摘要:
An image forming method exposes a surface of an image bearer with light according to an image pattern including an image portion to form an electrostatic latent image, and includes: setting, among pixels constituting the image portion, at least a group of pixels existing at a boundary with respect to a non-image portion as a non-exposure pixel group, and at least a group of pixels existing at a boundary with respect to the non-exposure pixel group as a high power exposure pixel group; specifying, among the pixels constituting the image portion, a predetermined pixel as a target pixel, and a group of pixels existing at a boundary with respect to the non-image portion close to the target pixel as a boundary pixel group; and specifying a light power value of the target pixel based on image identification information acquired from the pixels constituting the image portion.
摘要:
An image forming method is for forming an image using an electrostatic latent image that is formed by exposing a surface of an image bearer in accordance with an image pattern that includes a plurality of image areas in combination. Each of the plurality of image areas includes a plurality of pixels. A part of pixels to be exposed in each of the plurality of image areas is set as a non-exposure pixel group in accordance with a position of any one of the plurality of image areas in the image pattern. Pixels that are different from the non-exposure pixel group in each of the plurality of image areas are set as a high-output exposure pixel group that is exposed with an optical output value that is higher than a predetermined optical output value that is needed to expose the image area.
摘要:
An image forming method includes exposing a surface of an image bearer with light according to an image pattern including an image portion and a non-image portion, the image portion constituted of a plurality of pixels, to form an electrostatic latent image correspondent to the image pattern, comparing the image pattern adjacent to each of the pixels with a comparison pattern constituted of a plurality of pixels to specify at least a group of pixels existing at a boundary with respect to the non-image portion as a group of non-exposure pixels among the pixels constituting the image portion, and executing determination of specifying at least a group of pixels adjacent to the group of non-exposure pixels as a group of high power exposure pixels exposed with light of a higher light power than a predetermined light power required for exposing the image portion among the pixels constituting the image portion.
摘要:
An image forming apparatus forms an image by exposing an image bearer on the basis of image data including at least one predetermined pattern. The image forming apparatus includes a processing device that sets an exposure amount of a plurality of exposure pixels. The predetermined pattern is constituted by the plurality of exposure pixels, and a peripheral region of the predetermined pattern in the image data is constituted by a plurality of non-exposure pixels. The processing device sets an exposure amount of an exposure pixel in a specific region that is adjacent to a boundary between the predetermined pattern and the peripheral region and is constituted by at least one exposure pixel in the predetermined pattern, and an exposure amount of an exposure pixel in a region other than the specific region in the predetermined pattern to values different from each other.
摘要:
An electrostatic latent image forming method for forming, on an image carrier, an electrostatic latent image that has a pattern where there are an irradiated area and a not-irradiated area in a mixed manner, the electrostatic latent image forming method comprises; adjusting an exposure condition of an irradiated area that is included in the irradiated area and is adjacent to the not-irradiated area so that an electric field intensity of an electrostatic latent image that corresponds to the not-irradiated area is increased so as to prevent adhesion of a developer, and irradiating the image carrier with light under the adjusted exposure condition.
摘要:
An optical scanning apparatus includes an optical deflector that deflects a light beam at a substantially constant angular velocity and an optical system that condenses the deflected light beam onto a to-be-scanned surface thereby performing optical scanning of the to-be-scanned surface. The to-be-scanned surface is a surface of a latent image carrier having a charge generation layer that generates carriers and a charge transport layer. A driving unit drives the optical deflector at a scanning frequency at which exposure is attained in a state where the carriers generated at the charge generation layer of the latent image carrier substantially stay still.
摘要:
An optical scanning device includes: a light source; a deflector deflecting light beam from the light source; a coupling lens carrying out coupling of the light beam from the light source; a first optical system leading the light beam from the coupling lens to the deflector; a scanning optical system leading the light beam deflected by the deflector to a to-be-scanned surface; and a phase-modulatable liquid crystal device disposed on a light path lying from the light source through the to-be-scanned surface and driven by an electric signal, wherein: the first optical system at least comprises an optical device having: a surface having power positive in a sub-scanning direction; and a surface having power positive in a main scanning direction.
摘要:
In an image forming method for forming an electrostatic latent image corresponding to an image pattern including an image portion and a non-image portion by exposing a surface of an image bearer with light based on the image pattern, the image portion has a plurality of pixels, the pixels constituting the image portion but not adjacent to at least a non-image portion are exposed with a first optical output that is higher than a given optical output obtained when the entire pixels corresponding to the image portion are exposed over a given time period.
摘要:
A method of measuring a total amount of latent image charge includes: scanning a sample with a charged particle beam, the sample having a charge distribution on a surface of the sample, the charge distribution being caused by forming an electrostatic latent image by exposure; measuring a state of a surface charge distribution on the sample based on a detection signal obtained by the scanning; obtaining an electric potential at a potential saddle point, the potential saddle point being formed by the surface charge distribution of the sample; obtaining an electrostatic latent image area, the electrostatic latent image being formed by the surface charge distribution of the sample; and performing a calculation using the electric potential at the potential saddle point and the electrostatic latent image area to measure a total amount of electric charge of the electrostatic latent image.
摘要:
An optical scanning lens used in a scanning and imaging optical system in which a beam deflected by a light deflector is condensed on or in the vicinity of a surface to be scanned. The optical scanning lens is formed through plastic mold, and a distribution of the refractive indexes Δn(x) inside of the optical scanning lens has a local maximum within a range through which the beam passes through the lens.