unit; a varnish applying unit; an irradiation unit; and a controller configured to control image formation by the image forming unit to form a black image, on which the varnish is superimposed, with yellow toner, magenta toner, and cyan toner.

A detection apparatus includes an image sensing device having an image sensing plane including a first periodic structure; and an optical system configured to illuminate a detection target including a second periodic structure different from the first periodic structure, and form an image of light from the detection target on the image sensing plane. Light having entered the image sensing plane generates a plurality of diffracted light beams of different orders in accordance with the first periodic structure. A normal of the image sensing plane is tilted with respect to an optical axis of the optical system such that the optical axis is located between diffracted light beams of adjacent orders not less than a first order among the plurality of diffracted light beams.